A rear subframe damper

Abstract

The application discloses a rear subframe vibration absorber and belongs to the technical field of automobile parts, which comprises a mass block, an inner core and an outer sleeve, a through hole is arranged at the central axis of the mass block, the through hole is a stepped hole comprising a mounting hole and a clearance hole, an outer sleeve is lined on the inner wall of the mounting hole, the outer sleeve is in a circular tube structure, the inner core is located at the central axis of the mounting hole, the outer circumferential surface of the inner core is connected with the outer sleeve through a rubber piece, the inner core penetrates the upper and lower end surfaces of the mounting hole, upper and lower limit position plates are respectively arranged on the top surface and the bottom surface of the inner core, and rubber pads are wrapped around the outer circumferences of the upper and lower limit position plates. The application effectively solves the problems of rubber falling off and abrasion in the prior art by optimizing the structural design, and improves the stability and reliability of the vibration absorber.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a rear subframe vibration absorber. Background Technology

[0002] With the continuous development of the automotive industry, people have increasingly higher requirements for the comfort and safety of automobiles, and good vibration and noise performance (NVH) has become one of the important indicators for evaluating the quality of automobiles. As a key component of the automotive vibration reduction system, the dynamic vibration absorber functions by using its own vibration to offset or reduce the vibration generated by components such as the automotive powertrain, thereby reducing in-vehicle noise and improving ride comfort and vehicle driving safety.

[0003] However, existing dynamic vibration absorbers have some problems in actual use. For example, the rubber of the upper impact block is prone to falling off after a period of use. Preliminary analysis shows that this is mainly because the outer flange cuts the rubber during assembly or use, and the rubber is further damaged under pressure, leading to the failure of the connection between the rubber and the metal parts. This affects the normal operation of the vibration absorber, reduces the vibration reduction effect, and may even cause other safety hazards.

[0004] Furthermore, the rubber edges of the lower impact block are also prone to wear. Preliminary assessment suggests this is due to the conical pendulum force acting on the edge of the limiting plate during vehicle operation, causing repeated cutting and friction on the rubber edge, leading to gradual wear and affecting the performance and lifespan of the vibration absorber. These problems not only impact the vehicle's NVH performance but may also lead to premature damage to vehicle components, increasing repair costs and vehicle downtime.

[0005] To address the problems existing in the prior art and improve the reliability and durability of the dynamic vibration absorber, this utility model proposes a novel dynamic vibration absorber structure. The aim is to effectively prevent the detachment and wear of rubber components through optimized design, improve the vibration reduction performance and service life of the vibration absorber, and thus better meet the requirements of automobiles for vibration and noise control. Utility Model Content

[0006] The technical problem to be solved by this application is to provide a rear subframe vibration absorber. By optimizing the structural design, the problems of rubber shedding and wear in the prior art are effectively solved, and the stability and reliability of the vibration absorber are improved.

[0007] The technical solution adopted in this application is as follows: a rear subframe vibration absorber, comprising a mass block, an inner core, and an outer sleeve. A through hole is provided at the central axis of the mass block. The through hole is a stepped hole including a mounting hole and a clearance hole. The inner wall of the mounting hole is lined with an outer sleeve, which has a cylindrical structure. The inner core is located at the central axis of the mounting hole. The outer peripheral surface of the inner core is connected to the outer sleeve by a rubber component. The inner core passes through the upper and lower end faces of the mounting hole. An upper limit plate and a lower limit plate are respectively installed on the top and bottom surfaces of the inner core. Both the upper limit plate and the lower limit plate are wrapped with rubber pads on their outer peripheries.

[0008] Compared with the prior art, the advantages of this application are as follows: First, in the prior art, the upper impact block rubber is easily cut off by the outer sleeve. However, in this solution, the outer sleeve is designed as a cylindrical structure lining the inner wall of the mounting hole, and the inner core penetrates through the upper and lower end faces of the mounting hole. This structure avoids direct contact between the outer sleeve flange and the rubber, thereby effectively preventing the outer sleeve flange from cutting the rubber and solving the problem of the upper rubber falling off.

[0009] Secondly, addressing the issue of wear on the lower impact block's rubber edge, this solution involves separately vulcanizing the impact block rubber onto the limiting plate, i.e., the rubber pad in this application. Both the upper and lower limiting plates are wrapped with rubber pads. This design creates an integrated structure between the rubber and the limiting plate, enhancing the connection strength. Simultaneously, the rubber pad prevents direct friction and cutting between the limiting plate edge and the rubber edge, effectively reducing wear on the rubber edge.

