Sheath, transmission system and vehicle

Abstract

The application provides a sheath, a transmission system and a vehicle, and belongs to the technical field of automobile parts. The sheath comprises a first connecting body, a protection body and a second connecting body which are sequentially distributed along a first direction. Structural ribs are formed on one side of the corrugated section, and uneven storage areas are formed on the other side. The structural ribs can optimize the contact mode of adjacent corrugated sections from surface contact to line contact, effectively reduce the contact area, reduce the extrusion friction resistance between the corrugated sections under large swing angle working conditions, and inhibit abnormal noise from the root. The storage areas can separate and store a large area of lubricant, avoid the large-area falling of lubricant due to extrusion of the sheath under swing angle working conditions, improve the poor adhesion of the lubricant on the surface of the traditional sheath, fully play the friction-reducing effect of the lubricant, and reduce the friction abnormal noise.

Description

Technical Field

[0001] This application belongs to the field of automotive parts technology, and more specifically, relates to a sheath, transmission system and vehicle. Background Technology

[0002] Universal joints are key components in vehicle drive mechanisms that enable variable-angle power transmission. They allow the included angle between connected parts to vary within a certain range to adapt to power transmission requirements and to cope with angular changes caused by the vehicle's steering and vertical movement. To ensure the continuous and stable operation of universal joints, they need to be lubricated with lubricating oil and protected from foreign object intrusion. Therefore, universal joint sleeves are installed on the universal joints to achieve the dual functions of preventing lubricating oil leakage and preventing foreign object intrusion.

[0003] However, existing universal joint bushings have several problems in practical use: Firstly, the dense and smooth surface of the bushing is not conducive to the precipitation and adhesion of wax-based lubricant. When the crests and troughs undergo extrusion, the uniform wax-based lubricant on the bushing surface is kneaded into strips or flakes and remains, resulting in a significant reduction in its adhesion. After the vehicle has driven through water, the residual wax-based lubricant on the surface is easily washed away by the water flow, and the splashing water droplets remaining on the bushing surface further increase the friction between the crests and troughs, causing the two contact surfaces to slide under pressure. In addition, the bushing has a hollow internal structure, and the resulting vibrations are amplified through the cavity, ultimately causing abnormal noise. Secondly, when the friction-reducing layer on the bushing surface fails to precipitate, or when the friction-reducing layer is worn down after the vehicle has been running for a certain period of time and the internal grease is not replenished in time, the friction-reducing agent on the bushing surface will form a vacuum. When the universal joint swings to its limit angle, extrusion friction will occur between the bushings. If the extrusion stress is too high, it will not only aggravate abnormal noise but also shorten the service life of the bushing. Meanwhile, the existing sheath has corrugated tubes arranged in sequence with close spacing. When rotating at a large swing angle, the mutual friction and compression of the corrugated tubes in the local space are more severe, further increasing the compressive stress and aggravating the problems of abnormal noise and lifespan reduction. Utility Model Content

[0004] The purpose of this application is to provide a protective sleeve, a transmission system, and a vehicle, which aims to solve the problems of existing protective sleeves easily generating abnormal noise under large swing angle conditions, and the poor adhesion and easy loss of surface lubricant.

[0005] In a first aspect, embodiments of this application provide a protective sleeve, including a first connector, a protective body, and a second connector arranged sequentially along a first direction. The first connector is used to connect with a drive shaft, and the second connector is used to connect with a housing. The protective body includes a plurality of corrugated sections arranged sequentially along the first direction. One side of each corrugated section has a structural rib, and the other side forms an uneven storage area for storing lubricant.

