Bushing assembly and vehicle

Abstract

The bushing assembly comprises a bushing body and a lower tray, one end of the bushing body is used for being connected with an auxiliary frame, and a buffering cushion is arranged on the end face of the other end of the bushing body; the lower tray is flexibly connected with the end, provided with the buffering cushion, of the lining body, the lower tray is provided with an avoiding notch and an abutting portion, the position of the avoiding notch is aligned to the lining body, and the abutting portion is used for making abutting contact with the buffering cushion. By means of the technical scheme, large abnormal sound generated between parts inside the automobile under the condition that the automobile is accelerated urgently or under the special working condition can be reduced, interference on evaluation of the off-line test of the automobile is avoided, and the comfort and driving experience of the automobile are improved.

Description

Technical Field

[0001] The present application relates to but is not limited to the field of automotive parts, and in particular to a bushing assembly and a vehicle. Background Art

[0002] In recent years, new energy vehicle models have developed rapidly, and the acceleration performance of electric vehicles has become one of the important factors for people to buy cars. However, during the off-line test of the vehicle or under some special working conditions, such as sudden acceleration, bumps or turns, excessive acceleration performance will bring more obvious changes in the body posture, especially the subframe will have obvious Z-direction and X-direction movement relative to the body. Usually, a bushing is provided between the subframe and the body to alleviate friction and vibration. However, due to the complex driving state and road conditions of the vehicle, most of the existing bushings are traditional rubber bushings, which are not ideal for preventing abnormal noise. Therefore, when a large friction noise is generated between the internal parts of the vehicle, it will reduce the passengers' experience of the vehicle and affect the evaluation of the off-line test of the vehicle. Utility Model Content

[0003] In order to solve the above problems, the present application provides a bushing assembly and a vehicle. By applying the technical solution of the present application, the large abnormal noise generated between the internal parts of the vehicle under sudden acceleration or special working conditions can be reduced, thereby avoiding interference with the evaluation of the vehicle's off-line test and improving the vehicle's comfort and driving experience.

[0004] In the first aspect, the present application provides a bushing assembly, including a bushing body and a lower tray; one end of the bushing body is used to connect to the subframe, and the end face of the other end is provided with a buffer pad; the lower tray is flexibly connected to the bushing body with one end of the buffer pad, and the lower tray is provided with an avoidance notch and a pressing portion, the position of the avoidance notch is aligned with the bushing body, and the pressing portion is used to press and contact with the buffer pad.

[0005] A buffer pad is provided on the end face of one end of the bushing body, and this end is flexibly connected to the lower tray, that is, the buffer pad is located between the bushing body and the lower tray, and the other end of the bushing body is connected to the subframe. When the vehicle is running fast or has a specific momentum, the subframe assembly will have obvious up and down floating and forward and backward movement relative to the vehicle body. As the subframe moves relative to the vehicle body, the end of the bushing body flexibly connected to the lower tray will also have relative movement, and the buffer pad will be squeezed between the bushing body and the lower tray. In this way, the buffer pad will play a role in friction, buffering and soft limiting between the bushing body and the lower tray.

[0006] A pressing portion is provided on the lower tray, and the pressing portion is used for the pressing contact between the lower tray and the buffer pad. Since an avoidance notch is also provided on the lower tray, and the position of the avoidance notch is aligned with the bushing body, when the inside of the bushing body generates pressing contact with the movement of the subframe, there will be a avoidance area between the avoidance notch and the bushing body, that is, when the lower tray and the buffer pad generate pressing contact, an avoidance space will be formed between the avoidance notch and the buffer pad, thereby eliminating a part of the contact area between the lower tray and the buffer pad. At this time, only the pressing portion and the buffer pad are squeezed and rubbed, thereby reducing the pressing contact area between the lower tray and the buffer pad, and further, the source of noise generated by friction or collision of the contact area will be reduced. In addition, since the continuous surface-to-surface contact during vehicle driving will cause a sharp increase in friction and noise when the vehicle is suddenly collided and vibrated, the setting of the avoidance gap reduces the area of ​​continuous extrusion contact when there is relative displacement between the lower tray and the buffer pad, thereby reducing the loud noise generated by the vehicle during sudden collisions and vibrations, reducing noise and abnormal noises and avoiding interference with the evaluation of the vehicle's road test, ensuring the smooth progress of the vehicle road test evaluation, and improving the vehicle's comfort and driving experience.

