Bushing and vehicle

Abstract

The present application relates to a bushing and a vehicle, which includes: a limit plate, an inner frame assembly, a rubber assembly and an outer frame, wherein the inner frame assembly is arranged on the limit plate; the rubber assembly is arranged on the limit plate and is sleeved on the outer peripheral surface of the inner frame assembly, and when the bushing is transformed from the second stage to the third stage, the point contact between the rubber assembly and the limit plate is transformed into surface contact; the outer frame is sleeved on the outer peripheral surface of the rubber assembly, and the bottom end of the outer frame is connected to the surface of the rubber assembly. In the present invention, when the vehicle is subjected to a large load or a large bumpy working condition, the rubber assembly is in progressive contact with the limit plate, the compression stiffness increases smoothly, the force is gentle, and the comfort is improved; and during the contact process, the rubber assembly and the limit plate gradually transition from point contact to surface contact, which can effectively solve the abnormal noise caused by the collision between the rubber assembly and the limit plate or the abnormal noise caused by both contact and relative friction under certain working conditions, especially in low temperature conditions in winter.

Description

Technical Field

[0001] The present application relates to the field of automobile parts, and in particular to a bushing and a vehicle. Background Art

[0002] When the temperature is low in winter, the rubber of the bushing becomes hard. When the vehicle wheels are subjected to great excitation from the road surface, the vehicle fluctuates greatly. The limiting rubber of the bushing is in surface contact with the limiting plate or the mounting parts, which creates the risk of impact and friction noise. This is perceived by customers, affecting the driving experience and damaging the brand value of the car. Summary of the invention

[0003] The present application provides a bushing and a vehicle, which can solve the problem of abnormal noise of bushings on twisted roads in winter in the related art.

[0004] In the first aspect, an embodiment of the present application provides a bushing, which includes: a limit plate, an inner skeleton assembly, a rubber assembly and an outer skeleton, wherein the inner skeleton assembly is arranged on the limit plate; the rubber assembly is arranged on the limit plate and is sleeved on the outer peripheral surface of the inner skeleton assembly, and when the bushing is transformed from the second stage to the third stage, the point contact between the rubber assembly and the limit plate is transformed into surface contact; the outer skeleton is sleeved on the outer peripheral surface of the rubber assembly, and the bottom end of the outer skeleton is connected to the surface of the rubber assembly.

[0005] In some embodiments, the rubber assembly includes: a rubber body, which is a cylindrical structure and is sleeved on the outer circumferential surface of the inner skeleton assembly. The bottom end of the rubber body extends circumferentially away from the center of the rubber body to form an annular structure, and the top end of the annular structure is connected to the bottom end of the outer skeleton.

[0006] In some embodiments, the annular structure includes: a flat end surface and a lower limit rubber, wherein the flat end surface and the lower limit rubber are alternately arranged along the circumference of the rubber body; the lower limit rubber has a second stage and a third stage, when the lower limit rubber is in the second stage, the lower limit rubber is in point contact with the limit plate, and when the lower limit rubber is in the third stage, the lower limit rubber is in surface contact with the limit plate.

[0007] In some embodiments, the middle portion of the lower limit rubber protrudes axially away from the bottom end of the rubber body, so that the bottom end of the lower limit rubber is an arc-shaped structure; the lower limit rubber is also an arc-shaped structure in the radial direction of the rubber body.

[0008] In some embodiments, a plurality of protrusions are provided on the surface of the lower limit rubber.

[0009] In some embodiments, the top of the rubber body extends circumferentially toward one side away from the center of the rubber body, also forming an annular structure; a cavity is provided on the rubber body along the axial direction of the rubber body; the top of the annular structure is a plane, and the width of the annular structure increases along the radial direction at the cavity position; and a plurality of protrusions are also provided on the surface of the annular structure.

[0010] In some embodiments, a clamping claw is provided on the limit plate, a rectangular groove is provided on the inner frame assembly, and the clamping claw is engaged with the rectangular groove; a third flange structure is provided on the limit plate near the edge.

