Power absorber and vehicle

Abstract

The present disclosure relates to a power absorber and a vehicle, the power absorber comprising: a first sleeve; a rubber piece, the rubber piece being sleeved on and connected with the first sleeve; a mass, the mass being sleeved on the rubber piece; and a limiting assembly, the limiting assembly comprising a first limiting piece and an elastic limiting piece, the first limiting piece being connected to an end of the first sleeve and stopping the mass, the elastic limiting piece being connected with the first limiting piece, at least part of the elastic limiting piece being located between the first limiting piece and the mass and a first distance being provided between the elastic limiting piece and the mass, the power absorber having better durability.

Description

Technical Field

[0001] This disclosure relates to the field of dynamic vibration absorber technology, and more specifically, to a dynamic vibration absorber and a vehicle. Background Technology

[0002] In related technologies, the increasing demands for higher NVH performance in vehicles have led to a greater need for heavier dynamic vibration absorbers. To maintain a constant frequency, the increased weight of the vibratory absorber's mass block results in a lower stiffness of the rubber spring. Consequently, the limiting structure formed by the rubber spring itself, which restricts the mass block's movement, is unable to withstand the impact of large loads, making it prone to limiting failure and ultimately causing durability failure of the dynamic vibration absorber. Utility Model Content

[0003] The purpose of this disclosure is to provide a dynamic vibration absorber and a vehicle, the dynamic vibration absorber having good durability.

[0004] To achieve the above objectives, this disclosure provides a dynamic vibration absorber, comprising: a first sleeve; a rubber component sleeved on and connected to the first sleeve; a mass block sleeved on the rubber component; and a limiting assembly, the limiting assembly comprising a first limiting member and an elastic limiting member, the first limiting member being connected to the end of the first sleeve and stopping the mass block, the elastic limiting member being connected to the first limiting member, and at least a portion of the elastic limiting member being located between the first limiting member and the mass block and having a first distance between them.

[0005] Through the above technical solution, by connecting an elastic limiting member to the first limiting member, the elastic limiting member can be partially positioned between the first limiting member and the mass block. When the mass block vibrates and displaces, it can contact the elastic limiting member. In this way, the load of the mass block can be transferred to the first limiting member through the elastic limiting member, allowing the first limiting member to stop and limit the mass block. Furthermore, the elastic limiting member can buffer the vibration of the mass block, absorbing the impact force during vibration. In addition, a first distance is provided between the portion of the elastic limiting member between the first limiting member and the mass block and the mass block. That is, after the elastic limiting member is connected to the first limiting member, there is still a certain space between the portion of the elastic limiting member between the first limiting member and the mass block and the mass block. This design ensures sufficient space between the first limiting member and the mass block for the elastic limiting member, and prevents the first limiting member from prematurely contacting and limiting the mass block, thus affecting the vibration absorption effect of the dynamic vibration absorber. In this disclosure, when the mass block vibrates and displaces, the contact between the mass block and the elastic limiting member can mitigate the deformation of the rubber component caused by the vibration displacement, thereby improving the durability of the rubber component. This prevents fatigue damage and durability failure that could occur when the rubber component, due to its low hardness, experiences significant deformation under impact alone when it is engaged with the first limiting member, thus affecting the durability of the dynamic vibration absorber. Simultaneously, the elastic limiting member can function as an independent component, with different hardness settings than the rubber component. The elastic limiting member, in conjunction with the first limiting member, provides rigid support to the mass block, jointly resisting large load impacts and stopping and limiting the mass block, thereby preventing excessive deformation of the rubber component and improving its durability. Thus, by using the elastic limiting member in conjunction with the first limiting member to limit the mass block, the durability of the dynamic vibration absorber is improved.

[0006] In some possible embodiments, the first limiting member includes a stop portion for stopping the mass block. A second distance exists between the end of the rubber member and the stop portion in the axial direction of the rubber member, the first distance being less than or equal to the second distance. This allows the elastic limiting member to contact the mass block before the end of the rubber member contacts the stop portion, reducing the contact between the end of the rubber member and the stop portion and lowering the risk of fatigue damage failure of the rubber member.

