Connecting bushings, subframes, body assemblies, and transport vehicles

Abstract

This application relates to the field of vehicle technology and provides a connecting bushing, subframe, body assembly, and transport vehicle. The connecting bushing is applied to the bushing sleeve of the transport vehicle, and the inner wall of the bushing sleeve has a groove. The connecting bushing includes a first sleeve, a second sleeve, and a buffer member. The second sleeve is sleeved outside the first sleeve, and the buffer member is disposed between the first and second sleeves. The second sleeve includes a body portion and a protrusion portion. The body portion is arranged around the first sleeve, and the protrusion portion is disposed on the outer wall of the body portion and protrudes relative to the outer wall. When the connecting bushing is installed on the bushing sleeve, the protrusion portion is embedded in the groove of the bushing sleeve. By providing the above-mentioned protrusion portion, the friction between the connecting bushing and the bushing sleeve can be increased, and the safety performance of the transport vehicle is relatively high.

Description

Technical Field

[0001] This application relates to the field of vehicle engineering technology, and particularly to a connecting bushing, subframe, body assembly, and transport vehicle. Background Technology

[0002] The automotive industry is currently experiencing rapid development, and people's demands for vehicle ride comfort are gradually increasing. Connecting bushings are being used more and more widely in vehicles, positioned between the subframe and the body to mitigate impact vibrations and improve passenger comfort. However, as vehicle size and weight continue to increase, the instantaneous impact loads during driving also increase, making bushings more prone to detachment and failure, leading to abnormal noises and other problems, and ultimately posing safety hazards. Utility Model Content

[0003] In view of this, embodiments of this application provide a connecting bushing, subframe, body assembly, and transport vehicle, aiming to improve the problem of bushing failure affecting the user experience of the vehicle.

[0004] According to a first aspect of this application, an embodiment provides a connecting bushing applied to a bushing sleeve of a transport vehicle, the inner wall of which has a groove. The connecting bushing includes a first sleeve, a second sleeve, and a buffer member. The second sleeve is sleeved outside the first sleeve, and the buffer member is disposed between the first and second sleeves. The second sleeve includes a body portion and a protrusion portion. The body portion is circumferentially disposed outside the first sleeve, and the protrusion portion is disposed on the outer wall of the body portion and protrudes relative to the outer wall. When the connecting bushing is installed on the bushing sleeve, the protrusion portion is embedded in the groove of the bushing sleeve.

[0005] By setting the aforementioned protrusions, the friction between the connecting bushing and the bushing sleeve can be effectively increased, thereby reducing the problem of the connecting bushing coming off and improving the user experience of the transport vehicle.

[0006] In some embodiments, the protrusion is arranged around the outer periphery of the body portion along the circumference of the second sleeve.

[0007] By surrounding the body with protrusions, the friction between the connecting bushing and the bushing sleeve can be increased.

[0008] In some embodiments, there are multiple protrusions, which are arranged sequentially at intervals along the axial direction of the main body.

[0009] By setting multiple protrusions that are spaced apart along the axial direction of the main body, the contact area between the connecting bushing and the bushing sleeve can be increased, thereby increasing the friction between them and effectively preventing the connecting bushing from coming off.

[0010] In some embodiments, the connecting bushing further includes a gasket connected to one end of the first sleeve. The hardness of the gasket is greater than that of the first sleeve, and the gasket is used to contact the vehicle body.

[0011] By setting a shim, the contact friction between the bushing end face and the vehicle body can be increased. At the same time, the hardness of the shim is greater than that of the first sleeve, which can effectively prevent the first sleeve from wearing out and thus improve the service life of the connecting bushing.

[0012] In some embodiments, the side of the gasket facing away from the first sleeve has a textured structure that contacts the vehicle body.

[0013] By incorporating a textured structure into the bushing, the contact friction between the bushing and the vehicle body can be increased, thereby reducing the risk of bushing detachment.

[0014] In some embodiments, the first sleeve has a first through hole, and the gasket has a second through hole, the second through hole and the first through hole being connected and coaxially arranged. The textured structure includes multiple anti-loosening teeth, which are spaced apart from each other and arranged around the outer periphery of the second through hole.

[0015] By incorporating anti-loosening teeth surrounding the second through hole, the contact friction between the connecting bushing and the vehicle body can be increased, thereby reducing the risk of bushing detachment.

[0016] In some embodiments, the gasket includes a gasket body and a flanged portion. The gasket body is stacked on the end of the first sleeve, and the flanged portion protrudes towards the first sleeve relative to the gasket body. The first sleeve has a groove for engaging with the flanged portion.

