Driveshaft assembly and vehicle

Abstract

This application relates to the field of vehicle chassis technology and provides a driveshaft assembly. The driveshaft assembly of this application includes a driveshaft and a universal joint. The driveshaft includes a driveshaft body and a connecting portion. An insertion hole in the connecting portion communicates with a cavity in the driveshaft body. A connector shaft is provided on the mounting body of the universal joint. The connector shaft can be inserted into the insertion hole, and an anti-rotation structure is provided between the connector shaft and the connecting portion to prevent relative rotation between the mounting body and the driveshaft. This driveshaft assembly, by providing an insertion hole communicating with the cavity in the connecting portion and inserting the connector shaft into the insertion hole, meets the requirements of lightweight design. When applied to vehicles, it can improve fuel consumption, increase the critical speed of the driveshaft, and reduce the risk of driveshaft resonance. Furthermore, because the connector shaft is inserted into the insertion hole, and the insertion hole communicates with the cavity, a longer insertion space can be provided for the connector shaft in the axial direction of the insertion hole, which can increase the axial extension and retraction stroke of the universal joint and the driveshaft.

Description

Technical Field

[0001] This application relates to the field of vehicle chassis technology, and in particular to a driveshaft assembly. This application also relates to a vehicle using this driveshaft assembly. Background Technology

[0002] The driveshaft is an important component of the automotive transmission system. Its main function is to transmit the torque and motion from the transfer case to the final drive, and then, through the final drive and drive shaft, transmit the torque and motion to the wheels to drive the wheels.

[0003] Existing driveshafts typically connect to universal joints at their ends to enable variable-angle power transmission. However, in existing driveshaft-universal joint connection structures, the universal joint mounting body has a sleeve into which one end of the driveshaft is inserted, connecting the driveshaft and universal joint. This connection structure results in a limited axial sliding stroke between the universal joint and the driveshaft, restricting the driveshaft's applicability. Utility Model Content

[0004] In view of this, this application aims to provide a drive shaft assembly to improve the applicability of drive shafts.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A drive shaft assembly includes a drive shaft and a universal joint connected to at least one end of the drive shaft;

[0007] The drive shaft includes a drive shaft body with a cavity, and a connecting part provided at the end of the drive shaft, wherein the connecting part is provided with an insertion hole communicating with the cavity;

[0008] The universal joint mounting body is provided with a plug shaft that can be inserted into the insertion hole, and an anti-rotation structure is provided between the plug shaft and the connecting part to prevent the mounting body from rotating relative to the drive shaft.

[0009] Furthermore, the insertion shaft has a cavity that extends along the axial direction of the insertion shaft and is connected to the cavity inside the transmission shaft body.

[0010] Furthermore, the insertion shaft and the mounting body are integrally formed, the space inside the mounting body is connected to the cavity, and a plug is placed at the connection point.

[0011] Furthermore, a sealing gasket is provided between the plug and the mounting body to seal the gap between them.

[0012] Furthermore, the connecting part includes a first sleeve and a second sleeve that are connected to each other. The connecting part is connected to the drive shaft body through the first sleeve, and the through hole in the second sleeve constitutes the insertion hole.

[0013] The outer diameter of the first sleeve is the same as the outer diameter of the drive shaft body, and the outer diameter of the second sleeve is smaller than the outer diameter of the first sleeve.

[0014] Furthermore, it also includes a protective sleeve, one end of which is fastened to the mounting body by a first clamp, and the other end is fastened to the second sleeve by a second clamp.

[0015] Furthermore, the side wall of the cavity near the mounting body is provided with a vent hole, and the space formed by the protective sleeve, the insertion shaft and the second sleeve communicates with the cavity through the vent hole.

[0016] Furthermore, the plug shaft is provided with an anti-detachment part, which can prevent the universal joint from detaching from the drive shaft along the axial direction of the drive shaft.

[0017] Furthermore, the anti-detachment part includes a mounting groove provided on the plug shaft, and a retaining ring fitted into the mounting groove.