[0007] In an implementable manner provided in the present application, the avoidance gap is arranged at the outer edge of the lower tray, and the opening is away from the central axis of the lower tray.

[0008] In an implementable manner provided in the present application, there are multiple avoidance gaps, and the multiple avoidance gaps are evenly distributed along the circumference of the lower tray, and a pressing portion is formed between two adjacent avoidance gaps on the lower tray.

[0009] In an implementation provided in the present application, the buffer pad includes a buffer boss, which protrudes from a surface of the buffer pad on a side close to the lower tray toward the lower tray, and the surface of the buffer boss is used for pressing contact with the lower tray.

[0010] In an implementation provided in the present application, a groove sunken toward one side of the bushing body is provided on the surface of the buffer boss, and when the surface of the buffer boss is pressed against the lower tray, a buffer cavity is formed in the space enclosed by the lower tray and the groove.

[0011] In an implementation provided in the present application, there are multiple grooves, and the multiple grooves are evenly distributed along the extension direction of the buffer boss.

[0012] In an implementation provided in the present application, a plurality of anti-slip protrusions facing the side of the lower tray are further provided on the buffer boss, and the plurality of anti-slip protrusions are evenly distributed along the extension direction of the buffer boss.

[0013] In an implementable manner provided in the present application, the buffer boss and the pressing portion are arranged in alignment, and the size of the pressing portion completely covers the corresponding buffer boss.

[0014] In an implementation provided in the present application, along the circumference of the lower tray, the extended length of the buffer boss is consistent with the extended length of the pressing portion.

[0015] In a second aspect, the present application provides a vehicle, comprising the bushing assembly provided in any one of the first aspects, and further comprising a subframe, wherein the bushing assembly is connected to the subframe via a bushing body.

[0016] The vehicle provided in the present application, since it includes the bushing assembly provided in any one of the first aspects, has the same technical effect, that is, it can reduce the large abnormal noise generated between the internal parts of the vehicle under sudden acceleration or special working conditions, avoid interference with the evaluation of the vehicle's off-line test, and improve the vehicle's comfort and driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An isometric view of a bushing assembly provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of the lower tray provided in an embodiment of the present application;

[0019] Figure 3 A front view of a bushing assembly provided in an embodiment of the present application;

[0020] Figure 4 A bottom view of the bushing body and the buffer pad after being connected according to an embodiment of the present application;

[0021] Figure 5 Provided in the embodiments of this application Figure 4 A partial enlarged view of B in the middle;

[0022] Figure 6 A bottom view of the bushing assembly provided in an embodiment of the present application.

[0023] Reference numerals:

[0024] 1-bushing body; 11-inner sleeve; 111-limiting interface; 2-buffer pad; 21-buffer boss; 211-groove; 212-anti-slip protrusion; 22-mold demoulding notch; 3-lower tray; 31 connecting port; 32-avoidance notch; 33-pressing part; 34-limiting part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0026] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0027] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0028] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0029] In the embodiments of the present application, the terms "include", "comprises" 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 includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0031] A bushing is a material or component used to wrap, cover or protect other objects. In the field of automotive parts, bushings are usually used to cover or protect automotive parts such as engine mounts, subframes, suspension components, etc. Bushings are usually made of rubber, plastic or other wear-resistant materials to reduce friction, vibration and noise.

[0032] The bushings used on the subframe are usually set at the connection point between the subframe and the body. It is necessary to ensure a tight fit between the bushing and the subframe to provide support and stability for the subframe and ensure the firmness of the structure. When the vehicle is in an emergency acceleration or has an excessively fast acceleration state, or when the vehicle passes through bumpy roads and turns, the vehicle's subframe will be subjected to greater forces and vibrations. The bushings set at the connection point between the subframe and the body will reduce the direct metal contact between the subframe and the body, reduce the friction and wear between the subframe and the body, and maintain the integrity of the subframe and the body.

[0033] An embodiment of the present application provides a vehicle, which includes a bushing assembly and a subframe, wherein the bushing assembly is connected to the subframe via a bushing body 1 .