[0006] The beneficial effects of the protective sleeve provided in this application are as follows: Compared with the prior art, the corrugated joint of the protective body has structural ribs on one side and an uneven storage area on the other side. The structural ribs optimize the contact between adjacent corrugated joints from surface contact to line contact, effectively reducing the contact area and lowering the extrusion friction resistance between corrugated joints under large swing angle conditions, thus suppressing abnormal noise at the source. The storage area can separate and store a large area of ​​lubricant, preventing large-area lubricant detachment due to extrusion under large swing angle conditions. It also improves the problem of poor lubricant adhesion on the surface of traditional protective sleeves, giving full play to the friction-reducing effect of the lubricant and reducing friction noise. In addition, the structural ribs of the corrugated joint and the uneven storage area can form a reinforced structure, significantly improving the structural strength of the protective sleeve itself compared with the original smooth structure. Under the same bending angle, the stress value of the protective sleeve is significantly lower than that of the prior art. At the same time, this solution can also play an impact protection role, enhancing the protective sleeve's resistance to bumps and impacts in harsh chassis environments, preventing protective sleeve failure and extending service life. This application not only solves the core problems of frequent abnormal noise and easy lubricant loss under large swing angle conditions of existing sheaths, but also improves the structural stability and resistance to harsh environments of the sheath, ensuring its long-term reliable sealing and protection function for the universal joint, thereby ensuring the stable operation of the transmission system and the vehicle. In conjunction with the first aspect, in one possible implementation, the surface of the corrugated joint has a plurality of the structural ribs, and the plurality of structural ribs are distributed at intervals along the circumferential direction of the corrugated joint.

[0007] In the above technical solution, the circumferentially spaced structural ribs optimize the contact method into multiple line or point contacts. This ensures even distribution of contact pressure, preventing localized aggravation of wear, while also providing sufficient deformation space for sheath bending, ensuring flexible rotation under large swing angle conditions. Simultaneously, it reduces extrusion friction intensity to suppress abnormal noise. Compared to the annular structural rib solution, this not only avoids the stress concentration caused by circumferential contact between adjacent corrugated sections, which hinders sheath bending deformation, but also avoids obstructing the storage area, thus preventing lubricant precipitation and solving the problem of large-area lubricant shedding during large swing angle extrusion. Furthermore, the spaced structural ribs uniformly improve the overall structural strength of the sheath, preventing localized stress concentration.

[0008] In conjunction with the first aspect, in one possible implementation, the surface of the corrugated section is provided with a plurality of receiving grooves, and the surface of the corrugated section and the receiving grooves together form the storage area.

[0009] In the above technical solution, the lubricant, which originally only covered the surface of the bellows, is stored in the receiving groove and on the surface of the bellows. This not only avoids large-area lubricant shedding during the extrusion of the sheath at large swing angles, but also improves the adhesion stability of the lubricant on the sheath surface. The lubricant is divided into sections, ensuring its continuous friction-reducing effect and effectively reducing frictional resistance and the risk of abnormal noise between the peaks and troughs of the bellows. Furthermore, because the lubricant is stored in the receiving groove, it also solves the problem of lubricant easily agglomerating and being washed away by water flow on the surface of traditional smooth sheaths, further ensuring the stability of use under large swing angle conditions and extending the service life of the sheath and universal joint.

[0010] In conjunction with the first aspect, in one possible implementation, a plurality of the receiving grooves are distributed circumferentially along the corrugated joint, and the plurality of receiving grooves located on the same circumferential surface form a receiving module, and a plurality of the receiving modules are radially distributed on the surface of the corrugated joint.

[0011] In the above technical solution, multiple receiving slots are distributed circumferentially along the corrugated joint and form multiple sets of receiving modules radially, resulting in a regular layout of uniform circumferential and layered radially. This allows for even storage of lubricant on the corrugated joint surface, avoiding the problem of increased friction caused by local lubricant deficiency. This distributed layout ensures that lubricant continuously precipitates in each area to reduce friction during sheath oscillation, while dispersing the force of large-angle compression on the lubricant, preventing large-area lubricant detachment and improving adhesion stability. In addition, the multiple sets of receiving modules and structural ribs form a synergistic reinforcement effect, making the sheath surface more uniformly stressed and the stress distribution more reasonable under large-angle conditions. This not only enhances structural strength and impact resistance but also continuously reduces the risk of frictional noise and extends the service life of the sheath.

[0012] In conjunction with the first aspect, in one possible implementation, the surface of the corrugated section is provided with a plurality of spaced protrusions, the protrusions and the surface of the corrugated section forming the storage area.