[0011] In some embodiments, the inner skeleton assembly includes: a first inner skeleton and a second inner skeleton, the surface of the first inner skeleton is provided with a concave tooth structure; the second inner skeleton is sleeved on the outer peripheral surface of the first inner skeleton, and the inner wall of the second inner skeleton is provided with a convex tooth structure, and the concave tooth structure is engaged with the convex tooth structure; wherein, the surface of the second inner skeleton is provided with an inner concave structure, and the second inner skeleton is provided with a weight-reducing hole along the axial direction of the second inner skeleton.

[0012] In some embodiments, the top end of the outer frame is bent toward the side close to the inner frame assembly to form a first flange structure, a slot is opened on the rubber assembly along the circumference of the rubber assembly, and the first flange structure is engaged with the slot; the bottom end of the outer frame is bent toward the side away from the inner frame assembly to form a second flange structure, and the bottom end of the second flange structure is in contact with the rubber assembly.

[0013] In a second aspect, a vehicle is provided, comprising: the bushing as described above.

[0014] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0015] The embodiments of the present application provide a bushing and a vehicle. When the vehicle is subjected to a large load or a large bumpy working condition, the rubber assembly and the limit plate are in progressive contact, the compression stiffness increases smoothly, the force is gentle, and the comfort is improved; and during the contact process, the point contact between the rubber assembly and the limit plate gradually transitions to surface contact, which can effectively solve the abnormal noise caused by the impact between the rubber assembly and the limit plate, or the abnormal noise caused by both contact and relative friction under certain working conditions, especially in low temperatures in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1A schematic diagram of the overall structure provided for an embodiment of the present application;

[0018] Figure 2 A schematic cross-sectional view of the overall structure provided by an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the bottom end of the overall structure provided in the embodiment of the present application;

[0020] Figure 4 A schematic diagram of the lower limit rubber structure provided in an embodiment of the present application;

[0021] Figure 5 for Figure 4 Sectional view at AA;

[0022] Figure 6 A schematic diagram of the lower limit rubber structure provided in an embodiment of the present application;

[0023] Figure 7 A schematic diagram of a second inner skeleton provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of a limit plate provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the lower limit rubber arc curve provided in an embodiment of the present application;

[0026] Fig.10 A schematic stiffness curve provided for an embodiment of the present application.

[0027] In the figure: 1, inner frame assembly; 10, first inner frame; 100, round hole; 101, rectangular groove; 102, concave tooth structure; 11, second inner frame; 110, convex tooth structure; 111, concave structure; 112, first weight reduction hole; 113, second weight reduction hole;

[0028] 2. Rubber assembly; 20. Rubber body; 200. Cavity; 21. Upper limit rubber; 22. Lower limit rubber; 23. Spherical convex point structure; 24. Flat end surface;

[0029] 3. Exoskeleton; 30. First flange structure; 31. Second flange structure;

[0030] 4. Limiting plate; 40. Center hole; 41. Clamping claw; 42. Third flange structure. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] See also Figures 1 to 10 The embodiments of the present application provide a bushing and a vehicle, which can solve the problem of abnormal noise of bushing on twisted roads in winter in the related art.

[0033] In winter, when the temperature is low, the rubber of the bushing becomes hard. When the wheels of the vehicle are greatly stimulated by the road surface, the vehicle fluctuates greatly. The limiting rubber of the bushing is in surface contact with the limiting plate 4 or the assembly of the mounting parts, and there is a risk of collision and friction noise; which is perceived by customers, affecting the driving experience and damaging the brand value of the car.

[0034] Aiming at the problem of abnormal noise of bushing on twisted road section in winter. In the first aspect, the embodiment of the present application provides a bushing, which includes: a limit plate 4, an inner frame assembly 1, a rubber assembly 2 and an outer frame 3, wherein the inner frame assembly 1 is arranged on the limit plate 4; the rubber assembly 2 is arranged on the limit plate 4 and sleeved on the outer peripheral surface of the inner frame assembly 1, and when the bushing is transformed from the second stage to the third stage, the point contact between the rubber assembly 2 and the limit plate 4 is transformed into surface contact; the outer frame 3 is sleeved on the outer peripheral surface of the rubber assembly 2, and the bottom end of the outer frame 3 is connected to the surface of the rubber assembly 2.