[0034] The bushing assembly includes a bushing body 1, which connects the bushing assembly and the subframe. In this way, when the subframe moves up and down and forward and backward relative to the vehicle body under special working conditions, the movement of the subframe will drive the bushing body to move accordingly. At this time, the components inside the bushing assembly will produce corresponding extrusion friction, thereby avoiding metal friction and collision between the subframe and the vehicle body, and providing a buffer when the subframe is displaced relative to the vehicle body, thereby avoiding abnormal noise and component wear caused by metal collision, reducing friction and wear at the subframe connection points, increasing the wear resistance and integrity of the subframe, and improving the comfort and driving experience of the vehicle.

[0035] It should be added that the connection between the bushing body 1 and the subframe is a rigid connection, which can be achieved by welding, socketing, embedding, etc., to provide support for the subframe by the bushing body 1 and stability between the bushing body 1 and the subframe, thereby ensuring the firmness of the structure.

[0036] The vehicle provided in the embodiments of the present application may refer to a large vehicle, a small vehicle, a special-purpose vehicle, etc. For example, according to the vehicle type, the vehicle in the embodiments of the present application may refer to a sedan model, an off-road vehicle model, or other vehicle models.

[0037] The present application embodiment provides a bushing assembly, referring to Figure 1 , including a bushing body 1 and a lower tray 3; one end of the bushing body 1 is used to connect with the subframe, and the end face of the other end is provided with a buffer pad 2, the lower tray 3 is flexibly connected to the bushing body 1 provided with one end of the buffer pad 2, and the lower tray 3 is provided with an avoidance notch 32 and a pressing portion 33, the position of the avoidance notch 32 is aligned with the bushing body 1, and the pressing portion 33 is used to press and contact with the buffer pad 2.

[0038] A buffer pad 2 is provided on the end face of one end of the bushing body 1, and this end is flexibly connected to the lower tray 3, that is, the buffer pad 2 is located between the bushing body 1 and the lower tray 3, and the other end of the bushing body 1 is connected to the subframe. When the vehicle is running fast or has a specific momentum, the subframe assembly will have obvious up and down floating and forward and backward movement relative to the vehicle body. As the subframe moves relative to the vehicle body, the end of the bushing body 1 flexibly connected to the lower tray 3 will also have relative movement, and the buffer pad 2 will be squeezed between the bushing body 1 and the lower tray 3. In this way, the buffer pad 2 will play a role of friction, buffering and soft limit between the bushing body 1 and the lower tray 3.

[0039] The lower tray 3 is provided with a pressing portion 33, and the pressing portion 33 is used for the pressing contact between the lower tray 3 and the buffer pad 2. Since the lower tray 3 is also provided with an avoidance notch 32, and the position of the avoidance notch 32 is aligned with the bushing body 1, when the inside of the bushing body 1 generates a pressing contact with the movement of the subframe, an avoidance space is formed between the avoidance notch 32 and the buffer pad 2, that is, a part of the contact area between the lower tray 3 and the buffer pad 2 is eliminated. At this time, only the pressing portion 33 and the buffer pad 2 are squeezed and rubbed, so that the pressing contact area between the lower tray 3 and the buffer pad 2 can be reduced, thereby , the source of noise generated by friction or collision of the contact area will be reduced. In addition, due to the continuous contact between surfaces during vehicle driving, the friction and noise of the vehicle will increase sharply when it collides and vibrates suddenly. The setting of the avoidance gap 32 reduces the area of ​​continuous squeezing contact when there is relative displacement between the lower tray 3 and the buffer pad 2, thereby reducing the loud noise generated by the sudden collision and vibration of the vehicle. Reducing noise and abnormal sound can avoid interference with the evaluation of the vehicle's road test, ensure the smooth progress of the vehicle road test evaluation, and improve the vehicle's comfort and driving experience.

[0040] It should be noted here that the lower tray 3 is flexibly connected to one end of the bushing body 1 provided with the buffer pad 2, and the flexible connection allows a certain degree of relative movement between the lower tray 3 and the bushing body 1. In this way, when the subframe moves, it drives the bushing body 1 to move relative to the lower tray 3, and the bushing body 1 and the lower tray 3 press against the buffer pad 2 to produce friction, buffering and soft limit effects. Specifically, the flexible connection can be a threaded connection or a pin connection. In one embodiment of the present application, the lower tray 3 is connected to the bushing body 1 through a pin, and a connection port 31 is provided in the central axis area of ​​the lower tray 3. The pin passes through the connection port 31 and is connected to the bushing body to ensure that a certain degree of relative movement is allowed between the lower tray 3 and the bushing body 1.

