A dynamic vibration absorber assembly

Abstract

The utility model discloses a power vibration absorber subassembly, including a plurality of pairs of support and mass block, is equipped with a plurality of through -hole on the mass block, and each pair of support corresponds a through -hole. The support is composed of cylinder spare and limiting board, is divided into upper support and lower support, and the outer lateral wall is all wrapped rubber damping structure, and the both are clamped in the through -hole through the recess and protrusion cooperation's clamping mechanism, and the axis coincides. Rubber damping structure is equipped with first, second annular protruding, forms multidirectional gap and realizes the limit protection, and the passageway on first annular protruding constitutes pressure -relief drainage with each gap. The support is connected through vulcanization with rubber damping structure, and the shape size of cylinder spare wrapping department and first gap height can be adjusted. The component is convenient to assemble, and the coaxiality is high, can effectively promote the vibration absorption effect, durability and adaptability.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a power vibration absorber assembly. Background Technology

[0002] Abnormal vibrations caused by the vibration of automotive components during operation can severely affect NVH performance and impact overall vehicle comfort. Dynamic vibration absorbers are crucial components in automobiles, typically installed on parts such as the frame, chassis, steering wheel, tailgate, and roof to reduce vibrations and minimize structural noise resonance, thereby meeting overall NVH performance requirements. Currently, low natural frequency performance is essentially due to low product stiffness and strength. Consequently, when subjected to vehicle-wide vibration, the dynamic vibration absorber's mass block experiences significant displacement and low durability, leading to product failure. Existing dynamic vibration absorbers consist of a mass block, rubber body, and mounting bracket. To ensure durability, two limiting blocks or pins are usually pressed onto both ends of the mass block. Ensuring that the mass block, bracket holes, and rubber body are concentric is a significant challenge. Existing dynamic vibration absorbers cannot guarantee concentricity during assembly, resulting in low assembly efficiency and potential misalignment that negatively impacts the frequency performance of the dynamic vibration absorber.

[0003] In existing dynamic vibration absorbers, the upper and lower end faces of the mass block and the rubber damping block are fitted or interference-fitted to form an interference seal. However, this fit and interference seal cause the internal cavity of the dynamic vibration absorber to form a void gas (pressure) that is not uniform with the natural atmospheric pressure when the dynamic vibration absorber vibrates up and down. This gas can easily affect the product's natural frequency vibration performance. When the dynamic vibration absorber ages, the lower end will always be sealed due to the static load of the mass block, while the sealing performance of the upper end will decrease or fail after the rubber ages or creeps. Especially in rainy weather, rainwater and sand from the car chassis can enter the inner cavity of the rubber damping system from the upper end of the rubber. The lower end of the rubber is always under pressure and sealed due to the static load of the mass block, and rainwater cannot be discharged. This poses a risk of abnormal noise during vibration and will also affect important performance such as the product's natural frequency.

[0004] Existing dynamic vibration absorbers have rubber damping system structures with outer sleeves or, without outer sleeves, upper and lower support plates on a vulcanized assembly. The rubber support plates have large-diameter bosses at both ends. During assembly, one end of the rubber support plate needs to pass completely through the inner diameter of a mass block with a smaller inner diameter. This requires the rubber clamping plate at this end to be physically compressed during assembly to hold the mass block in the middle. This existing design makes the rubber damping support plate prone to uneven compression during compression, rubber damage, and cracking. The installation process is difficult and the assembly efficiency is low. To address the above problems, this application makes further improvements to the assembly process of the vibration absorber.

[0005] Existing dynamic vibration absorbers may involve relatively complex assembly processes. Improving assembly efficiency will significantly increase the manufacturing cost of the product. Current solutions for assembling vibration absorbers for low-frequency, high-durability applications are not satisfactory, especially as they involve adding extra frames, processes, and additional assembly time and costs.

[0006] The goal is to provide solutions to assemble or improve product assembly performance with minimal time and cost, addressing one or more shortcomings.