[0013] In the above technical solution, the lubricant can not only remain in the gap between adjacent protrusions, but also adhere to the protrusions, preventing large-area lubricant loss during the oscillation of the sheath. Simultaneously, it guides the lubricant to precipitate evenly during the oscillation process, continuously providing friction-reducing protection to the crests and troughs, effectively reducing the risk of frictional noise. Furthermore, the protrusions increase the structural strength of the corrugated joint, making the stress distribution more uniform under large oscillation conditions. They can also form point contact with adjacent corrugated joints, further reducing the contact area and lowering the incidence of abnormal noise.

[0014] In conjunction with the first aspect, in one possible implementation, the corrugated section includes a lubrication section and a compression section distributed along the first direction. A crest is formed at the connection between the lubrication section and the compression section, and a trough is formed at the connection between two adjacent sets of corrugated sections. The lubrication section is a planar annular structure perpendicular to the axis of the corrugated section, and the compression section is a conical cylindrical structure with a diameter that gradually decreases along the first direction. The storage area is distributed in the lubrication section, and the structural ribs are distributed in the compression section.

[0015] In the above technical solution, the extrusion section of the corrugated section is a conical cylindrical structure with a diameter that gradually decreases along the first direction, and the lubrication section is a planar annular structure perpendicular to the axis of the corrugated section, which can optimize the stress state during sheath extrusion deformation. When the sheath undergoes extrusion deformation under large swing angle conditions, the conical cylindrical extrusion section can guide the force to be dispersed axially through its own conical surface, while the planar annular lubrication section can provide stable support. The combination of the two ensures that the stress during sheath extrusion is no longer concentrated on a single contact surface, but is evenly transmitted along the junction of the conical surface and the planar surface, effectively reducing the local stress peak. At the same time, the storage area and structural ribs are respectively distributed in the lubrication section and the extrusion section, which not only ensures the stable storage of lubricant and the friction reduction effect, but also further strengthens the local strength through the structural ribs of the extrusion section, improves the structural stability of the sheath under large swing angle extrusion conditions, reduces the risk of breakage, and extends the service life.

[0016] In conjunction with the first aspect, in one possible implementation, a fixing groove is provided on the outer peripheral surface of the first connector in the circumferential direction, the fixing groove being used to accommodate the clamp.

[0017] In the above technical solution, a fixing groove is provided circumferentially on the outer peripheral surface of the first connector to provide installation and positioning space for the clamp, ensuring that the clamp is tightly fitted into the fixing groove and is not easily displaced, thereby improving the connection stability and sealing performance between the first connector and the drive shaft. This embodiment can avoid the problem of uneven locking force caused by clamp misalignment, ensuring the sealing and protection effect of the sheath on the universal joint, effectively preventing lubricating oil leakage and foreign object intrusion, while enhancing the vibration resistance of the connector and ensuring the continuous and reliable operation of the sheath during vehicle operation.

[0018] In conjunction with the first aspect, in one possible implementation, the free end of the first connector is further fitted with a limiting ring, the end face of which is flush with the end face of the first connector, for use in inserting and cooperating with the drive shaft to achieve a seal.

[0019] In the above technical solution, the limiting ring fitted onto the free end of the first connector has an end face flush with the end face of the first connector, allowing it to precisely fit into the corresponding groove on the drive shaft. This not only blocks the intrusion of foreign objects through the engagement of the limiting ring and the groove, but also enhances the sealing effect of the lubricating oil, preventing leakage. Simultaneously, the limiting ring also positions and limits the connection between the first connector and the drive shaft. It can work in conjunction with the clamp in the fixing groove to further improve connection stability, preventing loosening due to vibration during vehicle operation, ensuring the long-term reliability of the sheath's sealing and protective function, and guaranteeing the stable operation of the universal joint and transmission system.

[0020] Secondly, embodiments of this application also provide a transmission system, including the sheath described above.

