CN216374094U

CN216374094U - Bushing assembly, control arm and vehicle

Info

Publication number: CN216374094U
Application number: CN202122942321.1U
Authority: CN
Inventors: 余晓伟; 姜利文; 吴凯; 范晓轩
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-26
Anticipated expiration: 2031-11-26
Also published as: WO2023093459A1

Abstract

The embodiment of the application provides a bush subassembly, control arm and vehicle. The application provides a bushing assembly, including inner tube, outer tube, elastic support portion and gasbag. The inner tube is provided with a connecting through hole, and the outer tube is sleeved outside the inner tube and is arranged coaxially with the inner tube. The elastic supporting part is filled between the inner pipe and the outer pipe, and an accommodating space is formed on the elastic supporting part. The air bag is arranged in the accommodating space. The design enables the air bag to bear radial acting force when a vehicle is accelerated or braked, and prevents external load from stretching and wearing the elastic supporting part, so that the durability and the service life of the bushing assembly are improved. In addition, the airbag improves the shock-absorbing effect of the bushing assembly and the comfort of the vehicle.

Description

Bushing assembly, control arm and vehicle

Technical Field

The application relates to the technical field of automobiles, in particular to a bushing assembly, a control arm and a vehicle.

Background

Bushings are important components in vehicle shock absorbing systems and function to connect the control arm of the vehicle to the subframe. During the running process of the vehicle, the bushing needs to bear loads in all directions, so the bushing is easy to wear and fall off under the action of frequent fatigue endurance, and the running safety of the vehicle is affected.

Most of the existing bushings are filled with elastic supporting parts (such as rubber) for regulating and controlling the rigidity of the bushings in all directions, so that good vibration isolation and noise reduction effects are achieved, but the elastic supporting parts are easy to age and wear and have limited service life. Therefore, how to improve the durability and the service life of the bushing becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a bushing assembly, a control arm, and a vehicle, which can improve durability and a service life of the bushing assembly.

In a first aspect, the present application provides a bushing assembly including an inner tube, an outer tube, a resilient support, and an air bladder. The inner tube is provided with a connecting through hole, and the outer tube is sleeved outside the inner tube and is arranged coaxially with the inner tube. The elastic supporting part is filled between the inner pipe and the outer pipe, and an accommodating space is formed on the elastic supporting part. The air bag is arranged in the accommodating space.

In the technical scheme of this application embodiment, arrange the gasbag in the elastic support portion of bush subassembly, such design makes when the vehicle accelerates or brakies, and the gasbag can bear radial effort, avoids external load to the tensile and the wearing and tearing of elastic support portion, and then has improved the durability and the life of bush subassembly. In addition, the airbag improves the shock-absorbing effect of the bushing assembly and the comfort of the vehicle.

In some embodiments, the air bag is a plurality of air bags, and is symmetrically arranged relative to the axis along the first direction. The first direction is perpendicular to the axis. The air bags which are symmetrically arranged can uniformly bear external loads, and the damping and noise reduction effects are improved.

In some embodiments, the accommodating space is a cavity formed between the elastic support and the outer tube, and the cavity penetrates through the elastic support along a direction parallel to the axis. The air bag is arranged in the cavity, and a gap is formed between the air bag and the inner wall of the cavity. Through setting up the gasbag in the cavity, can avoid the gasbag direct and external environment to contact, prevent that the gasbag from being destroyed. In addition, the existence of clearance provides certain inflation space for the gasbag, has prolonged the life of gasbag.

In some embodiments, the balloon includes a first wall adjacent the outer tube and a second wall adjacent the inner tube, both the first wall and the second wall being arcuate and convex toward the inner tube. The arc structure of gasbag is convenient for improve the atress condition of gasbag for the atress direction of gasbag and the edge of gasbag are in the vertical state, therefore the gasbag can absorb the external load better, thereby has improved vibration/noise reduction effect.

In some embodiments, the interior of the balloon is filled with a compressed gas such that the pressure inside the balloon is greater than or equal to a preset threshold. The filling amount of the compressed gas in the air bag is set according to the preset air pressure threshold, so that various different rigidities can be provided for the lining assembly, and the practical application range is wider.