[0007] Existing technologies for dynamic vibration absorbers used in automobiles have the following drawbacks:

[0008] When assembling the rubber damping system onto the mounting bracket, a large load needs to be applied so that the radial boss of the rubber damping system passes through the through hole of the bracket, and the groove of the rubber damping system is completely locked onto the through hole of the mass block. During the rubber assembly compression process, the rubber is easily damaged by pressure and cracked, making the installation process difficult and the assembly efficiency low.

[0009] The existing dynamic vibration absorber mass block and rubber damping system lacks exhaust and drainage channels, resulting in a difference between the internal pressure of the damping system and the natural atmospheric pressure. This causes instability in the natural frequency and even the risk of product performance failure due to rainwater and mud entering the internal cavity.

[0010] Existing dynamic vibration absorbers lack a concave-convex structure and guide design during assembly, making it impossible to ensure that the mass block, bracket, and rubber damping system are coaxial. This results in poor assembly positioning, low assembly efficiency, and misalignment, which can easily affect the frequency performance of the vibration absorber. Utility Model Content

[0011] To address the technical problems existing in the background art, this utility model proposes a dynamic vibration absorber assembly.

[0012] The present invention proposes a dynamic vibration absorber assembly, which includes several pairs of brackets and a mass block. The mass block has several through holes, each corresponding to a pair of through holes. Each bracket consists of a cylindrical part and a circular limiting plate. The limiting plate is connected to one end face of the cylindrical part and their axes coincide.

[0013] A pair of supports are divided into an upper support and a lower support. The outer walls of the upper and lower supports are wrapped with rubber damping structures. The cylindrical parts of the upper and lower supports are provided with a snap-fit ​​mechanism on the end face away from the limiting plate, which can snap into the through hole. After snap-fit, the axes of the upper and lower supports coincide. The two limiting plates are located on both sides of the mass block, and the diameter of the limiting plate is larger than the diameter of the through hole.

[0014] Preferably, the rubber damping structure includes a limiting plate wrapping part and a cylindrical part wrapping part. The outer wall of the cylindrical part wrapping part is provided with a first annular protrusion and a second annular protrusion extending radially from the limiting plate wrapping part to the snap-fit ​​mechanism. The first annular protrusion is interference-fitted with the end face of the through hole and is sealed.

[0015] Preferably, there is a first gap between the first annular protrusion and the limiting plate wrapping part, which is used to limit and protect the mass block when the vibration absorber is subjected to extreme vibration in the Z direction.

[0016] Preferably, there is a second gap between the second annular protrusion and the first annular protrusion, and a third gap between the outer wall of the second annular protrusion and the inner wall of the through hole. When a pair of brackets are engaged, there is a fourth gap between the two sets of second annular protrusions, which is used to contact the inner wall of the through hole of the mass block when the vibration absorber is subjected to X-axis or Y-axis impact vibration.

[0017] Preferably, the first annular protrusion has several channels on the contact surface with the mass block, and each group of channels is connected to the second gap, the third gap and the fourth gap, together forming a pressure relief drainage channel.

[0018] Preferably, both the upper and lower supports are fixedly connected to the rubber damping structure by vulcanization.

[0019] Preferably, the snap-fit ​​mechanism is a concave-convex mating structure, including a boss provided on the end face of the upper support cylindrical component and a groove provided on the end face of the lower support cylindrical component, wherein the boss and the groove are adapted to each other.

[0020] Preferably, the shape and size of the cylindrical part being wrapped are adjustable.

[0021] Preferably, the height of the first gap can be adjusted by adjusting the distance between the first annular protrusion and the limiting plate wrapping part to change the limiting protection range during Z-axis extreme vibration.

[0022] The dynamic vibration absorber assembly proposed in this utility model has the following beneficial effects:

[0023] Existing dynamic vibration absorbers consist of rubber damping systems with integrated vulcanized inner and outer sleeves or integrated vulcanized inner sleeves and mass blocks. Their development process is complex, difficult, and time-consuming. Furthermore, adhesives are required to coat the mass blocks or inner and outer sleeves, which are costly and can generate harmful substances during application, impacting the operator's health. This patent connects the supports and mass blocks by quickly installing upper and lower rubber damping blocks, reducing the need for adhesive coating on the inner surface of the mass blocks or the outer surface of the outer sleeves, thus lowering costs. By using several pairs of supports and mass blocks with through holes, and with the upper and lower supports of each pair engaging within the through holes via a snap-fit ​​mechanism, assembly is convenient. This ensures that the axes of the upper and lower supports coincide after engagement, improving assembly efficiency and the coaxiality of components, thus guaranteeing effective vibration absorption.

