Lightweight auxiliary frame damping liquid bushing

Abstract

The utility model discloses a lightweight auxiliary frame damping liquid bushing, including coaxial assembly's inner cover, outer cover and cage type framework, cage type framework and the main body structure component of first elastomer symmetry arranged two second elastomers are arranged in the middle, the inner cover is the circular cylinder component of aluminium alloy material quality, the first elastomer is covered outside cage type framework through high temperature vulcanization, damping liquid bushing uses lightweight material to replace traditional high density high weight material to realize lightweight, satisfy the need of automobile weight reduction, use nylon material to replace rubber material to bear the pole limit limit big load working condition force, through the topology reinforcement of nylon cage type framework, the progressive damping characteristic of nylon limit cover ring, the thin -walled reinforcement of aluminium alloy inner cover three -dimensional space cooperation, under the multi -working condition such as axial compression, radial impact, torsional load, all show the dynamic performance of surpassing traditional metal bushing, and material cost reduces, and single piece production cycle shortens.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically, it relates to a lightweight subframe damping fluid bushing. Background Technology

[0002] With the development of new energy vehicles, the weight of battery packs is also increasing as customers demand higher vehicle range. As a result, the curb weight of battery packs is getting heavier and heavier, so the lightweight requirements for other vehicle components need to be pushed to the limit to compensate for the increased weight of battery packs.

[0003] A damping fluid bushing is an elastic connecting component used to connect the subframe to other structural components of the vehicle body or chassis (such as suspension control arms). By incorporating fluid chambers and channels within a rubber matrix, it dissipates the energy of high-frequency vibrations and noise that traditional rubber bushings cannot effectively filter through fluid friction (converting it into heat energy). This significantly improves the vehicle's ride quietness, ride comfort, and premium feel, and with optimized design, it can maintain or even enhance the vehicle's handling stability.

[0004] Traditional hydraulic bushings have a metal cage-like main frame, rubber limit sleeves, and cold-forged iron connecting sleeves. They cannot adapt to the trend of automobile weight reduction and cannot meet the higher quality requirements of automobiles, thus having certain limitations. Utility Model Content

[0005] The purpose of this utility model is to provide a lightweight subframe damping fluid bushing, which solves the technical problem that the main cage-like skeleton of the existing hydraulic bushing is made of metal, the limiting sleeve is made of rubber, and the connecting inner sleeve is made of cold-forged iron material, which cannot adapt to the development trend of automobile weight reduction.

[0006] The objective of this utility model can be achieved through the following technical solutions: A lightweight subframe damping fluid bushing includes an inner sleeve, an outer sleeve, and a cage-like frame coaxially assembled; two symmetrically arranged second elastic bodies are disposed between the main structural components formed by the cage-like frame and the first elastic body; the inner sleeve is a cylindrical component made of aluminum alloy; the cage-like frame is covered with the first elastic body through high-temperature vulcanization; the cage-like frame is made of nylon instead of traditional metal frame, and its outer surface is covered with the first elastic body at the top and bottom, presenting an outwardly convex corrugated part; a limiting plate is connected to the top of the inner sleeve; limiting collars are fitted at both the top and bottom ends of the inner sleeve.

[0007] Furthermore, the outer casing may be a substantially cylindrical structure and may be interference-fitted with the first elastomer using corrugated portions.

[0008] Furthermore, the first elastomer and the inner sleeve can be bonded to each other with an adhesive, or integrally molded by injection molding to form the main structural component of the damping fluid bushing.

[0009] Furthermore, the two second elastomers together form a substantially circular component that encircles the first elastomer, creating a sealed liquid chamber between the first and second elastomers to contain the injected damping fluid.

[0010] Furthermore, the limiting plate has a waist-shaped structure that is thick at both ends and thin in the middle, with a claw-like shape in the middle that engages with the inner sleeve.

[0011] Furthermore, the limiting collar extends downward and protrudes and thickens at the positions of the straight portions at the upper and lower ends of the inner sleeve.

[0012] Furthermore, the limiting collar is made of vulcanized nylon.

[0013] Furthermore, the top of the first elastomer is integrally vulcanized into a finned rubber.