In some embodiments, the bushing assembly further comprises at least two first stiffeners. At least two first reinforcing parts are symmetrically arranged in the elastic supporting part between the air bag and the inner tube along the first direction. The rigidity of the bushing assembly is improved by the first reinforcing piece, so that the bushing assembly cannot be seriously deformed under the condition of overlarge external load.

In some implementations, the first stiffener is flat and perpendicular to the first direction. The flat structure is suitable for the structure and the practical application scene of the lining assembly, and can uniformly increase the rigidity of the area between the air bag and the inner tube. In addition, the flat first reinforcing member can effectively avoid the air bag, and the air bag cannot be damaged.

In some embodiments, the bushing assembly further comprises at least two second stiffeners. At least two second reinforcing parts are symmetrically arranged in the elastic supporting part between the outer pipe and the inner pipe along the second direction. The second direction is perpendicular to the first direction and the axis. The rigidity of the bushing assembly is improved by the second reinforcing piece, so that the bushing assembly cannot be seriously deformed under the condition of overlarge external load.

In some embodiments, the second stiffener is arcuate and projects away from the inner tube. The arc-shaped structure is suitable for the structure and practical application scene of the lining assembly, and the rigidity of the area between the outer pipe and the inner pipe can be uniformly increased.

In some embodiments, in the second direction, the bushing assembly further comprises symmetrically disposed grooves. A groove is recessed inwardly from the outer tube and extends to the resilient support portion, the groove extending through the bushing assembly in a direction parallel to the axis. The bush subassembly is at the pressure equipment in-process, and compression deformation can take place for the outer tube, and the design of recess provides the deformation space for the outer tube, the installation of the bush subassembly of being convenient for.

In some embodiments, the outer tube comprises a first half-tube and a second half-tube, the first half-tube and the second half-tube separated at the groove. The split structure is convenient for the processing and the manufacturing of the outer pipe, and the production efficiency is improved.

In some embodiments, the bladder, the first stiffener, and the second stiffener are all vulcanized and integrally molded with the resilient support. The elastic supporting part bonds the air bag, the first reinforcing part and the second reinforcing part together through vulcanization, and the whole manufacturing process is simple in process and high in production efficiency.

In a second aspect, the present application provides a control arm comprising a bushing assembly as in any of the embodiments described above, the bushing assembly being disposed within a control arm body.

In a third aspect, the present application provides a vehicle comprising the control arm of the above embodiment.

In the bush component that this application provided, realized the rigidity of bush component adjustable through setting up gasbag and reinforcement. The damping and noise reduction effect of the vehicle is guaranteed, and meanwhile the endurance fatigue and the service life of the bushing assembly are improved. Specifically, the plurality of air bags are symmetrically arranged in front and back in the direction parallel to the running direction of the vehicle, and can uniformly bear radial force during the acceleration and braking of the vehicle. Furthermore, the arc-shaped structure of the air bag enables the stress direction of the air bag to be perpendicular to the edge of the air bag, and the excessive stretching of the air bag is effectively avoided. A gap is arranged between the air bag and the inner wall of the cavity, and a certain expansion space is provided for the air bag. In addition, the provision of the first reinforcement and the second reinforcement in the bushing assembly increases the rigidity of the bushing assembly so that the bushing assembly is not severely deformed in the event of an excessive external load. The bushing assembly is high in durability and service life, good in damping and noise reducing effects, simple in structure and low in manufacturing cost. In addition, because the air pressure in the air bag can be preset, various different rigidities can be provided, and the application range is wide.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any creative effort.

FIG. 1 is a schematic illustration of a bushing assembly according to an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 5 is an assembled schematic view of a bushing assembly as disclosed in an embodiment of the present application.

In the drawings, the drawings are not necessarily to scale.

