Suspension bushing and vehicle

Abstract

The suspension lining comprises an inner pipe, a first middle pipe and an outer pipe, the inner pipe, the first middle pipe and the outer pipe are sequentially arranged in a sleeved mode from inside to outside, a first buffering body is formed between the inner pipe and the first middle pipe, and a second buffering body is formed between the first middle pipe and the outer pipe; the second middle pipe and the first middle pipe are matched in an inserted mode in the axial direction, and the second middle pipe, the first middle pipe and the first buffering body jointly define a heat insulation cavity at the end of the first buffering body. According to the suspension bushing, the heat insulation cavity can prevent a heat source from directly radiating the first buffer body, so that the problems of aging failure, cracking and the like caused by heating of the first buffer body can be avoided, the service life of the suspension bushing can be prolonged, the maintenance cost can be reduced, secondary vibration reduction can be performed by arranging the first buffer body and the second buffer body, and the service life of the suspension bushing is prolonged. The damping effect is guaranteed, the NVH performance of the whole vehicle and the use comfort of a user can be improved, the use effect is better, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a suspension bushing and a vehicle with the suspension bushing. Background Art

[0002] With the development of the national economy and the continuous improvement of living standards, vehicles are becoming more and more important in people's lives and travel. The comfort of vehicle use is what needs to be considered during vehicle production and manufacturing. With the rapid development of vehicle production technology, pure electric vehicles are rising in line with the concept of energy conservation and emission reduction. Pure electric vehicles are driven by motors, which have large torque output starting from low speeds, high motor speeds, light weight, and high excitation frequency. The existing technology provides suspension bushings at the connection between the powertrain and the frame to buffer vibrations and improve user riding comfort. However, the high temperature generated by the operation of the motor will affect the rubber in the suspension bushing, causing aging of the rubber and other problems, reducing the vibration isolation effect of the suspension bushing, shortening the service life of the suspension bushing, and increasing maintenance costs. There is room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a suspension bushing that can extend the service life of the first buffer body while ensuring the vibration reduction effect, thereby reducing the subsequent maintenance cost and improving the NVH performance of the whole vehicle and the user's comfort.

[0004] According to the suspension bushing of the embodiment of the utility model, it includes: an inner tube, a first middle tube and an outer tube, the inner tube, the first middle tube and the outer tube are sequentially arranged from the inside to the outside, and a first buffer body is formed between the inner tube and the first middle tube, and a second buffer body is formed between the first middle tube and the outer tube; a second middle tube, the second middle tube is axially plugged with the first middle tube, and the second middle tube, the first middle tube and the first buffer body jointly define a heat insulation cavity at the end of the first buffer body.

[0005] According to the suspension bushing of the embodiment of the utility model, the second middle tube, the first middle tube and the first buffer body jointly define a heat insulation cavity at the end of the first buffer body, so that the heat insulation cavity can block the heat source from directly radiating the first buffer body, thereby preventing the first buffer body from aging, failure and cracking due to heat, thereby extending the service life of the suspension bushing and reducing maintenance costs. In addition, the first buffer body and the second buffer body can be provided to perform secondary vibration reduction to ensure the vibration reduction effect, thereby improving the NVH performance of the whole vehicle and the user comfort, with better use effect and wider scope of application.

[0006] According to the suspension bushing of some embodiments of the utility model, the second middle tube includes an axial plug-in portion and a radial blocking portion, the radial blocking portion is connected to the axial plug-in portion, and the axial plug-in portion is used to axially plug-in cooperate with the first middle tube, and the heat insulation cavity is located between the radial blocking portion and the end face of the first buffer body and the end face of the first middle tube.

[0007] According to the suspension bushing of some embodiments of the utility model, the first buffer body includes a main body and an extension portion, the main body is located between the first middle tube and the inner tube, the extension portion protrudes and extends at the end of the main body, and the outer diameter of the extension portion is smaller than the outer diameter of the main body, and the radial blocking portion is sleeved outside the extension portion and spaced apart from the main body.