[0010] Furthermore, a stepped hole, including a mounting hole and a clearance hole, is provided at the central axis of the mass block. The outer sleeve is lined to the inner wall of the mounting hole, and the inner core is located at the central axis of the mounting hole and connected to the outer sleeve through a rubber component. This compact structural layout, with clear positional relationships between the various components and close cooperation, enables the vibration absorber to work stably and collaboratively during operation, thereby improving the overall stability of the vibration absorber.

[0011] Finally, the inner core and outer shell are connected by rubber components. These rubber components have good elasticity. When the rear subframe vibrates during vehicle operation, the rubber components can effectively absorb and buffer the vibration energy, transferring the vibration to the mass block, causing the mass block to vibrate in the opposite direction. This counteracts or reduces the vibration of the rear subframe and improves the vehicle's NVH performance.

[0012] In some embodiments of this application, the diameter of the clearance hole is larger than the diameter of the mounting hole, and the lower limiting plate is located within the clearance hole. This structural design houses the lower limiting plate inside the mass block, reducing collisions. Simultaneously, it provides sufficient space for the deformation of the rubber component, enhancing the cushioning performance of the vibration absorber.

[0013] In some embodiments of this application, there is a gap between the rubber pad block located on the outer periphery of the upper limit plate and the top surface of the rubber component; there is a gap between the rubber pad block located on the outer periphery of the lower limit plate and the bottom surface of the rubber component.

[0014] The spacing allows the rubber pads some room to deform when subjected to impact, avoiding excessive compression between the rubber pads and the rubber components, thus extending the service life of the rubber pads and improving the dynamic performance of the vibration absorber.

[0015] In some embodiments of this application, the rubber pad has an overall annular structure, and the edge of the upper or lower limiting plate is inserted into the rubber pad.

[0016] The ring-shaped rubber pad and the edge insertion design of the limiting plate enhance the connection strength between the rubber pad and the limiting plate, prevent the rubber pad from falling off during use, and improve the overall reliability of the vibration absorber.

[0017] In some embodiments of this application, the inner diameter of the rubber pad is larger than the inner diameter of the rubber part, and the inner diameter of the rubber pad is smaller than the outer diameter of the rubber part.

[0018] This size design ensures sufficient contact area between the rubber pad and the rubber component, while avoiding excessive interference between them. This guarantees the normal deformation and cushioning function of the rubber component and improves the vibration absorption effect.

[0019] In some embodiments of this application, the outer diameter of the rubber pad is larger than the diameter of the mounting hole, and the outer diameter of the rubber pad is smaller than the outer diameter of the mass block. This application demonstrates a reasonable design of the rubber pad's dimensions.

[0020] In some embodiments of this application, the top surface of the rubber component is flush with the top surface of the mass block, and the bottom surface of the rubber component is flush with the bottom surface of the mass block; both the top and bottom surfaces of the rubber component are planar. This planar design, with the top and bottom surfaces of the rubber component flush with the mass block, makes the overall structure of the vibration absorber flatter, facilitating installation and assembly. It also ensures that the rubber component deforms uniformly under stress, improving the stability and consistency of the vibration absorber.

[0021] In some embodiments of this application, the rubber pad has a textured surface on one side near the rubber component. This textured design increases the friction between the rubber pad and the rubber component, improving the stability and reliability of the vibration absorber.

[0022] In some embodiments of this application, the rubber pad has multiple grooves spaced apart on one side near the rubber component, and the grooves are arranged radially along the rubber pad. This groove design not only increases the contact area between the rubber pad and the rubber component but also improves the deformation capacity of the rubber pad, enabling it to better absorb and buffer vibration energy when subjected to impact, thus enhancing the performance of the vibration absorber.

[0023] In some embodiments of this application, the mass block is generally cylindrical, with a sloping transition between its top surface and outer periphery. The cylindrical mass block design is simple and easy to manufacture and install. The sloping transition between the top and outer periphery reduces stress concentration, improves the structural strength of the mass block, and also contributes to the overall stability and reliability of the vibration absorber.

[0024] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0025] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a top view of this application; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 This is a schematic diagram of the internal structure of this application.