[0018] Compared with related technologies, this application has the following advantages:

[0019] (1) By setting an insertion hole in the connection part that communicates with the cavity and inserting the insertion shaft into the insertion hole, it meets the requirements of lightweight design. When applied to vehicles, it can improve fuel consumption, increase the critical speed of the drive shaft, and reduce the risk of drive shaft resonance. Since the insertion shaft is inserted into the insertion hole and the insertion hole communicates with the cavity, the cavity in the drive shaft body can provide a longer insertion space for the insertion shaft in the axial direction of the insertion hole, which can increase the axial extension and retraction stroke of the universal joint and the drive shaft, thereby increasing the applicability of the drive shaft.

[0020] (2) Setting an axially extending cavity inside the plug shaft can effectively reduce the weight of the plug shaft and meet the requirements of vehicle lightweighting. In addition, since the cavity can reduce the amount of material required for the plug shaft, the amount of raw materials used in the production process is reduced accordingly, which helps to reduce costs. At the same time, the presence of the cavity can also improve the bending stiffness and torsional stiffness of the plug shaft.

[0021] (3) The plug shaft and the mounting body are integrally formed, which is convenient to process; the space inside the mounting body is connected to the cavity, which makes it easy to use die casting process to form the plug shaft and the mounting body as an integral part, which can reduce the manufacturing difficulty of the mold and help reduce processing and design costs; the connection between the space inside the mounting body and the cavity is blocked and covered, which can effectively prevent foreign objects such as mud, sand, and water from entering the inside of the drive shaft, which can better protect the drive shaft and extend the service life of the drive shaft.

[0022] (4) A sealing gasket is installed between the plug and the mounting body to improve the sealing performance of the connection between the plug and the inner cavity of the mounting body, thereby further preventing foreign objects such as mud, sand, and water from entering the drive shaft.

[0023] (5) The connecting part includes a first sleeve and a second sleeve, which are simple to process and have low weight. The outer diameter of the first sleeve is the same as the outer diameter of the drive shaft body, which allows the drive shaft body to use existing shaft tubes, resulting in lower cost. The connecting part and the first sleeve can be directly welded together, making processing more convenient. The outer diameter of the second sleeve is smaller than the outer diameter of the first sleeve, which facilitates insertion and connection with the plug-in shaft.

[0024] (6) By setting up a protective sleeve, foreign objects such as mud, sand, and water can be effectively prevented from entering the drive shaft through the insertion part of the plug shaft and the connecting part, which can further improve the service life of the drive shaft. One end of the protective sleeve is fastened to the mounting body by the first clamp, and the other end is fastened to the second sleeve by the second clamp. The first clamp and the second clamp set here help to improve the stability and reliability of the protective sleeve.

[0025] (7) A vent hole is provided on the side wall of the cavity near the mounting body, and the space formed by the protective sleeve, the plug shaft and the second sleeve is connected to the cavity through the vent hole. During the operation of the drive shaft assembly, the gas in the space formed by the protective sleeve, the plug shaft and the second sleeve expands due to heat and can enter the cavity of the drive shaft body through the vent hole and the cavity, which can prevent the protective sleeve from bearing a large pressure and help extend the service life of the protective sleeve.

[0026] (8) An anti-disengagement part is provided on the plug shaft to prevent the universal joint from disengaging from the drive shaft along the axial direction of the drive shaft, which helps to ensure the safe and reliable operation of the drive shaft. When applied to vehicles, it can improve the safety of vehicle driving.

[0027] (9) The anti-detachment part includes a mounting groove on the plug shaft and a retaining spring embedded in the mounting groove. The mounting groove is easy to process, and the retaining spring can use existing standard parts, which helps to reduce production costs. During the insertion of the plug shaft into the insertion hole, the retaining spring can be embedded into the mounting groove first, and when the insertion depth of the plug shaft reaches the preset threshold, the retaining spring resets, which can prevent the plug shaft from coming out of the insertion hole, making assembly more convenient.

[0028] Another object of this application is to provide a vehicle having a driveshaft assembly as described above.