[0008] According to the suspension bushing of some embodiments of the present invention, the axial insertion depth of the axial insertion portion and the first middle tube is greater than half of the axial length of the first middle tube.

[0009] According to some embodiments of the present invention, the suspension bushing further includes: a mass ring, which is sleeved outside the second middle tube, and the mass ring and the first middle tube are spaced apart and distributed along the axial direction.

[0010] According to the suspension bushing of some embodiments of the utility model, the outer peripheral wall of the second middle tube is provided with a mounting groove, and the inner periphery of the mass ring is inserted into the mounting groove;

[0011] And / or, the mass ring and the second middle tube are integrally formed;

[0012] And / or, the outer diameter of the mass ring is greater than the outer diameter of the second buffer body.

[0013] According to the suspension bushing of some embodiments of the utility model, the first buffer body is provided with a first buffer hole, and the first buffer hole is extended along the circumference of the first buffer body;

[0014] And / or, the second buffer body is provided with a second buffer hole, and the second buffer hole is extended along the circumference of the second buffer body;

[0015] And / or, the first middle tube is provided with a weight-reducing hole, and the weight-reducing hole is extended along the circumference of the first middle tube.

[0016] According to some embodiments of the suspension bushing of the present invention, there are two first buffer holes, and the two first buffer holes are distributed opposite each other in the first direction, there are two second buffer holes, and the two second buffer holes are distributed opposite each other in the second direction, and the first direction is perpendicular to the second direction.

[0017] According to the suspension bushing of some embodiments of the utility model, the second buffer body is formed with a limiting flange protruding radially outward on the outer peripheral wall near one end of the insulation cavity, and the outer tube is formed with a stop flange protruding radially outward on the outer peripheral wall near one end of the insulation cavity, and the limiting flange and the stop flange are pressed together along the axial direction.

[0018] The utility model also provides a vehicle.

[0019] A vehicle according to an embodiment of the utility model comprises a powertrain, a subframe and a suspension bushing as described in any one of the above items, wherein the powertrain is supported and mounted on the subframe via the suspension bushing.

[0020] The vehicle and the above-mentioned suspension bushing have the same advantages as those of the prior art, which will not be described in detail here.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a cross-sectional view of a suspension bushing according to an embodiment of the utility model Figure 1 ;

[0024] Figure 2 The structure of the suspension bushing according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 3 The structure of the suspension bushing according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 4 The structure of the suspension bushing according to the embodiment of the utility model is shown in FIG. Figure 3 ;

[0027] Figure 5 is a cross-sectional view of a first middle tube and a second middle tube according to an embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the first middle tube and the second middle tube according to an embodiment of the utility model;

[0029] Figure 7 is a cross-sectional view of a suspension bushing according to an embodiment of the utility model Figure 2 ;

[0030] Figure 8 The structure of the suspension bushing according to the embodiment of the utility model is shown in FIG. Figure 4 ;

[0031] Fig. 9 is a cross-sectional view of a first middle tube, a second middle tube and a mass ring according to an embodiment of the utility model;

[0032] Fig.10 It is a schematic structural diagram of a first middle tube, a second middle tube and a mass ring according to an embodiment of the utility model.

[0033] Reference numerals:

[0034] Suspension bushing 100,

[0035] Inner tube 1, first middle tube 2, weight reduction hole 21, plug-in groove 22, second middle tube 3, axial plug-in portion 31, radial blocking portion 32, mounting groove 33, outer tube 4, stop flange 41, first buffer body 5, main body 51, extension portion 52, first buffer hole 53, second buffer body 6, second buffer hole 61, limit flange 62, thermal insulation cavity 7, mass ring 8. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Unless otherwise specified, the front-to-back direction in this application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0040] Reference below Figure 1-Figure 10 Description According to the suspension bushing 100 of the embodiment of the utility model, the service life of the first buffer body 5 can be extended while ensuring the vibration reduction effect, thereby reducing the subsequent maintenance cost and improving the NVH performance of the whole vehicle and the user comfort.