[0027] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Mass block; 2. Inner core; 3. Outer shell; 41. Mounting hole; 42. Clearance hole; 8. Rubber part; 9. Upper limit plate; 10. Lower limit plate; 11. Rubber pad; 12. Groove. Detailed Implementation

[0028] The present application will now be described in detail with reference to the accompanying drawings.

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] A rear subframe vibration absorber, embodiment one as follows Figures 1 to 4 As shown, the structure includes a mass block 1, an inner core 2, and an outer sleeve 3. A through hole, which is a stepped hole, is provided at the central axis of the mass block 1, including a mounting hole 41 and a clearance hole 42. The inner wall of the mounting hole 41 is lined with the outer sleeve 3. The inner core 2 is located at the central axis of the mounting hole 41 and is connected to the outer sleeve 3 via a rubber component 8. This compact structure, with clear positional relationships between components and close cooperation, allows the vibration absorber to work stably and collaboratively during operation, improving the overall stability of the vibration absorber. The outer sleeve 3 has a cylindrical tubular structure. The inner core 2 is located at the central axis of the mounting hole 41, and the outer circumference of the inner core 2 is connected to the outer sleeve 3 via the rubber component 8. This structure avoids direct contact between the flange of the outer sleeve 3 and the rubber, effectively preventing the flange of the outer sleeve 3 from cutting the rubber and solving the problem of the upper rubber detaching. The inner core 2 passes through the upper and lower end faces of the mounting hole 41. An upper limit plate 9 and a lower limit plate 10 are respectively mounted on the top and bottom surfaces of the inner core 2. Both the upper limit plate 9 and the lower limit plate 10 are surrounded by rubber pads 11. This design creates an integrated structure between the rubber and the limit plates, enhancing the connection strength. Simultaneously, the rubber pads 11 prevent direct friction and cutting between the edge of the limit plate and the edge of the rubber, effectively reducing wear on the rubber edge.

[0031] The inner core 2 and the outer shell 3 are connected by a rubber component 8. The rubber component 8 has good elasticity. When the rear subframe vibrates during vehicle operation, the rubber component 8 can effectively absorb and buffer the vibration energy and transmit the vibration to the mass block 1, causing the mass block 1 to vibrate in the opposite direction, thereby offsetting or reducing the vibration of the rear subframe and improving the NVH performance of the vehicle.

[0032] Example 2, as Figures 1 to 4 As shown, the diameter of the clearance hole 42 is larger than the diameter of the mounting hole 41, and the lower limiting plate 10 is located inside the clearance hole 42. This structural design houses the lower limiting plate 10 inside the mass block 1, reducing collisions. It also provides sufficient space for the deformation of the rubber part 8, enhancing the cushioning performance of the shock absorber.

[0033] There is a gap between the rubber pad 11 located on the outer periphery of the upper limit plate 9 and the top surface of the rubber component 8; there is a gap between the rubber pad 11 located on the outer periphery of the lower limit plate 10 and the bottom surface of the rubber component 8. The existence of the gap allows the rubber pad 11 to have a certain deformation space when subjected to impact, avoiding excessive compression between the rubber pad 11 and the rubber component 8, thereby extending the service life of the rubber pad 11 and improving the dynamic performance of the vibration absorber.

[0034] The rubber pad 11 has an overall annular structure, and the edge of the upper limit plate 9 or the lower limit plate 10 is inserted into the rubber pad 11. The design of inserting the annular rubber pad 11 into the edge of the limit plate enhances the connection strength between the rubber pad 11 and the limit plate, prevents the rubber pad 11 from falling off during use, and improves the overall reliability of the vibration absorber.

[0035] The inner diameter of the rubber pad 11 is larger than the inner diameter of the rubber part 8, and the inner diameter of the rubber pad 11 is smaller than the outer diameter of the rubber part 8. This size design ensures that there is sufficient contact area between the rubber pad 11 and the rubber part 8, while avoiding excessive interference between them, ensuring the normal deformation and buffering function of the rubber part 8, and improving the vibration absorption effect.

[0036] The outer diameter of the rubber pad 11 is larger than the diameter of the mounting hole 41, and the outer diameter of the rubber pad 11 is smaller than the outer diameter of the mass block 1. This application has reasonably designed the dimensions of the rubber pad 11.