[0035] In the present application, the inner skeleton assembly 1 and the outer skeleton 3 are vulcanized and formed by the rubber assembly 2, and then installed on the limit plate 4. When the vehicle is subjected to a large load or a large bumpy working condition, the rubber assembly 2 and the limit plate 4 are progressively contacted, the compression stiffness increases smoothly, the force is gentle, and the comfort is improved; and during the contact process, the rubber assembly 2 and the limit plate 4 gradually transition from point contact to surface contact, which can effectively solve the abnormal noise caused by the impact of the rubber assembly 2 and the limit plate 4, or the abnormal noise caused by both contact and relative friction under certain working conditions, especially in low temperatures in winter.

[0036] Among them, the rubber assembly 2 includes: a rubber body 20, which is a cylindrical structure and is sleeved on the outer peripheral surface of the inner skeleton assembly 1. The bottom end of the rubber body 20 extends circumferentially away from the center of the rubber body 20 to form an annular structure, and the top end of the annular structure is connected to the bottom end of the outer skeleton 3.

[0037] The rubber body 20 is sleeved on the outer peripheral surface of the inner frame assembly 1, and the outer frame 3 is sleeved on the outer peripheral surface of the rubber body 20. The diameter of the annular structure is larger than the diameter of the rubber body 20. The bottom end of the annular structure contacts the limit plate 4, and the bottom end of the outer frame 3 fits with the top end of the annular structure.

[0038] The bushing has a normal state and a moving state. In the normal state, there is a gap between the rubber assembly 2 and the limit plate 4. As the force applied to the bushing increases, the bushing changes from the normal state to the moving state.

[0039] The motion state is divided into the first stage, the second stage and the third stage:

[0040] In the first stage, the gap between the rubber assembly 2 and the limiting plate 4 is reduced to the point of being in contact;

[0041] In the second stage, the rubber assembly 2 makes initial contact with the limit plate 4. During this process, the force on the bushing increases and the stiffness increases synchronously. At this time, there is point contact between the rubber assembly 2 and the limit plate 4; the force on the rubber assembly 2 increases significantly in the third stage, the stiffness changes rapidly, and the comfort is relatively poor. At this time, due to the extrusion of the rubber assembly 2, the contact with the limit plate 4 becomes surface contact; when the rubber assembly 2 changes from the second stage to the third stage, the point contact between the rubber assembly 2 and the limit plate 4 gradually transitions to surface contact.

[0042] Specifically, the annular structure includes a flat end surface 24 and a lower limit rubber 22 .

[0043] In some possible embodiments, a circle of rubber flat end surface 24 is completely arranged along the circumferential direction of the annular structure, and two lower limit rubbers 22 are symmetrically arranged on the flat end surface 24 along the length direction of the limit plate 4. The lower limit rubber 22 is radially limited by contacting and compressing the limit plate 4.

[0044] In some other possible embodiments, the flat end faces 24 and the lower limit rubber 22 are alternately arranged along the circumference of the rubber body 20; the flat end faces 24 are symmetrically arranged along the width direction of the limit plate 4, and the lower limit rubber 22 is symmetrically arranged along the length direction of the limit plate 4, and the lower limit rubber 22 is radially limited by contacting and compressing the limit plate 4.

[0045] Therefore, the lower limit rubber 22 has a second stage and a third stage. When the lower limit rubber 22 is in the second stage, the rubber assembly 2 is initially in contact with the limit plate 4, that is, at this time, the lower limit rubber 22 and the limit plate 4 are in point contact; when the lower limit rubber 22 is in the third stage, the force is significantly increased, the lower limit rubber 22 is in a radial compression state, and the lower limit rubber 22 and the limit plate 4 are in surface contact.