[0041] like Figure 1-Figure 10 As shown, a suspension bushing 100 according to an embodiment of the present utility model comprises: an inner tube 1 , a first middle tube 2 , an outer tube 4 and a second middle tube 3 .

[0042] The inner tube 1, the first middle tube 2 and the outer tube 4 are sequentially arranged from the inside to the outside, and a first buffer body 5 is formed between the inner tube 1 and the first middle tube 2, a second buffer body 6 is formed between the first middle tube 2 and the outer tube 4, the second middle tube 3 and the first middle tube 2 are axially plugged together, and the second middle tube 3, the first middle tube 2 and the first buffer body 5 jointly define an insulating cavity 7 at the end of the first buffer body 5.

[0043] The suspension bushing 100 is a connecting piece between the subframe and the powertrain, and has a vibration isolation function. The powertrain generates vibration force during operation, and the suspension bushing 100 can prevent the powertrain from transmitting vibration force to the frame, thereby improving the NVH performance of the vehicle. When the vehicle runs on an uneven road, vibration and impact will be generated, and the suspension bushing 100 can prevent the vibration and impact from being transmitted to the powertrain, thereby ensuring the reliability of the powertrain operation.

[0044] Specifically, the suspension bushing 100 is provided with an inner tube 1, which is provided with a tubular structure and is made of metal material, which can be formed by extrusion or casting, and the power assembly can be connected to the inner tube 1 through a connector, and the suspension bushing 100 is also provided with a first middle tube 2, which is provided with a tubular structure and is sleeved outside the inner tube 1, and the first middle tube 2 can be provided with a resin or metal material and can be formed by injection molding or extrusion, and a first buffer body 5 is provided between the inner tube 1 and the first middle tube 2, and the first buffer body 5 can be provided with a natural rubber material, and after the first buffer body 5 is provided between the inner tube 1 and the first middle tube 2, the first buffer body 5 can be vulcanized to improve the elasticity and durability of the first buffer body 5, and improve its vibration absorption effect.

[0045] Furthermore, the suspension bushing 100 is also provided with an outer tube 4, which is configured as a tubular structure and is sleeved on the outside of the first middle tube 2. The outer tube 4 can be configured as a resin or metal material and can be formed by injection molding or extrusion. A second buffer body 6 is provided between the outer tube 4 and the first middle tube 2. The second buffer body 6 can be configured as a natural rubber material, and after the second buffer body 6 is disposed between the outer tube 4 and the first middle tube 2, the second buffer body 6 can be vulcanized to improve the elasticity and durability of the second buffer body 6, etc., to improve its vibration absorption effect, and the inner tube 1, the first buffer body 5, the first middle tube 2, the second buffer body 6 and the outer tube 4 can perform secondary vibration absorption together to improve the vibration reduction effect of the suspension bushing 100, thereby improving the NVH performance of the entire vehicle and the user comfort.

[0046] The suspension bushing 100 is also provided with a second middle tube 3, which is set to a tubular structure. The second middle tube 3 can be set to a resin or metal material and can be formed by injection molding or extrusion. The first middle tube 2 is provided with an annular plug-in groove 22, which is extended along the axial direction, and the plug-in groove 22 is open at the end of the first middle tube 2. The second middle tube 3 can be plugged into the plug-in groove 22 from the open mouth, so that the second middle tube 3 and the first middle tube 2 can be plugged and matched along the axial direction, and the end of the second middle tube 3 away from the plug-in direction and the first middle tube 2 and the first buffer body 5 together define a heat insulation cavity 7 at the end of the first buffer body 5. The heat insulation cavity 7 makes the end of the second middle tube 3 away from the plug-in direction have a distance from the first buffer body 5, so that when the suspension bushing 100 is connected to the powertrain, the heat insulation cavity 7 can block the heat source from directly radiating the first buffer body 5, which can avoid aging failure and cracking of the first buffer body 5 due to heat, and can extend the service life of the suspension bushing 100 and reduce maintenance costs.

