Rubber suspension and vibration isolation structure

Abstract

The present application relates to a kind of rubber suspension vibration isolation structure and rubber suspension, vibration isolation structure in the present application includes the vibration isolation part being connected between the lower connecting portion and the upper connecting portion of rubber suspension;Wherein, vibration isolation part has multiple vibration isolation layers, multiple vibration isolation layers are sequentially arranged along the direction of upper connecting portion to lower connecting portion;In multiple vibration isolation layers, along the direction of upper connecting portion to the vibration isolation layer located in the middle portion, and along the direction of lower connecting portion to the vibration isolation layer located in the middle portion, the rubber hardness of each vibration isolation layer is sequentially arranged smaller gradually.This vibration isolation structure in the present application uses the vibration isolation layer with different hardness gradient arranged in vibration isolation part, while being able to absorb the energy of impact and vibration, since the vibration isolation layer has relatively higher hardness part, also makes the present vibration isolation structure have certain structural strength, and then when dealing with larger impact, the vibration isolation layer with higher hardness can be supported, to make vibration isolation layer more stable.

Description

Technical Field

[0001] This invention relates to the field of vehicle manufacturing technology, and in particular to a vibration isolation structure for rubber suspension. This invention also relates to a rubber suspension. Background Technology

[0002] As the automotive market develops and automotive-related technologies mature, consumers' demands for cars have moved beyond simply providing transportation; they now place higher demands on driving comfort. Among these demands, the primary issue to address in improving driving comfort is reducing vehicle noise and vibration.

[0003] When a vehicle is idling, the engine is the primary source of excitation. Engine vibration and noise are typically difficult to control, and when vibration and noise problems occur inside the vehicle, measures are mainly taken during the transmission of the excitation source. Some structures are connected to the engine through pipes and wiring harnesses, and engine vibration can be transmitted to the vehicle body and cab through this path. Furthermore, under normal circumstances, the rigid body modes of structures such as radiators are close to the second-order frequency of the engine at idle, making them more prone to resonance and amplifying vibration. Therefore, it is necessary to attenuate the vibration energy during its transmission to the cab. In existing technologies, rubber mounts are generally used to block and attenuate the engine's excitation source along its propagation path.

[0004] However, the inventors found in the actual production process that the existing rubber suspension structure is relatively simple, usually a relatively regular cylindrical smooth surface structure. The entire structure is made of rubber of the same hardness vulcanized and molded. The effect of attenuating the vibration energy passing through the rubber suspension and the vibration isolation effect is not ideal. Moreover, under the condition of large impact, the structural strength of the rubber suspension itself is insufficient and its own stability needs to be improved. Summary of the Invention

[0005] In view of this, the present invention aims to propose a rubber-suspended vibration isolation structure, so as to provide a more reasonable vibration isolation structure.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A vibration isolation structure for a rubber suspension includes a vibration isolation portion connected between a lower connecting portion and an upper connecting portion of the rubber suspension; the vibration isolation portion has multiple vibration isolation layers, which are sequentially arranged along the direction from the upper connecting portion to the lower connecting portion; among the multiple vibration isolation layers, the rubber hardness of each vibration isolation layer gradually decreases along the direction from the middle vibration isolation layer to the upper connecting portion and along the direction from the middle vibration isolation layer to the lower connecting portion.

[0008] Furthermore, the vibration isolation layer includes a first vibration isolation layer, a second vibration isolation layer, and a third vibration isolation layer arranged sequentially along the direction from the upper connecting portion to the lower connecting portion; using Shore A hardness tester, the difference in rubber hardness between the second vibration isolation layer and the first vibration isolation layer, and the difference in rubber hardness between the second vibration isolation layer and the third vibration isolation layer are both greater than 10 degrees.

[0009] Furthermore, based on Shore A hardness, the rubber hardness of the second vibration isolation layer is between 65 and 75 degrees, while the rubber hardness of both the first and third vibration isolation layers is between 45 and 55 degrees.

