Spring compensation structure based anti-creep composite engine suspension

Abstract

A creep-resistant composite engine mount based on a spring-compensated structure is disclosed. This invention addresses the problem of traditional rubber mounts easily creeping under long-term dynamic loads, leading to a poor driving experience. The rear cover assembly further includes a base plate (22) located below the diaphragm cup; and an elastic element (23), one end of which is mounted on the base plate, and the other end of which provides elastic support to the bottom of the diaphragm cup. This invention provides a creep-resistant composite engine mount based on a spring-compensated structure. To delay deformation of the engine mount due to creep, a high-fatigue-resistant spring structure is integrated at the bottom of the engine mount, forming a composite mount of "rubber main spring + hydraulic damping + auxiliary spring." Through multi-level stiffness coupling and dynamic damping synergy, the creep resistance and wide-frequency vibration isolation performance of the mount are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a creep-resistant composite engine mount based on a spring compensation structure. Background Technology

[0002] As a key component of the powertrain system, the engine mount plays a crucial role in supporting, isolating vibrations, and managing impact loads. Traditional rubber mounts are prone to creep under long-term dynamic loads, leading to a decrease in support stiffness, engine positioning misalignment, and deterioration of NVH performance. This, in turn, can cause abnormal noises, resonance, and mechanical interference risks, resulting in a poor driving experience for the driver. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a creep-resistant composite engine mount based on a spring compensation structure, which mainly solves the problem that traditional rubber mounts are prone to creep under long-term dynamic loads, resulting in a poor driving experience for the driver.

[0004] The technical solution of this utility model is as follows:

[0005] A creep-resistant composite engine mount based on a spring-compensated structure includes a main spring and a rear cover assembly. The rear cover assembly includes a cup, and a reservoir for damping fluid is formed between the cup and the main spring. The rear cover assembly also includes...

[0006] A base plate is located below the leather cup;

[0007] An elastic element is mounted on the base plate at one end and used at the other end to provide elastic support for the bottom of the cup.

[0008] The elastic element is a spring.

[0009] The base plate is provided with a mounting post, one end of the spring is sleeved on the mounting post, and the other end abuts against the bottom end face of the leather cup.

[0010] The liquid storage chamber includes an upper liquid storage chamber and a lower liquid storage chamber. The upper liquid storage chamber and the lower liquid storage chamber are connected by a partition flow channel assembly. The partition flow channel assembly includes a first flow channel and a second flow channel. The first flow channel is used to connect the upper liquid storage chamber and the lower liquid storage chamber when there is low frequency and large amplitude, and the second flow channel is used to connect the upper liquid storage chamber and the lower liquid storage chamber when there is high frequency and small amplitude.

[0011] The baffle flow channel assembly includes an upper flow channel plate and a lower flow channel plate. A second flow channel is provided at the center of both the upper and lower flow channel plates. A decoupling membrane with a sealing fit is provided in the second flow channel. The decoupling membrane opens the second flow channel when subjected to high-frequency small amplitude vibration.

[0012] The first flow channel is located around the upper flow channel plate, and the top of the upper flow channel plate is provided with an inlet communicating with the first flow channel. Both the upper flow channel plate and the lower flow channel plate are provided with an outlet communicating with the first flow channel.

[0013] The main spring has internal support ribs made of metal.

[0014] The cross-section of the supporting rib is an arc-shaped surface.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a creep-resistant composite engine mount based on a spring compensation structure. In order to delay the deformation of the engine mount due to creep, a high fatigue-resistant spring structure is integrated at the bottom of the engine mount to form a composite mount of "rubber main spring + hydraulic damping + auxiliary spring". Through multi-level stiffness coupling and dynamic damping synergy, the creep resistance and wide-frequency vibration isolation performance of the mount are improved. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 3 This is a three-dimensional schematic diagram of the upper flow channel plate according to an embodiment of the present utility model.

[0019] Figure 4 This is a side view of the upper flow channel plate according to an embodiment of the present invention.

[0020] Figure 5 This is a three-dimensional schematic diagram of the lower flow channel plate according to an embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. A creep-resistant composite engine mount based on a spring-compensated structure includes a main spring 1 and a rear cover assembly 2. The rear cover assembly includes a cup 21, and a reservoir 3 for holding damping fluid is formed between the cup and the main spring. The rear cover assembly also includes a base plate 22 located below the cup; an elastic element 23, one end of which is mounted on the base plate, and the other end of which provides elastic support to the bottom of the cup. The high-performance spring device added to the bottom of the mount can effectively compensate for the creep deformation of the rubber material under long-term load. To address the problem of engine position sinking caused by rubber creep, the spring support structure can maintain the accuracy of the engine's installation position. Even under extreme operating conditions (such as rapid acceleration or bumpy roads), it can ensure sufficient safety clearance between the engine and surrounding components, eliminating the risk of collision.

[0022] In this embodiment, as shown in the figure, the elastic element is a spring.