[0047] According to the suspension bushing 100 of the embodiment of the utility model, the second middle tube 3, the first middle tube 2 and the first buffer body 5 define a heat insulation cavity 7 at the end of the first buffer body 5, so that the heat insulation cavity 7 can block the heat source from directly radiating the first buffer body 5, thereby preventing the first buffer body 5 from aging, failure and cracking due to heat, thereby extending the service life of the suspension bushing 100 and reducing the maintenance cost. In addition, the first buffer body 5 and the second buffer body 6 can perform secondary vibration reduction to ensure the vibration reduction effect, thereby improving the NVH performance of the whole vehicle and the user comfort, with better use effect and wider application range.

[0048] In some embodiments, the second middle tube 3 includes an axial plug-in portion 31 and a radial blocking portion 32, the radial blocking portion 32 is connected to the axial plug-in portion 31, and the axial plug-in portion 31 is used to axially plug and cooperate with the first middle tube 2, and the insulation cavity 7 is located between the radial blocking portion 32 and the end face of the first buffer body 5 and the end face of the first middle tube 2.

[0049] Specifically, Figure 5-Figure 6 As shown, the second middle tube 3 can be axially plugged in with the first middle tube 2, and the second middle tube 3 is provided with an axial plug-in portion 31 and a radial blocking portion 32. The axial plug-in portion 31 can be set as a tubular structure, and the radial blocking portion 32 can be set as an annular structure and is axially located at the end of the second middle tube 3, the radial blocking portion 32 is connected to the end of the axial plug-in portion 31, and the axial plug-in portion 31 and the plug-in groove 22 of the first middle tube 2 are correspondingly arranged, so that the axial plug-in portion 31 can be plug-connected with the plug-in groove 22 of the first middle tube 2, and then the second middle tube 3 can be axially plug-connected with the first middle tube 2, and the axial plug-in portion 31 of the second middle tube 3 and the plug-in groove 22 of the first middle tube 2 are interference fit to ensure plug-in reliability.

[0050] Furthermore, the radial blocking portion 32 is extended radially, and the axial plug-in portion 31 is extended axially, and after the first middle tube 2 and the second middle tube 3 are plugged in, an insulating cavity 7 is formed between the radial blocking portion 32 and the end faces of the first buffer body 5 and the end faces of the first middle tube 2. The radial blocking portion 32 is connected to the end of the axial blocking portion, so that the end face of the radial blocking portion 32, the inner wall of the axial plug-in portion 31, the end face of the first buffer body 5, the end face of the first middle tube 2 and the outer wall of the inner tube 1 jointly form an annular insulating cavity 7, which can block the heat source from directly radiating the first buffer body 5, extend the service life of the suspension bushing 100, and reduce maintenance costs.

[0051] In some embodiments, the first buffer body 5 includes a main body 51 and an extension portion 52, the main body 51 is located between the first middle tube 2 and the inner tube 1, the extension portion 52 protrudes and extends at the end of the main body 51, and the outer diameter of the extension portion 52 is smaller than the outer diameter of the main body 51, and the radial blocking portion 32 is sleeved outside the extension portion 52 and separated from the main body 51.

[0052] Specifically, the first buffer body 5 is arranged between the inner tube 1 and the first middle tube 2. The first buffer body 5 can be set to a material such as natural rubber, thereby improving the vibration reduction effect of the suspension bushing 100 and improving the NV performance of the whole vehicle. Figure 1-Figure 3 As shown, the first buffer body 5 is provided with a main body portion 51 and an extension portion 52. The main body portion 51 is arranged between the first middle tube 2 and the inner tube 1, and the extension portion 52 is connected to the end of the main body portion 51. The extension portion 52 can be arranged at both ends of the main body portion 51. The extension portion 52 is extended at the end of the main body portion 51 in a direction away from the main body portion 51, and the outer diameter of the extension portion 52 is set to be smaller than the main body portion 51.

