A drive axle and vehicle

Abstract

The application belongs to the technical field of vehicles and discloses a drive axle and a vehicle, wherein the drive axle comprises an axle tube, a bearing seat, a half shaft and an oil seal, the bearing seat is arranged at the end of the axle tube, the half shaft is arranged in the bearing seat and the axle tube, the oil seal is arranged outside the half shaft and inside the bearing seat, the half shaft has a shaft head outside the bearing seat, the shaft head comprises a shaft body and a connecting part, the connecting part is uniformly and spacedly arranged along the circumference of the shaft body, the bearing seat has a fixing part, the fixing part is uniformly and spacedly provided with a plurality of fixing holes along the circumference of the bearing seat, and the end face of the bearing seat, which is away from the axle tube, is provided with a positioning part, the positioning part is arranged along the circumference of the half shaft and is used for positioning a counterpiece, thereby avoiding the situation that the half shaft needs to be disassembled when the axle hub is adapted, reducing the difficulty of modification of the vehicle, and ensuring the sealing effect of the oil seal and the service life of the half shaft.

Description

Technical Field

[0001] This application belongs to the technical field of vehicles, specifically relating to a drive axle and a vehicle. Background Technology

[0002] With the popularization of off-road knowledge, users' demand for vehicle modification is becoming increasingly strong. The drive axle is an important component of the vehicle's transmission system. Its main function is to transmit the engine's power to the drive wheels, while also realizing functions such as deceleration and torque increase, changing the direction of power transmission, and allowing the left and right drive wheels to rotate at different speeds. Moreover, the drive axle is a key modification component for users to improve the vehicle's off-road capability.

[0003] Existing drive axles typically include an axle tube, a half-shaft passing through the axle tube, a bearing housing located at the end of the axle tube, a bearing sleeved outside the half-shaft and located inside the bearing housing, and an oil seal sleeved outside the half-shaft and located inside the bearing housing.

[0004] To improve vehicle passability, it's often necessary to replace the conventional wheel hub connected to the half-shaft with a portal axle hub. However, since both the half-shaft and bearing housing typically use flange structures at their ends to connect to the conventional wheel hub, and these flange structures are usually irregularly designed, fitting the flange structures on the half-shaft and bearing housing to the portal axle hub during installation is quite difficult. This necessitates cutting the half-shaft to remove the flange structure at its end, then welding the new connection structure to the end of the half-shaft, or simply replacing the half-shaft altogether. However, this process can be challenging during half-shaft disassembly and assembly. This could cause the oil seal to shift or deviate under the action of the half-shaft, thus affecting the sealing effect of the oil seal and ultimately leading to problems such as oil leakage in the modified drive axle. At the same time, since the portal axle hub is connected to the flange structure on the bearing housing by bolts, and the hole structure on the flange structure is usually larger than the diameter of the bolt to facilitate the installation of the bolts, the portal axle hub will shift downward under its own weight before the bolts are tightened, and the position of the portal axle hub cannot be changed after the bolts are tightened. This results in uneven stress on the connection structure at the end of the half-shaft in its circumferential direction, thus affecting the service life of the half-shaft. Utility Model Content

[0005] This application provides a drive axle that ensures the sealing effect of the oil seal and the service life of the half shaft while reducing the difficulty of modification.

[0006] The technical solution adopted in this application is as follows:

[0007] A drive axle includes an axle tube, a bearing housing at the end of the axle tube, a half-shaft passing through the axle tube and the bearing housing, and an oil seal sleeved on the outside of the half-shaft and located inside the bearing housing. The half-shaft has a shaft end located outside the bearing housing. The shaft end includes a shaft body and a connecting portion disposed on the outer peripheral surface of the shaft body. The connecting portion has a plurality of evenly spaced portions along the circumference of the shaft body. The bearing housing has a fixing portion. The fixing portion has a plurality of evenly spaced fixing holes along the circumference of the bearing housing. The end face of the bearing housing opposite to the axle tube is provided with a positioning portion. The positioning portion extends along the circumference of the half-shaft and is used for positioning mating parts.

[0008] By adopting the above technical solution, since multiple connecting parts are evenly spaced along the circumference of the shaft, and multiple fixing holes are evenly spaced along the circumference of the fixing part, the difficulty of adapting the portal axle hub is reduced when modifying a vehicle equipped with the drive axle of this application to improve its passability. This reduces the difficulty of modifying vehicles equipped with the drive axle of this application and improves the user experience. At the same time, it avoids the need to disassemble and reassemble the half shaft when modifying a vehicle equipped with the drive axle of this application to improve its passability. This minimizes the disassembly and reassembly of original parts during vehicle modification to ensure vehicle reliability, improves vehicle modification efficiency and reduces modification costs, and avoids the possibility of oil seal displacement or misalignment during vehicle modification, thereby ensuring the sealing effect of the oil seal.