[0017] By setting a flange and a groove that mates with the flange, the gasket and the first sleeve can be connected and fixed, effectively reducing the risk of the gasket coming off.

[0018] In some embodiments, the first sleeve is an aluminum tube and the gasket is a steel sheet.

[0019] By using the aforementioned materials for the first sleeve and gasket, the overall weight can be reduced while maintaining sufficient friction on the gasket, which is beneficial for achieving lightweight connection bushings.

[0020] In some embodiments, the buffer element protrudes at least partially beyond the second sleeve, and the end of the buffer element protruding beyond the second sleeve is also provided with friction teeth. The friction teeth are disposed at the end of the second sleeve and are used to abut against the bushing bracket of the transport vehicle.

[0021] Setting friction teeth helps to increase the friction between the connecting bushing and the bushing support, thereby effectively reducing the risk of bushing detachment.

[0022] According to a second aspect of this application, an embodiment of this application provides a subframe, which includes a connecting bushing and a frame frame provided in any of the above embodiments. The frame frame includes a main frame and a bushing sleeve connected to the main frame. The inner peripheral wall of the bushing sleeve is provided with a groove, the connecting bushing is installed in the bushing sleeve, and the protrusion is embedded in the groove.

[0023] According to a third aspect of this application, an embodiment of this application provides a vehicle body assembly, which includes the aforementioned fasteners, subframe, and vehicle body. The fasteners pass through connecting bushings to connect the subframe and the vehicle body.

[0024] In some embodiments, the vehicle assembly further includes a bushing bracket, which includes a connecting portion and a bracket body. The connecting portion is connected to the connecting bushing and the connecting bushing is stacked on the bracket body.

[0025] According to a fourth aspect of this application, an embodiment of this application provides a transport vehicle that includes the aforementioned vehicle body assembly and power system.

[0026] Compared to existing technologies, this application provides a connecting bushing comprising a first sleeve, a second sleeve, and a bushing sleeve. By providing a protrusion on the second sleeve, the protrusion can embed into a groove in the inner wall of the bushing sleeve of the transport vehicle to hold the connecting bushing in place, reducing the risk of the connecting bushing detaching and thus improving the safety of the transport vehicle. Simultaneously, the nested cooperation of the protrusion and the groove also increases the friction between the connecting bushing and the bushing sleeve, further reducing the risk of bushing detachment and improving the reliability of the transport vehicle. Furthermore, it avoids problems such as abnormal noise caused by insufficient friction between the connecting bushing and the bushing sleeve, or detachment failure caused by deformation of the connecting bushing due to temperature changes at low temperatures, thus improving the user experience and safety of the transport vehicle. Attached Figure Description

[0027] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a connecting bushing provided in an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the subframe structure provided in one embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the structure of a vehicle body assembly provided in one embodiment of this application.

[0031] Figure 4 yes Figure 3 The diagram shows the structural connection between the connecting bushing and the bushing bracket in the vehicle body assembly.

[0032] Figure 5 This is a schematic diagram of the structure of a transport vehicle provided in one embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the connection between the connecting bushing and the bushing bracket provided in an embodiment of this application.

[0034] Figure 7 yes Figure 6 The diagram shows a cross-sectional view along line II when the bushing and bushing support are connected.

[0035] Figure 8 yes Figure 4 The diagram shows the structure of the bushing sleeve in the vehicle body assembly.

[0036] Figure 9 yes Figure 1 The diagram shows the structure of the gasket in the connecting bushing.

[0037] Figure 10 yes Figure 1 A magnified schematic diagram of a portion of the connecting bushing shown.

[0038] Figure 11 This is a test diagram of the extrusion force of a conventional bushing and bushing sleeve provided in the embodiments of this application.

[0039] Figure 12 This is a test diagram of the pressure exerted on the connecting bushing and bushing sleeve of this application.