[0046] like Figure 4As shown, the middle part of the lower limit rubber 22 protrudes along the axial direction of the rubber body 20 away from the bottom end of the rubber body 20, so that the bottom end of the lower limit rubber 22 is an arc structure. The corresponding curve of the arc structure is shown in FIG. Fig. 9 , the corresponding curve equation is y=(68^2-x^2)^0.5-65. The arc of the lower limit rubber 22 is set to 3mm and the arc width is 40mm. This is the optimal solution based on the overall size of the bushing and the actual verification effect, so that the lower limit rubber 22 can be completely covered by the outer frame 3 and can gradually limit the position, making the limiting process unobtrusive and improving comfort. At the same time, Figure 5 for Figure 4 From the perspective of sectioning from the center of the lower limit rubber 22 at AA in the middle, the lower limit rubber 22 is also an arc-shaped structure in the radial direction of the rubber body 20. The arc-shaped structures in two different directions are combined, and a plurality of protrusions are arranged on the surface of the lower limit rubber 22, and the protrusions are spherical convex point structures 23. When the vehicle is subjected to a large load or a large bumpy working condition, the lower limit rubber 22 is in progressive contact with the limit plate 4, the compression stiffness increases smoothly, the force is gentle, and the comfort is improved. This structure is significantly better than the plane structure and the single curved surface structure; and the contact process gradually transitions from point contact to surface contact, which can effectively solve the abnormal sound caused by the impact of the rubber limit structure and the limit plate 4, or the abnormal sound caused by both contact and relative friction under certain working conditions, especially in winter low temperature conditions; based on the above arc surface structure, the abnormal sound problem is avoided, the user's driving experience is improved, and the brand value is improved.

[0047] Furthermore, the bushing in this application is an optimization solution based on solving the abnormal noise problem of twisted road in winter during the actual development process. There are three technical solutions in the development process:

[0048] Solution 1 is that the lower limit rubber 22 is a planar structure; Solution 2 is that the lower limit rubber 22 is a single arc structure, that is, the middle part of the lower limit rubber 22 protrudes along the axial direction of the rubber body 20 away from the bottom end of the rubber body 20, so that the bottom end of the lower limit rubber 22 is an arc structure, or the lower limit rubber 22 is an arc structure in the radial direction of the rubber body 20; Solution 3 is the double arc structure mentioned above in the present application, that is, the middle part of the lower limit rubber 22 protrudes along the axial direction of the rubber body 20 away from the bottom end of the rubber body 20, so that the bottom end of the lower limit rubber 22 is an arc structure, and at the same time, the lower limit rubber 22 is also an arc structure in the radial direction of the rubber body 20.

[0049] The stiffness curves of the three schemes are shown in Fig.10As shown, line segment d is the common part of the three schemes, corresponding to the process in which the lower limit rubber 22 is not in contact with the limit plate 4 during the downward movement of the bushing, and is a linear segment. Line segments a / b / c correspond to the process in which the lower limit rubber 22 is in contact and compressed with the limit plate 4; line segment a corresponds to scheme 1. The planar structure of the lower limit rubber 22 has a large curvature and is abrupt in the process of contacting the limit plate 4. The rubber compression is small but the force is large. The NVH (noise, vibration and harshness) performance is average, and the comfort is average. This scheme is also the design scheme in the initial stage of the actual development of this application. The actual vehicle has the problem of abnormal noise on twisted roads in winter; line segment b corresponds to scheme 1. In the second scheme, the single-curved lower limit rubber 22 has a moderate curvature in the process of contacting with the limit plate 4, the stiffness gradually increases, the force increases synchronously, the NVH performance is improved compared with the first scheme, and the abnormal noise of twisted road in winter is improved but not eliminated; the c line segment corresponds to the third scheme, the hyperbolic lower limit rubber 22 has a small curvature in the process of contacting with the limit plate 4, the stiffness increases smoothly, the force is gentle, the NVH performance is optimal, and the comfort is the best. At the same time, the contact surface between the lower limit rubber 22 and the limit plate 4 transitions smoothly from point contact to surface contact, and the problem of abnormal noise of twisted road in winter is effectively solved; in summary, the lower limit rubber 22 of the third scheme and the corresponding curve equation are the optimal solutions for the bushing of this size structure.