[0029] The vehicle described in this application, by applying the driveshaft assembly as described above, can reduce the vehicle's total weight, improve fuel consumption, and reduce the risk of driveshaft resonance. Because the universal joint and driveshaft axial extension and retraction travel in the driveshaft assembly are relatively long, the longer extension and retraction travel can better adapt to complex road condition changes during vehicle operation, reduce stress concentration caused by excessive extension or compression of the driveshaft, reduce the risk of driveshaft damage, improve vehicle driving stability and reliability, and thus improve vehicle safety performance. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is an exemplary cross-sectional view of the drive shaft assembly described in an embodiment of this application;

[0032] Figure 2 This is an exemplary cross-sectional view of the universal joint described in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Drive shaft;

[0035] 101. Drive shaft body; 102. Connecting part;

[0036] 101A, cavity;

[0037] 1021, First sleeve; 1022, Second sleeve; 10221, Insertion hole;

[0038] 2. Universal joint;

[0039] 201. Mounting body; 202. Connecting shaft; 203. Cross shaft;

[0040] 2021, cavity; 2022, vent;

[0041] 3. Plug; 4. Sealing gasket; 5. Protective sleeve; 6. First clamp; 7. Second clamp; 8. Fastener;

[0042] 9. Anti-hair loss section;

[0043] 901. Mounting slot; 902. Snap ring. Detailed Implementation

[0044] To make the technical solution and advantages of 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 not intended to limit the scope of this application.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0046] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not 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 on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0048] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is 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. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0050] An embodiment of the first aspect of this application provides a drive shaft assembly that is lightweight, easy to install, and widely applicable.

[0051] In related technologies, the driveshaft is an important component of the automotive transmission system. Its main function is to transmit the torque and motion from the transfer case to the final drive, and then, through the final drive and drive shaft, transmit the torque and motion to the wheels to drive the wheels.

[0052] Existing drive shafts typically have their ends connected to universal joints to enable variable-angle power transmission. For example, one existing drive shaft and universal joint connection structure uses a cross-type universal joint with a sleeve connected to the universal joint fork. One end of the drive shaft has a connecting shaft, which is typically solid and inserted into the sleeve on the universal joint fork, thus achieving variable-angle power transmission.

[0053] However, the existing connection structure between the drive shaft and the universal joint involves setting a sleeve on the mounting body of the universal joint and inserting one end of the drive shaft into the sleeve. This connection structure results in a small axial sliding stroke between the universal joint and the drive shaft, which limits the applicability of the drive shaft.

[0054] In view of this, in order to overcome the shortcomings of the related technology, the drive shaft assembly of this embodiment combines... Figure 1 As shown, the overall design includes a drive shaft 1 and a universal joint 2 connected to at least one end of the drive shaft 1.

[0055] Based on the above general description, specifically, the drive shaft 1 includes a drive shaft body 101 with a cavity 101A, and a connecting portion 102 located at the end of the drive shaft 1. The connecting portion 102 has an insertion hole 10221 communicating with the cavity 101A. The mounting body 201 of the universal joint 2 is provided with a plug-in shaft 202, which can be inserted into the insertion hole 10221. An anti-rotation structure is provided between the plug-in shaft 202 and the connecting portion 102 to prevent the mounting body 201 from rotating relative to the drive shaft 1.

[0056] To better understand this driveshaft assembly, the structure of driveshaft 1 will be briefly described first. Driveshaft 1 mainly includes a driveshaft body 101 and a connecting part 102 connected to one end of the driveshaft body 101.

[0057] The drive shaft body 101 uses an existing shaft tube, and the connecting part 102 is welded to one end of the shaft tube. A universal joint 2 is installed at the other end of the drive shaft 1. The connection structure between the universal joint 2 and the drive shaft body 1 refers to relevant technologies and will not be described in detail here.

[0058] Next, the structure of universal joint 2 will be briefly described. In the following description, universal joint 2 will be used as the existing cross-type universal joint.

[0059] Specifically, refer to Figure 1 and Figure 2 As shown, the cross-shaped universal joint includes two universal joint forks and a cross shaft 203 connecting the two universal joint forks. The universal joint fork near the drive shaft 1 is the mounting body 201 of the universal joint 2 described in this application.

[0060] The drive shaft assembly of this application, by providing an insertion hole 10221 communicating with the cavity 101A in the connecting part 102 and inserting the insertion shaft 202 into the insertion hole 10221, meets the requirements of lightweight design. When applied to a vehicle, it can improve fuel consumption, increase the critical speed of the drive shaft 1, and reduce the risk of resonance of the drive shaft 1.