[0021] The beneficial effects of the transmission system provided in this application are as follows: Compared with the prior art, the aforementioned protective sleeve is used. One side of the corrugated section of the protective body is provided with structural ribs, and the other side forms an uneven storage area. The structural ribs optimize the contact method between adjacent corrugated sections from surface contact to line contact, effectively reducing the contact area and lowering the extrusion friction resistance between corrugated sections under large swing angle conditions, thus suppressing abnormal noise at its source. The storage area can separate and store a large area of ​​lubricant, preventing large-area lubricant detachment due to extrusion under large swing angle conditions. It also improves the problem of poor lubricant adhesion on the surface of traditional protective sleeves, fully utilizing the friction-reducing effect of the lubricant and reducing frictional noise. Furthermore, the structural ribs of the corrugated section and the uneven storage area form a reinforced structure, significantly improving the structural strength of the protective sleeve itself compared to the original smooth structure. Under the same bending angle, the stress value of the protective sleeve is significantly lower than that of the prior art. Simultaneously, this solution also provides impact protection, enhancing the protective sleeve's resistance to impacts and collisions in harsh chassis environments, preventing protective sleeve failure and extending its service life. This application not only solves the core problems of frequent abnormal noise and easy lubricant loss under large swing angle conditions of existing sheaths, but also improves the structural stability and resistance to harsh environments of the sheath, ensuring its long-term reliable sealing and protection function for the universal joint, thereby ensuring the stable operation of the transmission system and the vehicle.

[0022] Thirdly, embodiments of this application also provide a vehicle including the aforementioned transmission system.

[0023] The beneficial effects of the vehicle provided in this application are as follows: Compared with the prior art, the aforementioned transmission system, with structural ribs on one side of the corrugated section of the protective body and an uneven storage area on the other side, optimizes the contact between adjacent corrugated sections from surface contact to line contact, effectively reducing the contact area and lowering the extrusion friction resistance between corrugated sections under large sway angle conditions, thus suppressing abnormal noise at its source. The storage area can separate and store a large area of ​​lubricant, preventing large-area lubricant detachment due to extrusion under large sway angle conditions, while also improving the problem of poor lubricant adhesion on the surface of traditional protective covers, fully utilizing the friction-reducing effect of the lubricant and reducing frictional noise. In addition, the structural ribs of the corrugated section and the uneven storage area can form a reinforced structure, significantly improving the structural strength of the protective cover itself compared to the original smooth structure. Under the same bending angle, the stress value of the protective cover is significantly lower than that of the prior art. At the same time, this solution can also play a role in shock protection, enhancing the protective cover's resistance to bumps and impacts in harsh chassis environments, preventing protective cover failure and extending its service life. This application not only solves the core problems of frequent abnormal noise and easy lubricant loss under large swing angle conditions of existing sheaths, but also improves the structural stability and resistance to harsh environments of the sheath, ensuring its long-term reliable sealing and protection function for the universal joint, thereby ensuring the stable operation of the transmission system and the vehicle. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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 based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the sheath provided in the embodiments of this application; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 for Figure 1 A sectional view along line AA. Figure 4 for Figure 3 Enlarged view of part B in the middle; Figure 5 for Figure 3 A magnified view of part C in the middle.

[0026] In the figure: 1. First connecting body; 101. Fixing groove; 102. Limiting ring; 2. Protective body; 201. Corrugated joint; 2011. Storage area; 2012. Structural rib; 2013. Lubrication part; 2014. Extrusion part; 2015. Receiving groove; 3. Second connecting body. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0028] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a few" means two or more, unless otherwise explicitly specified.

[0030] It should be noted that the directions or positional relationships indicated by "front", "rear", "inner", "outer", "up", and "down" in this embodiment are based on the vehicle's own orientation. The front of the vehicle represents "front", the rear of the vehicle represents "rear", the top of the vehicle represents "up", the bottom of the vehicle represents "down", the "inner" side refers to the side facing the driver's cab, and the "outer" side refers to the side facing the driver's cab.

[0031] In addition, the front-rear direction of the vehicle body as defined in the embodiments of this application refers to the front-rear direction of the vehicle's forward direction during driving; the left-right direction of the vehicle body as defined refers to the left-right direction of the vehicle's forward direction during driving; and the up-down direction of the vehicle body as defined refers to the up-down direction of the vehicle's forward direction during driving.

[0032] Please refer to the following: Figures 1 to 5 The protective sleeve, transmission system, and vehicle provided in this application will now be described. The protective sleeve includes a first connector 1, a protective body 2, and a second connector 3 arranged sequentially along a first direction. The first connector 1 is used to connect with the drive shaft, and the second connector 3 is used to connect with the housing. The protective body 2 includes a plurality of corrugated sections 201 arranged sequentially along the first direction. One side of each corrugated section 201 has a structural rib 2012, and the other side forms an uneven storage area 2011 for storing lubricant.