[0014] The beneficial effects of this utility model are as follows: The damping fluid bushing provided by this utility model uses a lightweight material to replace the traditional high-density and high-weight material to achieve lightweighting, meeting the needs of automobile weight reduction. At the same time, nylon material is used instead of rubber material to withstand the large load conditions of the rod limit. Through the spatial synergy of the topological reinforcement of the nylon cage skeleton, the progressive damping characteristics of the nylon limit collar, and the thin-wall reinforcement of the aluminum alloy inner sleeve, it exhibits dynamic performance that surpasses that of traditional metal bushings under multiple working conditions such as axial compression, radial impact, and torsional load. At the same time, the material cost is reduced and the production cycle of a single piece is shortened. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 yes Figure 3 Cross-sectional view at point AA; Figure 5 yes Figure 3 Cross-sectional view at point BB; The attached diagram lists the components represented by each number as follows: 1. Limiting plate; 2. Limiting collar; 3. Limiting rubber; 4. Cage skeleton; 5. First elastomer; 6. Inner sleeve; 7. Outer sleeve; 8. Second elastomer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 - Figure 5 As shown, a lightweight subframe damping fluid bushing includes an inner sleeve 6, an outer sleeve 7, and a cage frame 4 coaxially assembled. The outer sleeve 7 is fitted over the inner sleeve 6, and the cage frame 4 is located between the inner sleeve 6 and the outer sleeve 7. The inner sleeve 6 can be a cylindrical component made of aluminum alloy, replacing traditional cold-forged iron parts. The wall thickness is reduced to 2.5mm while maintaining a yield strength of 220MPa, and the material is lightweight. The cage frame 4 is coated with a first elastomer 5 through high-temperature vulcanization, forming the main structural component of the damping fluid bushing. The elastomer 5 and the inner sleeve 6 can be bonded to each other with adhesive or integrally molded by injection molding to provide support for the whole vehicle. The cage frame 4 is made of nylon instead of traditional metal frame. Its outer surface is covered by the vulcanized first elastomer 5, which presents an outward corrugated part to enhance the lightweight characteristics of the damping fluid bushing. The outer sleeve 7 can be a basically cylindrical structure and uses the corrugated part to interfere with the first elastomer 5 to improve the connection stability and airtightness. The outer sleeve 7 seals the damping fluid and connects to the subframe.

[0018] Please refer to it again. Figure 2 and Figure 4 As shown, two symmetrically arranged second elastic bodies 8 are provided in the middle of the main structural component consisting of the cage-like frame 4 and the first elastic body 5. The two second elastic bodies 8 together form a basically circular component, which encircles the first elastic body 5, so that a sealed liquid chamber is formed between the first elastic body 5 and the second elastic body 8, and the damping liquid is contained therein.

[0019] Please refer to it again. Figure 1 and Figure 4As shown, the inner sleeve 6 is connected to a limiting plate 1 at the top. The limiting plate 1 has a waist-shaped structure that is thicker at both ends and thinner in the middle, providing a downward movement limit function and controlling the downward displacement of the entire vehicle. The middle part is claw-shaped and engages with the inner sleeve 6. Limiting rings 2 are fitted at both the upper and lower ends of the inner sleeve 6. The limiting rings 2 provide a forward and backward movement limit function and control the forward and backward displacement of the entire vehicle. The limiting rings 2 extend downward and protrude and thicken at the straight parts at the upper and lower ends of the inner sleeve 6 to enhance the overall shock absorption effect of the damping fluid bushing. The limiting rings 2 are made of nylon material instead of rubber material through vulcanization, which is inexpensive and lightweight. The top of the first elastomer 5 is integrally vulcanized with limiting rubber 3 to increase the thickness of the upper part of the first elastomer 5, providing a downward movement limit function for the bushing and controlling the downward displacement of the entire vehicle, so that it can cooperate with the limiting plate 1 for buffering and avoid direct contact.

[0020] The damping fluid bushing provided by this utility model uses lightweight materials to replace traditional high-density, high-weight materials to achieve weight reduction, meeting the needs of automobile weight reduction. At the same time, nylon material is used instead of rubber material to withstand the extreme limiting load conditions. Through the spatial synergy of the topological reinforcement of the nylon cage skeleton 4, the progressive damping characteristics of the nylon limiting collar 2, and the thin-wall reinforcement of the aluminum alloy inner sleeve 6, it exhibits dynamic performance that surpasses that of traditional metal bushings under multiple conditions such as axial compression, radial impact, and torsional load. Meanwhile, material costs are reduced and the production cycle of a single piece is shortened.