[0040] Attached icon number

[0041] 100. Connecting bushing; 200. Subframe; 300. Body assembly; 400. Transport vehicle; 10. First sleeve; 11. Slot; 20. Second sleeve; 21. Protrusion; 22. Body part; 201. Bushing sleeve; 202. Main frame; 221. First through hole; 2001. Frame frame; 2011. Groove; 30. Buffer; 31. First buffer part; 32. Second buffer part; 301. Bushing bracket; 302. Body; 303. Fastener; 40. Gasket; 41. Gasket body; 42. Flanged part; 43. Second through hole; 44. Texture structure; 441. Anti-loosening tooth; 50. Friction tooth. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that when a component / part is said to be "fixed to" another component / part, it can be directly on the other component / part or there may be an intermediate component / part. When a component / part is considered to be "connected to" another component / part, it can be directly connected to the other component / part or there may be an intermediate component / part present; also, when a component / part is considered to be "connected to" another component / part, it can be integrally formed or assembled with the other component / part. When a component / part is considered to be "set on" another component / part, it can be directly set on the other component / part or there may be an intermediate component / part present.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] Please see Figure 1 and Figure 4 This application provides a connecting bushing 100, which is applied to a transport vehicle 400. Figure 5 ) bushing sleeve 201 ( Figure 4 The inner wall of the bushing sleeve 201 is provided with a groove 2011. In this embodiment, the transport vehicle 400 can be a vehicle. The connecting bushing 100, as a buffer element, can be connected to the frame to absorb and buffer the impact force transmitted through the frame 2001, thereby reducing the impact on the transport vehicle 400 and the user, and improving the user's experience with the transport vehicle 400. In addition, the connecting bushing 100 is also used to allow the transport vehicle 400 to make a certain range of elastic movements on the frame to adapt to various working conditions of the transport vehicle 400 during movement, such as torsional deformation during turning, acceleration, or braking.

[0046] It should be noted that the connecting bushing 100 is not limited to serving as a buffer element for the vehicle in this embodiment, but can also serve as a buffer element for other transport vehicles 400, such as ships and aircraft. This embodiment does not impose specific limitations on this. In addition, the connecting bushing 100 can also be used as a connector or buffer element 30 for other components. For example, the connecting bushing 100 can be installed on rollers, joints, and other components to mitigate the impact generated during movement and maintain the stable operation of the equipment.

[0047] Please see Figure 2 and Figure 4 This embodiment provides a subframe 200 including the aforementioned connecting bushing 100. The subframe 200 is used to support and install key components of the vehicle, such as the suspension system, steering system, and braking system. Simultaneously, the subframe 200 also enhances the overall rigidity of the transport vehicle 400, reduces deformation and swaying of the vehicle body 302, and improves handling stability. The subframe 200 may include a frame 2001, which serves as the basic skeleton of the subframe 200. It includes a main frame 202 and bushing sleeves 201 connected to the main frame 202. This embodiment does not limit the specific structure of the main frame 202 and can be configured according to actual needs.

[0048] The bushing sleeve 201 is used to install the connecting bushing 100. In this embodiment, the bushing sleeve 201 is generally a hollow annular structure, and the connecting bushing 100 can be pressed into the bushing sleeve 201 by means of stamping or other methods. The inner diameter of the bushing sleeve 201 is approximately the same as the outer diameter of the connecting bushing 100, so that the connecting bushing 100 can be interference-fitted with the inner wall of the bushing sleeve 201 to reduce the risk of the connecting bushing 100 detaching. The inner peripheral wall of the bushing sleeve 201 is also provided with a groove 2011. When the connecting bushing 100 is installed in the bushing sleeve 201, the groove 2011 is used to nest and cooperate with the protrusion 21 of the connecting bushing 100 to improve the connection firmness between the bushing sleeve 201 and the connecting bushing 100, thereby increasing the friction between the connecting bushing 100 and the bushing sleeve 201, and further reducing the risk of the connecting bushing 100 detaching and failing.

[0049] Please see Figure 3 This application also provides a vehicle body assembly 300, including the aforementioned subframe 200, fastener 303, and vehicle body 302. The vehicle body 302 has a receiving space for carrying components. The fastener 303 is used to connect the subframe 200 and the vehicle body. Specifically, one end of the fastener 303 is connected to the vehicle body 302, and the other end is inserted into the connecting bushing 100 to achieve a fixed connection between the subframe 200 and the vehicle body 302. This embodiment does not limit the specific structure of the fastener 303; for example, the fastener 303 can be a connecting shaft or a threaded fastener.

[0050] The body assembly 300 may also include a bushing bracket 301, one end of which is connected to a connecting bushing, and the other end is used to connect external components to connect the subframe 200 to other components. As an example, the bushing bracket 301 may include a bracket connecting portion 3011 and a bracket body 3012. The bracket connecting portion 3011 may be a protrusion or a groove, and it is used to engage with the connecting bushing 100. When the connecting bushing 100 is installed in the bushing bracket 301, one end of the connecting bushing 100 overlaps the bracket body 3012. As an example, the bracket connecting portion 3011 may be inserted into the connecting bushing 100 so that the end of the connecting bushing 100 overlaps the bracket body 3012. The bracket connecting portion 3011 may also have a through hole for fasteners such as bolts and screws to pass through.