Description of the labeling:

100-a bushing assembly; 200-a control arm;

1-inner tube; 11-connecting vias;

2-an outer tube; 21-a groove; 22-a first half-pipe; 23-a second half-pipe;

3-an elastic support; 31-an accommodating space; 31 a-a cavity; 32-gap;

4-air bag; 41-a first wall; 42-a second wall;

5-a first reinforcement;

6-a second reinforcement;

x-a first direction; y-a second direction; z-axial direction.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, from the development of market situation, the requirement on the comfort of the vehicle is higher and higher. The bush is an important part in a vehicle damping system, and has the function of realizing the elastic connection between the vehicle control arm and the auxiliary frame, so that the connection part between the control arm and the auxiliary frame can not be seriously abraded. And the bushing is capable of conducting forces and moments between the wheel and the vehicle body. During the running of the vehicle, the bush mainly bears the acting force during the acceleration and braking, and needs to generate the torsional moment and the yawing moment along with the movement of the control arm. Existing bushings typically include an outer tube, an inner tube, and a resilient support (e.g., rubber). The elastic support part is filled between the inner pipe and the outer pipe, and the elastic modulus of the elastic support part is smaller than that of metal, so that the vibration isolation and noise reduction performance can be improved. In addition, the elastic supporting part is firmly combined with the metal inner pipe and the metal outer pipe through vulcanization, so that the elastic supporting part can bear multidirectional loads. However, the elastic support portion is susceptible to aging and wear under frequent fatigue durability, and may come off in extreme cases. The aging failure of the elastic supporting part not only reduces the damping and noise reduction effects of the bushing, but also influences the driving safety of the vehicle.

The applicant has noted that the prior art alleviates the problem of ageing failure by optimising the composition of the resilient support, improving the structure of the bushing. For example, a hydraulic mechanism is added in the bushing to reduce the usage amount of the elastic supporting part and achieve good damping and noise reduction effects. However, most of the hydraulic bushings have complex structures and high production cost, and are only used in high-grade cars at present. In addition, because the hydraulic pressure mechanism wraps up in elastic support portion mostly, can damage elastic support portion when hydraulic fluid takes place to leak, reduced the life of bush, consequently can not effectively solve the poor problem of current bush durability.

Based on the above consideration, the applicant has conducted extensive research and has designed a bushing assembly, in which at least one closed air bag is disposed in an elastic support portion of the bushing assembly, so that when the bushing assembly is subjected to external impact, the air bag can bear most of the external load, and the external load required to be borne by the elastic support portion is effectively reduced, thereby improving the durability and the service life of the bushing assembly. In addition, the damping and noise reduction effect of the bushing assembly is good, and the manufacturing cost is low.

In vehicles, the control arm is generally longitudinally disposed, and in the bushing assembly of the present application, the air bags are symmetrically arranged in front and rear directions in a direction parallel to the traveling direction of the vehicle, so that radial forces during acceleration and braking of the vehicle can be uniformly received. In addition, the special arc structure of gasbag for the stress direction of gasbag is in the vertical state with the edge of gasbag, has effectively avoided the tensile deformation of gasbag. The applicant has noted that the air-bag expands when compressed, and therefore a gap is provided at the junction of the air-bag and the resilient support portion, providing a certain expansion space for the air-bag. On the other hand, in order to improve the rigidity of the bushing assembly, a first reinforcement and a second reinforcement are provided in the elastic support portion. Thus, when the bushing assembly is subjected to external load, the elastic supporting part and the air bag form elastic buffering, and the existence of the first reinforcing piece and the second reinforcing piece enables the bushing assembly not to be seriously deformed.

Such a bushing assembly enables a resilient connection between the control arm and the subframe. The bladder and reinforcement embedded in the flexible support portion cooperate to regulate the stiffness of the bushing assembly, thereby improving its durability and service life. The bushing assembly is simple in structure, low in manufacturing cost and good in damping and noise reducing effects. In addition, the air pressure in the air bag can be regulated and controlled by changing the filling amount of the compressed air, so that various different rigidities can be provided, different requirements can be met, and the application range is wider.

The bushing assembly disclosed in the embodiment of the application can be applied to connection of a control arm and a subframe of a vehicle, but is not limited to the connection.

Referring to fig. 1, and fig. 2-5, fig. 2, 3, and 4 are cross-sectional views of a bushing assembly 100 from different angles, and fig. 5 is an assembly view of the bushing assembly 100, according to some embodiments of the present application. The present application provides a bushing assembly 100 including an inner tube 1, an outer tube 2, an elastic support 3, and an airbag 4. The inner tube 1 is provided with a connecting through hole 11, and the outer tube 2 is sleeved outside the inner tube 1 and is coaxially arranged with the inner tube 1. The elastic support portion 3 is filled between the inner tube 1 and the outer tube 2, and an accommodating space 31 is formed on the elastic support portion 3. The airbag 4 is disposed in the accommodating space 31.