[0041] The present application does not limit the material of the buffer pad 2. The buffer pad 2 needs to be able to play the role of friction, buffering and soft limit between the bushing body 1 and the lower tray 3. The buffer pad can be made of rubber, plastic, polyurethane, polyethylene foam and other materials. In one embodiment of the present application, the buffer pad 2 is made of rubber. The rubber buffer pad 2 is connected to the inner skeleton layer of the bushing body 1 by vulcanization. In order to facilitate demolding in the production process, the rubber buffer pad can be coated with a release agent on the mold surface, or heating demolding, cooling demolding and other methods can be used. In one embodiment of the present application, refer to Figure 4 In order to make it easier to demould the cushion during the manufacturing process, a demoulding notch 22 is provided on the cushion.

[0042] The position and shape of the avoidance gap 32 on the lower tray 3 can be various. It can be set in the area near the central axis of the lower tray 3, or in the area near the outer edge of the lower tray 3. In comparison, the vehicle may encounter more complex road conditions when driving, such as wading, rainy days, gravel, etc. In this case, due to bumps and splashes, gravel or rain may interfere with the vehicle bushing. The vehicle may encounter water or gravel splashing and infiltrating the interior of the bushing assembly structure, thereby affecting the stability and performance of the bushing assembly. In view of such situations, in one embodiment of the present application, reference is made to Figure 2 , the avoidance notch 32 is arranged at the outer edge of the lower tray 3, and the opening is away from the central axis of the lower tray 3, that is, the space between the avoidance notch 32 and the buffer pad 2 is open, and there is no enclosed cavity. This is conducive to the drainage of water and foreign matter from the bushing assembly, and can avoid the accumulation of foreign matter such as water or gravel between the lower tray 3 and the buffer pad 2, thereby reducing the friction noise of the bushing assembly caused by foreign matter.

[0043] At the same time, setting the avoidance notch 32 at the outer edge of the lower tray 3 can disperse the stress concentration area between the lower tray 3 and the bushing body 1 and reduce the stress of the structure. The opening of the avoidance notch 32 is away from the central axis of the lower tray 3. Under the premise of maintaining the contact stability between the lower tray 3 and the buffer pad 2, the contact area between the lower tray 3 and the buffer pad 2 can be reduced as much as possible, thereby reducing abnormal noise caused by friction and reducing energy loss and parts wear to a greater extent while ensuring the functionality of the bushing assembly.

[0044] It should be added here that the contour of the opening of the avoidance gap 32 can be arched or angled, and there is no limitation on this. In one embodiment of the present application, the contour of the avoidance opening 32 is arched and the size of the opening gradually decreases from the outer edge side close to the lower tray 3 to the side close to the central axis of the lower tray 3.

[0045] Any number of avoidance openings 32 may be provided on the lower tray 3. In order to make the pressing contact between the lower tray 3 and the buffer pad 2 more uniform, in one embodiment of the present application, referring to Figure 2 There are multiple avoidance notches 32, and the multiple avoidance notches 32 are evenly distributed along the circumference of the lower tray 3. At the same time, in order to ensure normal pressing contact between the lower tray 3 and the buffer pad 2 while reducing the pressing contact area, a pressing portion 33 is formed between two adjacent avoidance notches 32 on the lower tray 3.

[0046] By evenly distributing a plurality of avoidance notches 32 along the circumference of the lower tray 3, when the lower tray 3 and the buffer pad 2 are pressed and contacted, the load can be more evenly distributed to the buffer pad 2, which helps to reduce the irregular deformation caused by the uneven force on the buffer pad 2 and reduce the wear on the buffer pad 2. While reducing the pressing contact area, it is still necessary to ensure that the lower tray 3 and the buffer pad 2 can be pressed and contacted normally, thereby providing the corresponding friction and buffering effect for the subframe. In view of this, a pressing portion 33 is formed between two adjacent avoidance notches 32, so that the pressing portion 33 and the buffer pad 2 are pressed and contacted, providing corresponding friction and buffering, effectively concentrating the friction area in the contact area between the pressing portion 33 and the buffer pad 2, reducing the possibility of friction noise caused by uneven distribution of friction force, and at the same time reducing the impact force of the subframe movement on the bushing assembly when the vehicle is moving, improving the stability and comfort of the vehicle.