[0053] Furthermore, the second middle tube 3 is plug-connected with the first middle tube 2, and a radial blocking portion 32 is provided at the end of the second middle tube 3, and a heat insulating cavity 7 is formed between the radial blocking portion 32 and the end of the main body 51 of the first buffer body 5, that is, the radial blocking portion 32 is spaced apart from the main body 51, thereby blocking the transfer of heat from the heat source, and the extension portion 52 of the first buffer body 5 can be arranged between the inner circumferential wall of the radial blocking portion 32 and the outer circumferential wall of the inner tube 1, thereby reducing the vibration of the radial blocking portion 32 of the second inner tube 1, thereby ensuring the vibration reduction effect of the suspension bushing 100 and improving the NVH performance of the whole vehicle.

[0054] In some embodiments, the axial insertion depth of the axial insertion portion 31 and the first middle tube 2 along the axial direction is greater than half of the axial length of the first middle tube 2 .

[0055] Specifically, the first middle tube 2 is provided with an annular plug-in groove 22 extending in the axial direction, and the axial plug-in portion 31 of the second middle tube 3 can be plugged into the plug-in groove 22, so that the second middle tube 3 and the first middle tube 2 can be plugged and matched in the axial direction, and as Figure 5 and Fig. 9 As shown, the length of the axial plug-in portion 31 is greater than the depth of the plug-in groove 22, that is, when the axial plug-in portion 31 is plugged into the first middle tube 2, there is a distance between the radial blocking portion 32 and the end face of the first middle tube 2, thereby preventing heat from being transferred to the first buffer body 5 through the radial blocking portion 32, thereby extending the service life of the first buffer body 5.

[0056] Moreover, the axial insertion depth of the axial insertion portion 31 of the second middle tube 3 and the first middle tube 2 is set to be greater than half of the axial length of the first middle tube 2, that is, the insertion depth of the axial insertion portion 31 and the first middle tube 2 is deeper, thereby ensuring the reliability of the insertion of the first middle tube 2 and the second middle tube 3, and avoiding deformation of the second middle tube 3 due to radial force, thereby extending the service life.

[0057] In some embodiments, the suspension bushing 100 further includes: a mass ring 8 , which is sleeved outside the second middle tube 3 , and the mass ring 8 is spaced apart from the first middle tube 2 in the axial direction.

[0058] Specifically, Figure 1-Figure 4 as well as Figure 7-10 As shown, the suspension bushing 100 is also provided with a mass ring 8, which is arranged as an annular structure, and the mass ring 8 can be arranged as a material such as resin, natural rubber or metal, and the mass ring 8 can be formed by injection molding, vulcanization, extrusion or casting, and the mass ring 8 is sleeved outside the second middle tube 3, and the end of the second middle tube 3 protrudes from the first middle tube 2, so that the mass ring 8 and the first middle tube 2 are spaced apart and distributed along the axial direction, so that the mass ring 8 can also block part of the heat from the heat source from being transferred to the first buffer body 5, thereby improving reliability, and when the road surface is uneven, according to the formula ω2=k / m, it can be obtained that by changing the material, diameter and size of the mass ring 8, the overall mass of the suspension bushing 100 can be changed, and then the frequency can be adjusted to attenuate the transmission of the excitation energy and improve the vibration reduction effect.

[0059] In some embodiments, the outer wall of the second middle tube 3 is provided with an installation groove 33, and the inner periphery of the mass ring 8 is inserted into the installation groove 33; and / or, the mass ring 8 and the second middle tube 3 are integrally formed; and / or, the outer diameter of the mass ring 8 is larger than the outer diameter of the second buffer body 6.

[0060] Specifically, the suspension bushing 100 is also provided with a mass ring 8, which is sleeved outside the second middle tube 3 and is axially spaced apart from the first middle tube 2, and the mass ring 8 and the second middle tube 3 are plug-fitted, or the mass ring 8 and the second middle tube 3 are integrally formed, that is, the mass ring 8 can be set to be detachable from the second middle tube 3, and then mass rings 8 of different masses and sizes can be replaced, thereby improving the setting flexibility.