[0033] Compared with the prior art, the protective sleeve provided in this application has a structural rib 2012 on one side of the corrugated joint 201 of the protective body 2, and an uneven storage area 2011 on the other side. The structural rib 2012 optimizes the contact mode of adjacent corrugated joints 201 from surface contact to line contact, effectively reducing the contact area and reducing the extrusion friction resistance between corrugated joints 201 under large swing angle conditions, thus suppressing abnormal noise at the source. The storage area 2011 can store a large area of ​​lubricant separately, avoiding large-area lubricant shedding due to extrusion under large swing angle conditions. At the same time, it improves the problem of poor lubricant adhesion on the surface of traditional protective sleeves, giving full play to the friction-reducing effect of the lubricant and reducing friction noise. In addition, the structural rib 2012 of the corrugated joint 201 and the uneven storage area 2011 can also form a reinforced structure, which significantly improves the structural strength of the protective sleeve itself compared with the original smooth structure. Under the same bending angle, the stress value of the protective sleeve is significantly reduced compared with the prior art. This solution also provides shock protection, enhancing the sheath's resistance to impacts and collisions in harsh chassis environments, preventing sheath failure and extending its service life. This application not only solves the core problems of frequent abnormal noises and lubricant leakage under large swing angle conditions in existing sheaths, but also improves the structural stability and resistance to harsh environments of the sheath, ensuring its long-term reliable sealing and protection function for the universal joint, thereby guaranteeing the stable operation of the transmission system and the vehicle.

[0034] Optionally, the structural reinforcement 2012 can be one or more of the following: hemispherical, strip, arc, and ring structure.

[0035] Optionally, the surface of the corrugated section 201 can be roughened, for example by sandblasting, to form an uneven storage area 2011 on the surface of the corrugated section 201. Alternatively, an uneven molding surface can be formed on the surface of the mold used to prepare the sheath by sandblasting or other processes, thereby forming an uneven storage area 2011 on the corresponding surface of the sheath.

[0036] Optionally, the surface roughness of storage area 2011 needs to be controlled between Ra1.0 and 1.8.

[0037] Optionally, the corrugated joint 201 connected to the first connector 1 has a smooth surface and does not have structural ribs 2012 or storage area 2011. Since this section of the corrugated joint 201 is not subjected to compressive force during the cornering process of the universal joint, no additional friction-reducing and reinforcing structures are required. This simplifies the production process, reduces manufacturing costs, and avoids the impact of redundant structures on the bending flexibility of the sheath, ensuring smooth cornering of the universal joint.

[0038] Please see Figure 1 In some embodiments, the surface of the corrugated joint 201 has a plurality of structural ribs 2012, and the plurality of structural ribs 2012 are distributed at intervals along the circumferential direction of the corrugated joint 201.

[0039] In this embodiment, the multiple structural ribs 2012 distributed circumferentially optimize the contact method into multiple line or point contacts. This ensures even distribution of contact pressure, avoids aggravated local wear, and provides sufficient deformation space for sheath bending, ensuring flexible rotation under large swing angle conditions. Simultaneously, it reduces extrusion friction intensity to suppress abnormal noise. Compared to the annular structural rib 2012 scheme, this not only avoids the problem of stress concentration and hindered sheath bending deformation caused by circumferential contact between adjacent corrugated sections 201, but also avoids the problem of obstructing the storage area 2011, thus affecting lubricant precipitation, and solves the problem of large-area lubricant shedding during swing angle extrusion. Furthermore, the spaced structural ribs 2012 can uniformly improve the overall structural strength of the sheath, avoiding local stress concentration.

[0040] Specifically, the structural reinforcement 2012 is a straight strip-shaped protrusion or an arc-shaped protrusion.

[0041] Optionally, the side of the structural rib 2012 facing away from the surface of the corrugated joint 201 is an arc-shaped surface, which can further reduce the contact area between adjacent corrugated joints 201, reduce the frictional resistance between corrugated joints 201, and avoid local wear caused by sharp end contact, thus helping to reduce abnormal noise and extend the service life of the sheath.