[0007] In some possible embodiments, the first limiting member includes a connecting body and a stop portion. The connecting body is inserted into and connected to the first sleeve. The stop portion is configured as a stop flange, which connects to the connecting body and protrudes radially from the connecting body. The elastic limiting member includes an elastic limiting portion disposed on the side of the stop flange facing the mass block. Thus, the elastic limiting portion can be positioned between the stop portion and the mass block to transfer the load to the stop portion, thereby rigidly supporting and limiting the mass block and preventing direct collision between the mass block and the stop portion.

[0008] In some possible embodiments, the elastic limiting member includes an enclosing structure, which includes a connecting portion and a blocking portion. The elastic limiting portion, the connecting portion, and the blocking portion are sequentially connected and together form an insertion groove. The stop flange is inserted into the insertion groove and is positioned between the elastic limiting portion and the blocking portion. Thus, the connection between the elastic limiting member and the first limiting member is achieved through the cooperation of the insertion groove and the stop flange, simplifying the operation and improving the assembly efficiency of the elastic limiting member.

[0009] In some possible embodiments, the dimension of the abutment in the radial direction of the connecting portion is smaller than the dimension of the elastic limiting portion in the radial direction of the connecting portion. This results in a larger opening between the limiting portion and the connecting portion, allowing the flange to be inserted into the insertion slot without requiring precise alignment, simplifying operation and improving assembly efficiency.

[0010] In some possible embodiments, the mass block is provided with a groove that recesses from the end face of the mass block along the axial direction of the rubber component. The elastic limiting member is partially located in the groove, and the elastic limiting member and the groove surface form the first distance and gap, respectively, in the axial and radial directions of the mass block. Thus, the groove can limit the elastic limiting member, reducing the risk of displacement or detachment during vibration. The first distance prevents premature intervention of the elastic limiting member, thus avoiding impact on the vibration absorption effect of the dynamic vibration absorber. The gap between the elastic limiting member and the groove surface in the radial direction of the mass block prevents interference, friction, or jamming between the groove surface and the elastic limiting member in the radial direction, thus avoiding impact on the vibration absorption effect.

[0011] In some possible embodiments, the rubber component includes a body and a first flange, the first flange being connected to an end of the body and extending radially along the body. A gap is formed between the elastic retaining member and the first flange in the radial direction of the rubber component. This prevents the first flange from contacting the elastic retaining member, which could cause friction or jamming during the vibration of the mass block, thus affecting the vibration absorption effect.

[0012] In some possible embodiments, the limiting assembly further includes a second limiting member connected to the end of the first sleeve and arranged opposite to the first limiting member. The second limiting member is used to stop the mass block. In this way, the first and second limiting members can jointly limit both ends of the mass block, preventing the mass block from detaching from the first sleeve and causing the dynamic vibration absorber to malfunction.

[0013] In some possible embodiments, the dynamic vibration absorber further includes a second sleeve fitted over and connected to the rubber component. A limiting flange is provided at the end of the second sleeve opposite to the elastic limiting member, extending radially from the end of the second sleeve. The rubber component includes a main body and a second flange, the second flange being connected to the end of the main body and extending radially thereafter. The second flange overlaps the limiting flange, which serves to stop the mass block. In this way, the limiting flange can first provide rigid support to the mass block, distributing the load and preventing the mass block from directly contacting the second flange, thereby reducing the risk of failure of the second flange.

[0014] According to a second aspect of this disclosure, a vehicle is provided, including the power shock absorber as described above.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Other features and advantages of this disclosure will be described in detail in the subsequent detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a cross-sectional view of a dynamic vibration absorber provided according to an embodiment of the present disclosure;

[0018] Figure 2 yes Figure 1 Enlarged view of point A;

[0019] Figure 3 This is a structural schematic diagram of a dynamic vibration absorber provided according to an embodiment of the present disclosure, wherein an elastic limiting member is shown;

[0020] Figure 4 This is a structural schematic diagram of a dynamic vibration absorber provided according to an embodiment of the present disclosure, wherein a second limiting member is shown.

[0021] Explanation of reference numerals in the attached figures

[0022] 1-First sleeve, 2-Rubber part, 21-Main body, 22-First flange, 23-Second flange, 3-Mass block, 31-Groove, 4-Limiting component, 41-First limiting component, 411-Stop part, 412-Connecting body, 42-Elastic limiting component, 421-Elastic limiting part, 422-Connecting part, 423-Blocking part, 43-Second limiting component, 5-Second sleeve, 51-Limiting flange, D1-First distance, D2-Second distance. Detailed Implementation

[0023] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0024] In this disclosure, unless otherwise stated, the directional terms "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself. Furthermore, the use of terms such as "first" and "second" is intended to distinguish different components and does not imply sequentiality or importance. Additionally, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same elements. Those skilled in the art should understand that the above definitions are for explanation and illustration only and should not be construed as limiting the scope of this disclosure.