As shown in the figure, the X direction is a first direction, the Y direction is a second direction, and the Z direction is an axial direction.

The bushing assembly 100 is a kit for use outside of a machine component for sealing, wear protection, and the like. In the moving parts, because the parts are worn due to long-term friction, the parts must be replaced when the clearance between the shaft and the hole is worn to a certain degree, so that the bushing assembly 100 is made of a material with lower hardness and better wear resistance, the wear of the shaft and the seat (namely, two parts moving relative to each other) can be reduced, and the cost for replacing the shaft and the seat can be saved when the bushing assembly 100 is worn to a certain degree for replacement. Generally, the bushing assembly 100 employs an interference fit with the seat and a clearance fit with the shaft. The use of the bushing assembly 100 reduces wear, vibration and noise of the equipment and has an anti-corrosion effect. The use of the bushing assembly 100 also facilitates maintenance of the mechanical equipment, simplifying the construction and manufacturing process of the equipment. The material of the bushing assembly 100 is mostly soft metal, rubber, nylon, non-metal polymer, etc., and these materials are relatively soft and low in cost.

Further, in the automotive field, the bushing assembly 100 is an important component of a vehicle shock absorbing system, and functions to connect two components that move relative to each other, ensuring that their connection does not wear significantly. The bushing assembly 100 not only needs to satisfy the dynamic and static strength characteristics of common parts of the vehicle, such as triaxial and torsional strength, but also needs to have appropriate dynamic stiffness under different frequencies and amplitude states to satisfy the damping requirements of energy absorption and energy transmission delay. The bushing assembly 100 generally includes an inner tube 1, an outer tube 2, and a resilient support 3 disposed between the inner tube 1 and the outer tube 2. During operation of the vehicle, external loads are transmitted to the control arm 200, then to the bushing assembly 100, and finally to the subframe through the wheel at the outside of the bushing assembly 100, with the force being transmitted in a horizontal direction. Inside the bushing assembly 100, the force is conducted in both radial and circumferential directions.

The inner tube 1 is a cylindrical structure provided with a connecting through hole 11, and the inner tube 1 and the elastic support part 3 and/or the outer tube 2 have a certain height difference. The inner pipe 1 may be made of a metal material such as steel, aluminum alloy, and the like. The connecting through hole 11 is disposed at a central position of the inner tube 1 and axially penetrates the inner tube 1, and the shape of the connecting through hole 11 is determined according to the outer contour of the component to which the connecting through hole 11 is connected, and exemplarily, as shown in fig. 1, the connecting through hole 11 is hexagonal.

The outer tube 2 is of a cylindrical structure provided with an axial through hole, and accommodates the inner tube 1, the elastic support portion 3, and the air bag 4 therein. The outer tube 2 may be made of a metal material such as steel, aluminum alloy, and the like.

By "coaxially arranged" is meant that the axes of the inner tube 1 and the outer tube 2 coincide. The axis of the inner tube 1 refers to a straight line passing through the geometric center of the inner tube 1 and extending in the direction of the tip and tail of the tube. Similarly, the axis of the outer tube 2 can be understood as a straight line passing through the geometric center of the outer tube 2 and extending in the direction of the tip and tail of the tube.

The elastic support portion 3 is a high elastic polymer material having reversible deformation, is elastic at room temperature, can generate large deformation under the action of small external force, and can recover the original shape after the external force is removed. The elastic support portion 3 may be made of natural rubber or general purpose rubber or the like. Because the elastic modulus of the elastic supporting part 3 is smaller than that of metal, the vibration isolation and noise reduction effects are obvious. The shape of the elastic support part 3 is not limited, and the rigidity in each direction can be controlled within a certain range, so that the bushing assembly 100 can bear multidirectional external load, the structure is simplified, and the whole vehicle mass is reduced.

The accommodating space 31 is an accommodating portion formed inside the elastic support portion 3, and the size, shape and position of the accommodating space 31 are determined according to the accommodated airbag 4, which is not limited in the present application. In some embodiments, the accommodating space 31 may penetrate the elastic support portion 3 in the axial direction of the bush assembly; in other embodiments, the accommodating space 31 does not penetrate through the elastic support 3, which is not limited in this application.