[0051] Please see Figure 5 This application embodiment also provides a transport vehicle 400, which may be a vehicle, including the aforementioned body assembly 300 and power system 401. The power system 401 is disposed inside the body assembly 300 and is used to provide power to the body assembly 300. The power system 401 may include an engine, transmission, etc., and this embodiment does not impose specific limitations on this. It is understood that, depending on the different operating environments of the transport vehicle 400, it may also be a vehicle, ship, aircraft, etc., and this embodiment does not impose specific limitations on this. For ease of explanation, the transport vehicle 400 in this embodiment is a vehicle.

[0052] Please refer to it again. Figure 1 and Figure 4 In this embodiment, the connecting bushing 100 may include a first sleeve 10, a second sleeve 20, and a buffer member 30. The second sleeve 20 of the connecting bushing 100 is sleeved outside the first sleeve 10, and the buffer member 30 is disposed between the first sleeve 10 and the second sleeve 20. The second sleeve 20 includes a body portion 22 and a protrusion 21. The body portion 22 is arranged around the first sleeve 10, and the protrusion 21 is disposed on the outer wall of the body portion 22 and protrudes relative to the wall. When the connecting bushing 100 is installed on the bushing sleeve 201, the protrusion 21 is embedded in the groove 2011 of the bushing sleeve 201.

[0053] This embodiment does not limit the specific shape of the protrusion 21 and the groove 2011. For example, the number of protrusions 21 can be multiple or one. Specifically, the protrusion 21 can be multiple dot-shaped protrusions, which can be randomly distributed on the outer wall surface of the second sleeve 20. The protrusion 21 can also be annular protrusions, which are arranged around the outer wall surface of the second sleeve 20. The protrusion 21 can also be wavy stripe protrusions, strip-shaped protrusions, etc. The shape of the groove 2011 can be adapted to the shape of the protrusion. The size of the protrusion 21 at different positions on the second sleeve 20 can be the same or different. This embodiment does not impose specific limitations on this and can be set according to actual usage requirements.

[0054] By providing a protrusion 21 on the second sleeve 20, the protrusion 21 can be embedded into the groove 2011 on the inner wall of the bushing sleeve 201 of the transport vehicle 400 to hold the connecting bushing 100 in place, reducing the risk of the connecting bushing 100 coming off and failing, thereby improving the safety of the transport vehicle 400. Simultaneously, the nested cooperation of the protrusion 21 and the groove 2011 also increases the friction between the connecting bushing 100 and the bushing sleeve 201, further reducing the risk of the bushing 100 coming off and failing, and improving the reliability of the transport vehicle 400. Furthermore, it can avoid problems such as abnormal noise caused by insufficient friction between the connecting bushing 100 and the bushing sleeve 201, or separation failure caused by deformation of the connecting bushing 100 due to temperature changes at low temperatures, thus improving the user experience and safety of the transport vehicle 400.

[0055] The specific components and structure of the connecting bushing 100100 will be introduced one by one below.

[0056] Please see Figure 1 ,and Figure 7In this embodiment, the connecting bushing 100 is generally arranged in an annular cylindrical shape, and the first sleeve 10 is a hollow cylindrical structure, which serves as the internal support structure of the connecting bushing 100 to transmit or bear axial loads and ensure the overall stability of the connecting bushing 100. The first sleeve 10 is also used to cooperate with the fastener 303 to connect the subframe 200 and the body 302. Specifically, the first sleeve 10 is provided with a mating part (not shown in the figure), and the fastener 303 may be provided with a connecting part (not shown in the figure). When the fastener 303 is installed on the connecting bushing 100, the connecting part and the mating part correspond and connect. As an example, the mating part can be either a groove or a protrusion, and the connecting part is either a groove or a protrusion, so that the mating part can engage with the connecting part to achieve a fixed connection between the connecting bushing 100 and the bushing bracket 301. As another example, fastener 303 can be a screw, bolt, or connecting shaft, with one end connected to the vehicle body 302 and the other end passing through the connecting bushing 100 to achieve a fixed connection between the connecting bushing 100 and the vehicle body 302. The first sleeve 10 is also used to connect with the bushing bracket 301 to connect and fix the connecting bushing to other mounting components. This embodiment does not limit the specific type of mounting components and can be set according to actual usage requirements.

[0057] In this embodiment, the second sleeve 20 is generally cylindrical and is fitted over the first sleeve 10 to form a double-layer structure for the connecting bushing 100. This enhances the overall structural strength of the connecting bushing 100 and protects the first sleeve 10. Specifically, the second sleeve 20 can be a nylon sleeve or a rubber sleeve, effectively absorbing impacts and vibrations during the transport vehicle's operation and reducing the risk of the connecting bushing 100 coming loose and failing.

