Double-rubber hydraulic bushing based on new energy automobile

Abstract

The double-rubber hydraulic bushing based on the new energy automobile comprises an inner pipe and an outer pipe, and a first liquid cavity and a second liquid cavity are horizontally formed between the inner pipe and the outer pipe; the device further comprises a runner plate, and an inertia channel is formed in the runner plate. According to the double-rubber hydraulic bushing based on the new energy automobile, the damping and noise reduction functions are added through the main spring rubber and the first rubber, the dynamic-static ratio is reduced through the main spring rubber, transmission of external vibration to an automobile body is reduced, dynamic interference between the hydraulic bushing and parts around the whole automobile is avoided through the first rubber, and the service life of the whole automobile is prolonged. Meanwhile, durability reduction caused by excessive product deformation is avoided, so that the problems of dynamic interference and durability of the hydraulic bushing are avoided, a limiting block is arranged to be matched with first rubber to be used for attenuating and buffering the impact strength when the whole vehicle passes through a rough road surface, buffering and damping of the new energy vehicle are improved, and the service life of the new energy vehicle is prolonged. And the durability and the shock absorption and noise reduction functions of the hydraulic bushing are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic bushings, and in particular to a double-rubber hydraulic bushing for new energy vehicles. Background Art

[0002] From a green and environmental perspective, market demand for new energy vehicles (NEVs) is expected to continue to grow. However, due to range limitations, the weight of batteries in NEVs far exceeds that of engines in traditional fuel vehicles, increasing vehicle weight. Braking energy regeneration in NEVs increases braking loads and torque. Furthermore, due to vehicle manufacturer design factors, larger vehicle sizes, and the use of larger tires, these factors combine to place significantly higher loads on NEV suspension components than on traditional fuel vehicles. To mitigate the intense impact of increased vehicle weight when traversing rough roads and speed bumps, most NEV manufacturers are using electronically controlled shock absorbers and air springs to reduce transient impacts. However, air springs, due to their low lateral stiffness, result in large residual vibration amplitudes during impacts that are slow to converge. Therefore, high-damping hydraulic bushings are required to suppress and attenuate residual vibrations and improve the vehicle's NVH characteristics.

[0003] Traditional single-rubber hydraulic bushings in new energy vehicles cannot take into account and solve both the shock absorption and noise reduction performance and durability performance of the hydraulic bushings at the same time. Usually, in order to meet the durability performance of the hydraulic bushings, the shock absorption and noise reduction performance of the hydraulic bushings have to be sacrificed, thus affecting the NVH performance of the new energy vehicle. The reason is that due to the range problem of new energy vehicles, the size of the battery pack is designed to be relatively large and heavy, occupying most of the space of the new energy vehicle suspension. In addition, due to the reasons of brake energy recovery and body design, the hydraulic bushings are subjected to very large forces. Basically, the load is more than 1.5 times that of traditional fuel vehicles. Due to the limitation of space size, the size of the hydraulic bushings cannot be increased. This causes the rubber on the hydraulic bushing limit block to be easily crushed under the action of the dynamic load of the whole vehicle. After the rubber is crushed, the dynamic deformation of the product increases, which leads to technical problems such as abnormal contact noise, dynamic interference noise and unsatisfactory product durability. Summary of the Invention

[0004] The purpose of the present invention is to provide a double rubber hydraulic bushing based on new energy vehicles to solve the above-mentioned shortcomings in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solution: comprising an inner tube and an outer tube, wherein a first liquid cavity and a second liquid cavity are horizontally arranged between the inner tube and the outer tube; The outer tube further comprises a flow channel plate, wherein the flow channel plate is provided with an inertia channel for connecting a first liquid chamber and a second liquid chamber, wherein the first liquid chamber and the second liquid chamber are filled with a damping fluid, and when an external load is applied to a side of the outer tube close to the first liquid chamber, the damping fluid in the first liquid chamber is squeezed, causing the damping fluid to flow to the second liquid chamber through the inertia channel; It also includes a limit block sleeved on the outside of the inner tube, and the limit block is sealed with a first rubber; It also includes a main spring rubber, which is arranged on the inner wall of the inner tube.