[0042] Please see Figure 2 In some embodiments, the surface of the corrugated section 201 is provided with a plurality of receiving grooves 2015, and the surface of the corrugated section 201 and the receiving grooves 2015 together form a storage area 2011.

[0043] The receiving groove 2015 in this embodiment further stores the lubricant that originally only covered the surface of the bellows 201. This not only prevents large-area lubricant loss during the angular compression of the sheath, but also improves the adhesion stability of the lubricant on the sheath surface. By dividing the overall attached lubricant, it ensures that it continues to play a friction-reducing role, effectively reducing the frictional resistance and abnormal noise risk between the peaks and troughs. In addition, since the lubricant is stored in the receiving groove 2015, it also solves the problem of lubricant easily agglomerating and being washed away by water flow on the surface of traditional smooth sheaths, further ensuring the stability of use under large angular conditions and extending the service life of the sheath and universal joint.

[0044] Optionally, the receiving groove 2015 is a hemispherical groove. The arc-shaped inner wall not only forms a stable lubricant storage space, but also prevents the lubricant from agglomerating or falling off over a large area due to the obstruction of the groove's sharp edges during oscillation, significantly improving the lubricant's adhesion stability. The hemispherical structure has no sharp edges, which reduces the shearing effect on the lubricant. At the same time, it can guide the lubricant to be evenly released during the sheath's oscillation, continuously providing friction-reducing protection for the crests and troughs, effectively reducing the risk of frictional noise.

[0045] Please see Figure 1 and Figure 2 In some embodiments, multiple receiving slots 2015 are distributed circumferentially along the corrugated section 201, and multiple receiving slots 2015 located on the same circumferential surface form receiving modules, and multiple sets of receiving modules are distributed radially on the surface of the corrugated section 201.

[0046] Multiple receiving slots 2015 are distributed circumferentially along the corrugated joint 201 and form multiple sets of receiving modules radially, resulting in a circumferentially uniform and radially layered regular layout of the storage area 2011. This allows for even storage of lubricant on the surface of the corrugated joint 201, avoiding the problem of increased friction caused by local lubricant shortage. This distributed layout ensures that lubricant is continuously released into each area to reduce friction during sheath oscillation, while also dispersing the force of oscillation angle compression on the lubricant, preventing large-area lubricant detachment and improving adhesion stability. In addition, the multiple sets of receiving modules and the structural ribs 2012 form a synergistic reinforcement effect, making the stress on the sheath surface more uniform and the stress distribution more reasonable under large oscillation angle conditions. This not only enhances structural strength and impact resistance but also continuously reduces the risk of frictional noise and extends the service life of the sheath.

[0047] In some embodiments, the surface of the corrugated section 201 is provided with a plurality of spaced protrusions, and the protrusions and the surface of the corrugated section 201 form a storage area 2011.

[0048] The lubricant can not only remain stably in the gaps between adjacent protrusions, but also adhere to the protrusions, preventing large-scale lubricant loss during sheath oscillation. Simultaneously, it guides the lubricant to evenly disperse during oscillation, continuously providing friction-reducing protection to the crests and troughs, effectively reducing the risk of frictional noise. Furthermore, the protrusions increase the structural strength of the bellows 201, resulting in a more uniform stress distribution under large oscillation conditions. They also form point contacts with adjacent bellows 201, further reducing the contact area and lowering the incidence of abnormal noise.

[0049] Optionally, the protrusion can be a hemispherical structure.

[0050] Please see Figure 3 In some embodiments, the corrugated section 201 includes a lubrication section 2013 and a compression section 2014 distributed along a first direction. A crest is formed at the connection between the lubrication section 2013 and the compression section 2014, and a trough is formed at the connection between two adjacent sets of corrugated sections 201. The lubrication section 2013 is a planar annular structure perpendicular to the axis of the corrugated section 201, and the compression section 2014 is a conical cylindrical structure with a diameter that gradually decreases along the first direction. A storage area 2011 is distributed in the lubrication section 2013, and a structural rib 2012 is distributed in the compression section 2014.

