Automobile rear subframe damper

Abstract

The application discloses a car rear subframe shock absorber and belongs to the technical field of automobile parts. The car rear subframe shock absorber comprises a mass block and an inner core. 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. The inner wall of the mounting hole is lined with an upper sleeve and a lower sleeve. The upper sleeve and the lower sleeve are arranged in an upper-lower interval. 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 upper sleeve and the lower sleeve through a rubber piece. The top of the upper sleeve is outwardly bent to form an upper turn-up edge. The bottom of the lower sleeve is outwardly bent to form a lower turn-up edge. The turn-up edge design of the upper sleeve and the lower sleeve effectively prevents the cutting and falling off of the rubber piece.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a vibration absorber for a rear subframe of an automobile. 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 shock absorber for the rear subframe of an automobile, which effectively prevents the rubber parts from being cut and falling off through the flanged design of the upper and lower outer jackets.

[0007] The technical solution adopted in this application is as follows: a vibration absorber for a car rear subframe, comprising a mass block and an inner core. 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. An upper outer sleeve and a lower outer sleeve are lined on the inner wall of the mounting hole. The upper outer sleeve and the lower outer sleeve are arranged vertically at intervals. The inner core is located at the central axis of the mounting hole. The outer circumference of the inner core is connected to the upper outer sleeve and the lower outer sleeve through a rubber component. The top of the upper outer sleeve is bent outward to form an upper flange, and the bottom of the lower outer sleeve is bent outward to form a lower flange.

[0008] Compared with existing technologies, the advantages of this application are as follows: First, in existing technologies, the upper rubber bumper is easily cut and detached by the outer jacket's folded edge, while in this design, the top of the upper jacket is bent outwards to form an upward folded edge. This design ensures that the end face of the upper jacket no longer directly contacts the rubber part, effectively preventing the upper jacket's end face from cutting the rubber part and solving the problem of the upper rubber part detaching. Similarly, the bottom of the lower jacket is bent outwards to form a downward folded edge, which also prevents the lower jacket's end face from cutting the rubber part, further reducing the risk of damage to the rubber part during use.

[0009] Secondly, the dual design of the upper and lower jackets not only enhances structural stability but also provides double cushioning, further improving the vibration absorption effect of the shock absorber. This design allows the shock absorber to more effectively absorb and buffer vibration energy when subjected to vibrations of different directions and magnitudes. The design of the upper and lower flanges not only prevents the rubber parts from being cut but also increases the structural strength of the jacket, enabling it to better protect the rubber parts when subjected to impacts, further improving the reliability and durability of the shock absorber.

[0010] Finally, the outer periphery of the inner core is connected to the upper and lower outer jackets 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, transmit the vibration to the mass block, and cause the mass block to vibrate in the opposite direction, thereby offsetting or reducing the vibration of the rear subframe and improving the vehicle's NVH performance.

[0011] In some embodiments of this application, the inner core extends through the upper and lower end faces of the mounting hole, and an upper limit plate and a lower limit plate are respectively mounted on the top and bottom surfaces of the inner core. The outer edge of the upper limit plate is bent upward, and there is a gap between the bottom surface of the upper limit plate and the top surface of the rubber part.

[0012] The upper limit plate's outer edge curves upwards, increasing its structural strength while preventing direct friction and cutting of the rubber component by its edge. The gap between the bottom surface of the upper limit plate and the top surface of the rubber component provides deformation space, reducing excessive compression under stress and extending its service life.

[0013] 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 inside the clearance hole.

[0014] The diameter of the clearance hole is larger than that of the mounting hole, providing sufficient space for the lower limit plate and avoiding direct contact between the lower limit plate and the inner wall of the through hole, thus reducing friction and wear. At the same time, the clearance hole provides sufficient space for the deformation of the rubber parts, enhancing the cushioning performance of the vibration absorber.

[0015] In some embodiments of this application, there is a gap between the top surface of the lower limiting plate and the bottom surface of the rubber part, and the outer edge of the lower limiting plate is bent downward.

[0016] The gap between the top surface of the lower limit plate and the bottom surface of the rubber component provides deformation space for the rubber component, reducing excessive compression under stress and extending its service life. The outer edge of the lower limit plate bends downward, increasing its structural strength and preventing direct friction and cutting of the rubber component by the edge of the limit plate, further reducing wear on the rubber component.

[0017] In some embodiments of this application, the inner core is formed by coaxially connecting an upper inner sleeve and a lower inner sleeve, and the rubber part on the outer circumferential surface of the inner core is formed by coaxially connecting an upper rubber sleeve and a lower rubber sleeve.

[0018] This segmented design allows for greater flexibility in the manufacturing of the inner core and rubber components, facilitating processing and assembly. Simultaneously, the segmented design also facilitates partial replacement and maintenance when needed, improving the maintainability of the vibration absorber.

[0019] In some embodiments of this application, the upper inner sleeve, the upper rubber sleeve, and the upper outer sleeve constitute an upper bushing, and the lower inner sleeve, the lower rubber sleeve, and the lower outer sleeve constitute an upper bushing. The upper bushing and the lower bushing are press-fitted into the mounting hole from both ends of the mounting hole.