[0025] A dynamic vibration absorber is a device that suppresses the vibration of a main system by adding a mass-elastic system. Its core function is to transfer the vibration energy of the main system to the absorber, thereby reducing the vibration amplitude of the main system.

[0026] Dynamic vibration absorbers are widely used in the development of vehicle NVH performance due to their low price and high efficiency. However, electric vehicles now have increasingly higher requirements for vehicle NVH performance, which leads to an increasing demand for the weight of dynamic vibration absorbers.

[0027] The natural frequency of a dynamic vibration absorber is a key indicator in its development and design. The formula for calculating the natural frequency is as follows: ,in, This is the natural frequency of the dynamic vibration absorber. The required stiffness for rubber component 2 in the dynamic vibration absorber This refers to the weight of the dynamic vibration absorber.

[0028] Under the condition that the main vibration frequency range is basically unchanged, due to the weight of the dynamic vibration absorber ( m As the temperature rises, the rubber components of the dynamic vibration absorber need to provide greater stiffness. kAs a result, the stiffness of the rubber components decreases, leading to a significant challenge in developing the durability of dynamic vibration absorbers.

[0029] In order to solve the above-mentioned technical problems, this application refers to... Figures 1 to 4 As shown, a dynamic vibration absorber is provided, comprising: a first sleeve 1; a rubber part 2, the rubber part 2 being sleeved on the first sleeve 1 and connected to the first sleeve 1; a mass block 3, the mass block 3 being sleeved on the rubber part 2; and a limiting assembly 4, the limiting assembly 4 comprising a first limiting member 41 and an elastic limiting member 42, the first limiting member 41 being connected to the end of the first sleeve 1 and stopping the mass block 3, the elastic limiting member 42 being connected to the first limiting member 41, at least a portion of the elastic limiting member 42 being located between the first limiting member 41 and the mass block 3 and being provided with a first distance D1 between the elastic limiting member 42 and the mass block 3.

[0030] Through the above technical solution, by connecting the elastic limiting member 42 to the first limiting member 41, the elastic limiting member 42 can be partially positioned between the first limiting member 41 and the mass block 3. When the mass block 3 vibrates and displaces, the mass block 3 can contact the elastic limiting member 42. In this way, the load of the mass block 3 can be transferred to the first limiting member 41 through the elastic limiting member 42, so that the first limiting member 41 can stop and limit the mass block 3. Furthermore, the elastic limiting member 42 can provide buffering for the vibration of the mass block 3 and absorb the impact force of the mass block 3 vibration. Furthermore, a first distance D1 is provided between the portion of the elastic limiting member 42 located between the first limiting member 41 and the mass block 3 and the mass block 3. This means that even after the elastic limiting member 42 is connected to the first limiting member 41, there is still a certain space between the portion of the elastic limiting member 42 located between the first limiting member 41 and the mass block 3 and the mass block 3. This design ensures sufficient space between the first limiting member 41 and the mass block 3 for the elastic limiting member 42 to be installed, and prevents the elastic limiting member from prematurely contacting and limiting the mass block 3, thus affecting the vibration absorption effect of the dynamic vibration absorber. In this disclosure, when the mass block 3 experiences vibration displacement, contact between the mass block 3 and the elastic limiting member 42 can reduce the deformation of the rubber part 2 caused by the vibration displacement of the mass block 3. This improves the durability of the rubber part 2 and prevents fatigue damage and durability failure caused by the low hardness of the rubber part 2 when it is in contact with the first limiting member, which could lead to fatigue damage and affect the durability of the dynamic vibration absorber. Meanwhile, the elastic limiting member 42 can function as an independent component, with different hardness settings compared to the rubber part 2. This allows the elastic limiting member 42 to cooperate with the first limiting member 41, providing rigid support for the mass block 3 to jointly resist the large load impact of the mass block 3 and stop and limit its movement. This prevents excessive deformation of the rubber part 2 and improves its durability. Thus, by using the elastic limiting member 42 in conjunction with the first limiting member 41 to limit the mass block 3, the durability of the dynamic vibration absorber is improved.

