High-stability rear trailing arm bushing with integrated structure

Abstract

The utility model relates to the technical field of bushings, in particular to a high-stability rear trailing arm bushing with an integrated structure, which comprises an outer sleeve, an inner core, a spring and a rubber body formed between the outer sleeve and the inner core, the inner core is located on the inner side of the outer sleeve. The spring is sleeved in the middle of the inner core and is immersed in the rubber body, so that not only can a larger lateral load and a larger torsion angle be borne, but also a stronger axial load can be still achieved under the condition that the rubber body is aged, and the capacity of absorbing vibration energy and the comfort of an automobile in the running process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of bushing technology, specifically to a highly stable rear trailing arm bushing with an integrated structure. Background Technology

[0002] To improve vehicle comfort and handling, independent suspension is increasingly used in rear suspensions. Common suspension types include multi-link suspension and double wishbone suspension. The trailing arm usually refers to the longitudinal control arm, which is more common in multi-link rear suspensions. The trailing arm is connected to the vehicle body through a bushing. The force from the wheels is transmitted to the vehicle body through the trailing arm bushing. Therefore, the stability and stiffness of the trailing arm bushing are important factors affecting the dynamic performance of the suspension.

[0003] In the prior art, Chinese Patent No. CN209649980U discloses a bushing and rear trailing arm assembly. By setting an inner skeleton, an outer skeleton arranged around the inner skeleton, and a rubber structure, the bushing has a certain shock absorption effect. During vehicle operation, the trailing arm bushing needs to withstand extremely large multi-directional loads and large torsional angles. Under the coupled action of multiple working conditions, the rubber of the bushing is prone to aging. The overall material properties of the aged rubber deteriorate, affecting the service life of the bushing and reducing the comfort during vehicle operation. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a highly stable rear trailing arm bushing with an integrated structure. It can not only withstand large lateral loads and torsional angles, but also maintain strong axial loads even when the rubber body ages, thus ensuring the ability to absorb vibration energy and the comfort of the vehicle during driving.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-stability trailing arm bushing with an integrated structure, comprising an outer sleeve, an inner core, a spring, and a rubber body formed between the outer sleeve and the inner core; the inner core is located inside the outer sleeve; the spring is sleeved in the middle of the inner core and submerged in the rubber body.

[0006] Preferably, the inner core consists of an inner rod and two baffles, both of which are fixedly sleeved on the inner rod; the spring is located between the two baffles; and both ends of the inner rod are provided with connectors.

[0007] Preferably, the spring is fixedly connected to both side baffles.

[0008] Preferably, the spring and the inner core are slidably connected.

[0009] Preferably, the outer diameter of the spring is not greater than the outer diameter of the retaining plate, while the inner diameter of the spring is greater than the outer diameter of the inner rod.

[0010] Preferably, the outer periphery of the spring is provided with rough edges.

[0011] Preferably, the outer sleeve, inner core, and spring are made of high-carbon steel or alloy steel.

[0012] Preferably, the length of the spring is not less than the distance between the two stoppers.

[0013] Preferably, the inner core is a one-piece structure.

[0014] Preferably, the inner core also has a through-hole for weight reduction along its axial direction.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting a spring on the inner rod and embedding the spring in the rubber body, the bushing can not only withstand large lateral loads and torsional angles, but also still have strong axial loads when the rubber body ages, thus ensuring the ability to absorb vibration energy and the comfort of the car during driving. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the axial cross-section of the bushing of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the bushing of this utility model;

[0018] Figure 3 This is a schematic diagram of the inner core structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the inner core and spring combined in this utility model;

[0020] Figure 5 This is a schematic diagram of the inner core and spring combination in Embodiment 2 of this utility model;

[0021] Figure 6 This is a schematic diagram of the spring structure in Embodiment 2 of this utility model.

[0022] In the diagram: 1 Outer sleeve, 2 Rubber body, 3 Inner core, 4 Spring, 31 Inner rod, 32 Stop plate, 33 Connector. Detailed Implementation

[0023] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.

[0024] See Figure 1-4 In one embodiment of this utility model, a high-stability trailing arm bushing with an integrated structure includes: an outer sleeve 1, a rubber body 2, an inner core 3, and a spring 4. The rubber body 2 is formed between the outer sleeve 1 and the inner core 3, and the spring 4 is sleeved in the middle of the inner core 3. After the rubber body 2 is vulcanized, the spring 4 is embedded in the rubber body 2. On the one hand, the rubber body 2 can withstand large lateral loads and torsional angles. On the other hand, the spring 4, as an internal buffer skeleton, can enable the bushing to have strong axial loads. Even if the rubber body 2 ages, the bushing's ability to absorb vibration energy can still remain stable.