[0010] Furthermore, the vibration isolation part has a main body with a circular cross-section, and the diameter of the main body gradually increases along the direction from the upper connecting part to the lower connecting part.

[0011] Furthermore, the vibration isolation part also includes a support body connected to the outer peripheral surface of the main body, the top end of the support body being connected to the upper connecting part, and the bottom end of the support body being connected to the lower connecting part.

[0012] Furthermore, the diameter of the upper connecting portion is smaller than that of the lower connecting portion, and the outer end face of the support body facing away from the main body is flush with the outer peripheral surface of the upper connecting portion; and / or,

[0013] Along the direction from the top end to the bottom end, the thickness of the support gradually decreases in the circumferential direction of the main body.

[0014] Furthermore, the support body is a plurality of those arranged at intervals along the circumference of the main body, and the central angle formed between each two adjacent support bodies is gradually increased along a preset direction.

[0015] Furthermore, each of the aforementioned support bodies is provided with a mass block.

[0016] Furthermore, the masses of the mass blocks within the different supports are different.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention utilizes vibration isolation layers with different hardness gradients set in the vibration isolation section. While absorbing the energy of impact and vibration, it also has a certain structural strength. Therefore, when dealing with larger impacts, the vibration isolation layer with higher hardness can provide support, making the vibration isolation layer more stable.

[0019] Furthermore, the vibration isolation capabilities of the first and third vibration isolation sections, which have lower hardness, are ensured. The second vibration isolation section, with higher hardness, ensures the stability of the rubber suspension during operation when the vibration energy passing through it is excessive. Simultaneously, the use of vibration isolation layers with different hardnesses, due to their varying stiffness and damping, enhances the attenuation of broadband vibration energy.

[0020] Furthermore, the arched shape formed by the gradually increasing diameter of the main body can attenuate the vibration energy passing through the rubber suspension, thereby improving the energy absorption effect of this vibration isolation structure. Moreover, through the installed support structure, the wave effect generated by vibration at the weak points of the support structure can be utilized to convert the vibration energy passing through the vibration isolation structure into heat for attenuation.

[0021] Meanwhile, by optimizing the spacing angle of each support, the stiffness of the vibration isolation section varies in different radial directions of the rubber suspension, thereby improving the attenuation performance of broadband energy. Furthermore, the supports with different spacing angles also divide the arched structure into different lengths, further creating stiffness differences in different radial directions, thus enhancing the vibration energy attenuation effect of this vibration isolation structure.

[0022] Furthermore, by using mass blocks of different masses set in the support, the vibration energy of different frequencies passing through this vibration isolation structure can be attenuated, thereby improving the vibration isolation and energy absorption effect of this vibration isolation structure.

[0023] Another object of the present invention is to provide a rubber suspension comprising a cylindrical suspension body, the suspension body including an upper connecting portion, a lower connecting portion, and a vibration isolation structure for the rubber suspension connected between the upper connecting portion and the lower connecting portion.

[0024] Compared with the prior art, the rubber suspension in this invention has all the advantages of the above-mentioned vibration isolation structure, which will not be elaborated here. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are for explaining the invention. The directional terms used, such as front / back, up / down, etc., are only used to indicate relative positional relationships and do not constitute an improper limitation of the invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the rubber suspension structure with vibration isolation structure described in Embodiment 1 of the present invention;

[0027] Figure 2 This is a layered schematic diagram of the vibration isolation structure described in Embodiment 1 of the present invention;

[0028] Figure 3This is a schematic diagram of the arrangement of the support body on the main body according to Embodiment 1 of the present invention;

[0029] Figure 4 This is a schematic diagram of the lower connecting part according to Embodiment 2 of the present invention;

[0030] Figure 5 This is a half-sectional view of the rubber suspension described in Embodiment 2 of the present invention.