[0047] It should be noted that the present application does not limit the shape of the contour of the pressing portion 33. The contour of the pressing portion 33 is related to the contours of the two adjacent avoidance notches 32. Any shape of the pressing portion 33 formed between the two avoidance notches 32 is within the protection scope of the present application. Figure 2 In one embodiment of the present application, the two avoidance notches 32 have an arc-shaped contour, and the contour of the pressing portion 33 formed in the middle is an arc-shaped contour. The avoidance notches 32 and the pressing portion 33 on the lower tray 3 are combined to form a "petal-shaped" lower tray 3.

[0048] The present application embodiment provides a bushing assembly, referring to Figure 3 and Figure 4 The buffer pad 2 includes a buffer boss 21 , which protrudes from a surface of the buffer pad 2 close to the lower tray 3 toward the lower tray 3 , and the surface of the buffer boss 21 is used for pressing and contacting with the lower tray 3 .

[0049] The buffer boss 21 reduces the area of ​​the compression contact with the lower tray 3 on the basis of the buffer pad 2, and provides additional extrusion space, so that the buffer pad 2 can be squeezed and deformed to a greater extent when it is pressed and contacted with the lower tray 3. When the subframe moves, the additional extrusion deformation can absorb more energy, thereby reducing the extrusion contact area while enhancing the buffering and friction effects. At the same time, the compression contact between the buffer boss 21 and the lower tray 3 reduces the area of ​​direct contact between the buffer pad 2 and the lower tray 3. Due to the reduction in contact area, the friction force generated by frictional extrusion and the continuous contact area are reduced, thereby reducing the abnormal noise caused by friction.

[0050] It should be noted that the present application does not limit the material of the buffer boss 21. In one embodiment of the present application, in order to ensure the stability of the overall structure, the buffer pad 2 and the buffer boss 21 are made of the same material, which is rubber.

[0051] When the buffer boss 21 and the lower tray 3 are squeezed and rubbed, the buffer boss 21 will be deformed, and the continuous squeezing and friction will produce abnormal noise. In order to further reduce the continuous contact area between the buffer boss 21 and the lower tray 3, refer to Figure 3 , Figure 4 and Figure 5 A groove 211 is provided on the surface of the buffer boss 21 and is recessed toward one side of the bushing body 1 . When the surface of the buffer boss 21 is pressed against the lower tray 3 , a buffer cavity is formed in the space enclosed by the lower tray 3 and the groove 211 .

[0052] When the buffer boss 21 is pressed against the lower tray 3, the buffer boss 21 will deform accordingly. At this time, a buffer cavity is formed in the space enclosed by the groove 211 set on the surface of the buffer boss 21 and the lower tray 3. This buffer cavity can make full use of the space and provide a larger accommodation space for the buffer boss 21 during extrusion and deformation. At the same time, the accommodation cavity provides a soundproof environment to reduce the vibration transmission between the small tray and the buffer boss 21. When the vehicle encounters special working conditions such as bumps, the buffer cavity can absorb and buffer the vibration energy, prevent the propagation of vibration, and thus reduce the generation of abnormal noise. It should be noted that the present application does not limit the depth, width and shape of the groove 211, and grooves 211 of any shape and size are within the protection scope of the present application.