[0050] Therefore, in the first stage of the bushing, the gap between the lower limit rubber 22 and the limit plate 4 is reduced to the point where they are about to contact each other, corresponding to Fig.10 The common line segment d;

[0051] The second stage: the lower limit rubber 22 contacts the limit plate 4. At this time, the spherical convex point structure 23 on the lower limit rubber 22 is compressed, that is, the point contact mentioned above. In this process, the force will increase and the stiffness will increase synchronously, which corresponds to the front section of the c line segment.

[0052] The third stage: the main curved surface structure of the lower limit rubber 22 contacts the limit plate 4, and the contact area is significantly larger than that in the second stage. The contact with the limit plate 4 changes from point contact to surface contact. The force in this process increases significantly, the stiffness changes rapidly, and the comfort is relatively poor. Corresponding to the middle / rear section of the c line segment, abnormal noise mostly occurs in this stage.

[0053] On the basis of the above embodiment, in this embodiment, the top of the rubber body 20 extends circumferentially to a side away from the center of the rubber body 20, also forming an annular structure. The annular structure is the upper limit rubber 21, and the top of the annular structure is a plane, that is, the top of the upper limit rubber 21 is a plane structure, and is distributed in the circumferential direction of the rubber body 20. The surface of the annular structure is also provided with a plurality of protrusions, that is, a spherical convex point structure 23 is also provided at the top of the upper limit rubber 21, which is evenly distributed.

[0054] Furthermore, along the axial direction of the rubber body 20, a cavity 200 is provided on the rubber body 20. The number of the cavity 200 is determined according to the actual situation, and one, two, or three cavities 200 may be provided. Preferably, in this embodiment, two cavities 200 are provided on the rubber body 20, so that the rubber body 20 forms two structures, solid and hollow, in the radial direction, thereby obtaining two different radial stiffnesses, taking into account both comfort and handling performance.

[0055] Furthermore, the width of the annular structure (upper limit rubber 21) in the radial direction increases at the position of the cavity 200. In the actual vehicle state, the bushing is subjected to the static load of the vehicle weight itself. The upper limit rubber 21 and the mounting surface of the inner frame assembly 1, i.e., the end surface of the vehicle body, are relatively far apart, and there is no relative slippage. Therefore, a large contact area is used as much as possible for limiting the position to prevent the subframe from hitting the bottom of the vehicle body due to the impact under extreme working conditions. The limiting role here is the primary requirement, so a large-area flat structure is the optimal solution.

[0056] In summary, the rubber assembly 2 realizes various structures through a vulcanization process, and the rubber material can be added with self-lubricating material to further optimize the risk of abnormal noise generated between the lower limit rubber 22 and the limit plate 4 and the bushing cavity 200.

[0057] On the basis of the above embodiments, in this embodiment, the inner frame assembly 1 includes: a first inner frame 10 and a second inner frame 11, the second inner frame 11 is sleeved on the outer peripheral surface of the first inner frame 10, the first inner frame 10 and the second inner frame 11 are injection molded together to form the inner frame assembly 1, the first inner frame 10 is made of aluminum alloy, and the second inner frame 11 is made of nylon. The combination of the two materials takes into account the installation, load-bearing and rigidity requirements and lightweight; the center of the first inner frame 10 is provided with a circular hole 100 for bolt installation The first inner frame 10 is made of aluminum alloy and is formed by extrusion process, which is mature and has low manufacturing difficulty. Two rectangular grooves 101 are provided on the inner wall of the center circular hole 100, which cooperate with the limit plate 4 and are used for assembling the limit plate 4. At the same time, the rectangular groove 101 is also a positioning structure for the bushing to be pressed into the subframe, which is used for bushing press-fitting to ensure that the press-fitting angle meets the design requirements, in order to avoid quality problems caused by poor bushing press-fitting angles.