[0031] 1. Lower connecting part; 10. Insertion part; 100. Slot;

[0032] 2. Upper connecting part;

[0033] 3. Main body; 30. Vibration isolation layer; 301. First vibration isolation layer; 302. Second vibration isolation layer; 303. Third vibration isolation layer;

[0034] 4. Support body; 401. Top; 402. Bottom; 403. Mass block. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" 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 invention in light of the specific circumstances.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] This embodiment relates to a rubber-suspended vibration isolation structure, one exemplary structure of which is as follows: Figure 1 and combined Figure 2As shown, the vibration isolation structure generally includes a vibration isolation part connected between the lower connecting part 1 and the upper connecting part 2 of the rubber suspension.

[0041] The vibration isolation part has multiple vibration isolation layers 30, which are arranged sequentially along the direction from the upper connecting part 2 to the lower connecting part 1. Among the multiple vibration isolation layers 30, the rubber hardness of each vibration isolation layer 30 is arranged to gradually decrease along the direction from the middle vibration isolation layer 30 to the upper connecting part 2 and along the direction from the middle vibration isolation layer 30 to the lower connecting part 1.

[0042] In detail, in order to improve the vibration energy attenuation effect of this rubber suspension and to give it better structural strength, such as Figure 2 As shown, the vibration isolation layer 30 in this embodiment can be configured as three layers, including a first vibration isolation layer 301, a second vibration isolation layer 302, and a third vibration isolation layer 303 arranged sequentially along the direction from the upper connecting portion 2 to the lower connecting portion 1; and, using Shore A hardness as a hardness tester, the difference in rubber hardness between the second vibration isolation layer 302 and the first vibration isolation layer 301, and the difference in rubber hardness between the second vibration isolation layer 302 and the third vibration isolation layer 303, are both greater than 10 degrees. More advantageously, the rubber hardness of the second vibration isolation layer 302 is between 65 degrees and 75 degrees, preferably 70 degrees, and the rubber hardness of the first vibration isolation layer 301 and the third vibration isolation layer 303 are both between 45 degrees and 55 degrees, preferably 50 degrees.

[0043] Furthermore, for the different vibration isolation layers 30 arranged sequentially, the thickness ratio of the first vibration isolation layer 301, the second vibration isolation layer 302, and the third vibration isolation layer 303 can preferably be set to 1.5:2:3. Of course, other ratios (such as 1:1:1) are also possible, and can be flexibly set according to the specific working conditions. However, considering the specific structure and shape of this vibration isolation structure, setting it to 1.5:2:3 is a more reasonable setting.

[0044] Of course, in this embodiment, the vibration isolation layer 30 can be configured with other numbers of layers besides the feasible implementations described above, such as four or five layers, and a high-hardness rubber can be used in the middle layer. However, from the perspective of practical application and manufacturing, setting the vibration isolation layer 30 to three layers is more preferred.

[0045] In this way, when the vibration energy passing through the vibration isolation layer 30 is too large, the second vibration isolation layer 302 can ensure the stability of the rubber suspension during operation. At the same time, the vibration isolation layers 30 with different hardnesses, due to their different stiffness and damping, can improve the attenuation effect on broadband vibration energy.

[0046] In this embodiment, as Figure 3 and combined Figure 4As shown, in order to further improve the attenuation effect on the vibration energy passing through the rubber suspension, the vibration isolation part has a main body 3 with a circular cross-section, and the diameter of the main body 3 gradually increases along the direction from the upper connecting part 2 to the lower connecting part 1.

[0047] Thus, the diameter of the main body 3 gradually increases to form an arch shape. The arch structure can further attenuate the vibration energy passing through the rubber suspension.