The air bag 4 is a closed bag body containing compressed gas therein and can deform when being squeezed. To accommodate the use environment of the liner assembly 100 and to facilitate sealing, the bladder 4 may be made of a composite material. For example, a functional composite film or a packaging material comprising an outer protective layer and an inner sealing layer may be used. Wherein the outer protective layer is a corrosion-resistant and friction-resistant material, which can be adapted to the actual stress conditions of the bushing assembly 100. For example, the outer protective layer may be aluminum, teflon, acryl, polypropylene, or the like. The inner sealing layer may be, for example, a thermoplastic polyester film or coating such as polypropylene, polyvinyl chloride, polystyrene, acrylic, polycarbonate, polytetrafluoroethylene, polyurethane, or the like, which is conveniently encapsulated by a heat sealing process. The number of the air bags 4 may be plural, and exemplarily, referring to fig. 1, the number of the air bags 4 is two.

In the technical scheme of the embodiment of the application, the air bags 4 are arranged in the elastic supporting part 3 of the bushing assembly 100, so that when a vehicle is accelerated or braked, the air bags 4 can uniformly bear radial acting force, the stretching and abrasion of the elastic supporting part 3 caused by external load are avoided, and the durability and the service life of the bushing assembly 100 are further improved. In addition, the airbag 4 improves the shock absorbing effect of the bushing assembly 100 and the comfort of the vehicle.

According to some embodiments of the present application, referring to fig. 2 and 4, the air bag is plural, and is symmetrically disposed with respect to the axis in the first direction. The first direction is perpendicular to the axis. The air bags which are symmetrically arranged can uniformly bear external loads, and the damping and noise reduction effects are improved.

The plurality of airbags 4 are isolated from each other and independently provided. The installation positions of the plural air bags 4 are such that the rigidity of the liner assembly 100 is uniform in the symmetrical direction. Illustratively, referring to fig. 4, two air bags 4 are symmetrically arranged on both sides of the bushing assembly 100 with respect to the Z direction (i.e., axial direction) in the X direction (i.e., first direction), while each air bag 4 is bilaterally symmetric in the Y direction (i.e., second direction).

In the technical scheme of this application embodiment, the gasbag 4 of symmetry setting can bear external load uniformly, improves vibration/noise reduction effect.

According to some embodiments of the present application, referring to fig. 4, the accommodating space 31 is a cavity 31a formed between the elastic support 3 and the outer tube 2, the cavity 31a penetrating the elastic support 3 in a direction parallel to the axis. The airbag 4 is disposed in the cavity 31a, and a gap 32 is formed between the airbag 4 and an inner wall of the cavity 31 a.

The cavity 31a refers to a closed or semi-closed space formed between the elastic support 3 and the outer tube 2. The size, shape and position of the cavity 31a are determined according to the accommodated airbag 4, which is not limited in the present application.

The gap 32 is a narrow space existing between the airbag 4 and the inner wall of the cavity 31 a. The size of the gap 32 can be estimated based on the amount of expansion of the bladder 4 under compression. The position and shape of the gap 32 may be determined according to the practical application requirements of the airbag 4, and the application is not limited thereto.

In the technical scheme of this application embodiment, set up in cavity 31a through gasbag 4, can avoid gasbag 4 direct and external environment to contact, prevent that gasbag 4 from being destroyed. In addition, the existence of the gap 32 provides a certain expansion space for the airbag 4, and prolongs the service life of the airbag 4.

According to some embodiments of the present application, referring to fig. 4, the balloon 4 comprises a first wall 41 adjacent to the outer tube 2 and a second wall 42 adjacent to the inner tube 1, the first wall 41 and the second wall 42 each being arc-shaped and protruding towards the inner tube 1.

The profile of the air bag 4 is arc-shaped, and the design is convenient for improving the stress condition of the air bag 4. Specifically, on the one hand, the deformation of the elastic support 3 is inwardly contracted, and the arcuate structure of the first wall 41 facilitates to withstand the inwardly contracting force. On the other hand, the external load transmitted by the inner tube 1 is expanded outwards, and the stress direction of the air bag 4 is vertical to the edge contour of the air bag 4 due to the arc-shaped structure of the second wall 42, so that the air bag 4 is prevented from being torn and damaged by the excessive external load.