[0061] Since the insertion shaft 202 is inserted into the insertion hole 10221, and the insertion hole 10221 is connected to the cavity 101A, the cavity 101A in the drive shaft body 101 can provide a longer insertion space for the insertion shaft 202 in the axial direction of the insertion hole 10221, which can increase the axial extension and retraction stroke of the universal joint 2 and the drive shaft 1, thereby increasing the applicability of the drive shaft 1.

[0062] It should be noted that, in the preferred embodiment, the aforementioned anti-rotation part includes an external spline on the outer wall of the insertion shaft 202 and an internal spline on the inner wall of the insertion hole, so that the insertion shaft 202 and the connecting part 102 are splinedly connected by the internal and external splines. In this way, a large torque can be transmitted between the universal joint 2 and the drive shaft 1, and the universal joint 2 and the drive shaft 1 can slide relative to each other in the axial direction of the drive shaft 1, so that both have a certain sliding stroke in the axial direction of the drive shaft 1.

[0063] Continue to combine Figures 1 to 2 As shown, in some exemplary embodiments, the plug shaft 202 has a cavity 2021 extending axially along the plug shaft 202. In some examples, the cavity 2021 has a circular cross-section, and since the plug shaft 202 also has a circular cross-section, the plug shaft 202 partially forms a tubular structure.

[0064] Here, an axially extending cavity 2021 is provided inside the plug shaft 202, which is equivalent to removing a portion of the material from the solid structure of the plug shaft 202, effectively reducing the weight of the plug shaft 202 and meeting the requirements for vehicle lightweighting.

[0065] In addition, due to the increase of the inner cavity 2021 of the plug shaft 202, the amount of material required for the plug shaft 202 can be reduced. During the production process, the amount of raw materials used in the plug shaft 202 is reduced accordingly, which helps to reduce costs. At the same time, the presence of the cavity 2021 can also improve the bending stiffness and torsional stiffness of the plug shaft 202.

[0066] In some examples, the cavity 2021 is arranged to pass through the insertion shaft 202 along the axial direction of the insertion shaft 202, so that the cavity 2021 is connected to the cavity 101A in the drive shaft body 101. This not only gives the insertion shaft 202 a better weight reduction effect, but also allows the gas entering the cavity 2021 through the vent 2022 to enter the cavity 101A, which has a better effect of relieving gas pressure.

[0067] Still refer to Figure 1 and Figure 2 As shown, for ease of processing, in some exemplary embodiments, the plug shaft 202 and the mounting body 201 are integrally formed, the space inside the mounting body 201 is connected to the cavity 2021, and a plug 3 is placed at the connection point.

[0068] For example Figure 1 and Figure 2 In the structure shown, the mounting body 201 is a universal joint fork, and the plug shaft 202 and the universal joint fork are integrally formed. For example, it can be integrally formed by die casting, which is convenient to process, and a set of molds is used in the processing, so the mold cost is also low.

[0069] In the above structure, the space inside the mounting body 201 is connected to the cavity 2021, which makes it easy to integrally form the plug shaft 202 and the mounting body 201 using the die casting process. This reduces the difficulty of mold manufacturing and helps to reduce processing and design costs.

[0070] The plug 3 installed at the connection between the space inside the mounting body 201 and the cavity 2021 can effectively prevent foreign objects such as mud, sand, and water from entering the drive shaft 1, thus protecting the drive shaft 1 and extending its service life.

[0071] exist Figure 1 In one exemplary structure shown, a snap-fit ​​hole is provided at the connection point between the inner space of the mounting body 201 and the cavity 2021. The plug 3 is pressed into the snap-fit ​​hole, making assembly relatively convenient. The middle part of the plug 3 protrudes outward along the axial direction of the insertion shaft 202 away from the insertion shaft 202, so that the plug 3 can utilize the energy generated by its own elastic deformation to be firmly snapped into the snap-fit ​​hole, which helps to improve the reliability of the plug 3's fixation.

[0072] In addition, the plug 3 can also be fixed to the communication part between the space inside the mounting body 201 and the cavity 2021 in other ways, for example... Figure 2 In one exemplary structure shown, the plug 3 is installed in the communication area between the space inside the mounting body 201 and the cavity 2021 using fasteners 8. In a specific implementation, the plug 3 can be a flat plate structure.