[0020] The design of the upper and lower bushings allows for a tighter fit between the components, enhancing the overall structural stability. The press-fit method ensures the bushings are securely mounted within the mounting holes, reducing assembly complexity and time costs, and improving assembly efficiency.

[0021] In some embodiments of this application, the bottom surface of the upper flange is attached to the top surface of the mass block, and an upper rubber sleeve is attached to the top surface of the upper flange.

[0022] The bottom surface of the upturned edge fits snugly against the top surface of the mass block, ensuring a tight fit between the upturned edge and the mass block and enhancing the stability of the structure. The upper rubber sleeve attached to the top surface of the upturned edge ensures the vibration damping performance of the shock absorber.

[0023] In some embodiments of this application, the lower flange is fitted to the outer end face of the mounting hole, and a lower rubber sleeve is attached to the bottom surface of the lower flange. Similarly, the lower flange fitting to the outer end face of the mounting hole ensures a tight fit between the lower flange and the mounting hole, enhancing the stability of the structure. The lower rubber sleeve attached to the bottom surface of the lower flange ensures the vibration damping performance of the vibration absorber.

[0024] 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 shape of the mass block is simple in design and facilitates processing and installation. 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.

[0025] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0026] 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.

[0027] 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 A sectional view of section AA in the middle.

[0028] The specific annotations in the attached drawings are as follows: 1. Mass block; 2. Inner core; 31. Mounting hole; 32. Clearance hole; 7. Upper outer sleeve; 8. Lower outer sleeve; 10. Upper flange; 11. Lower flange; 12. Upper limit plate; 13. Lower limit plate; 14. Upper inner sleeve; 15. Lower inner sleeve; 16. Upper rubber sleeve; 17. Lower rubber sleeve. Detailed Implementation

[0029] The present application will now be described in detail with reference to the accompanying drawings.

[0030] 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.

[0031] Rear subframe vibration absorber for automobiles, Example 1 as follows Figures 1 to 3As shown: The device includes a mass block 1 and an inner core 2. A through hole, which is a stepped hole, is provided at the central axis of the mass block 1, including a mounting hole 31 and a clearance hole 32. An upper outer sleeve 7 and a lower outer sleeve 8 are lined on the inner wall of the mounting hole 31, spaced vertically apart. The inner core 2 is located at the central axis of the mounting hole 31. The outer circumference of the inner core 2 is connected to the upper outer sleeve 7 and the lower outer sleeve 8 via a rubber component. The top of the upper outer sleeve 7 is bent outwards to form an upper flange 10, and the bottom of the lower outer sleeve 8 is bent outwards to form a lower flange 11. This design prevents the end face of the upper outer sleeve 7 from directly contacting the rubber component, effectively avoiding the cutting action of the end faces of the upper outer sleeve 7 and the lower outer sleeve 8 on the rubber component. This solves the problem of the upper rubber component detaching and also avoids the cutting action of the end face of the lower outer sleeve 8 on the rubber component, further reducing the risk of damage to the rubber component during use.

[0032] The dual design of the upper jacket 7 and lower jacket 8 not only enhances structural stability but also provides double cushioning, further improving the vibration absorption effect of the shock absorber. This design allows the shock absorber to more effectively absorb and buffer vibration energy when subjected to vibrations of different directions and magnitudes. The design of the upper flange 10 and lower flange 11 not only prevents the rubber parts from being cut but also increases the structural strength of the jacket, enabling it to better protect the rubber parts when subjected to impacts, further improving the reliability and durability of the shock absorber.

[0033] Example 2, as Figures 1 to 3 As shown, the inner core 2 penetrates the upper and lower end faces of the mounting hole 31. An upper limit plate 12 and a lower limit plate 13 are respectively mounted on the top and bottom surfaces of the inner core 2. The outer edge of the upper limit plate 12 is curved upwards, and there is a gap between the bottom surface of the upper limit plate 12 and the top surface of the rubber part. The upward curvature of the outer edge of the upper limit plate 12 increases the structural strength of the limit plate while preventing direct friction and cutting of the rubber part by the edge of the limit plate. The gap between the bottom surface of the upper limit plate 12 and the top surface of the rubber part provides deformation space for the rubber part, reducing excessive compression of the rubber part under stress and extending its service life.

[0034] The diameter of the clearance hole 32 is larger than the diameter of the mounting hole 31, and the lower limiting plate 13 is located within the clearance hole 32. The larger diameter of the clearance hole 32 provides sufficient space for the lower limiting plate 13, preventing direct contact between the lower limiting plate 13 and the inner wall of the through hole, thus reducing friction and wear. Simultaneously, the clearance hole 32 provides sufficient space for the deformation of the rubber component, enhancing the cushioning performance of the vibration absorber.

[0035] There is a gap between the top surface of the lower limiting plate 13 and the bottom surface of the rubber part, and the outer edge of the lower limiting plate 13 is bent downward. The gap between the top surface of the lower limiting plate 13 and the bottom surface of the rubber part provides deformation space for the rubber part, reducing excessive compression of the rubber part under stress and extending its service life. The downward bending of the outer edge of the lower limiting plate 13 increases the structural strength of the limiting plate, while avoiding direct friction and cutting of the rubber part by the edge of the limiting plate, further reducing wear on the rubber part.