[0058] In this embodiment, the second sleeve 20 is used to mate with the inner wall of the bushing sleeve 201 to achieve the connection and fixation of the connecting bushing 100 and the bushing sleeve 201. Specifically, the second sleeve 20 includes a body portion 22 and a protrusion portion 21. The body portion 22 is arranged around the outside of the first sleeve 10, and the protrusion portion 21 is disposed on the outer wall of the body portion 22 and protrudes relative to the outer wall. The size of the body portion 22 is approximately the same as the inner diameter of the hole in the bushing sleeve 201, so that when the connecting bushing 100 is installed in the bushing sleeve 201, the body portion 22 fits against the inner wall of the bushing sleeve 201 and is held in place by the bushing sleeve 201 under the action of friction, thereby preventing the connecting bushing 100 from coming off.

[0059] In this embodiment, the protrusion 21 is generally annular and integrally formed with the main body 22. The protrusion 21 is used to cooperate with the groove 2011 of the bushing sleeve 201 to further increase the friction between the connecting bushing 100 and the bushing sleeve 201, thereby reducing the risk of the connecting bushing 100 coming off and failing, and improving the reliability of the transport vehicle 400. At the same time, it can also avoid the abnormal noise problem caused by insufficient friction between the connecting bushing 100 and the bushing sleeve 201, and improve the user experience of the transport vehicle 400.

[0060] In some embodiments, the maximum outer diameter of the protrusion 21 can be greater than the maximum inner diameter of the groove 2011, so that the protrusion 21 can be interference-fitted with the inner wall of the groove 2011 to improve the friction between the two, effectively preventing the protrusion 21 from loosening or separating from the groove 2011, and ensuring the reliability of the connection.

[0061] It should be noted that the protrusion 21 and the body 22 can be welded from the same material to form a whole, or they can be welded from different materials to form a whole. This embodiment does not impose specific limitations on this. As an example only, the hardness of the protrusion 21 can be greater than that of the body 22 to enhance the wear resistance and impact resistance of the protrusion 21, thereby preventing the connecting bushing 100 from coming off and failing.

[0062] Please see Figure 7 and Figure 8Specifically, when the connecting bushing 100 is installed on the bushing sleeve 201, the protrusion 21 is embedded in the groove 2011 of the bushing sleeve 201 to prevent the connecting bushing 100 from shifting or falling off due to axial force or vibration. This embodiment does not limit the specific shape and position of the protrusion 21 and the groove 2011. As an example, the protrusion 21 may surround the outer periphery of the body portion 22 along the circumference of the second sleeve 20, and the groove 2011 may be formed in the circumference of the inner wall of the bushing sleeve 201. In other words, the circumferentially surrounding protrusion 21 and the groove form a 360° full-circumferential locking structure. On the one hand, this increases the contact area between the connecting bushing 100 and the bushing sleeve 201, thereby improving the friction between them. This effectively resists the torsional torque generated during the operation of the transport vehicle 400, preventing relative rotation between the connecting bushing 100 and the sleeve, ensuring the connection stability of the connecting bushing 100 and the bushing sleeve 201, and reducing the risk of loosening of the connecting bushing 100. On the other hand, it forms a continuous and uniform stress area circumferentially at the connection between the connecting bushing 100 and the bushing sleeve 201, thereby reducing the risk of deformation of the connecting bushing 100 or the bushing sleeve 201 due to local stress concentration and improving the overall service life. It should be noted that the number of protrusions 21 can be one, with one protrusion 21 surrounding the outer periphery of the body part 22. The protrusion 21 can also include multiple substructures, such as protrusions. Multiple substructures are spaced apart from each other and arranged circumferentially along the main body 22, which can form axial mechanical support and reduce the risk of the connecting bushing 100 coming off. This embodiment does not limit the specific arrangement of the multiple substructures and can be set according to actual usage requirements.

[0063] As another example, the size of the protrusion 21 can be different at different positions in the circumferential direction of the second sleeve 20. For example, the protrusion 21 has a width dimension along the axial direction of the second sleeve 20, which can intersect with the circumferential direction. The width dimension of the protrusion 21 is not equal everywhere. The size of the groove 2011 on the bushing sleeve 201 is set to correspond to the size of the protrusion 21, which can prevent the connecting bushing 100 from rotating circumferentially along the bushing sleeve 201 under the action of external force, thereby reducing the risk of the connecting bushing 100 loosening, falling out and failing.