[0073] In actual setup, for example, a stepped surface is provided at the connection between the inner space of the mounting body 201 and the cavity 2021, and a threaded hole is machined on the stepped surface. The plug 3 overlaps on the stepped surface, and the fastener 8 is a bolt that passes through the plug 3 and is tightened at the threaded hole, so that the plug 3 can be sealed at the connection between the inner space of the mounting body 201 and the cavity 2021.

[0074] To improve the fixing effect, there are multiple fasteners 8, which are arranged at intervals around the step surface. The number of fasteners 8 can be, for example, two, three, four, etc., and no specific limitation is made here.

[0075] like Figure 2 As shown, in some exemplary embodiments, a sealing gasket 4 is provided between the plug 3 and the mounting body 201 to seal the gap between them. Specifically, the sealing gasket 4 can be any existing rubber gasket or silicone gasket.

[0076] It should be noted that, in the preferred embodiment, the sealing gasket 4 is annular, and the annular sealing gasket 4 is provided with clearance holes for each fastener 8. In the above structure, the sealing gasket 4 is provided between the plug 3 and the mounting body 201, which can improve the sealing performance of the connection between the plug 3 and the inner cavity 2021 of the mounting body 201, thereby further preventing foreign objects such as mud, sand, and water from entering the interior of the drive shaft 1.

[0077] Still refer to Figure 1 As shown, in some exemplary embodiments, the connecting part 102 includes a first sleeve 1021 and a second sleeve 1022 that are connected to each other. The connecting part 102 is connected to the drive shaft body 101 through the first sleeve 1021, and the through hole in the second sleeve 1022 forms an insertion hole 10221. The outer diameter of the first sleeve 1021 is the same as the outer diameter of the drive shaft body 101, and the outer diameter of the second sleeve 1022 is smaller than the outer diameter of the first sleeve 1021.

[0078] In the exemplary structure described above, the connecting part 102 includes a first sleeve 1021 and a second sleeve 1022, which simplifies processing and reduces weight. The outer diameter of the first sleeve 1021 is the same as the outer diameter of the drive shaft body 101, allowing the drive shaft body 101 to use existing shaft tubes, thus reducing cost. Furthermore, the connecting part 102 and the first sleeve 1021 can be directly welded together, making processing more convenient. The outer diameter of the second sleeve 1022 is smaller than the outer diameter of the first sleeve 1021, facilitating insertion and connection with the insertion shaft 202.

[0079] Continue to refer to Figure 1 and combined Figure 2As shown, in some exemplary embodiments, the drive shaft assembly of this application further includes a protective sleeve 5, one end of which is fastened to the mounting body 201 by a first clamp 6, and the other end is fastened to the second sleeve 1022 by a second clamp 7.

[0080] By setting up a protective sleeve 5, foreign objects such as mud, sand, and water can be effectively prevented from entering the drive shaft 1 through the insertion part of the insertion shaft 202 and the connecting part 102, which can further improve the service life of the drive shaft 1.

[0081] In practice, one end of the protective sleeve 5 is fastened to the mounting body 201 by the first clamp 6, and the other end is fastened to the second sleeve 1022 by the second clamp 7. The first clamp 6 and the second clamp 7 can both be standard parts in the prior art, which helps to improve the stability and reliability of the protective sleeve 5.

[0082] In another exemplary embodiment, one end of the protective sleeve 5 is fastened to the mounting body 201 by a first clamp 6. The other end of the protective sleeve 5 is sealed to the second sleeve 1022 by an oil seal, which may be an existing standard part.

[0083] In practical implementation, a metal ring is fixedly connected to one end of the protective sleeve 5 that connects to the second sleeve 1022. For example, the protective sleeve 5 and the metal ring can be connected together by adhesive bonding or vulcanization. The oil seal is installed inside the metal ring, and the installation method refers to the existing structure, with the lip of the oil seal abutting against the outer peripheral wall of the second sleeve 1022.