[0037] The top surface of the rubber component 8 is flush with the top surface of the mass block 1, and the bottom surface of the rubber component 8 is flush with the bottom surface of the mass block 1. Both the top and bottom surfaces of the rubber component 8 are planar. This planar design, with the top and bottom surfaces of the rubber component 8 and the mass block 1 flush, makes the overall structure of the vibration absorber more level, facilitating installation and assembly. It also ensures that the rubber component 8 deforms uniformly under stress, improving the stability and consistency of the vibration absorber.

[0038] The rubber pad 11 has a textured surface on one side near the rubber component 8. The textured design increases the friction between the rubber pad 11 and the rubber component 8, thereby improving the stability and reliability of the vibration absorber.

[0039] The rubber pad 11 has multiple grooves 12 spaced apart on one side near the rubber component 8, with the grooves 12 arranged radially along the rubber pad 11. The groove 12 design not only increases the contact area between the rubber pad 11 and the rubber component 8, but also improves the deformation capacity of the rubber pad 11, enabling it to better absorb and buffer vibration energy when subjected to impact, thus enhancing the performance of the vibration absorber.

[0040] The mass block 1 has an overall cylindrical structure, with an inclined surface connecting its top surface and outer periphery. The cylindrical design of the mass block 1 is simple, facilitating processing and installation. The inclined surface transition between the top and outer periphery reduces stress concentration, improves the structural strength of the mass block 1, and also contributes to the overall stability and reliability of the vibration absorber.

[0041] The rest of the contents of Example 2 are the same as those of Example 1.

[0042] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A rear subframe vibration absorber, characterized in that, The device includes a mass block (1), an inner core (2), and an outer sleeve (3). The mass block (1) has a through hole at its central axis. The through hole is a stepped hole including a mounting hole (41) and a clearance hole (42). The inner wall of the mounting hole (41) is lined with an outer sleeve (3). The outer sleeve (3) has a cylindrical structure. The inner core (2) is located at the central axis of the mounting hole (41). The outer circumference of the inner core (2) is connected to the outer sleeve (3) by a rubber component (8). The inner core (2) passes through the upper and lower end faces of the mounting hole (41). The top and bottom surfaces of the inner core (2) are respectively equipped with an upper limit plate (9) and a lower limit plate (10). The outer circumference of both the upper limit plate (9) and the lower limit plate (10) is wrapped with a rubber pad (11).

2. The rear subframe vibration absorber according to claim 1, characterized in that, The diameter of the clearance hole (42) is larger than the diameter of the mounting hole (41), and the lower limiting plate (10) is located inside the clearance hole (42).

3. A rear subframe vibration absorber according to claim 1, characterized in that, There is a gap between the rubber pad (11) located on the outer periphery of the upper limit plate (9) and the top surface of the rubber part (8); there is a gap between the rubber pad (11) located on the outer periphery of the lower limit plate (10) and the bottom surface of the rubber part (8).

4. A rear subframe vibration absorber according to claim 1, characterized in that, The rubber pad (11) has an overall ring-shaped structure, and the edge of the upper limit plate (9) or the lower limit plate (10) is inserted into the rubber pad (11).

5. A rear subframe vibration absorber according to claim 4, characterized in that, The inner diameter of the rubber pad (11) is larger than the inner diameter of the rubber part (8), and the inner diameter of the rubber pad (11) is smaller than the outer diameter of the rubber part (8).

6. A rear subframe vibration absorber according to claim 4, characterized in that, The outer diameter of the rubber pad (11) is larger than the diameter of the mounting hole (41), and the outer diameter of the rubber pad (11) is smaller than the outer diameter of the mass block (1).

7. A rear subframe vibration absorber according to claim 1, characterized in that, The top surface of the rubber part (8) is flush with the top surface of the mass block (1), and the bottom surface of the rubber part (8) is flush with the bottom surface of the mass block (1). Both the top and bottom surfaces of the rubber part (8) are planar.

8. A rear subframe vibration absorber according to claim 1, characterized in that, The rubber pad (11) has a textured surface on one side near the rubber part (8).

9. A rear subframe vibration absorber according to claim 8, characterized in that, The rubber pad (11) has a plurality of grooves (12) spaced apart on one side near the rubber part (8), and the grooves (12) are arranged radially along the rubber pad (11).

10. A rear subframe vibration absorber according to claim 1, characterized in that, The mass block (1) has a cylindrical structure, and the top surface of the mass block (1) and the outer peripheral surface are connected by an inclined surface.

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