[0064] Furthermore, in some embodiments, to further improve the friction between the connecting bushing 100 and the bushing sleeve 201, the number of protrusions 21 can be multiple, with the multiple protrusions 21 arranged sequentially at intervals along the axial direction of the body portion 22. That is, the multiple protrusions 21 increase the contact area between the connecting bushing 100 and the bushing sleeve 201 in the axial direction of the body portion 22, thereby further improving the friction between the connecting bushing 100 and the bushing sleeve 201 and reducing the risk of the connecting bushing 100 detaching. Simultaneously, the multiple protrusions 21 also form a multi-level locking structure, further improving the reliability and adaptability of the connecting bushing 100. For example, when one protrusion 21 fails due to long-term wear or accidental impact, the remaining protrusions 21 can still maintain their locking function, preventing the connecting bushing 100 from falling off entirely to meet the safety protection requirements under heavy-duty transportation or extreme road conditions.

[0065] In some embodiments, the surface of the protrusion 21 may also be provided with a friction structure, such as a bump or texture protruding relative to the surface of the protrusion 21, and the inner wall of the groove 2011 may be provided with a grid-like texture, a diagonal texture, or a striped texture, with the bump or texture embedded in the striped texture to further improve the friction between the protrusion 21 and the groove.

[0066] Please see Figure 1 and Figure 7 In this embodiment, the buffer 30 is disposed between the first sleeve 10 and the second sleeve 20 to reduce the vibration and abnormal noise experienced by the connecting bushing 100 during use. The buffer 30 is specifically an elastic medium, such as rubber, plastic, or a mechanical spring. It effectively absorbs the vibration energy generated during vehicle operation, such as road bumps and wheel vibrations. Through its own elastic deformation, it disperses the vibration and reduces the amplitude of vibration transmitted to the vehicle body 302, thereby improving the comfort of the user. Simultaneously, the rubber body is vulcanized and bonded to the first sleeve 10 and the second sleeve 20, which improves the overall structural strength of the connecting bushing 100.

[0067] It should be noted that the buffer 30 can be clamped and held between the first sleeve 10 and the second sleeve 20, or it can be at least partially spaced from the first sleeve 10 and the second sleeve 20. This embodiment does not impose specific limitations on this and can be configured according to actual usage requirements. In this embodiment, the buffer 30 is generally arranged in an annular cylindrical shape, having a first buffer portion 31 and a second buffer portion 32. The first buffer portion 31 is attached to the outer wall of the first sleeve 10, and the second buffer portion 32 is attached to the inner wall of the second sleeve 20 and connected to the second sleeve 20 to absorb vibration energy from different directions and different parts, thereby more effectively reducing vibration intensity. A gap 33 is formed between the first buffer portion 31 and the second buffer portion 32 to adjust the stiffness of the connecting bushing. In addition, the gap 33 also allows the first buffer portion 31 or the second buffer portion 32 to undergo a certain degree of elastic deformation, increasing the buffer space and playing a role in isolating vibration, further improving the shock absorption effect.

[0068] In some embodiments, the buffer 30 is also used to cooperate with the bushing bracket 301 to improve the connection stability between the bushing bracket 301 and the connecting bushing 100. Specifically, the buffer 30 protrudes at least partially from the end of the second sleeve 20 that is used to connect with the bushing bracket 301, so that when the connecting bushing 100 is installed on the bushing bracket 301, the buffer 30 can contact and press against the bracket body 3012 of the bushing bracket 301. More specifically, the end of the buffer 30 that protrudes beyond the second sleeve 20 is provided with friction teeth 50. When the connecting bushing 100 and the bushing bracket 301 are connected, the friction teeth 50 abut against the surface of the bracket body 3012. There can be multiple friction teeth 50. Multiple friction teeth 50 form multi-point contact with the surface of the bushing bracket 301, which significantly improves the static friction through mechanical engagement, effectively suppressing relative displacement under vibration or impact, and ensuring the connection stability between the connecting bushing 100 and the bushing bracket 301.

[0069] Please see Figure 1 , Figure 7 and Figure 9Since the connecting bushing 100 is connected between the vehicle body 302 and the subframe 200 by fasteners 303, in order to improve the friction between the connecting bushing 100 and the vehicle body 302, in this embodiment, the connecting bushing 100 further includes a gasket 40. The gasket 40 is connected to one end of the first sleeve 10 for contact with the vehicle body 302 of the transport vehicle 400. Specifically, the gasket 40 is located at the end of the first sleeve 10 away from the bushing bracket 301 or away from the friction teeth 50. The gasket 40 may include a gasket body 41 and a flanged portion 42. The gasket body 41 is generally flat and extends generally radially along the first sleeve 10, and is used to overlap the end of the first sleeve 10 and contact the vehicle body 302. The first sleeve 10 may have a first through hole 221, and the washer body 41 of the gasket 40 may have a second through hole 43. The second through hole 43 and the first through hole 221 are connected and coaxially arranged to provide a through channel for connecting components such as bolts and pins, ensuring a reliable connection between the bushing and the external bracket or the vehicle body 302. For example, the bolt passes through the through holes of the first sleeve 10 and the gasket 40 and is locked with the nut to form a rigid fixing structure, thereby improving the connection stability between the connecting bushing 100 and the vehicle body 302.