[0006] As a further description of the above technical solution: It also includes an inner skeleton, which is arranged between the main spring rubber and the outer tube and is used to support the outer tube and the main spring rubber.

[0007] As a further description of the above technical solution: The limiting block is arranged as an inclined surface, and a wave protrusion is arranged on the surface of the limiting block.

[0008] As a further description of the above technical solution: The thickness of the first rubber at the contact position with the limit block is set to 2mm-3mm.

[0009] As a further description of the above technical solution: The top and the bottom of the outer tube are both provided with a second rubber.

[0010] As a further description of the above technical solution: The second rubber is provided with a plurality of convex points.

[0011] As a further description of the above technical solution: The main spring rubber has a rubber hardness lower than that of the first rubber.

[0012] As a further description of the above technical solution: A honeycomb nylon grid is arranged inside the main spring rubber.

[0013] In the above technical solution, the double rubber hydraulic bushing based on new energy vehicles provided by the present invention has the following beneficial effects: The present invention increases the shock absorption and noise reduction function by the main spring rubber and the first rubber, reduces the dynamic-static ratio by the main spring rubber, and is beneficial to reducing the transmission of external vibration to the vehicle body. The first rubber avoids dynamic interference between the hydraulic bushing and the surrounding parts of the vehicle, and at the same time avoids excessive deformation of the product resulting in reduced durability, thereby avoiding the problems of dynamic interference and durability of the hydraulic bushing. By setting a limit block to cooperate with the first rubber, the rubber stress and strain are reduced to attenuate and cushion the impact strength of the vehicle when passing through rough roads, increase the buffering and shock absorption of new energy vehicles, greatly improve the durability and shock absorption and noise reduction function of the hydraulic bushing, and increase the service life of the hydraulic bushing.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of a three-dimensional structure provided by an embodiment of the present invention; Figure 2 An exploded diagram provided for an embodiment of the present invention; Figure 3 A schematic diagram of a longitudinal cross-section structure provided by an embodiment of the present invention; Figure 4 The embodiment of the present invention provides Figure 3 The enlarged structural diagram of A shown; Figure 5 A schematic diagram of the enlarged structure of a limit block provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the enlarged structure of the flow channel plate provided in an embodiment of the present invention.

[0017] Description of reference numerals: Outer tube; 2. Inner tube; 3. Main spring rubber; 4. Inner skeleton; 5. Limit block; 51. Wave protrusion; 6. First rubber; 7. Flow channel plate; 71. Inertia channel; 8. Second rubber; 81. Bump; 91. First liquid chamber; 92. Second liquid chamber. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0019] See also Figures 1-6 This embodiment provides a double-rubber hydraulic bushing for new energy vehicles, comprising an inner tube 2 and an outer tube 1, with a first liquid chamber 91 and a second liquid chamber 92 horizontally disposed between the inner tube 2 and the outer tube 1; a flow channel plate 7, on which an inertia channel 71 is formed, which is used to connect the first liquid chamber 91 and the second liquid chamber 92. The first liquid chamber 91 and the second liquid chamber 92 are filled with damping fluid. When the outer tube 1 is subjected to an external load on the side close to the first liquid chamber 91, the damping fluid in the first liquid chamber 91 is squeezed, causing the damping fluid to flow through the inertia channel 71 to the other second liquid chamber 92. During the liquid flow, the liquid overcomes the surface friction of the inertia channel 71, thereby converting the external vibration energy into heat energy and releasing it into the atmosphere, thereby achieving the purpose of shock absorption and noise reduction; and a limit block 5 sleeved on the outside of the inner tube 2, with a first rubber 6 sealed on the outside of the limit block 5. The first rubber prevents dynamic interference between the hydraulic bushing and surrounding components of the vehicle, while also preventing excessive deformation of the product that would reduce durability. Thereby, the problems of dynamic interference and durability of the hydraulic bushing are avoided; it also includes a main spring rubber 3, which is arranged on the inner wall of the inner tube 2, and cushions and isolates external vibrations through elastic deformation. The shock absorption and noise reduction functions are increased by the main spring rubber and the first rubber, and the dynamic-static ratio is reduced by the main spring rubber, which is beneficial to reducing the transmission of external vibrations to the vehicle body, greatly improving the durability and shock absorption and noise reduction functions of the hydraulic bushing, and increasing the service life of the hydraulic bushing.