[0051] The extrusion section 2014 of the bellows 201 is a conical cylindrical structure with a diameter that gradually decreases along the first direction, while the lubrication section 2013 is a planar annular structure perpendicular to the axis of the bellows 201. This design optimizes the stress state during sheath extrusion deformation. When the sheath undergoes extrusion deformation under large swing angle conditions, the conical cylindrical extrusion section 2014 can guide the force to be dispersed axially through its own conical surface, while the planar annular lubrication section 2013 provides stable support. The combination of these two components ensures that the stress during sheath extrusion is no longer concentrated on a single contact surface, but is evenly transmitted along the junction of the conical surface and the planar surface, effectively reducing local stress peaks. Simultaneously, the storage area 2011 and structural ribs 2012 are respectively distributed in the lubrication section 2013 and the extrusion section 2014. This ensures stable lubricant storage and friction reduction, while the structural ribs 2012 of the extrusion section 2014 further strengthen the local strength, improving the structural stability of the sheath under large swing angle extrusion conditions, reducing the risk of breakage, and extending its service life.

[0052] Please see Figure 1 In some embodiments, a fixing groove 101 is provided on the outer peripheral surface of the first connecting body 1 in the circumferential direction, and the fixing groove 101 is used to accommodate the clamp.

[0053] A fixing groove 101 is provided circumferentially on the outer peripheral surface of the first connector 1, providing installation and positioning space for the clamp. This ensures the clamp is tightly fitted into the fixing groove 101 and is not easily displaced, improving the connection stability and sealing between the first connector 1 and the drive shaft. This embodiment avoids uneven locking force caused by clamp misalignment, ensuring the sealing and protection effect of the sheath on the universal joint, effectively preventing lubricant leakage and foreign object intrusion, while enhancing the vibration resistance of the connection part and ensuring the continuous and reliable operation of the sheath during vehicle operation.

[0054] Please see Figure 3 and Figure 5 In some embodiments, a limiting ring 102 is also fitted on the free end of the first connector 1. The end face of the limiting ring 102 is flush with the end face of the first connector 1 and is used to insert and cooperate with the drive shaft to achieve sealing.

[0055] The limiting ring 102, fitted onto the free end of the first connector 1, has its end face flush with the end face of the first connector 1. It precisely fits into the corresponding groove on the drive shaft, both blocking the intrusion of foreign objects through the engagement of the limiting ring 102 with the groove and enhancing the sealing effect of the lubricating oil to prevent leakage. Simultaneously, the limiting ring 102 also positions and limits the connection between the first connector 1 and the drive shaft. It can work in conjunction with the clamp in the fixing groove 101 to further improve connection stability, preventing loosening due to vibration during vehicle operation, ensuring the long-term reliability of the sheath's sealing and protective function, and guaranteeing the stable operation of the universal joint and transmission system.

[0056] Based on the same inventive concept, embodiments of this application also provide a transmission system. The transmission system includes the aforementioned sheath.

[0057] The transmission system provided by this utility model adopts the aforementioned protective sleeve. One side of the corrugated section 201 of the protective body 2 is provided with structural ribs 2012, and the other side forms an uneven storage area 2011. The structural ribs 2012 optimize the contact method between adjacent corrugated sections 201 from surface contact to line contact, effectively reducing the contact area and lowering the extrusion friction resistance between the corrugated sections 201 under large swing angle conditions, thus suppressing abnormal noise at its source. The storage area 2011 can separate and store a large area of ​​lubricant, preventing large-area lubricant detachment due to extrusion under large swing angle conditions. It also improves the problem of poor lubricant adhesion on the surface of traditional protective sleeves, fully utilizing the friction-reducing effect of the lubricant and reducing frictional noise. Furthermore, the structural ribs 2012 of the corrugated section 201 and the uneven storage area 2011 form a reinforced structure, significantly improving the structural strength of the protective sleeve itself compared to the original smooth structure. Under the same bending angle, the stress value of the protective sleeve is significantly lower than that of the prior art. This solution also provides shock protection, enhancing the sheath's resistance to impacts and collisions in harsh chassis environments, preventing sheath failure and extending its service life. This application not only solves the core problems of frequent abnormal noises and lubricant leakage under large swing angle conditions in existing sheaths, but also improves the structural stability and resistance to harsh environments of the sheath, ensuring its long-term reliable sealing and protection function for the universal joint, thereby guaranteeing the stable operation of the transmission system and the vehicle.