[0053] The number of the grooves 211 provided on the buffer boss 21 may be one or more, and the extending directions may also be multiple. In order to enable the buffer boss 21 to more effectively absorb and disperse the impact force when it is deformed by extrusion, in one embodiment of the present application, referring to Figure 5There are multiple grooves 211, and the multiple grooves 211 can evenly divide the surface of the buffer boss 21 into multiple planes, thereby increasing the buffer points when the buffer boss 21 and the lower tray 3 are in contact, and more evenly distributing the deformation of the buffer boss 21 during the pressing contact. At the same time, when the lower tray 3 and the buffer boss 21 are in pressing contact, these grooves 211 cooperate with the buffer pad 2 to further enhance the buffering characteristics of the buffer boss 21, so that the buffer boss 21 can more effectively absorb and disperse the impact force; when the vehicle is in some special road conditions, foreign objects such as water or gravel may enter the buffer boss 21, resulting in affecting the performance and stability of the bushing assembly, refer to Figure 5 , multiple grooves 211 are evenly distributed along the extension direction A of the buffer boss 21. When the lower tray 3 and the buffer boss 21 are squeezed and rubbed, the buffer cavity formed between the grooves 211 arranged along the extension direction A of the buffer boss 21 and the lower tray 3 can connect the inside and outside of the buffer pad. Under the vibration generated by the vehicle running, the buffer cavity formed between the grooves 211 and the lower tray 3 helps the bushing assembly to discharge the incoming water or gravel and other debris, thereby avoiding the friction noise caused by the entry of foreign matter and the impact on the performance of the bushing assembly.

[0054] It should be noted that the present application does not limit the specific number of the grooves 211, and the number can be increased or decreased according to the needs. Figure 5 The number of grooves 211 on each buffer boss 21 is set to 5, so that the functionality and stability of the system can be ensured on the basis of reducing the area of ​​compression contact between the buffer boss 21 and the lower tray 3.

[0055] Similarly, in order to further optimize the extrusion friction performance between the buffer boss 21 and the lower tray 3 and reduce problems such as friction noise, in one embodiment of the present application, the buffer boss 21 is also provided with a plurality of anti-slip protrusions 212 facing the side of the lower tray 3, and the plurality of anti-slip protrusions 212 are evenly distributed along the extension direction A of the buffer boss 21.

[0056] The design of the anti-skid protrusion 212 further increases the contact points between the buffer boss 21 and the lower tray 3, and the anti-skid protrusion 212 can first press against the surface of the lower tray 3 and deform when relative movement occurs between the bushing body 1 and the lower tray 3. In this way, when the sub-frame produces a relatively small movement amplitude, the anti-skid protrusion 212 can first contact the lower tray 3 to play a friction and buffering role, establish the cooperation between the buffer pad 2 and the lower tray 3, thereby reducing the abnormal noise caused by friction and vibration between the parts.

[0057] It should be noted that the shape and size of the anti-slip protrusion 212 are specifically designed according to needs, and the present application does not limit this. In an embodiment provided in the present application, refer to Figure 5The anti-skid protrusions 212 are hemispherical protrusions with a diameter of 1.5 mm and are evenly distributed on the surface of the buffer boss 21 except the area where the grooves 211 are located.

[0058] The present application embodiment provides a bushing assembly, referring to Figure 4 and Figure 6 The buffer boss 21 and the pressing portion 33 are arranged in alignment, and the pressing portion 33 is large enough to completely cover the corresponding buffer boss 21 .

[0059] The alignment of the buffer boss 21 and the pressing portion 33 can optimize the distribution of friction force. By completely covering the buffer boss 21 with the pressing portion 33, the friction force can be concentrated in the area covered by the pressing portion 33, so that the pressing contact area is clearly defined, reducing the distribution of friction force in other areas, thereby providing a stable pressing contact area and region, reducing the instability during pressing contact, and reducing the possibility of abnormal noise caused by friction.

[0060] In addition, when lateral movement occurs between the lower tray 3 and the bushing body 1, that is, when lateral displacement or movement inconsistent with the normal movement direction occurs between the lower tray 3 and the bushing body 1, since the pressing portion 33 completely covers its corresponding buffer boss 21, the pressing portion 33 will act as a stable contact plane to avoid abnormal contact between other structures, thereby effectively reducing the possibility of abnormal noise caused by lateral friction.

[0061] It should be added that, refer to Figure 2 , Figure 4 and Figure 6 In one embodiment of the present application, the lower tray 3 also includes a limiting portion 34, which is arranged in the central axis area of ​​the lower tray 3. The lower tray 3 is clamped on the inner sleeve 11 through the limiting portion 34. Correspondingly, a limiting interface 111 is arranged in the corresponding area of ​​the inner sleeve 11. The limiting interface 111 is adapted to the shape of the limiting portion 34 to achieve the relative position between the lower tray 3 and the bushing body 1, thereby limiting the relative position between the pressing portion 33 and the buffer boss 21, avoiding displacement between the pressing portion 33 and the buffer boss 21 due to the pressing contact, thereby enhancing the stability of the bushing assembly.