[0061] like Figure 1-Figure 4 As shown, the outer wall of the second middle tube 3 can be provided with a mounting groove 33 which is recessed radially inward, the inner periphery of the mass ring 8 can be inserted into the mounting groove 33, and the mass ring 8 and the mounting groove 33 are interference fit, the mounting method is simple and the mounting reliability can be improved, and it can also be as shown in Figure 7-10 As shown, the mass ring 8 and the second middle tube 3 are integrally formed, which can reduce the manufacturing process and thus improve the production efficiency.

[0062] At the same time, the outer diameter of the mass ring 8 can be set to be larger than the outer diameter of the second buffer body 6, and the outer peripheral wall of the second buffer body 6 can be provided with a limited flange 62, etc. The outer diameter of the second buffer body 6 refers to the maximum size of the second buffer body 6 at all points in the circumference, and the outer diameter of the mass ring 8 is set to be larger than the outer diameter of the second buffer body 6, so that after the mass ring 8 is installed in the second middle tube 3, it is distributed axially spaced apart from the first buffer body 5 and the second buffer body 6, thereby blocking part of the heat from the heat source from being transferred to the first buffer body 5 and the second buffer body 6, thereby extending the service life of the first buffer body 5 and the second buffer body 6.

[0063] The second middle tube 3 and the first middle tube 2 are interference fit. When the second middle tube 3 is inserted into the first middle tube 2, the first buffer body 5 and the second buffer body 6 are compressed, and the compression displacement is set to S, and satisfies: K=F / S, wherein K is the stiffness, and F is the force exerted on the first buffer body 5 and the second buffer body 6. The stiffness value can be obtained by measuring the compression displacement and the force. When the road surface is uneven, according to the formula ω2=k / m, the overall mass of the suspension bushing 100 can be changed by changing the material, diameter and size of the first middle tube 2, the second middle tube 3 or the mass ring 8, and the frequency can be adjusted to attenuate the transmission of the excitation energy and improve the vibration reduction effect.

[0064] In some embodiments, the first buffer body 5 is provided with a first buffer hole 53, which is extended along the circumference of the first buffer body 5; and / or, the second buffer body 6 is provided with a second buffer hole 61, which is extended along the circumference of the second buffer body 6; and / or, the first middle tube 2 is provided with a weight-reducing hole 21, which is extended along the circumference of the first middle tube 2.

[0065] Specifically, a first buffer body 5 is arranged between the inner tube 1 and the first middle tube 2, and Figure 1 and Figure 3 As shown, the first buffer body 5 is provided with a first buffer hole 53, and the first buffer hole 53 is extended along the circumferential direction of the first buffer body 5, and the first buffer hole 53 penetrates the first buffer body 5 along the axial direction, so that the first buffer body 5 has a compression margin to block the transmission of part of the vibration and improve the vibration reduction effect. The second buffer body 6 is arranged between the outer tube 4 and the first middle tube 2, and as shown Figure 1 and Figure 3 As shown, the second buffer body 6 may also be provided with a second buffer hole 61, which is extended along the circumference of the second buffer body 6 and penetrates the second buffer body 6 axially, so that the second buffer body 6 has a compression margin to block the transmission of part of the vibration and improve the vibration reduction effect.

[0066] Furthermore, the first middle tube 2 may also be provided with a weight-reducing hole 21, and the weight-reducing hole 21 is extended along the circumference of the first middle tube 2, and the weight-reducing hole 21 passes through the plug-in groove 22 and the end of the first middle tube 2 away from the insulation cavity 7, so that when the second middle tube 3 is plugged into the first middle tube 2, the gas in the plug-in groove 22 can be discharged through the weight-reducing hole 21, which is convenient for the first middle tube 2 to be plugged into the second middle tube 3, and the weight-reducing hole 21 is arranged in plurality, and the plurality of weight-reducing holes 21 are evenly spaced in the circumferential direction. The arrangement of a plurality of weight-reducing holes 21 can improve the lightweight of the vehicle, and the evenly spaced arrangement can ensure the consistency of the structural strength of the first middle tube 2 in the circumferential direction, and ensure the overall structural strength of the suspension bushing 100.