Further, by selecting the airbags 4 with different arc structures, for example, by adjusting the arc of the protruding portion of the airbag 4, the radial stiffness, the axial stiffness, and the yaw stiffness of the bushing assembly 100 can be adjusted, so that the bushing assembly 100 can adapt to different stiffness requirements.

In the technical scheme of this application embodiment, the arc structure of gasbag 4 is convenient for improve the atress condition of gasbag 4 for the atress direction of gasbag 4 is in the vertical state with the edge of gasbag 4, therefore gasbag 4 can absorb the external load better, thereby has improved vibration/noise reduction effect.

According to some embodiments of the present application, referring to fig. 2, the inside of the airbag 4 is filled with a compressed gas such that the pressure inside the airbag 4 is greater than or equal to a preset threshold value.

Compressed gas refers to a gas that is completely gaseous when pressurized at-50 ℃, including gases having a critical temperature less than or equal to-50 ℃, such as compressed air. Different pressure requirements inside the airbag 4 are achieved by regulating the filling amount of the compressed gas. For example, increasing the pressure inside the airbag 4 by increasing the filling amount of the compressed gas can be used in some scenes with a large external load.

Further, the preset threshold refers to a minimum filling amount of the compressed gas determined according to a practical application scenario of the liner assembly 100. When the filling amount satisfies the preset threshold, the internal pressure of the bladder 4 satisfies the requirement that the liner assembly 100 normally operates.

In the technical scheme of this application embodiment, the filling volume of compressed gas in the gasbag 4 sets up according to predetermined atmospheric pressure threshold value, consequently can provide multiple different rigidity for bush subassembly 100, and practical application scope is wider.

According to some embodiments of the present application, referring to fig. 2 and 4, the bushing assembly 100 further comprises at least two first stiffeners 5. At least two first reinforcements 5 are symmetrically arranged in the elastic support portion 3 between the airbag 4 and the inner tube 1 in the first direction.

As shown in the figure, the X direction in the figure is the first direction.

The first reinforcement 5 is provided between the bottom of the airbag 4 and the inner tube 1 for reinforcing the rigidity of the corresponding weak area of the bushing assembly 100. The first reinforcing member 5 may be made of a metal material such as steel, aluminum alloy, or the like. The number of the first reinforcing members 5 is set according to actual requirements, and the application is not limited thereto. Exemplarily, referring to fig. 4, the first reinforcing members 5 are two. In order to ensure uniformity of rigidity of the bushing assembly 100, two first reinforcing members 5 are symmetrically disposed in the first direction.

In the technical scheme of the embodiment of the application, the rigidity of the bushing assembly 100 is improved by arranging the first reinforcing member 5, so that the bushing assembly 100 is not seriously deformed under the condition of overlarge external load.

According to some embodiments of the present application, referring to fig. 4, the first reinforcing member 5 has a flat plate shape perpendicular to the first direction.

In a vehicle in which the bush assembly 100 is generally vertically disposed and the first reinforcing member 5 is disposed at a position perpendicular to the running direction of the vehicle, the first reinforcing member 5 having a flat plate shape is advantageous in withstanding a horizontal force, i.e., a force in the front-rear direction, during acceleration and braking of the vehicle, thereby preventing the bush assembly 100 from being deformed in the horizontal direction.

In the technical solution of the embodiment of the present application, the flat plate-like structure of the first reinforcing member 5 is adapted to the structure and the actual application scenario of the bushing assembly 100, and the rigidity of the area between the airbag 4 and the inner tube 1 can be uniformly increased. Further, the flat plate-shaped first reinforcement 5 can effectively avoid the airbag 4 without damaging the airbag 4.

According to some embodiments of the present application, referring to fig. 3 and 4, the bushing assembly 100 further comprises at least two second stiffeners 6. At least two second reinforcements 6 are symmetrically arranged in the second direction in the elastic support 3 between the outer tube 2 and the inner tube 1. The second direction is perpendicular to the first direction and the axis.