[0062] The relationship between the extended length of the buffer boss 21 and the extended length of the pressing portion 33 can be set according to the specific vehicle model and requirements. In comparison, the extended length of the buffer boss 21 and the extended length of the pressing portion 33 affect the force between the buffer boss 21 and the pressing portion 33. In order to make the pressing portion 33 and the buffer boss 21 fully contact and evenly force, in one embodiment of the present application, refer to Figure 4 and Figure 6Along the circumferential direction of the lower tray 3 , the extended length of the buffer boss 21 is consistent with the extended length of the pressing portion 33 .

[0063] The extended length of the buffer boss 21 is consistent with the extended length of the pressing portion 33, which can ensure complete contact between the pressing portion 33 and the buffer boss 21, and help to evenly distribute the pressure and friction between the pressing portion 33 and the buffer boss 21. At the same time, it can ensure that the pressing portion 33 and the buffer boss 21 can fully play the role of buffering and shock absorption, effectively and evenly absorb and disperse the impact force, and reduce the noise generated by the bushing assembly during movement.

[0064] It should be added that the number of the buffer bosses 21 and the number of the pressing portions 33 should correspond to each other to ensure that each buffer boss 21 has a pressing portion 33 arranged in alignment with it. The specific number is not limited. In one embodiment of the present application, refer to Figure 4 and Figure 6 The buffer bosses 21 are provided in four numbers and are evenly distributed along the surface of the buffer pad 2 . Correspondingly, the pressing portions 33 are also provided in four numbers so that the contact between the pressing portions 33 and the buffer bosses 21 is even.

[0065] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A bushing assembly, characterized in that: include: A bushing body (1), one end of the bushing body (1) being used for connection with the auxiliary frame, and the end surface of the other end being provided with a buffer pad (2); The lower tray (3) is flexibly connected to one end of the bushing body (1) provided with a buffer pad (2); the lower tray (3) is provided with an avoidance notch (32) and a pressing portion (33); the avoidance notch (32) is aligned with the bushing body (1); and the pressing portion (33) is used for pressing contact with the buffer pad (2).

2. The bushing assembly according to claim 1, characterized in that: The avoidance notch (32) is arranged at the outer edge of the lower tray (3), and its opening is away from the central axis of the lower tray (3).

3. The bushing assembly according to claim 2, characterized in that: There are a plurality of the avoidance notches (32), and the plurality of the avoidance notches (32) are evenly distributed along the circumference of the lower tray (3), and the pressing portion (33) is formed between two adjacent avoidance notches (32) on the lower tray (3).

4. The bushing assembly according to claim 1, characterized in that: The buffer pad (2) comprises a buffer boss (21), wherein the buffer boss (21) protrudes from a surface of the buffer pad (2) on a side close to the lower tray (3) toward the lower tray (3), and the surface of the buffer boss (21) is used for pressing contact with the lower tray (3).

5. The bushing assembly according to claim 4, characterized in that: A groove (211) is provided on the surface of the buffer boss (21) and is recessed toward one side of the bushing body (1); when the surface of the buffer boss (21) is in pressing contact with the lower tray (3), a buffer cavity is formed in the space enclosed by the lower tray (3) and the groove (211).

6. The bushing assembly according to claim 5, characterized in that: There are a plurality of grooves (211), and the plurality of grooves (211) are evenly distributed along the extension direction of the buffer boss (21).

7. The bushing assembly according to claim 4, characterized in that: The buffer boss (21) is also provided with a plurality of anti-slip protrusions (212) facing the side of the lower tray (3), and the plurality of anti-slip protrusions (212) are evenly distributed along the extension direction of the buffer boss (21).

8. The bushing assembly according to any one of claims 4 to 7, characterized in that: The buffer boss (21) and the pressing portion (33) are arranged in alignment, and the pressing portion (33) is large enough to completely cover the corresponding buffer boss (21).

9. The bushing assembly according to claim 8, characterized in that: Along the circumference of the lower tray (3), the extended length of the buffer boss (21) is consistent with the extended length of the pressing portion (33).

10. A vehicle, characterized in that: include: Subframe; The bushing assembly according to any one of claims 1 to 9, wherein the bushing assembly is connected to the subframe via the bushing body (1).

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