[0021] The damping fluid bushing provided by this utility model includes the following steps in its preparation: Step 1: The aluminum alloy cage frame 4 is coated with the first elastomer 5 through high-temperature vulcanization to form the main structural component of the damping fluid bushing. Step 2: Simultaneously install and fix the second elastic element and the limiting collar 2 onto the main structural component; Step 3: Press the main structural component with the second elastic element and the limiting collar 2 into the sealing collar as a whole, and simultaneously inject damping fluid. Step 4: Press the claw-type snap-fit ​​piece in the middle of the limiting plate 1 into the center of the inner sleeve 6 to make them a single unit.

[0022] The main cage-like frame 4 uses nylon instead of metal to achieve weight reduction, while the limiting collar 2 uses nylon instead of traditional rubber to improve durability; the inner sleeve 6 uses aluminum alloy instead of cold-forged iron, reducing weight and offering cost advantages. Nylon parts have higher production efficiency than metal parts, and lower material costs. These key components work together to meet the demands for lightweighting and economy, satisfying the increasingly stringent technical specifications of the automotive market, thereby enhancing product competitiveness and overcoming technological barriers.

[0023] It is worth noting that during the early design and development process, the main cage-type nylon skeleton is prone to abnormal deformation during the high-temperature vulcanization stage, leading to exposed skeleton. The main reasons are inaccurate rubber mold positioning and improper rubber flow path design, resulting in uneven coating (e.g., excessively thin areas). To solve this problem, the following should be noted: 1. Product design optimization: Ensure smooth rubber flow, with the thinnest coating thickness of the skeleton not less than 0.8mm, avoiding stress concentration; 2. Mold design reinforcement: Use multi-point positioning (e.g., three-point pin groove) for the cage-type skeleton, controlling tolerances within ±0.05mm; 3. Engineering verification: Conduct extreme cross-validation of temperature-pressure-time parameters (e.g., 150°C / 15MPa / 300s combined test). These measures effectively prevented exposed skeleton and improved product yield (from 80% to 95%).

[0024] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A lightweight subframe damping fluid bushing, comprising an inner bushing (6), an outer bushing (7), and a cage-like frame (4) coaxially mounted; characterized in that: Two symmetrically arranged second elastic bodies (8) are provided in the middle of the main structural component consisting of the cage frame (4) and the first elastic body (5). The inner sleeve (6) is a cylindrical component made of aluminum alloy; the cage frame (4) is covered with a first elastomer (5) by high-temperature vulcanization. The cage-like skeleton (4) is made of nylon instead of traditional metal skeleton, and its outer surface is covered by the vulcanized first elastomer (5) to form a convex corrugated part. The top of the inner sleeve (6) is connected to a limiting plate (1); both the upper and lower ends of the inner sleeve (6) are fitted with limiting collars (2).

2. The lightweight subframe damping fluid bushing according to claim 1, characterized in that: The outer jacket (7) may be a substantially cylindrical structure and may be interference-fitted with the first elastic body (5) by means of corrugations.

3. The lightweight subframe damping fluid bushing according to claim 1, characterized in that: The first elastomer (5) and the inner sleeve (6) can be bonded to each other by adhesive or integrally molded by injection molding to form the main structural component of the damping fluid bushing.

4. The lightweight subframe damping fluid bushing according to claim 1, characterized in that: The two second elastomers (8) together form a substantially circular component that encircles the first elastomer (5) so that a sealed liquid chamber is formed between the first elastomer (5) and the second elastomer (8) and contains the injected damping fluid.

5. A lightweight subframe damping fluid bushing according to claim 1, characterized in that: The limiting plate (1) is basically a waist-shaped structure that is thick at both ends and thin in the middle, with a claw-shaped middle section that engages with the inner sleeve (6).

6. A lightweight subframe damping fluid bushing according to claim 1, characterized in that: The limiting collar (2) extends downward and protrudes and thickens at the positions of the straight parts at the upper and lower ends of the inner sleeve (6).

7. A lightweight subframe damping fluid bushing according to claim 1, characterized in that: The limiting collar (2) is made of vulcanized nylon.

8. A lightweight subframe damping fluid bushing according to claim 1, characterized in that: The top of the first elastomer (5) is integrally vulcanized into a limited rubber (3).

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