[0070] Please see Figure 1 , Figure 9 and Figure 10 The flange 42 protrudes axially toward the first sleeve 10 relative to the gasket body 41 for connection with the first sleeve 10. Specifically, the first sleeve 10 is provided with a groove 11 corresponding to the flange 42. When the gasket 40 is installed in the first sleeve 10, the flange 42 is held in the groove 11 to achieve a fixed connection between the gasket 40 and the first sleeve 10. This embodiment does not limit the specific position and number of the flange 42 on the gasket body 41, and can be set according to actual usage requirements.

[0071] In this embodiment, the hardness of the gasket 40 can be greater than that of the first sleeve 10. This allows the high-hardness gasket 40 to resist wear caused by long-term friction and impact between the vehicle body 302 and the connecting bushing 100, ensuring friction between them. Furthermore, it prevents the vehicle body 302 from contacting the first sleeve 10, thus extending its service life. Additionally, as a detachable independent component, when the contact surface wear reaches a threshold, only the gasket 40 needs to be replaced, rather than the entire connecting bushing 100, reducing maintenance costs.

[0072] As a specific example, the gasket 40 can be a steel sheet, the first sleeve 10 can be an aluminum tube, and the gasket 30 can be a steel sheet. This ensures sufficient friction between the connecting bushing 100 and the body 302 while reducing the overall weight of the structure, which is beneficial for achieving lightweighting of the connecting bushing 100 and reducing production costs.

[0073] Please see Figure 8 In this embodiment, the gasket 40 has a textured structure 44 on the side opposite to the first sleeve 10 (i.e., the side in contact with the vehicle body 302). The textured structure 44 is used to further improve the friction between the gasket 40 and the vehicle body 302. Specifically, the textured structure 44 protruding or recessing relative to the gasket body 41 can increase the contact area between the gasket and the vehicle body 302 and improve the roughness of the contact surface, thereby reducing the risk of slippage between the gasket 40 and the vehicle body 302 due to vibration or impact. This embodiment does not limit the specific shape of the textured structure 44 and can be set according to actual usage requirements. As an example only, the textured structure 44 may include multiple protruding anti-loosening teeth 441, which are spaced apart from each other and arranged around the second through hole 43. It is understood that in other embodiments, the textured structure 44 may also be other structures, such as wavy bumps, striped protrusions, grid-like grooves, etc.

[0074] That is, in this application, the connecting bushing 100 is pressed into the bushing sleeve 201 of the frame 2001 by stamping or other means and combined with the frame 2001 to form a subframe 200. The subframe 200 is fixedly connected to the body 302 by fasteners 303. The subframe 200 can also be connected to other mounting components through bushing brackets 301. When the connecting bushing 100 is installed on the bushing sleeve, the protrusion 21 and the groove 2011 of the bushing sleeve 201 are nested together to increase the contact area and contact friction between them, thereby improving the connection stability between the connecting bushing 100 and the bushing sleeve 201. The gasket 40 can be provided at the end of the first sleeve to prevent the first sleeve 10 from contacting the body 302. At the same time, the textured structure on the gasket 40 is used to engage tightly with the body 302, reducing the risk of the connecting bushing 100 coming off and failing. A buffer is placed between the first sleeve and the second sleeve to reduce the vibration of the connecting bushing. The end of the buffer away from the gasket 40 protrudes from the second sleeve and is provided with friction teeth 50. The friction teeth 50 are used to engage and abut against the bushing bracket 301, further reducing the risk of the connecting bushing 100 coming off and failing, thereby improving the user experience.

[0075] Please see Figure 11 and Figure 12 , Figure 11 The diagram shows a conventional bushing compression test. The conventional bushing does not have the protrusion 21 of this application, and the bushing sleeve 201 does not have the groove 2011 corresponding to the protrusion 21 (the rib in the figure) of this application. The compression force required for the two to be disengaged is 8.64KN. Figure 12The diagram shows a test result of the compression force of the connecting bushing 100 provided in this application embodiment. When the connecting bushing 100 is installed on the bushing sleeve 201, the compression force required for the protrusion 21 and the groove 2011 of the bushing sleeve 201 to disengage is 10.03 kN. That is, the compression force of the connecting bushing 100 and bushing sleeve 201 provided in this application is greater than the compression force required for ordinary bushings and bushing sleeves 201 to disengage. In other words, the friction between the connecting bushing and bushing sleeve of this application is greater, which can effectively reduce the risk of disengagement failure of the connecting bushing. Furthermore, the connecting bushing 100 of this application can withstand a greater load to improve the overall performance of the connecting bushing.