[0084] With this configuration, during the relative torsion process between the universal joint 2 and the drive shaft 1, the end of the protective sleeve 5 with the oil seal can rotate circumferentially around the second sleeve 1022, and the torsional force borne by the protective sleeve 5 is relatively small, which is conducive to extending the service life of the protective sleeve 5.

[0085] To prevent the oil-sealed end of the protective sleeve 5 from detaching from the second sleeve 1022, an anti-detachment structure is provided on the outer wall of the second sleeve 1022. Specifically, it includes a groove on the outer wall of the second sleeve 1022 and a retaining ring installed in the groove to prevent the oil-sealed end of the protective sleeve 5 from detaching from the second sleeve 1022 along the axial direction of the second sleeve 1022.

[0086] It should be noted that, apart from this, Figure 1 In the state shown, the right end of the protective sleeve 5 can be fastened to the second sleeve 1022 by the second clamp 7, and the left end of the protective sleeve 5 can be sealed with an oil seal as described above. In order to prevent the protective sleeve 5 from detaching, a groove and a retaining ring can be provided on the outer wall of the mounting body 201.

[0087] In some exemplary embodiments, the side wall of the cavity 2021 near the mounting body 201 is provided with a vent 2022, and the space formed by the protective sleeve 5, the plug shaft 202, and the second sleeve 1022 communicates with the cavity 2021 through the vent 2022.

[0088] In some examples, the axial direction of the vent 2022 is orthogonal to the axial direction of the insertion shaft 202, which provides better ventilation. It should be understood that it is also feasible to arrange the axial direction of the vent 2022 non-orthogonally to the axial direction of the insertion shaft 202.

[0089] In other examples, there are multiple vents 2022, which are arranged circumferentially around the insertion shaft 202. For example... Figure 2 As shown, there are two vent holes 2022, which are symmetrically arranged about the center line of the insertion shaft 202. It should be understood that the number of vent holes 2022 can also be three, four, five, etc., so that in the preferred embodiment, these vent holes 2022 are evenly spaced around the circumference of the insertion shaft 202.

[0090] In the above structure, a vent 2022 is provided on the side wall of the cavity 2021 near the mounting body 201, and the space formed by the protective sleeve 5, the plug shaft 202, and the second sleeve 1022 is connected to the cavity 2021 through the vent 2022. During the operation of the drive shaft assembly, the gas in the space formed by the protective sleeve 5, the plug shaft 202, and the second sleeve 1022 expands due to heat and can enter the cavity 101A of the drive shaft body 101 through the vent 2022 and the cavity 2021, which can prevent the protective sleeve 5 from bearing too much pressure and help extend the service life of the protective sleeve 5.

[0091] To improve the reliability of the driveshaft assembly, such as Figure 2 As shown, in some exemplary embodiments, the plug shaft 202 is provided with an anti-detachment part 9, which can prevent the universal joint 2 from detaching from the drive shaft 1 along the axial direction of the drive shaft 1.

[0092] Depend on Figure 2 Combination Figure 1 As shown, the anti-detachment part 9 provided on the insertion shaft 202 can prevent the universal joint 2 from detaching from the drive shaft 1 along the axial direction of the drive shaft 1, for example... Figure 1 and Figure 2 In the structure shown, the anti-detachment part 9 can prevent the insertion shaft 202 from coming out of the insertion hole, which helps to ensure the safe and reliable operation of the drive shaft 1. When applied to vehicles, it can improve the safety of vehicle driving.

[0093] Continue to refer to Figure 2As shown, in some exemplary embodiments, the anti-detachment part 9 includes a mounting groove 901 provided on the insertion shaft 202, and a retaining ring 902 fitted into the mounting groove 901. The retaining ring 902 can be an existing standard part and can be purchased directly.

[0094] In this exemplary embodiment, the anti-detachment part 9 includes a mounting groove 901 provided on the plug shaft 202 and a retaining spring 902 embedded in the mounting groove 901. The mounting groove 901 is simple to process, and the retaining spring 902 can be an existing standard part, which helps to reduce production costs.

[0095] During the insertion of the connector shaft 202 into the insertion hole 10221, the retaining ring 902 can first be embedded into the mounting groove 901. When the insertion depth of the connector shaft 202 reaches the preset threshold, the retaining ring 902 resets. When the connector shaft 202 moves to the left, the retaining ring 902 can block the end face of one end of the through hole in the first sleeve 1021, which can prevent the connector shaft 202 from coming out of the insertion hole 10221, making assembly more convenient.