[0058] A concave tooth structure 102 is provided on the surface of the first inner frame 10, and a convex tooth structure 110 is provided on the inner wall of the corresponding second inner frame 11. The two structures are staggered, and the concave tooth structure 102 and the convex tooth structure 110 are engaged with each other to improve the strength and reliability of the inner frame assembly 1;

[0059] Furthermore, the second inner skeleton 11 is symmetrically designed with two concave structures 111 in the solid direction of the rubber assembly 2, which are located in the middle area of ​​the second inner skeleton 11. Correspondingly, a convex structure is provided on the rubber body 20, and the concave structure 111 and the convex structure are connected to increase the contact area between the second inner skeleton 11 and the rubber assembly 2, improve the bonding strength of the bushing, and enhance reliability; at the same time, a plurality of weight-reducing holes are opened on the upper end face and the lower end face of the second inner skeleton 11 along the axial direction of the second inner skeleton 11, and the plurality of weight-reducing holes are distributed along the circumferential direction of the second inner skeleton 11, wherein the weight-reducing holes include a first weight-reducing hole 112 and a second weight-reducing hole 113, wherein the first weight-reducing hole 112 is distributed at the position of the cavity 200 on the rubber body 20, and the first weight-reducing hole 112 is a through-type, passing through the upper end face and the lower end face of the second inner skeleton 11, and the second weight-reducing hole 113 is distributed at the solid position on the rubber body 20, and is a blind hole structure, that is, as Figure 7 As shown, the second weight-reducing hole 113 is open at one end and sealed at the other end, avoiding the concave structure 111 in the middle area of ​​the second inner skeleton 11; the lightweight design is achieved by setting the weight-reducing hole and selecting nylon material to make the second inner skeleton 11;

[0060] On the basis of the above embodiments, in this embodiment, the outer frame 3 is cylindrical as a whole and is made of aluminum alloy. The top of the outer frame 3 is bent toward the side close to the inner frame assembly 1 to form a first flange structure 30. A slot is provided on the rubber assembly 2 along the circumference of the rubber assembly 2. The first flange structure 30 is engaged with the slot to support the upper limit rubber 21 and buffer the impact of the chassis and the body under extreme working conditions. The tail of the first flange structure 30 is designed with a flat area to improve impact reliability.

[0061] The bottom end of the outer frame 3 is bent away from the inner frame assembly 1 to form a second flange structure 31. The bottom end of the second flange structure 31 is in contact with the rubber assembly 2. The second flange structure 31 is used to support the lower limit rubber 22 and is also the installation limit surface of the bushing to prevent the bushing from falling out and improve the reliability of the chassis.

[0062] On the basis of the above embodiment, in this embodiment, the limiting plate 4 is in an oblong shape as a whole, and cooperates with the lower limiting rubber 22 in the length direction to achieve the limiting effect. A center hole 40 is opened at the top of the limiting plate 4, and a claw 41 is provided on the limiting plate 4. The claw 41 is located in the center hole 40 and cooperates with the rectangular groove 101 on the first inner frame 10 to realize the installation of the limiting plate 4 on the inner frame assembly 1.

[0063] Furthermore, a third flange structure 42 is provided near the edge of the limit plate 4, and the third flange structure 42 can improve the strength and rigidity of the limit plate 4, and prevent the limit plate 4 from bending and damage under large load and large displacement conditions; the limit plate 4 is made of metal, and can be steel or aluminum. The material is selected based on the weight of the development vehicle model. Steel is selected for heavy vehicles, and aluminum is selected for light vehicles. Differentiated development takes into account both reliability and lightweight.

[0064] In summary, the bushing can not only be used in the subframe to connect the subframe with the vehicle body, but also can be applied to the control arm to improve the comfort and reliability of the control arm.

[0065] The lower limit rubber 22 adopts a curved surface design, with the assistance of a spherical convex point structure 23. When the vehicle is subjected to a large load or a large bumpy working condition, the lower limit rubber 22 gradually contacts the limit plate 4, and the compression stiffness gradually increases, which improves comfort. In addition, the contact process gradually transitions from point contact to surface contact, which can effectively solve the abnormal noise caused by the impact of the lower limit rubber 22 and the limit plate 4, or the abnormal noise caused by both contact and relative friction under certain working conditions, especially in winter low temperature conditions. Based on the above curved surface structure, the abnormal noise problem is avoided, the user's driving experience is improved, and the brand value is improved.