[0020] In the embodiment further provided by the present invention, it also includes an inner skeleton 4, which is arranged between the main spring rubber 3 and the outer tube 1. It is used to support the outer tube 1 and the main spring rubber 3 to increase the hardness. The inner skeleton 4 is arranged to be hollow on both sides. When the hydraulic bushing is hit, the vibration force is effectively transmitted to the main spring rubber 1, and the vibration force is converted and absorbed by the main spring rubber 1. At the same time, the inner skeleton 4 increases the strength of the outer tube 1, avoids deformation due to force, and improves the force strength of the outer tube 1, thereby ensuring the stability of the hydraulic bushing during use.

[0021] Furthermore, the limit block 5 is set to an inclined surface, and a wave protrusion 51 is provided on the surface of the limit block 5. The limit block 5 is set to an inclined surface with a deflection of 2 degrees to resist the large load at a deflection angle of 2 degrees. The surface of the limit block 5 adopts a wave protrusion 51 design with a protrusion height of 1 mm, which increases the contact area and reduces rubber stress and strain, reduces the load and torque of the vehicle braking, and reduces the strong impact on the vehicle when encountering rough roads and speed bumps.

[0022] Furthermore, the thickness of the first rubber 6 at the contact position with the limit block 5 is set to 2mm-3mm. By setting the limit block 5 and the first rubber 6 to cooperate with each other, the stress and strain of the rubber are reduced, so as to attenuate and cushion the impact strength of the entire vehicle when passing through rough roads, thereby increasing the cushioning and shock absorption of new energy vehicles. A rubber crack arrest structure is set at the vulcanization bonding position of the limit block 5 and the first rubber 6, and the rubber wall thickness is designed to be 0.6mm to prevent the cracks from deepening after the rubber cracks.

[0023] In an embodiment further provided by the present invention, second rubbers 8 are provided on the top and bottom of the outer tube 1 to enhance the cushioning and shock-absorbing effect when the outer tube 1 contacts the vehicle body.

[0024] Specifically, a plurality of convex points 81 are provided on the second rubber 8. When the outer tube 1 contacts the vehicle body and is squeezed and deformed, the convex points 81 reduce the squeeze area, thereby effectively preventing the problem of squeeze noise caused by contact.

[0025] In a further solution provided by the present invention, the main spring rubber 3 has a lower hardness than the first rubber 6. The main spring rubber 3 is vulcanized from low-hardness rubber. The use of low-hardness rubber reduces the dynamic-static ratio (the ratio of the product's dynamic stiffness to its static stiffness), which helps reduce the transmission of external vibrations to the vehicle body. The first rubber 6 is vulcanized from high-hardness rubber with excellent pressure resistance, enabling it to bear large loads.

[0026] In the present invention, a honeycomb nylon grid is provided inside the main spring rubber 3, which can still provide a supporting effect when the hydraulic pressure of the hydraulic bushing fails, thereby increasing the practicality of the hydraulic bushing.