[0067] In some embodiments, there are two first buffer holes 53 and the two first buffer holes 53 are oppositely distributed in the first direction, there are two second buffer holes 61 and the two second buffer holes 61 are oppositely distributed in the second direction, and the first direction is perpendicular to the second direction.

[0068] Specifically, Figure 1 and Figure 3 As shown, the first buffer body 5 is provided with a first buffer hole 53, which is extended along the circumference of the first buffer body 5, and the second buffer body 6 may also be provided with a second buffer hole 61, which is extended along the circumference of the second buffer body 6, and the first buffer hole 53 and the second buffer hole 61 are both set to two, the two first buffer holes 53 have the same shape and size and are directly opposite to each other in the first direction, the two second buffer holes 61 have the same shape and size and are directly opposite to each other in the second direction, and the first direction is set perpendicular to the second direction, that is, when the first direction is set to the horizontal direction, the second direction is set to the vertical direction, thereby changing the upward trend of the curvature of the soft and hard inflection point stiffness curves in the torque direction of the first buffer body 5 and the second buffer body 6, improving the vibration isolation performance of the first buffer body 5 and the second buffer body 6, and adjusting the relative distribution angle of the first buffer hole 53 and the second buffer hole 61 according to actual conditions, thereby improving the NVH performance of the whole vehicle.

[0069] Among them, both the first buffer hole 53 and the second buffer hole 61 can be set to multiple, that is, the first buffer hole 53 can be set to three, four, etc., and the multiple first buffer holes 53 are arranged on the first buffer body 5 at equal intervals along the circumferential direction. The second buffer hole 61 can also be set to three, four, etc., and the multiple second buffer holes 61 are arranged on the second buffer body 6 at equal intervals along the circumferential direction. The vibration isolation performance of the first buffer body 5 and the second buffer body 6 can be improved, thereby improving the NVH performance of the whole vehicle, and the number of settings can be adjusted according to actual usage requirements to improve the setting flexibility.

[0070] In some embodiments, the second buffer body 6 is formed with a limiting flange 62 protruding radially outward on the outer peripheral wall at one end near the insulation cavity 7, and the outer tube 4 is formed with a stop flange 41 protruding radially outward on the outer peripheral wall at one end near the insulation cavity 7, and the limiting flange 62 and the stop flange 41 are pressed together along the axial direction.

[0071] Specifically, Figure 1-Figure 10As shown, the outer tube 4 is sleeved outside the first middle tube 2, and a second buffer body 6 is arranged between the first middle tube 2 and the outer tube 4, and the outer wall of one end of the second buffer body 6 forms a limiting flange 62, and the limiting flange 62 protrudes radially outward, and the limiting flange 62 is arranged at one end of the second buffer body 6 close to the heat insulation cavity 7, and the outer wall of one end of the outer tube 4 forms a stop flange 41, and the stop flange 41 protrudes radially outward, and the stop flange 41 is arranged at one end of the outer tube 4 close to the heat insulation cavity 7. When the outer tube 4 and the second buffer body 6 are installed, the limiting flange 62 can be pressed against the stop flange 41 along the axial direction to ensure the installation accuracy. After the installation is completed, the displacement between the outer tube 4 and the second buffer body 6 can be limited to ensure the installation reliability, and the outer diameter of the mass ring 8 is larger than the outer diameter of the limiting flange 62, so that the mass ring 8 can block part of the heat from the heat source from being transferred to the first buffer body 5 and the second buffer body 6, thereby extending the service life of the first buffer body 5 and the second buffer body 6.

[0072] The utility model also provides a vehicle.

[0073] According to the vehicle of the embodiment of the utility model, it includes a powertrain, a subframe and any one of the above-mentioned suspension bushings 100. The powertrain is supported and mounted on the subframe through the suspension bushing 100. The subframe is provided with a mounting hole, and the suspension bushing 100 is pressed into the mounting hole. The powertrain can be connected to the suspension bushing 100 through a connecting piece, etc., thereby reducing the vibration transmitted from the powertrain to the vehicle body, and also reducing the vibration transmitted to the powertrain when the vehicle travels on a bumpy road, thereby improving the NVH performance of the whole vehicle and improving the user comfort.