[0023] In this embodiment, as shown in the figure, the base plate is provided with a mounting post 221, one end of the spring is sleeved on the mounting post, and the other end abuts against the bottom end face of the leather cup.

[0024] In this embodiment, as shown in the figure, the liquid storage chamber includes an upper liquid storage chamber 31 and a lower liquid storage chamber 32. The upper liquid storage chamber and the lower liquid storage chamber are connected by a partition flow channel assembly. The partition flow channel assembly includes a first flow channel 33 and a second flow channel 34. The first flow channel is used to connect the upper and lower liquid storage chambers during low-frequency, large-amplitude vibrations, and the second flow channel is used to connect the upper and lower liquid storage chambers during high-frequency, small-amplitude vibrations. During low-frequency, large-amplitude vibrations (such as engine idling), the liquid flow rate is slow, the inertial force is small, the decoupling membrane is closed, and the liquid flows slowly between the upper and lower liquid chambers through the first flow channel. Due to the small cross-sectional area of ​​the first flow channel, the liquid flow is restricted, generating high damping, consuming vibration energy, enhancing low-frequency vibration damping capability, and preventing large engine shaking. During high-frequency, low-amplitude vibrations (engine high-speed operation), the liquid flows rapidly under inertia, causing the decoupling membrane to deform quickly (unable to cover the second channel). The decoupling membrane detaches from the liquid chamber wall, opening the inertial channel (i.e., the second channel), allowing the liquid to flow freely through the inertial channel, thus reducing damping. This reduces the dynamic stiffness of the suspension and effectively isolates high-frequency noise.

[0025] In this embodiment, as shown in the figure, the baffle flow channel assembly includes an upper flow channel plate 35 and a lower flow channel plate 36. A second flow channel is provided at the center of both the upper and lower flow channel plates. A decoupling membrane 38, which is sealed within the second flow channel, opens the second flow channel when subjected to high-frequency, low-amplitude vibrations. The decoupling membrane is made of rubber or similar material and has a certain degree of elasticity; it deforms under high-frequency vibrations, thereby connecting the second flow channels.

[0026] In this embodiment, as shown in the figure, the first flow channel is disposed in the circumference of the upper flow channel plate, the top of the upper flow channel plate is provided with an inlet 351 communicating with the first flow channel, and both the upper flow channel plate and the lower flow channel plate are provided with an outlet 352 communicating with the first flow channel.

[0027] In this embodiment, as shown in the figure, the main spring has a metal support rib 11 inside. Simultaneously, an arc-shaped skeleton is vulcanized inside the rubber main spring to provide support for the suspension. When the rubber experiences stress relaxation, the spring can provide continuous support, and the arc-shaped skeleton structure provides elastic support, controlling the overall deformation of the suspension system within the design range and extending its service life.

[0028] In this embodiment, as shown in the figure, the cross-section of the supporting rib is an arc-shaped surface.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A creep-resistant composite engine mount based on a spring-compensated structure, comprising a main spring (1) and a rear cover assembly (2), wherein the rear cover assembly includes a cup (21), and a reservoir (3) for holding damping fluid is formed between the cup and the main spring, characterized in that: The rear cover assembly also includes The base plate (22) is located below the leather cup; The elastic element (23) is mounted on the base plate at one end and is used to provide elastic support for the bottom of the leather cup at the other end; The elastic element is a spring; The base plate is provided with a mounting post (221), one end of the spring is sleeved on the mounting post, and the other end abuts against the bottom end face of the leather cup; The liquid storage chamber includes an upper liquid storage chamber (31) and a lower liquid storage chamber (32). The upper liquid storage chamber and the lower liquid storage chamber are connected by a partition flow channel assembly. The partition flow channel assembly includes a first flow channel (33) and a second flow channel (34). The first flow channel is used to connect the upper liquid storage chamber and the lower liquid storage chamber when the frequency is low and the amplitude is large. The second flow channel is used to connect the upper liquid storage chamber and the lower liquid storage chamber when the frequency is high and the amplitude is small.

2. The creep-resistant composite engine mount based on a spring-compensated structure according to claim 1, characterized in that: The baffle flow channel assembly includes an upper flow channel plate (35) and a lower flow channel plate (36). A second flow channel is provided at the center of the upper flow channel plate and the center of the lower flow channel plate. A decoupling membrane (38) with a sealing fit is provided in the second flow channel. The decoupling membrane opens the second flow channel when subjected to high frequency and small amplitude vibration.

3. The creep-resistant composite engine mount based on a spring-compensated structure according to claim 2, characterized in that: The first flow channel is located around the upper flow channel plate. The top of the upper flow channel plate is provided with an inlet (351) communicating with the first flow channel. Both the upper flow channel plate and the lower flow channel plate are provided with an outlet (352) communicating with the first flow channel.

4. A creep-resistant composite engine mount based on a spring-compensated structure according to any one of claims 1-3, characterized in that: The main spring has a metal support rib (11) inside.

5. The creep-resistant composite engine mount based on a spring-compensated structure according to claim 4, characterized in that: The cross-section of the supporting rib is an arc-shaped surface.

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