The second reinforcement 6 is disposed between the inner pipe 1 and the outer pipe 2 for enhancing rigidity of the corresponding region of the bushing assembly 100. The second reinforcing member 6 may be made of a metal material such as steel, aluminum alloy, or the like. The number of the second reinforcing members 6 is set according to actual requirements, and the application is not limited thereto. Exemplarily, referring to fig. 4, the second reinforcement members 6 are four. In order to ensure uniformity of rigidity of the bushing assembly 100, a plurality of second reinforcing members 6 are symmetrically arranged in the second direction.

In the technical scheme of the embodiment of the application, the rigidity of the bushing assembly 100 is improved by arranging the second reinforcing member 6, so that the bushing assembly 100 is not seriously deformed under the condition of overlarge external load.

According to some embodiments of the present application, referring to fig. 4, the second stiffener 6 is arc-shaped and protrudes away from the inner tube 1.

The radial and circumferential rigidity of the bushing assembly 100 is increased by the arc-shaped second reinforcing member 6, which is beneficial to bearing the radial force and the circumferential force applied to the vehicle in the running process, so that the elastic supporting part 3 is not deflected too much when being subjected to larger torsion, and the tearing of the elastic supporting part 3 is effectively avoided. The curvature of the second reinforcing member 6 is determined according to the practical application requirement, and the application does not limit the curvature.

In the technical solution of the embodiment of the present application, the arc-shaped structure of the second reinforcement member 6 is adapted to the structure and practical application scenario of the bushing assembly 100, and the rigidity of the region between the outer pipe 2 and the inner pipe 1 can be uniformly increased.

According to some embodiments of the present application, referring to fig. 1, 2 and 4, in the second orientation, the bushing assembly 100 further comprises symmetrically arranged grooves 21. A groove 21 is recessed inward from the outer tube 2 and extends to the elastic support portion 3, and the groove 21 penetrates the bush assembly 100 in a direction parallel to the axis.

The bush assembly 100 is fixed by press fitting, and the outer tube 2 is generally made of soft metal, so that the bush assembly 100 is somewhat compressed and deformed during the assembly process. By providing the groove 21, a certain deformation space is provided for the outer tube 2, facilitating assembly. The shape and size of the groove 21 are set according to actual requirements, and exemplarily, referring to fig. 1, the groove 21 is U-shaped. Referring to fig. 5, after assembly is complete, the recess 21 is closed and the bushing assembly 100 is securely mounted within the control arm. Further, the groove 21 is provided in the second direction, which enables avoidance of the airbag 4, providing a larger installation space for the airbag 4.

In the technical scheme of the embodiment of the application, the outer pipe 2 is compressed and deformed in the press fitting process of the bushing assembly 100, and the design of the groove 21 provides a deformation space for the outer pipe 2, so that the bushing assembly 100 is convenient to mount.

According to some embodiments of the present application, referring to fig. 2, the outer tube 2 comprises a first tube half 22 and a second tube half 23, the first tube half 22 and the second tube half 23 being separated at the groove 21.

In the technical scheme of this application embodiment, the split type structure of outer tube 2 is convenient for the manufacturing of outer tube 2, has improved production efficiency.

According to some embodiments of the present application, referring to fig. 1 to 4, the airbag 4, the first reinforcement 5, and the second reinforcement 6 are all integrally vulcanized with the elastic support 3.

The elastic support portion 3 is generally made of rubber, and vulcanization of the rubber is a process of adding a crosslinking aid such as a vulcanizing agent and an accelerator to raw rubber and converting linear macromolecules into a three-dimensional network structure under certain temperature and pressure conditions. The vulcanized rubber has the advantages of no stickiness, difficult fracture, high elasticity, high heat resistance, high tensile strength, high insolubility in organic solvents and the like. The elastic support portion 3 is easily vulcanized and cross-linked by the first reinforcement 5 and the second reinforcement 6 made of metal and the airbag 4 made of metal or plastic, and the bushing assembly 100 is integrally molded.

In the technical scheme of this application embodiment, the elastic support portion 3 bonds gasbag 4, first reinforcement 5 and second reinforcement 6 together through vulcanizing, and whole manufacturing process simple process, production efficiency is high.