[0031] The elastic limiting member 42 can be made of a suitable elastic material such as rubber, and this disclosure does not impose any specific restrictions on it.

[0032] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 2As shown, the first limiting member 41 includes a stop portion 411, which is used to stop the mass block 3. In the axial direction of the first sleeve 1, there is a second distance D2 between the end of the rubber part 2 and the stop portion 411, where the first distance D1 is less than or equal to the second distance D2. Thus, when the mass block 3 vibrates and causes the rubber part 2 to undergo elastic deformation and move closer to the stop portion 411 along the axial direction of the rubber part 2, the elastic limiting member 42 contacts the mass block 3 first before the end of the rubber part 2 contacts the stop portion 411, thereby achieving the main stopping and limiting of the mass block 3. Therefore, the elastic limiting member 42 can first absorb vibration energy using its own elastic deformation, acting as a buffer for the mass block 3, and can transfer the load of the mass block 3 to the stop portion 411 through the elastic limiting member 42. Furthermore, the elastic limiting member 42 has hardness to cooperate with the rigid structure of the stop portion 411, thereby achieving the stopping and limiting of the mass block 3. When the mass block 3 moves to its limit position, the end of the rubber part 2 contacts the stop part 411 to achieve auxiliary stopping and limiting of the mass block 3. This reduces the contact between the end of the rubber part 2 and the stop part 411, lowering the risk of fatigue damage failure of the rubber part 2.

[0033] Preferably, the first distance D1 is equal to the second distance D2, but this disclosure does not impose any specific restrictions on this.

[0034] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 2 As shown, the first limiting member 41 includes a connecting body 412 and a stop portion 411. The connecting body 412 is inserted into and connected to the first sleeve 1. The stop portion 411 is configured as a stop flange, which is connected to the connecting body 412 and protrudes radially from the connecting body 412. The elastic limiting member 42 includes an elastic limiting portion 421, which is arranged on the side of the stop flange facing the mass block 3. Thus, the elastic limiting portion 421 is positioned between the stop portion 411 and the mass block 3. That is, in the axial direction of the rubber part 2, the first distance D1 between the elastic limiting portion 421 and the mass block 3 is less than or equal to the second distance D2 between the end of the rubber part 2 and the stop portion 411. When the mass block 3 vibrates and displaces, it can contact the elastic limiting part 421 to transfer the load to the stop part 411. The rigid support of the stop part 411 provides stopping and limiting, and the elastic deformation of the elastic limiting part 421 absorbs the impact of the mass block 3 to achieve buffering, preventing direct collision between the mass block 3 and the stop part 411. At the same time, the elastic limiting part 421 can extend circumferentially along the stop part 411 and be directly connected to the first limiting member 41 by means of adhesive bonding, so as to provide uniform buffering in the circumferential direction of the mass block 3 and reduce the risk of failure of the elastic limiting member 42 due to local stress concentration.

[0035] The elastic limiting part 421 can be connected to the stop part 411 by bonding, snapping or sleeve, etc., and this disclosure does not make specific limitations in this regard.

[0036] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 3 As shown, the elastic limiting member 42 includes an enclosing structure, which includes a connecting portion 422 and a blocking portion 423. The elastic limiting portion 421, the connecting portion 422, and the blocking portion 423 are sequentially connected and together form an insertion groove. The stop flange is inserted into the insertion groove and is limited between the elastic limiting portion 421 and the blocking portion 423. In this way, the connection between the elastic limiting member 42 and the first limiting member 41 can be realized through the cooperation of the insertion groove and the stop flange. That is, the elastic limiting member 42 can be directly sleeved on the stop flange along the circumference of the stop flange, which can realize the installation of the elastic limiting member 42. The operation is simple and improves the assembly efficiency of the elastic limiting member 42. Furthermore, when the elastic limiting member 42 ages after long-term use, it can be easily replaced.