[0036] The inner core 2 is formed by coaxially connecting the upper inner sleeve 14 and the lower inner sleeve 15, and the rubber parts on the outer circumference of the inner core 2 are formed by coaxially connecting the upper rubber sleeve 16 and the lower rubber sleeve 17. This segmented design makes the manufacturing of the inner core 2 and the rubber parts more flexible, and facilitates processing and assembly. At the same time, the segmented design also facilitates partial replacement and maintenance when needed, improving the maintainability of the vibration absorber.

[0037] The upper inner sleeve 14, upper rubber sleeve 16, and upper outer sleeve 7 constitute the upper bushing, and the lower inner sleeve 15, lower rubber sleeve 17, and lower outer sleeve 8 constitute the upper bushing. The upper and lower bushings are press-fitted into the mounting holes 31 from both ends. The design of the upper and lower bushings allows for a tighter fit between the components, enhancing the stability of the overall structure. The press-fitting method ensures the bushings are securely mounted within the mounting holes 31, reducing the complexity and time cost of the assembly process and improving assembly efficiency.

[0038] The bottom surface of the upper flange 10 is attached to the top surface of the mass block 1, and an upper rubber sleeve 16 is attached to the top surface of the upper flange 10. The close fit between the bottom surface of the upper flange 10 and the top surface of the mass block 1 ensures a tight fit and enhances the stability of the structure. The upper rubber sleeve 16 attached to the top surface of the upper flange 10 ensures the vibration damping performance of the shock absorber.

[0039] The lower flange 11 is fitted to the outer end face of the mounting hole 31, and a lower rubber sleeve 17 is attached to the bottom surface of the lower flange 11. Similarly, the lower flange 11 is fitted to the outer end face of the mounting hole 31, ensuring a tight fit between the lower flange 11 and the mounting hole 31, and enhancing the stability of the structure. The lower rubber sleeve 17 attached to the bottom surface of the lower flange 11 ensures the vibration damping 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. This cylindrical structure is simple in design and facilitates 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 vibration absorber for the rear subframe of an automobile, characterized in that, The device includes a mass block (1) and an inner core (2). The mass block (1) has a through hole at its central axis. The through hole is a stepped hole including a mounting hole (31) and a clearance hole (32). The inner wall of the mounting hole (31) is lined with an upper outer sleeve (7) and a lower outer sleeve (8). The upper outer sleeve (7) and the lower outer sleeve (8) are spaced apart vertically. The inner core (2) is located at the central axis of the mounting hole (31). The outer circumference of the inner core (2) is connected to the upper outer sleeve (7) and the lower outer sleeve (8) by a rubber component. The top of the upper outer sleeve (7) is bent outward to form an upper flange (10), and the bottom of the lower outer sleeve (8) is bent outward to form a lower flange (11).

2. The automotive rear subframe vibration absorber according to claim 1, characterized in that, The inner core (2) passes through the upper and lower end faces of the mounting hole (31). The upper limit plate (12) and the lower limit plate (13) are respectively installed on the top and bottom surfaces of the inner core (2). The outer edge of the upper limit plate (12) is bent upward, and there is a gap between the bottom surface of the upper limit plate (12) and the top surface of the rubber part.

3. The automotive rear subframe vibration absorber according to claim 2, characterized in that, The diameter of the clearance hole (32) is larger than the diameter of the mounting hole (31), and the lower limiting plate (13) is located inside the clearance hole (32).

4. The automotive rear subframe vibration absorber according to claim 3, characterized in that, There is a gap between the top surface of the lower limiting plate (13) and the bottom surface of the rubber part, and the outer edge of the lower limiting plate (13) is bent downward.

5. The automotive rear subframe vibration absorber according to claim 1, characterized in that, The inner core (2) is formed by coaxially connecting the upper inner sleeve (14) and the lower inner sleeve (15), and the rubber part on the outer circumference of the inner core (2) is formed by coaxially connecting the upper rubber sleeve (16) and the lower rubber sleeve (17).

6. The automotive rear subframe vibration absorber according to claim 5, characterized in that, The upper inner sleeve (14), upper rubber sleeve (16), and upper outer sleeve (7) constitute the upper bushing, and the lower inner sleeve (15), lower rubber sleeve (17), and lower outer sleeve (8) constitute the upper bushing. The upper bushing and lower bushing are pressed into the mounting hole (31) from both ends.

7. The automotive rear subframe vibration absorber according to claim 1, characterized in that, The bottom surface of the upper flange (10) is attached to the top surface of the mass block (1), and the top surface of the upper flange (10) is attached with an upper rubber sleeve (16).

8. The automotive rear subframe vibration absorber according to claim 1, characterized in that, The lower flange (11) is attached to the outer end face of the mounting hole (31), and a lower rubber sleeve (17) is attached to the bottom surface of the lower flange (11).

9. The automotive 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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