[0096] Finally, it should be noted that the universal joint 2 mentioned in this embodiment can be either a cross-type universal joint or a ball cage type universal joint. When the universal joint 2 is a ball cage type universal joint, the aforementioned mounting body 201 is the ball shell of the ball cage type universal joint, that is, the aforementioned plug-in shaft 202 is connected to one end of the ball shell.

[0097] Furthermore, it should be noted that when the driveshaft assembly of this application is arranged on a vehicle, it can be arranged longitudinally on the vehicle, in which case the axial direction of the driveshaft assembly is arranged along the longitudinal direction of the vehicle. In addition, the driveshaft assembly of this application can also be arranged laterally on the vehicle, in which case the axial direction of the driveshaft assembly is arranged along the left-right direction of the vehicle.

[0098] It is worth noting that, regarding the drive shaft assembly of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figure 1 and Figure 2 As shown, the drive shaft assembly includes a drive shaft 1 and a cross-type universal joint or a ball-cage type universal joint connected to one end of the drive shaft 1.

[0099] Specifically, the drive shaft 1 includes a drive shaft body 101 with a cavity 101A and a connecting part 102 at the end of the drive shaft 1. The connecting part 102 has an insertion hole 10221 communicating with the cavity 101A. The mounting body 201 of the universal joint 2 is provided with a plug shaft 202. The plug shaft 202 can be inserted into the insertion hole 10221, and the plug shaft 202 and the connecting part 102 are connected by a spline.

[0100] The plug shaft 202 is tubular and integrally formed with the mounting body 201. The space inside the mounting body 201 is connected to the cavity 2021, and a plug 3 is placed at the connection point. The plug 3 is snapped into the connection point, and a sealing gasket 4 is provided between the plug 3 and the mounting body 201 to seal the gap between them.

[0101] The connecting part 102 includes a first sleeve 1021 and a second sleeve 1022 that are connected to each other. The connecting part 102 is connected to the drive shaft body 101 through the first sleeve 1021. The through hole in the second sleeve 1022 forms an insertion hole 10221. The outer diameter of the first sleeve 1021 is the same as the outer diameter of the drive shaft body 101, and the outer diameter of the second sleeve 1022 is smaller than the outer diameter of the first sleeve 1021.

[0102] The drive shaft assembly of this application also includes a protective sleeve 5, one end of which is fastened to the mounting body 201 by a first clamp 6, and the other end is fastened to the second sleeve 1022 by a second clamp 7.

[0103] The side wall of the cavity 2021 near the mounting body 201 is provided with multiple vent holes 2022. The multiple vent holes 2022 are arranged circumferentially around the plug shaft 202. The space formed by the protective sleeve 5, the plug shaft 202, and the second sleeve 1022 is connected to the cavity 2021 through the multiple vent holes 2022.

[0104] The plug shaft 202 is provided with a mounting groove 901 and a retaining ring 902 embedded in the mounting groove 901. The retaining ring 902 can block the end face of one end of the through hole in the first sleeve 1021 to prevent the plug shaft 202 from coming out of the plug hole along its own axis.

[0105] In the above preferred embodiments, the structures of the connecting portion 102 and the insertion shaft 202 result in a lighter overall weight of the drive shaft assembly. When the insertion shaft 202 is inserted into the insertion hole of the connecting portion 102, the space within the drive shaft body 101 provides movement space for the insertion shaft 202 during the axial sliding of the universal joint 2 and the drive shaft 1. This increases the relative sliding stroke between the universal joint 2 and the drive shaft 1, thereby improving the safety and reliability of the drive shaft assembly application.

[0106] The drive shaft assembly of this embodiment adopts the above-mentioned vent 2022 design, so that the gas in the space enclosed by the protective sleeve 5, the plug shaft 202 and the connecting part 102 can enter the cavity 2021 of the plug shaft 202 through the vent 2022 and can enter the cavity 101A of the drive shaft body 101.