[0037] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 2 As shown, the dimension of the abutment 423 in the radial direction of the connecting portion 422 is smaller than the dimension of the elastic limiting portion 421 in the radial direction of the connecting portion 422. This allows for a larger assembly opening between the abutment 423 and the connecting portion 422, enabling the first limiting member 41 to be directly pushed into the elastic limiting member 42 from the abutment 423 side during installation of the elastic limiting member 42. This allows the stop flange of the first limiting member 41 to be inserted between the abutment 423 and the elastic limiting portion 421 (i.e., inserted into the insertion groove), eliminating the need for precise alignment, simplifying operation, and improving the assembly efficiency of the elastic limiting member 42. The elastic limiting member 42 is a rotating component, which can be an interference fit fitted onto the first limiting member 41; this disclosure does not impose specific limitations on this.

[0038] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 3As shown, the mass block 3 is provided with a groove 31, which is recessed from the end face of the mass block 3 along the axial direction of the rubber part 2. The elastic limiting member 42 is partially located in the groove 31, and a first distance D1 and a gap are formed between the elastic limiting member 42 and the groove surface of the groove 31 in the axial direction and radial direction of the mass block 3, respectively. In this way, since the elastic limiting member 42 is partially placed in the groove 31, the groove 31 can limit the elastic limiting member 42, thereby reducing the risk of displacement or detachment of the elastic limiting member 42 during the vibration of the mass block 3. Since the elastic limiting member 42 and the groove 31 have a first distance D1 in the axial direction of the mass block 3, the elastic limiting member 42 can be prevented from prematurely contacting the mass block 3, thus avoiding affecting the vibration absorption effect of the dynamic vibration absorber. Since the elastic limiting member 42 and the groove 31 have a gap in the radial direction of the mass block 3, when the mass block 3 generates a vibration displacement in its axial direction, the groove surface of the groove 31 can avoid interference with the elastic limiting member 42 in the radial direction of the mass block 3, thus avoiding friction or jamming and affecting the vibration absorption effect.

[0039] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 2 As shown, the rubber component 2 includes a main body 21 and a first flange 22. The first flange 22 is connected to the end of the main body 21 and extends radially along the main body 21. In the radial direction of the rubber component 2, a gap is formed between the elastic limiting member 42 and the first flange 22. Thus, when the mass block 3 vibrates and displaces, the mass block 3 first contacts the elastic limiting member 42 to transfer the load to the first limiting member 41. The elastic limiting member 42 and the first limiting member 41 cooperate to provide primary stop and limit for the mass block 3. When the mass block 3 displaces to its limit position, the first flange 22 contacts the first limiting member 41, so that the cooperation of the first flange 22 and the first limiting member 41 can achieve auxiliary stop and limit for the mass block 3, ensuring the limiting effect of the mass block 3. At the same time, when the mass block 3 generates vibration displacement in its axial direction, since there is a gap between the elastic limiting member 42 and the first flange 22 in the radial direction of the rubber part 2, the first flange 22 can avoid contact with the elastic limiting member 42, thus avoiding friction or jamming and affecting the vibration absorption effect.

[0040] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 4As shown, the limiting component 4 also includes a second limiting member 43, which is connected to the end of the first sleeve 1 and arranged opposite to the first limiting member 41. The second limiting member 43 is used to stop the mass block 3. In this way, the first limiting member 41 and the second limiting member 43 can jointly limit both ends of the mass block 3, preventing the mass block 3 from detaching from the first sleeve 1 and causing the dynamic vibration absorber to malfunction. Alternatively, depending on the limiting requirements of the mass block 3, another elastic limiting member can be provided between the second limiting member 43 and the mass block 3 to prevent fatigue damage to the rubber component 2 and improve the durability of the rubber component 2 and the dynamic vibration absorber. This disclosure does not impose any limitations on this.

[0041] In the dynamic vibration absorber provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 4 As shown, the dynamic vibration absorber also includes a second sleeve 5, which is sleeved on and connected to the rubber component 2. A limiting flange 51 is provided at the end of the second sleeve 5 facing away from the elastic limiting member 42. The limiting flange 51 extends radially from the end of the second sleeve 5. The rubber component 2 includes a main body 21 and a second flange 23. The second flange 23 is connected to the main body 21 and extends radially along the main body 21. The second flange 23 overlaps with the limiting flange 51, which is used to stop the mass block 3. The first sleeve 1 and the second sleeve 5 can be connected by vulcanizing the rubber component 2. The first sleeve 1, the second sleeve 5, and the rubber component 2 are press-fitted into the mass block 3 with an interference fit. The first limiting member 41 and the second limiting member 43 are connected to the first sleeve 1 by riveting.