[0048] Furthermore, in order to enhance the stability of this rubber suspension connection, such as Figure 1 and combined Figure 3 As shown, the vibration isolation section also includes a support body 4 connected to the outer peripheral surface of the main body 3. The top end 401 of the support body 4 is connected to the upper connecting part 2, and the bottom end 402 of the support body 4 is connected to the lower connecting part 1. Furthermore, the diameter of the upper connecting part 2 is smaller than that of the lower connecting part 1, and the outer end face of the support body 4 facing away from the main body 3 is flush with the outer peripheral surface of the upper connecting part 2; at the same time, along the direction from the top end 401 to the bottom end 402, the thickness of the support body 4 gradually decreases in the circumferential direction of the main body 3.

[0049] With this configuration, the support body 4 is triangular in shape. In this embodiment, the vibration isolation part can use the triangular support body 4 to connect the weaker parts, converting the vibration energy into heat in the form of waves, thereby attenuating the vibration energy.

[0050] In this embodiment, the number of supports 4 is set to four arranged circumferentially along the main body 3, and multiple supports 4 are spaced apart along the circumference of the main body 3, with the central angles formed between adjacent supports 4 gradually increasing in a predetermined direction. Preferably, the ratio of the gradually increasing central angles is set to 1:2:3:4. This results in differences in stiffness of the vibration isolation portion in the stress-bearing areas of the rubber suspension in different radial directions, thereby improving the attenuation performance of broadband energy. Furthermore, the supports 4 at different intervals also divide the arched structure into different lengths, further creating stiffness differences in different radial directions, thereby improving the attenuation effect of this vibration isolation structure on vibration energy.

[0051] In addition, the support body 4 is connected to the arched vibration reduction structure in the central area. The two work together to not only improve the vibration reduction effect, but also enhance the stability of the vibration isolation structure when it is subjected to a large external impact; thus making the overall design of this vibration isolation structure more reasonable.

[0052] It should be noted that the vibration isolation structure in this embodiment is integrally molded by rubber vulcanization. Therefore, in the process of making the vibration reduction structure in this way, the hardness of the support body 4 can also be set in layers. Of course, by optimizing the manufacturing process, it is also possible to set the overall Shore A hardness of the support body 4 to 70. However, from the perspective of manufacturing cost, it is more reasonable for the support body 4 to be molded together with the main body 3 and to have the same layered setting as the main body 3.

[0053] In this embodiment, to further enhance the attenuation effect on vibration energy of different frequencies, such as Figure 4 As shown, each support 4 is provided with a mass block 403. In specific implementations, the mass of the mass block 403 in different support 4 can be set to be different in order to attenuate vibration energy of different frequencies, thereby improving the attenuation effect of this embodiment on vibration energy passing through the rubber suspension.

[0054] In summary, one embodiment of the present invention utilizes vibration isolation layers with different hardness gradients disposed within the vibration isolation section. This allows for the absorption of impact and vibration energy while also possessing structural strength. Consequently, when faced with larger impacts, the harder portions of the vibration isolation layer provide support, enhancing the stability of the isolation layer. Furthermore, the use of vibration isolation sections with varying hardness corresponding to different layers ensures stability during rubber suspension operation. The different stiffness and damping of the vibration isolation layers with varying hardness also improve the attenuation effect on broadband vibration energy.

[0055] In addition, the arched shape formed by the gradually increasing diameter of the main body 3 can attenuate the vibration energy passing through this rubber suspension. Moreover, combined with the provided support body 4, it can also improve the stability of this rubber suspension during operation when the vibration isolation structure is subjected to a large impact. Furthermore, by optimizing the spacing angle of each support body 4, the stiffness of the vibration isolation part in the stress area of ​​different radial directions of the rubber suspension will vary, thereby improving the attenuation performance of broadband energy.

[0056] Furthermore, by using mass blocks 403 of different masses set in the support body 4, the vibration energy of different frequencies passing through this vibration isolation structure can be attenuated, thereby improving the vibration isolation and energy absorption effect of this vibration isolation structure.