[0107] During the application of the drive shaft assembly, the high temperature generated causes the gas in the space enclosed by the protective sleeve 5, the plug shaft 202 and the connecting part 102 to expand due to heat. The gas will flow out from the vent 2022, which can reduce the pressure applied to the protective sleeve 5 and thus extend the service life of the protective sleeve 5.

[0108] Furthermore, the mounting groove 901 and snap ring 902 provided on the insertion shaft 202 can prevent the insertion shaft 202 from coming out of the insertion hole along its own axis, thereby improving the safety and reliability of the drive shaft assembly application.

[0109] An embodiment of the second aspect of this application provides a vehicle having a driveshaft assembly as described above.

[0110] The vehicle described in this application, by applying the driveshaft assembly as described above, can reduce the vehicle's total weight, improve fuel consumption, and reduce the risk of resonance of the driveshaft 1. Since the universal joint 2 and the axial extension and retraction stroke of the driveshaft 1 in the driveshaft assembly are relatively long, the longer extension and retraction stroke can better adapt to such complex road condition changes during vehicle operation, reduce stress concentration caused by excessive extension or compression of the driveshaft 1, reduce the risk of damage to the driveshaft 1, improve the vehicle's driving stability and reliability, and thus improve the vehicle's safety performance.

[0111] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A drive shaft assembly, characterized in that: It includes a drive shaft (1) and a universal joint (2) connected to at least one end of the drive shaft (1); The drive shaft (1) includes a drive shaft body (101) having a cavity (101A) and a connecting part (102) provided at the end of the drive shaft (1). The connecting part (102) is provided with an insertion hole (10221) communicating with the cavity (101A). The mounting body (201) of the universal joint (2) is provided with a plug shaft (202), which can be inserted into the insertion hole (10221), and an anti-rotation structure is provided between the plug shaft (202) and the connecting part (102) to prevent the mounting body (201) from rotating relative to the drive shaft (1).

2. The drive shaft assembly according to claim 1, characterized in that: The plug shaft (202) has a cavity (2021) inside, the cavity (2021) extends along the axial direction of the plug shaft (202), and the cavity (2021) is connected to the cavity (101A) inside the transmission shaft body (101).

3. The drive shaft assembly according to claim 2, characterized in that: The insertion shaft (202) and the mounting body (201) are integrally formed. The space inside the mounting body (201) is connected to the cavity (2021), and a plug (3) is placed at the connection point.

4. The drive shaft assembly according to claim 3, characterized in that: A sealing gasket (4) is provided between the plug (3) and the mounting body (201) to seal the gap between them.

5. The drive shaft assembly according to claim 2, characterized in that: The connecting part (102) includes a first sleeve (1021) and a second sleeve (1022) that are connected to each other. The connecting part (102) is connected to the drive shaft body (101) through the first sleeve (1021). The through hole in the second sleeve (1022) constitutes the insertion hole (10221). The outer diameter of the first sleeve (1021) is the same as the outer diameter of the drive shaft body (101), and the outer diameter of the second sleeve (1022) is smaller than the outer diameter of the first sleeve (1021).

6. The drive shaft assembly according to claim 5, characterized in that: It also includes a protective sleeve (5) fitted onto the insertion part of the plug shaft (202) and the connecting part (102). One end of the protective sleeve (5) is fastened to the mounting body (201) by a first clamp (6), and the other end is fastened to the second sleeve (1022) by a second clamp (7).

7. The drive shaft assembly according to claim 6, characterized in that: The side wall of the cavity (2021) near the mounting body (201) is provided with a vent hole (2022), and the space formed by the protective sleeve (5), the plug shaft (202) and the second sleeve (1022) communicates with the cavity (2021) through the vent hole (2022).

8. The drive shaft assembly according to any one of claims 1-7, characterized in that: The plug shaft (202) is provided with an anti-detachment part (9), which can prevent the universal joint (2) from detaching from the drive shaft (1) along the axial direction of the drive shaft (1).

9. The drive shaft assembly according to claim 8, characterized in that: The anti-detachment part (9) includes a mounting groove (901) provided on the plug shaft (202) and a retaining ring (902) embedded in the mounting groove (901).

10. A vehicle, characterized in that: The vehicle is equipped with a driveshaft assembly as described in any one of claims 1-9.

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