[0042] In this way, the mass block 3 can be sleeved on the second sleeve 5 from the end opposite to the limiting flange 51, and one end of the mass block 3 can abut against the limiting flange 51 of the second sleeve 5, while the other end is assembled by assembling the first limiting member 41 and the elastic limiting member 42. Thus, the first limiting member 41 and the second limiting member 43 can jointly limit the vibration of the mass block 3 in the axial direction. When the mass block 3 vibrates and displaces, since the second flange 23 overlaps with the limiting flange 51, the load of the mass block 3 can first be transmitted to the limiting flange 51, and then distributed through the contact surface of the limiting flange 51 before being transmitted to the second flange 23, so that the second flange 23 can absorb the vibration impact and achieve buffering. When the mass block 3 displaces to the limit position, the vibration load generated by the mass block 3 can be transmitted to the second limiting member 43, so as to achieve stop and limit through the second limiting member 43. Therefore, the limiting flange 51 can first play a rigid support role for the mass block 3 to distribute the load, and prevent the mass block 3 from directly contacting the second flange 23, thereby reducing the risk of the second flange 23 easily failing.

[0043] According to a second aspect of this disclosure, a vehicle is provided, including the dynamic vibration absorber described above. This vehicle possesses all the beneficial effects of the aforementioned dynamic vibration absorber, which will not be elaborated upon herein.

[0044] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0046] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A dynamic vibration absorber, characterized in that, The dynamic vibration absorber includes: First casing; A rubber component, which is sleeved on the first sleeve and connected to the first sleeve; A mass block, the mass block being fitted onto the rubber component; and A limiting component, comprising a first limiting member and an elastic limiting member, wherein the first limiting member is connected to the end of the first sleeve and stops the mass block, and the elastic limiting member is connected to the first limiting member, wherein at least a portion of the elastic limiting member is located between the first limiting member and the mass block and is provided with a first distance from the mass block.

2. The dynamic absorber of claim 1, wherein The first limiting member includes a stop portion, which is used to stop the mass block. In the axial direction of the rubber component, there is a second distance between the end of the rubber component and the stop portion, wherein the first distance is less than or equal to the second distance.

3. The dynamic vibration absorber according to claim 1 or 2, characterized in that The first limiting member includes a connecting body and a stop portion. The connecting body is inserted into and connected to the first sleeve. The stop portion is configured as a stop flange, which connects to the connecting body and protrudes radially from the connecting body. The elastic limiting member includes an elastic limiting portion, which is arranged on the side of the stop flange facing the mass block.

4. The dynamic absorber of claim 3, wherein The elastic limiting member includes an enclosing structure, which includes a connecting part and a blocking part. The elastic limiting part, the connecting part, and the blocking part are connected in sequence and together form an insertion groove. The stop flange is inserted into the insertion groove and is limited between the elastic limiting part and the blocking part.

5. The power absorber according to claim 4, characterized by The dimension of the blocking part in the radial direction of the connecting part is smaller than the dimension of the elastic limiting part in the radial direction of the connecting part.

6. The power absorber according to claim 1, wherein The mass block is provided with a groove, which is recessed from the end face of the mass block along the axial direction of the rubber part. The elastic limiting member is partially located in the groove, and the elastic limiting member and the groove surface of the groove form the first distance and gap respectively in the axial direction and the radial direction of the mass block.

7. The power absorber according to claim 1, wherein The rubber component includes a body and a first flange, the first flange being connected to the end of the body and extending radially along the body, and a gap being formed between the elastic limiting member and the first flange in the radial direction of the rubber component.

8. The power absorber according to claim 1, wherein The limiting component further includes a second limiting member, which is connected to the end of the first sleeve and arranged opposite to the first limiting member. The second limiting member is used to stop the mass block.

9. The dynamic absorber of claim 1, wherein The dynamic vibration absorber further includes a second sleeve, which is sleeved on and connected to the rubber component. A limiting flange is provided at the end of the second sleeve opposite to the elastic limiting member, and the limiting flange extends radially from the end of the second sleeve. The rubber component includes a main body and a second flange, the second flange being connected to an end of the main body and extending radially along the main body. The second flange overlaps the limiting flange, which is used to stop the mass block.

10. A vehicle characterized by comprising: Includes the dynamic vibration absorber as described in any one of claims 1-9.

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