[0024] The rubber damping structure is rationally designed. The first annular protrusion and the end face of the through hole are interference-fitted and sealed, enhancing the stability of the structure. The first gap provides effective limiting protection for the mass block when the vibration absorber is subjected to extreme vibration in the Z direction. The fit between the second annular protrusion and the relevant gap plays a limiting role when subjected to impact vibration in the X or Y direction, improving the durability of the vibration absorber. Limiting protection can be provided from any direction. Under extreme operating conditions, the limiting device can restrict the movement of the mass block in the up, down, left, and right directions. The extreme displacement will contact the rubber body of the rubber damping structure. The rubber damping block structure and the upper and lower brackets are integrally vulcanized and molded. The brackets provide great rigid support on the outside, thereby ensuring the high durability of the product. This connection method is relatively novel, with low development difficulty, low cost, short development time, and high compatibility.

[0025] When existing dynamic vibration absorbers operate in rainy weather, mud and sand can enter the inner cavity of the rubber damping system, affecting the frequency performance of the dynamic vibration absorber and even causing abnormal noise. In contrast, the channel on the first annular protrusion of this design connects with each gap to form a pressure relief drainage channel, which can effectively balance the air pressure in the inner cavity, discharge accumulated water and mud in a timely manner, avoid affecting the performance of the vibration absorber due to changes in air pressure or the accumulation of debris, and reduce the generation of abnormal noise.

[0026] The upper and lower supports are fixedly connected to the rubber damping structure through vulcanization, ensuring a firm and reliable connection and guaranteeing the stability and effectiveness of the rubber damping structure.

[0027] Existing dynamic vibration absorbers lack pre-positioning for the mass block or rubber damping block, or the rubber damping system lacks upper and lower concave-convex structures. During installation and assembly, proper positioning is difficult, and it cannot be guaranteed that the mounting holes of the bracket, the mass block, and the rubber damping block are coaxial. This poses a risk of eccentricity, affecting the performance of the dynamic vibration absorber. This patent addresses this by designing a grooved and bossed structure on the upper and lower bracket rubber damping system components, with detailed guiding designs. This allows for precise pre-positioning during assembly, ensuring coaxiality and improving assembly efficiency and performance stability. Assembly speed is fast, resulting in high production efficiency. The snap-fit ​​mechanism in this application uses a concave-convex fit structure, further improving the stability and accuracy of the snap-fit ​​between the upper and lower brackets.

[0028] The shape and size of the cylindrical part can be adjusted, making it easy to adjust the performance of the rubber damping structure according to actual needs; the height of the first gap can be adjusted, which can flexibly change the limit protection range during Z-axis extreme vibration, enhancing the adaptability of the product.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is an exploded view of the present invention;

[0032] Figure 3 This is a cross-sectional view of the present invention;

[0033] Figure 4 This is a front sectional view of the present invention;

[0034] Figure 5 This is a side sectional view of the present invention;

[0035] Figure 6 This is a schematic diagram of the upper and lower supports in this utility model;

[0036] Figure 7 This is a cross-sectional view of the upper and lower supports in this utility model;

[0037] Figure 8 Cross-sectional view of the mass block with other design shapes in this utility model.

[0038] The following are the labels in the diagram: 1001, upper support; 1002, lower support; 101, cylindrical component; 102, limiting plate; 2, rubber damping structure; 2001, cylindrical component wrapping part; 2002, limiting plate wrapping part; 201, first annular protrusion; 202, second annular protrusion; 203, first gap; 204, second gap; 205, third gap; 206, fourth gap; 207, channel; 3, mass block; 301, through hole; 4, pressure relief drainage channel. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] like Figures 1-8 The illustrated dynamic vibration absorber assembly includes several pairs of brackets 1 and mass blocks 3. Several through holes are provided on the mass blocks 3, and each through hole corresponds to a pair of through holes. Each bracket 1 consists of a cylindrical part 101 and a circular limiting plate 102. The limiting plate 102 is connected to one end face of the cylindrical part 101 and the axes coincide.