[0076] In summary, the connecting bushing 100 provided in this application includes a first sleeve 10, a second sleeve 20, and a buffer member 30. By providing a protrusion 21 on the second sleeve 20, the protrusion 21 can be embedded into a groove 2011 on the inner wall of the bushing sleeve 201 of the transport vehicle 400 to hold the connecting bushing 100 in place, reducing the risk of the connecting bushing 100 coming off and failing, thereby improving the safety of the transport vehicle 400. Simultaneously, the nested cooperation of the protrusion 21 and the groove 2011 can also increase the friction between the connecting bushing 100 and the bushing sleeve 201, further reducing the risk of the connecting bushing 100 coming off and failing, and improving the reliability of the transport vehicle 400. Furthermore, it can avoid problems such as abnormal noise caused by insufficient friction between the connecting bushing 100 and the bushing sleeve 201, or separation failure caused by deformation of the connecting bushing 100 due to temperature changes at low temperatures, thus improving the user experience and safety of the transport vehicle 400.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A connecting bush, characterized in that The connecting bushing is used in the bushing sleeve of the transport vehicle, and the inner wall of the bushing sleeve is provided with a groove; The connecting bushing includes a first sleeve, a second sleeve, and a buffer member. The second sleeve is sleeved outside the first sleeve, and the buffer member is disposed between the first sleeve and the second sleeve. The second sleeve includes a body portion and a protrusion portion. The body portion is arranged around the outside of the first sleeve, and the protrusion portion is disposed on the outer wall of the body portion and protrudes relative to the outer wall. When the connecting bushing is installed on the bushing sleeve, the protrusion portion is embedded in the groove of the bushing sleeve.

2. The connecting bushing of claim 1, wherein, The protrusion is arranged around the outer periphery of the body portion along the circumference of the second sleeve.

3. The connecting bushing of claim 2, wherein, The number of protrusions is multiple, and the multiple protrusions are arranged at intervals along the axial direction of the connecting bushing.

4. The connecting bushing of claim 1, wherein, The connecting bushing also includes a gasket, which is connected to one end of the first sleeve. The hardness of the gasket is greater than that of the first sleeve, and the gasket is used to contact the vehicle body of the transport vehicle.

5. The connecting bushing of claim 4, wherein, The gasket has a textured structure on the side opposite to the first sleeve for contact with the vehicle body.

6. The connecting bushing of claim 5, wherein, The first sleeve has a first through hole, and the gasket has a second through hole. The second through hole and the first through hole are connected and coaxially arranged. The textured structure includes a plurality of anti-loosening teeth, which are spaced apart from each other and arranged around the outer periphery of the second through hole.

7. The connecting bushing of claim 4, wherein, The gasket includes a gasket body and a flanged portion. The gasket body is stacked on the end of the first sleeve, and the flanged portion protrudes towards the first sleeve relative to the gasket body. The first sleeve is provided with a groove, and the groove and the flanged portion are engaged.

8. The connecting bushing of claim 4, wherein, The first sleeve is an aluminum tube, and the gasket is a steel sheet.

9. The connecting bushing of any one of claims 1 to 8, wherein, The buffer element protrudes at least partially beyond the second sleeve, and one end of the buffer element protruding beyond the second bushing is provided with friction teeth, which are used to abut against the bushing bracket of the transport vehicle.

10. A subframe characterized by include: The connecting bushing as described in any one of claims 1 to 9; and A vehicle frame, comprising a main frame and a bushing sleeve connected to the main frame, wherein the inner peripheral wall of the bushing sleeve is provided with a groove, the connecting bushing is installed in the bushing sleeve, and the protrusion is embedded in the groove.

11. A vehicle body assembly characterized by, Includes a vehicle body, fasteners, and a subframe as described in claim 10, wherein the fasteners pass through the connecting bushing to connect the subframe and the vehicle body.

12. The body assembly of claim 11, wherein, The vehicle assembly also includes a bushing bracket, which includes a bracket connecting portion and a bracket body. The bracket connecting portion is connected to the connecting bushing and the connecting bushing is stacked on the bracket body.

13. A transport vehicle, characterized in that It includes a powertrain system and a body assembly as described in claim 10, wherein the powertrain system is disposed in the body assembly.

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