According to some embodiments of the present application, referring to fig. 1 to 5, the present application provides a bushing assembly 100, and referring to fig. 5, when the bushing assembly 100 is press-fitted to the control arm 200, the groove 21 of the outer tube 2 is closed, and the outer tube 2 is tightly fitted to the control arm 200. During the running process of the vehicle, the horizontal acting force applied to the wheels during the acceleration and braking process is transmitted to the vehicle body through the control arm 200, the bush assembly 100 and the auxiliary frame in sequence. Because the airbags 4 are arranged in the front and back direction along the running direction of the vehicle, external load in the horizontal direction can be absorbed, and the damping and noise reduction effects are improved. And the arrangement of the air bag 4 buffers the external load applied to the elastic supporting part 3, prevents the elastic supporting part 3 from tensile deformation, and prolongs the service life of the bushing assembly 100. The bladder 4 is curved to accommodate forces in different directions on the bushing assembly 100. In addition, a gap 32 is provided at the junction of the airbag 4 and the elastic support portion 3, providing a certain expansion space for the airbag 4. On the other hand, the movement of the control arm 200 itself generates a torsional moment and a yawing moment, which are also transmitted to the bushing assembly 100. Four arc-shaped second reinforcing members 6 are provided to increase the radial and circumferential rigidity of the bush assembly 100, avoiding tearing of the elastic support portion 3 due to excessive torsional force. Further, two first reinforcing members 5 in the form of flat plates are provided at the bottom of the airbag 4 to increase the rigidity of the weak area. The internal pressure of the airbag 4 can be adjusted by the filling amount of the compressed gas, and thus, can be applied to various liner assemblies 100, satisfying the generalized application requirements.

According to some embodiments of the present application, referring to fig. 5, the present application provides a control arm 200 comprising the bushing assembly 100 of any of the above embodiments, disposed within the body of the control arm 100.

According to some embodiments of the present application, there is provided a vehicle comprising the control arm 200 of the above embodiments.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A bushing assembly, comprising:

an inner tube provided with a connecting through hole;

the outer pipe is sleeved outside the inner pipe and is arranged coaxially with the inner pipe;

an elastic support part filled between the inner tube and the outer tube; an accommodating space is formed on the elastic supporting part;

and the air bag is arranged in the accommodating space.

2. The bushing assembly of claim 1 wherein said air pockets are plural and are symmetrically disposed about said axis in a first direction, said first direction being perpendicular to said axis.

3. A bush assembly according to claim 1 or 2, wherein the housing space is a cavity formed between the resilient support and the outer tube, the cavity penetrating the resilient support in a direction parallel to the axis; the air bag is arranged in the cavity, and a gap is formed between the air bag and the inner wall of the cavity.

4. A bushing assembly in accordance with claim 1 or 2, wherein said bladder comprises a first wall adjacent said outer tube and a second wall adjacent said inner tube, said first and second walls each being arcuate and projecting in a direction toward said inner tube.

5. A liner assembly according to claim 1 or 2, wherein the interior of the bladder is filled with a compressed gas, the pressure of the compressed gas being greater than or equal to a preset threshold.

6. The bushing assembly of claim 2, further comprising at least two first stiffeners; at least two first reinforcing parts are symmetrically arranged in the elastic supporting part between the air bag and the inner tube along the first direction.

7. The bushing assembly of claim 6, wherein said first stiffener is flat and perpendicular to said first direction.

8. The bushing assembly of claim 7, further comprising at least two second stiffeners; at least two second reinforcing parts are symmetrically arranged in the elastic supporting part between the outer pipe and the inner pipe along a second direction, and the second direction is perpendicular to the first direction and the axis.

9. The bushing assembly of claim 8, wherein said second stiffener is arcuate and projects away from said inner tube.

10. The bushing assembly of claim 8, further comprising symmetrically disposed grooves recessed inwardly from said outer tube and extending to said resilient support in said second direction; the groove extends through the bushing assembly in a direction parallel to the axis.

11. The bushing assembly of claim 10, wherein said outer tube comprises a first half-tube and a second half-tube, said first half-tube and said second half-tube being separated at said groove.

12. The bushing assembly of claim 9 wherein said bladder, said first stiffener, said second stiffener, and said resilient support are all vulcanized in one piece.

13. A control arm comprising a control arm body and a bushing assembly of any one of claims 1-12; the bushing assembly is disposed within the control arm body.

14. A vehicle comprising the control arm of claim 13.