[0058] Based on the same inventive concept, this application also provides a vehicle. The vehicle includes the aforementioned transmission system.

[0059] The vehicle provided by this utility model adopts the aforementioned transmission system. One side of the corrugated section 201 of the protective body 2 is provided with structural ribs 2012, and the other side forms an uneven storage area 2011. The structural ribs 2012 optimize the contact method between adjacent corrugated sections 201 from surface contact to line contact, effectively reducing the contact area and lowering the extrusion friction resistance between the corrugated sections 201 under large sway angle conditions, thus suppressing abnormal noise at its source. The storage area 2011 can separate and store a large area of ​​lubricant, preventing large-area lubricant detachment due to extrusion under large sway angle conditions. It also improves the problem of poor lubricant adhesion on the surface of traditional protective covers, fully utilizing the friction-reducing effect of the lubricant and reducing frictional noise. Furthermore, the structural ribs 2012 of the corrugated section 201 and the uneven storage area 2011 form a reinforced structure, significantly improving the structural strength of the protective cover itself compared to the original smooth structure. Under the same bending angle, the stress value of the protective cover is significantly lower than that of the prior art. This solution also provides shock protection, enhancing the sheath's resistance to impacts and collisions in harsh chassis environments, preventing sheath failure and extending its service life. This application not only solves the core problems of frequent abnormal noises and lubricant leakage under large swing angle conditions in existing sheaths, but also improves the structural stability and resistance to harsh environments of the sheath, ensuring its long-term reliable sealing and protection function for the universal joint, thereby guaranteeing the stable operation of the transmission system and the vehicle.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sheath, characterized in that, The device includes a first connector (1), a protective body (2), and a second connector (3) arranged sequentially along a first direction. The first connector (1) is used to connect with a drive shaft, and the second connector (3) is used to connect with a housing. The protective body (2) includes a plurality of corrugated sections (201) arranged sequentially along the first direction. One side of each corrugated section (201) has a structural rib (2012), and the other side forms an uneven storage area (2011) for storing lubricant.

2. The sheath as described in claim 1, characterized in that, The surface of the corrugated joint (201) has a plurality of structural ribs (2012), and the plurality of structural ribs (2012) are distributed at intervals along the circumference of the corrugated joint (201).

3. The sheath as described in claim 1, characterized in that, The surface of the corrugated section (201) is provided with a plurality of receiving grooves (2015), and the surface of the corrugated section (201) and the receiving grooves (2015) together form the storage area (2011).

4. The sheath as described in claim 3, characterized in that, Multiple receiving slots (2015) are distributed circumferentially along the corrugated section (201), and multiple receiving slots (2015) located on the same circumferential surface form receiving modules. Multiple sets of receiving modules are radially distributed on the surface of the corrugated section (201).

5. The sheath as described in claim 1, characterized in that, The surface of the corrugated section (201) is provided with a plurality of spaced protrusions, which together with the surface of the corrugated section (201) form the storage area (2011).

6. The sheath as described in claim 1, characterized in that, The corrugated section (201) includes a lubrication section (2013) and a compression section (2014) distributed along the first direction. A crest is formed at the connection between the lubrication section (2013) and the compression section (2014), and a trough is formed at the connection between two adjacent sets of corrugated sections (201). The lubrication section (2013) is a planar annular structure perpendicular to the axis of the corrugated section (201). The compression section (2014) is a conical cylindrical structure with a diameter that gradually decreases along the first direction. The storage area (2011) is distributed in the lubrication section (2013), and the structural rib (2012) is distributed in the compression section (2014).

7. The sheath as described in claim 1, characterized in that, The outer peripheral surface of the first connector (1) is provided with a fixing groove (101) along the circumferential direction, and the fixing groove (101) is used to accommodate the clamp.

8. The sheath as described in claim 1, characterized in that, The free end of the first connector (1) is also fitted with a limiting ring (102), the end face of which is flush with the end face of the first connector (1) and is used to insert and cooperate with the drive shaft to achieve sealing.

9. A transmission system, characterized in that, It has a sheath as described in any one of claims 1-8.

10. A vehicle, characterized in that, It has the transmission system as described in claim 9.

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