[0057] Example 2

[0058] This embodiment relates to a rubber suspension, including a cylindrical suspension body; an exemplary structure is as follows: Figure 4 and combined Figure 5 As shown.

[0059] In detail, the suspension body includes an upper connecting part 2, a lower connecting part 1, and a vibration isolation structure for the rubber suspension connected between the upper connecting part 2 and the lower connecting part 1. The upper connecting part 2 is provided with an insertion hole, and the lower connecting part 1 is provided with an insertion part 10, on which a slot 100 is formed. In specific implementation, this rubber suspension is installed in a vehicle or other structure through the insertion hole and the slot 100 respectively, so as to attenuate and block the vibration energy transmitted between the structures connected to it.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rubber-suspended vibration isolation structure, characterized in that: The vibration isolation structure includes a vibration isolation part connected between the lower connecting part (1) and the upper connecting part (2) of the rubber suspension; the vibration isolation part has a plurality of vibration isolation layers (30), and the plurality of vibration isolation layers are arranged sequentially along the direction from the upper connecting part (2) to the lower connecting part (1); Among the plurality of vibration isolation layers (30), the rubber hardness of each vibration isolation layer (30) is gradually decreasing along the direction from the vibration isolation layer (30) located in the middle to the upper connecting part (2) and along the direction from the vibration isolation layer (30) located in the middle to the lower connecting part (1); The vibration isolation layer (30) includes a first vibration isolation layer (301), a second vibration isolation layer (302) and a third vibration isolation layer (303) arranged sequentially along the direction from the upper connecting portion (2) to the lower connecting portion (1); the thickness ratio of the first vibration isolation layer (301), the second vibration isolation layer (302) and the third vibration isolation layer (303) is 1.5:2:3; The vibration isolation part has a main body (3) with a circular cross-section, and the diameter of the main body (3) gradually increases along the direction from the upper connecting part (2) to the lower connecting part (1); The vibration isolation part also includes a support (4) connected to the outer peripheral surface of the main body (3). The top end (401) of the support (4) is connected to the upper connecting part (2), and the bottom end (402) of the support (4) is connected to the lower connecting part (1). Along the direction from the top end (401) to the bottom end (402), the thickness of the support (4) gradually decreases in the circumferential direction of the main body (3). The support (4) consists of multiple supports spaced apart around the main body (3), and the central angle formed between each two adjacent supports (4) is gradually increased along a preset direction. Each of the aforementioned supports (4) is provided with a mass block (403).

2. The vibration isolation structure with rubber suspension according to claim 1, characterized in that: Using Shore A hardness tester, the difference in rubber hardness between the second vibration isolation layer (302) and the first vibration isolation layer (301), and the difference in rubber hardness between the second vibration isolation layer (302) and the third vibration isolation layer (303) are both above 10 degrees.

3. The vibration isolation structure with rubber suspension according to claim 2, characterized in that: Based on Shore A hardness, the rubber hardness of the second vibration isolation layer (302) is between 65 and 75 degrees, while the rubber hardness of the first vibration isolation layer (301) and the third vibration isolation layer (303) are both between 45 and 55 degrees.

4. The vibration isolation structure with rubber suspension according to claim 1, characterized in that: The diameter of the upper connecting part (2) is smaller than that of the lower connecting part (1), and the outer end face of the support body (4) facing away from the main body (3) is flush with the outer peripheral surface of the upper connecting part (2); and / or, Along the direction from the top end (401) to the bottom end (402), the thickness of the support (4) gradually decreases in the circumferential direction of the main body (3).

5. The vibration isolation structure with rubber suspension according to claim 1, characterized in that: The masses of the mass blocks (403) within the different supports (4) are different.

6. A rubber suspension, characterized in that: Includes a cylindrical suspension body; The suspension body includes an upper connecting part (2), a lower connecting part (1), and a vibration isolation structure for the rubber suspension according to any one of claims 1 to 5 connected between the upper connecting part (2) and the lower connecting part (1).

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