[0025] Specifically, the inner core 3 is coaxially arranged with the outer sleeve 1. The inner core 3 is composed of an inner rod 31 and two baffles 32. The two baffles 32 are fixedly sleeved on the inner rod 31. Both ends of the inner rod 31 are provided with connectors 33 for connecting with the towing arm. The two baffles 32 are located inside the outer sleeve 1, while the two connectors 33 are located outside the outer sleeve 1. In this embodiment, the inner core 3 is an integral structure. In addition, two through-holes for weight reduction are also opened on the inner rod 31 along its axial direction.

[0026] The spring 4 is sleeved on the inner rod 31 and located between the two baffles 32. At the same time, the first and last ends of the spring 4 are fixedly connected to the baffles 32 at the corresponding positions. The fixed arrangement can make the bushing structure more stable. Furthermore, the outer diameter of the spring 4 is not greater than the outer diameter of the baffle 32, while the inner diameter of the spring 4 is greater than the outer diameter of the inner rod 31. This arrangement can create a sufficient gap between the spring 4 and the inner rod 31 to accommodate the rubber body 2, making the vulcanization and bonding of the rubber body 2 and the inner core 3 more stable.

[0027] In addition, under the limiting action of the two baffles 32, the rubber body 2 and the inner core 3 form a misaligned fit, which reduces the tendency of the shear force generated inside the bushing after it is subjected to load to separate the rubber body 2 and the inner core 3, thereby improving the overall stability of the bushing.

[0028] In one embodiment, such as Figure 5 and Figure 6 As shown, the spring 4 and the inner core 3 can be slidably connected. At this time, the spring 4 is slidably sleeved on the inner rod 31, and the spring 4 is clearance-fitted with the baffles 32 on both sides. This arrangement can make the spring 4 and the rubber body 2 integrated, thereby improving the overall stability of the bushing structure and its ability to absorb vibration energy.

[0029] In this embodiment, the length of the spring 4 is greater than the distance between the two baffles 32. It can be understood that the spring 4 is compressed between the two baffles 32. The spring 4 in the energy storage state has stronger rigidity and makes the vulcanized structure more stable.

[0030] In one embodiment, the outer periphery of the inner rod 31 and the outer periphery of the spring 4 can be roughened. The rough structure can increase the coefficient of friction of the contact surface with the rubber body 2, and further improve the stability of the bushing structure.

[0031] In one embodiment, the spring 4 needs to provide axial damping and cushioning, so it can be made of materials such as high carbon steel or alloy steel. At the same time, the outer sleeve 1 and the inner core 3 can also be made of materials such as high carbon steel or alloy steel.

[0032] This technical solution, by setting a spring on the inner rod and embedding the spring in the rubber body, enables the bushing to not only withstand large lateral loads and torsional angles, but also to maintain strong axial loads even when the rubber body ages, thus ensuring the ability to absorb vibration energy and the comfort of the vehicle during driving.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-stability trailing arm bushing with an integrated structure, characterized in that: It includes an outer sleeve (1), an inner core (3), a spring (4), and a rubber body (2) formed between the outer sleeve (1) and the inner core (3); the inner core (3) is located inside the outer sleeve (1); the spring (4) is sleeved in the middle of the inner core (3) and is embedded in the rubber body (2).

2. The high-stability trailing arm bushing with an integrated structure according to claim 1, characterized in that: The inner core (3) consists of an inner rod (31) and two baffles (32), both baffles (32) being fixedly sleeved on the inner rod (31); the spring (4) is located between the two baffles (32); and both ends of the inner rod (31) are provided with connectors.

3. A high-stability trailing arm bushing with an integrated structure according to claim 2, characterized in that: The spring (4) is fixedly connected to the baffles (32) on both sides.

4. A high-stability rear trailing arm bushing with an integrated structure according to claim 1 or 2, characterized in that: The spring (4) and the inner core (3) are slidably connected.

5. A high-stability trailing arm bushing with an integrated structure according to claim 2, characterized in that: The outer diameter of the spring (4) is not greater than the outer diameter of the baffle (32), while the inner diameter of the spring (4) is greater than the outer diameter of the inner rod (31).

6. A high-stability trailing arm bushing with an integrated structure according to claim 1, characterized in that: The spring (4) has rough edges on its outer periphery.

7. A high-stability trailing arm bushing with an integrated structure according to claim 1, characterized in that: The outer sleeve (1), inner core (3), and spring (4) are all made of high carbon steel or alloy steel.

8. A high-stability trailing arm bushing with an integrated structure according to claim 2, characterized in that: The length of the spring (4) is not less than the distance between the two stoppers (32).

9. A high-stability trailing arm bushing with an integrated structure according to claim 1, characterized in that: The inner core (3) is an integral structure.

10. A high-stability trailing arm bushing with an integrated structure according to claim 1, characterized in that: The inner core (3) also has a through-hole for weight reduction along its axial direction.

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