[0027] Working principle: The hydraulic bushing is installed on a new energy vehicle. When the new energy vehicle is bumped and vibrates, the main spring rubber 31 first absorbs part of the vibration force, and then the excess force is transmitted to the first liquid chamber and the second liquid chamber. The inner skeleton 4 supports the main spring rubber 3 and the outer tube 1 to prevent the outer tube 1 from deforming. After the main spring rubber 3 absorbs part of the external load; When the remaining external load acts on the first liquid chamber 91, the damping fluid in the first liquid chamber 91 is squeezed and flows into the second liquid chamber 92 through the inertial channel 71 on the flow channel plate 7. During the flow of the damping fluid, the vibration energy is converted and absorbed into heat energy and released, thereby achieving the shock absorption effect of the hydraulic bushing. When the first rubber 6 is squeezed, it will squeeze against the limit block 5. By providing the inclined surface with a 2-degree deflection and the wave protrusion 51, the contact area between the rubber and the limit block 5 is increased, thereby increasing the buffering and shock absorption force, making it have a greater load capacity, and improving the durability of the hydraulic bushing. At the same time, the rubber stress and strain are reduced, reducing the strong impact on the vehicle when the vehicle passes through rough roads and speed bumps, reducing the transient impact of the vehicle, and thus ensuring the stability of the new energy vehicle during driving; The first rubber 6 on the limit block 5 of the hydraulic bushing is prevented from being easily crushed under the action of the dynamic load of the whole vehicle, thereby increasing the service life of the first rubber 6, avoiding the increase in the dynamic deformation of the hydraulic bushing due to the crushing of the first rubber 6, avoiding the abnormal contact noise and dynamic interference noise of the whole vehicle, thereby improving the durability of new energy vehicles, increasing the buffering and shock absorption of new energy vehicles, greatly improving the durability and shock absorption and noise reduction functions of the hydraulic bushing, and increasing the service life of the hydraulic bushing.

[0028] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A double rubber hydraulic bushing for new energy vehicles, comprising an inner tube (2) and an outer tube (1), characterized in that: A first liquid cavity (91) and a second liquid cavity (92) are horizontally arranged between the inner tube (2) and the outer tube (1); The device further comprises a flow channel plate (7), wherein the flow channel plate (7) is provided with an inertia channel (71) for connecting a first liquid chamber (91) and a second liquid chamber (92), wherein the first liquid chamber (91) and the second liquid chamber (92) are filled with a damping liquid, and when the outer tube (1) is subjected to an external load on the side close to the first liquid chamber (91), the damping liquid in the first liquid chamber (91) is squeezed, causing the damping liquid to flow to the other second liquid chamber (92) through the inertia channel (71); It also includes a limit block (5) sleeved on the outside of the inner tube (2), and the limit block (5) is sealed with a first rubber (6). It also includes a main spring rubber (3), which is arranged on the inner wall of the inner tube (2).

2. A double rubber hydraulic bushing based on new energy vehicles according to claim 1, characterized in that: It also includes an inner skeleton (4), which is arranged between the main spring rubber (3) and the outer tube (1) and is used to support the outer tube (1) and the main spring rubber (3).

3. The double rubber hydraulic bushing for new energy vehicles according to claim 1, characterized in that: The limiting block (5) is configured as an inclined surface, and a wave protrusion (51) is provided on the surface of the limiting block (5) to increase the contact area between the limiting block (5) and the first rubber (6).

4. The double rubber hydraulic bushing for new energy vehicles according to claim 1, characterized in that: The thickness of the first rubber (6) at the contact position with the limit block (5) is set to 2mm-3mm.

5. The double rubber hydraulic bushing for new energy vehicles according to claim 1, characterized in that: The top and bottom of the outer tube (1) are both provided with a second rubber (8).

6. The double rubber hydraulic bushing for new energy vehicles according to claim 5, characterized in that: A plurality of protrusions (81) are provided on the second rubber (8) to reduce the extrusion area of the second rubber (8).

7. The double rubber hydraulic bushing for new energy vehicles according to claim 1, characterized in that: The rubber hardness of the main spring rubber (3) is lower than the rubber hardness of the first rubber (6).

8. The double rubber hydraulic bushing for new energy vehicles according to claim 1, characterized in that: A honeycomb nylon grid is provided inside the main spring rubber (3).

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