[0066] The first inner skeleton 10 made of aluminum alloy and the second inner skeleton 11 made of nylon are combined and injection molded together. At the same time, two weight-reducing holes are designed on the second inner skeleton 11 made of nylon, which are used in combination to achieve a lightweight design; the concave tooth structure 102 on the first inner skeleton 10 and the convex tooth structure 110 on the second inner skeleton 11 bite into each other to improve reliability.

[0067] In a second aspect, an embodiment of the present application provides a vehicle, which includes a bushing provided by any of the above embodiments of the present application.

[0068] In the present application, the inner skeleton assembly 1 and the outer skeleton 3 are vulcanized and formed by the rubber assembly 2, and then installed on the limit plate 4. When the vehicle is subjected to a large load or a large bumpy working condition, the rubber assembly 2 and the limit plate 4 are progressively contacted, the compression stiffness increases smoothly, the force is gentle, and the comfort is improved; and during the contact process, the rubber assembly 2 and the limit plate 4 gradually transition from point contact to surface contact, which can effectively solve the abnormal noise caused by the impact of the rubber assembly 2 and the limit plate 4, or the abnormal noise caused by both contact and relative friction under certain working conditions, especially in low temperatures in winter.

[0069] The bushing has a normal state and a moving state. In the normal state, there is a gap between the rubber assembly 2 and the limit plate 4. As the force applied to the bushing increases, the bushing changes from the normal state to the moving state.

[0070] The motion state is divided into the first stage, the second stage and the third stage:

[0071] In the first stage, the gap between the rubber assembly 2 and the limiting plate 4 is reduced to the point of being in contact;

[0072] In the second stage, the rubber assembly 2 makes initial contact with the limit plate 4. During this process, the force on the bushing increases and the stiffness increases synchronously. At this time, there is point contact between the rubber assembly 2 and the limit plate 4; the force on the rubber assembly 2 increases significantly in the third stage, the stiffness changes rapidly, and the comfort is relatively poor. At this time, due to the extrusion of the rubber assembly 2, the contact with the limit plate 4 becomes surface contact; when the rubber assembly 2 changes from the second stage to the third stage, the point contact between the rubber assembly 2 and the limit plate 4 gradually transitions to surface contact.

[0073] Specifically, the annular structure includes a flat end surface 24 and a lower limit rubber 22 .

[0074] like Figure 4 As shown, the middle part of the lower limit rubber 22 protrudes along the axial direction of the rubber body 20 away from the bottom end of the rubber body 20, so that the bottom end of the lower limit rubber 22 is an arc structure. The corresponding curve of the arc structure is shown in FIG. Fig. 9 , the corresponding curve equation is y=(68^2-x^2)^0.5-65. The arc of the lower limit rubber 22 is set to 3mm and the arc width is 40mm. This is the optimal solution based on the overall size of the bushing and the actual verification effect, so that the lower limit rubber 22 can be completely covered by the outer frame 3 and can gradually limit the position, making the limiting process unobtrusive and improving comfort. At the same time, Figure 5 for Figure 4 From the perspective of sectioning from the center of the lower limit rubber 22 at AA in the middle, the lower limit rubber 22 is also an arc-shaped structure in the radial direction of the rubber body 20. The arc-shaped structures in two different directions are combined, and a plurality of protrusions are arranged on the surface of the lower limit rubber 22, and the protrusions are spherical convex point structures 23. When the vehicle is subjected to a large load or a large bumpy working condition, the lower limit rubber 22 is in progressive contact with the limit plate 4, the compression stiffness increases smoothly, the force is gentle, and the comfort is improved. This structure is significantly better than the plane structure and the single curved surface structure; and the contact process gradually transitions from point contact to surface contact, which can effectively solve the abnormal sound caused by the impact of the rubber limit structure and the limit plate 4, or the abnormal sound caused by both contact and relative friction under certain working conditions, especially in winter low temperature conditions; based on the above arc surface structure, the abnormal sound problem is avoided, the user's driving experience is improved, and the brand value is improved.