[0041] A pair of brackets 1 are divided into an upper bracket 1001 and a lower bracket 1002. The outer walls of the upper bracket 1001 and the lower bracket 1002 are both wrapped with rubber damping structures 2. The end face of the cylindrical part 101 of the upper bracket 1001 and the lower bracket 1002 away from the limiting plate 102 is provided with a snap-fit ​​mechanism, which can snap-fit ​​in the through hole. After snap-fit, the axes of the upper bracket 1001 and the lower bracket 1002 coincide. The two limiting plates 102 are located on both sides of the mass block 3, and the diameter of the limiting plate 102 is larger than the diameter of the through hole.

[0042] The rubber damping structure 2 can also be designed into other shapes under certain circumstances to meet the preload displacement sinking of the mass block 3 and the frequency performance requirements of the vibration absorber.

[0043] Preferably, the rubber damping structure 2 includes a limiting plate wrapping part 2002 and a cylindrical part wrapping part 2001. The outer side wall of the cylindrical part wrapping part 2001 is provided with a first annular protrusion 201 and a second annular protrusion 202 extending radially from the limiting plate wrapping part 2002 to the snap-fit ​​mechanism. The first annular protrusion 201 is interference-fitted with the end face of the through hole and is sealed.

[0044] Preferably, a first gap 203 is provided between the first annular protrusion 201 and the limiting plate wrapping portion 2002, which is used to provide limiting protection for the mass block 3 when the vibration absorber is subjected to extreme Z-axis vibration. The large vibration brought about by the dynamic vibration absorber under the extreme Z-axis motion condition of the whole vehicle can be protected by the limiting device provided by this limiting device.

[0045] Furthermore, there is a second gap 204 between the second annular protrusion 202 and the first annular protrusion 201, and a third gap 205 between the outer wall of the second annular protrusion 202 and the inner wall of the through hole. When a pair of brackets 1 are engaged, there is a fourth gap 206 between the two sets of second annular protrusions 202, which is used to contact the inner wall of the through hole of the mass block 3 when the vibration absorber is subjected to X-axis or Y-axis impact vibration.

[0046] When the dynamic vibration absorber is subjected to large impact vibrations in the X or Y direction of the vehicle, the radial second boss of the rubber damping structure 2 will contact the inner wall of the through hole of the mass block 3; thereby reducing the vibration of the mass block 3 and improving the vibration durability performance in the X and Y directions. After the dynamic vibration absorber is assembled, the second annular boss and the mass block 3 have an interference fit, thus making the assembly more secure and stable.

[0047] Furthermore, a plurality of channels 207 are provided on the contact surface between the first annular protrusion 201 and the mass block 3. Each group of channels 207 is connected to the second gap 204, the third gap 205 and the fourth gap 206, together forming a pressure relief drainage channel 4.

[0048] This utility model is designed with at least one pressure relief drainage channel 4. No matter which direction the vibration absorber vibrates, it can always keep the air pressure in the inner cavity consistent with the air pressure of the external natural environment, thereby eliminating the instability of the natural frequency or stiffness caused by air pressure differences. The second advantage of this design is that in rainy weather, when the vibration absorber is installed at the chassis position, splashed mud and rainwater will enter the inner cavity. However, the static load pressure of the mass block 3 itself keeps it under pressure and sealed, so that the rainwater and mud retained in the inner cavity can be discharged through the pressure relief drainage channel 4, thus not affecting the working performance of the natural frequency of the dynamic vibration absorber.

[0049] Preferably, the upper bracket 1001 and the lower bracket 1002 are both fixedly connected to the rubber damping structure 2 by vulcanization. The bracket 1 serves to support the rubber, improve the rubber stiffness, and support the strength of the assembly bolts.

[0050] Furthermore, the snap-fit ​​mechanism is a concave-convex mating structure, including a boss on the end face of the upper support 1001 cylindrical component 101 and a groove on the end face of the lower support 1002 cylindrical component 101. The boss and groove are matched, which greatly improves the assembly efficiency and ensures the inherent frequency performance of the product. It also ensures that the axes of the upper support 1001 and the lower support 1002 are coincident after snap-fit, which improves the assembly efficiency and the coaxiality of the components and helps to ensure the vibration absorption effect.