[0074] According to the vehicle of the embodiment of the utility model, the second middle tube 3, the first middle tube 2 and the first buffer body 5 define a heat insulation cavity 7 at the end of the first buffer body 5, so that the heat insulation cavity 7 can block the heat source from directly radiating the first buffer body 5, thereby preventing the first buffer body 5 from aging, failure and cracking due to heat, thereby extending the service life of the suspension bushing 100 and reducing the maintenance cost. The first buffer body 5 and the second buffer body 6 are provided to perform secondary vibration reduction to ensure the vibration reduction effect, thereby improving the NVH performance of the whole vehicle and the user comfort, with better use effect and wider scope of application.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A suspension bushing, characterized in that: include: An inner tube, a first middle tube and an outer tube, wherein the inner tube, the first middle tube and the outer tube are sequentially sleeved from the inside to the outside, and a first buffer body is formed between the inner tube and the first middle tube, and a second buffer body is formed between the first middle tube and the outer tube; The second middle tube is plugged and matched with the first middle tube along the axial direction, and the second middle tube, the first middle tube and the first buffer body jointly define a heat insulation cavity at the end of the first buffer body.

2. The suspension bushing according to claim 1, characterized in that: The second middle tube includes an axial plug-in portion and a radial blocking portion, the radial blocking portion is connected to the axial plug-in portion, and the axial plug-in portion is used to be axially plug-in-matched with the first middle tube, and the heat insulation cavity is located between the radial blocking portion and the end surface of the first buffer body and the end surface of the first middle tube.

3. The suspension bushing according to claim 2, characterized in that: The first buffer body includes a main body and an extension portion, the main body is located between the first middle tube and the inner tube, the extension portion protrudes and extends at the end of the main body, and the outer diameter of the extension portion is smaller than the outer diameter of the main body, and the radial blocking portion is sleeved outside the extension portion and spaced apart from the main body.

4. The suspension bushing according to claim 2, characterized in that: The depth of the axial insertion portion and the first middle tube in the axial direction is greater than half of the axial length of the first middle tube.

5. The suspension bushing according to any one of claims 1 to 4, characterized in that: Also includes: A mass ring is sleeved outside the second middle tube, and the mass ring and the first middle tube are spaced apart and distributed along the axial direction.

6. The suspension bushing according to claim 5, characterized in that The outer peripheral wall of the second middle tube is provided with a mounting groove, and the inner periphery of the mass ring is inserted into the mounting groove; And / or, the mass ring and the second middle tube are integrally formed; And / or, the outer diameter of the mass ring is greater than the outer diameter of the second buffer body.

7. The suspension bushing according to any one of claims 1 to 4, characterized in that: The first buffer body is provided with a first buffer hole, and the first buffer hole is extended along the circumference of the first buffer body; And / or, the second buffer body is provided with a second buffer hole, and the second buffer hole is extended along the circumference of the second buffer body; And / or, the first middle tube is provided with a weight-reducing hole, and the weight-reducing hole is extended along the circumference of the first middle tube.

8. The suspension bushing according to claim 7, characterized in that There are two first buffer holes, and the two first buffer holes are distributed opposite to each other in the first direction. There are two second buffer holes, and the two second buffer holes are distributed opposite to each other in the second direction. The first direction and the second direction are perpendicular to each other.

9. The suspension bushing according to any one of claims 1 to 4, characterized in that: The second buffer body is formed with a limiting flange protruding radially outward on the outer peripheral wall of one end close to the insulation cavity, and the outer tube is formed with a stop flange protruding radially outward on the outer peripheral wall of one end close to the insulation cavity, and the limiting flange and the stop flange are pressed against each other along the axial direction.

10. A vehicle, characterized in that: The vehicle comprises a powertrain, a subframe and a suspension bushing according to any one of claims 1 to 9, wherein the powertrain is supported and mounted on the subframe via the suspension bushing.

Images