[0075] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0076] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0077] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A bushing, characterized in that: It includes: Limiting plate (4); An inner frame assembly (1), wherein the inner frame assembly (1) is arranged on a limiting plate (4); A rubber assembly (2), wherein the rubber assembly (2) is arranged on a limit plate (4) and sleeved on an outer peripheral surface of the inner frame assembly (1), and when the bushing is transformed from the second stage to the third stage, the point contact between the rubber assembly (2) and the limit plate (4) is transformed into surface contact; An exoskeleton (3), the exoskeleton (3) being sleeved on the outer peripheral surface of the rubber assembly (2), and the bottom end of the exoskeleton (3) being connected to the surface of the rubber assembly (2); The rubber assembly (2) comprises: A rubber body (20), the rubber body (20) being a cylindrical structure and being sleeved on the outer peripheral surface of the inner frame assembly (1), the bottom end of the rubber body (20) extending in the circumferential direction away from the center of the rubber body (20) to form an annular structure, the top end of the annular structure being connected to the bottom end of the outer frame (3); The ring structure comprises: A flat end surface (24) and a lower limit rubber (22), wherein the flat end surface (24) and the lower limit rubber (22) are arranged alternately along the circumference of the rubber body (20); Along the circumference of the rubber body (20), the middle portion of the lower limit rubber (22) protrudes along the axial direction of the rubber body (20) towards a side away from the bottom end of the rubber body (20), so that the bottom end of the lower limit rubber (22) has an arc-shaped structure; The lower limit rubber (22) also has an arc-shaped structure in the radial direction of the rubber body (20); The bushing movement state is divided into three stages. In the first stage, the gap between the rubber assembly (2) and the limit plate (4) is reduced to the point of being in contact. In the second stage, the lower limit rubber (22) and the limit plate (4) are in point contact. In the third stage, the lower limit rubber (22) and the limit plate (4) are in surface contact.

2. The bushing according to claim 1, characterized in that: The surface of the lower limit rubber (22) is provided with a plurality of protrusions.

3. The bushing according to claim 1, characterized in that: The top end of the rubber body (20) extends in the circumferential direction towards a side away from the center of the rubber body (20), also forming an annular structure; A cavity (200) is provided on the rubber body (20) along the axial direction of the rubber body (20); The top of the annular structure is a plane, and the width of the annular structure increases along the radial direction at the position of the cavity (200); The surface of the annular structure is also provided with a plurality of protrusions.

4. The bushing according to claim 1, characterized in that: The limit plate (4) is provided with a clamping claw (41), the inner frame assembly (1) is provided with a rectangular groove (101), and the clamping claw (41) is clamped with the rectangular groove (101); A third flange structure (42) is provided on the limiting plate (4) at a position close to the edge.

5. The bushing according to claim 1, characterized in that The inner frame assembly (1) comprises: A first inner skeleton (10), wherein a concave tooth-shaped structure (102) is provided on the surface of the first inner skeleton (10); A second inner frame (11), the second inner frame (11) being sleeved on the outer peripheral surface of the first inner frame (10), and the inner wall of the second inner frame (11) being provided with a convex tooth structure (110), the concave tooth structure (102) being engaged with the convex tooth structure (110); The surface of the second inner skeleton (11) is provided with an inner concave structure (111), and the second inner skeleton (11) is provided with a weight-reducing hole along the axial direction of the second inner skeleton (11).

6. The bushing according to claim 1, characterized in that: The top end of the outer frame (3) is bent toward a side close to the inner frame assembly (1) to form a first flange structure (30); a slot is provided on the rubber assembly (2) along the circumference of the rubber assembly (2); and the first flange structure (30) is engaged with the slot; The bottom end of the outer frame (3) is bent towards a side away from the inner frame assembly (1) to form a second flange structure (31), and the bottom end of the second flange structure (31) is in contact with the rubber assembly (2).

7. A vehicle, characterized in that: It includes: A bushing as claimed in any one of claims 1 to 6.

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