[0051] Furthermore, the shape and size of the cylindrical part 2001 are adjustable. The size, height, or shape can change the working performance of the dynamic vibration absorber, and the performance can be adjusted to a very low natural frequency. The rubber can be designed into an irregular shape and can contain multiple rubber leg shapes to change the working performance of the vibration absorber.

[0052] Furthermore, the height of the first gap 203 can be adjusted by adjusting the distance between the first annular protrusion 201 and the limiting plate wrapping part 2002 to change the limiting protection range during Z-axis extreme vibration, thereby improving the durability of Z-axis vibration.

[0053] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dynamic vibration absorber assembly, characterized by: It includes several pairs of brackets (1) and a mass block (3). The mass block (3) has several through holes (301). Each through hole (301) corresponds to a pair of brackets (1). Each bracket (1) consists of a cylindrical part (101) and a circular limiting plate (102). The limiting plate (102) is connected to one end face of the cylindrical part (101) and the axes coincide. A pair of brackets (1) are divided into an upper bracket (1001) and a lower bracket (1002). The outer walls of the upper bracket (1001) and the lower bracket (1002) are wrapped with rubber damping structures (2). The cylindrical part (101) of the upper bracket (1001) and the lower bracket (1002) are provided with a snap-fit ​​mechanism on the end face away from the limiting plate (102), which can snap-fit ​​in the through hole (301). After snap-fit, the axes of the upper bracket (1001) and the lower bracket (1002) coincide. The two limiting plates (102) are located on both sides of the mass block (3). The diameter of the limiting plate (102) is larger than the diameter of the through hole (301).

2. A dynamic absorber assembly according to claim 1, wherein The rubber damping structure (2) includes a cylindrical part wrapping part (2001) and a limiting plate wrapping part (2002). The outer wall of the cylindrical part wrapping part (2001) is provided with a first annular protrusion (201) and a second annular protrusion (202) extending radially from the limiting plate wrapping part (2002) to the snap-fit ​​mechanism. The first annular protrusion (201) is interference-fitted with the end face of the through hole (301) and sealed.

3. A dynamic absorber assembly according to claim 2, wherein The first annular protrusion (201) has a first gap (203) between it and the limiting plate wrapping part (2002), which is used to limit the mass block (3) when the vibration absorber is subjected to extreme vibration in the Z direction.

4. A dynamic absorber assembly according to claim 2, wherein There is a second gap (204) between the second annular protrusion (202) and the first annular protrusion (201), and there is a third gap (205) between the outer wall of the second annular protrusion (202) and the inner wall of the through hole (301). When a pair of brackets (1) are engaged, there is a fourth gap (206) between the two sets of second annular protrusions (202), which is used to contact the inner wall of the through hole (301) of the mass block (3) when the vibration absorber is subjected to X-axis or Y-axis impact vibration.

5. A dynamic absorber assembly according to claim 4, wherein The first annular protrusion (201) has several channels (207) on the contact surface with the mass block (3). Each group of channels (207) is connected to the second gap (204), the third gap (205) and the fourth gap (206) to form a pressure relief drainage channel (4).

6. A dynamic absorber assembly according to claim 1, wherein The upper bracket (1001) and the lower bracket (1002) are both fixedly connected to the rubber damping structure (2) by vulcanization.

7. A dynamic absorber assembly according to claim 1, wherein The snap-fit ​​mechanism is a concave-convex fit structure, including a boss on the end face of the upper support (1001) cylindrical part (101) and a groove on the end face of the lower support (1002) cylindrical part (101), wherein the boss and the groove are adapted to each other.

8. A dynamic absorber assembly according to claim 2, wherein The shape and size of the cylindrical part wrapping section (2001) are adjustable.

9. A dynamic absorber assembly according to claim 3, wherein The height of the first gap (203) can be adjusted by adjusting the distance between the first annular protrusion (201) and the wrapping part (2002) of the limiting plate, so as to change the limiting protection range when the Z-direction limit vibration occurs.

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