[0009] Furthermore, since a positioning part is provided on the end face of the bearing housing away from the axle tube, and the positioning part extends circumferentially along the half shaft, the positioning part can be used to cooperate with the conventional wheel hub or portal axle hub to position the conventional wheel hub or portal axle hub, so as to prevent the conventional wheel hub or portal axle hub from shifting downward, so that the conventional wheel hub and portal axle hub are kept coaxial with the half shaft, thereby making the axle head axially balanced, ensuring the service life of the half shaft, and further increasing the reliability of the vehicle.

[0010] Optionally, the connecting part is a rib provided on the outer peripheral surface of the shaft, and each rib extends along the axial direction of the half shaft.

[0011] By adopting the above technical solution, since the connecting part is a rib located on the outer peripheral surface of the axle, on the one hand, more connecting parts can be set on the outside of the axle to increase the connection and mating points between the half shaft and the conventional wheel hub or portal axle hub, thereby increasing the transmission stability between the half shaft and the conventional wheel hub or portal axle hub. On the other hand, it can further reduce the difficulty of adapting to the portal axle hub, thereby further reducing the difficulty of modifying vehicles equipped with the drive axle of this application.

[0012] Furthermore, since the ribs extend along the axial direction of the half-shaft, on the one hand, it reduces the difficulty of assembling conventional wheel hubs or portal axle hubs to the axle head, thereby further reducing the difficulty of vehicle modification and further improving the efficiency of vehicle modification. On the other hand, it can further increase the transmission stability between the half-shaft and conventional wheel hubs or portal axle hubs.

[0013] Optionally, the positioning part extends continuously along the circumference of the half-axis;

[0014] And / or, the positioning portion is provided in a plurality of circumferentially spaced portions along the half-axis.

[0015] By adopting the above technical solution, since the positioning part is continuously extended along the circumference of the half shaft, the structural strength of the positioning part is increased on the one hand, so as to increase the positioning effect of the positioning part on the conventional wheel hub or portal axle wheel hub. On the other hand, the contact area between the positioning part and the conventional wheel hub or portal axle wheel hub is increased, so as to increase the connection stability between the conventional wheel hub or portal axle wheel hub and the bearing housing, and further increase the positioning effect of the positioning part on the conventional wheel hub or portal axle wheel hub.

[0016] Because multiple positioning parts are spaced circumferentially along the half-shaft, the amount of raw materials required for the production of bearing housings is reduced while ensuring the positioning effect for conventional wheel hubs and portal axle wheel hubs. This reduces the production cost of bearing housings and also reduces their weight, thus facilitating lightweight vehicle design.

[0017] Optionally, the dimension of the shaft head in the radial direction of the half shaft is smaller than the diameter of the half shaft;

[0018] And / or, the end of the shaft head opposite to the bearing housing is provided with a guide surface, the guide surface extending circumferentially along the shaft head;

[0019] And / or, the end of the positioning part away from the bearing seat is provided with a guide surface, the guide surface is provided on the outer peripheral surface of the positioning part and extends circumferentially along the half shaft.

[0020] By adopting the above technical solution, since the radial dimension of the axle head is smaller than the diameter of the half-shaft, when modifying the vehicle to improve its passability, it is possible to modify the vehicle by fitting a connecting piece on the outside of the axle head and connecting it to a conventional wheel hub or portal axle hub drive. This further facilitates the modification of the vehicle and avoids the need to disassemble and reassemble the half-shaft, thereby ensuring the efficiency of the vehicle modification and the reliability of the modified vehicle.

[0021] Because a guide surface is provided at the end of the axle head away from the bearing housing, and the guide surface extends circumferentially along the axle head, the size of the end of the axle head away from the bearing housing is reduced. This allows the guide surface at the end of the axle head to guide the conventional wheel hub or portal axle hub during installation, thereby reducing the installation difficulty of the conventional wheel hub or portal axle hub and improving the installation efficiency of the conventional wheel hub or portal axle hub.

[0022] Because a guide surface is provided at the end of the positioning part away from the bearing housing, and the guide surface is located on the outer peripheral surface of the positioning part and extends circumferentially along the half shaft, the size of the end of the positioning part away from the bearing housing is reduced. This allows the guide surface at the end of the positioning part to guide the conventional wheel hub or portal axle wheel hub during installation, further reducing the installation difficulty of the conventional wheel hub or portal axle wheel hub and thus further improving the installation efficiency of the conventional wheel hub and portal axle wheel hub.

[0023] Optionally, the drive axle further includes a bearing sleeved on the outside of the half shaft, the bearing being located inside the bearing housing, the half shaft also having a shoulder located outside the bearing, the shoulder having an inner end face and an outer end face opposite to the inner end face, the inner end face abutting against the bearing, and the oil seal being sleeved on the outside of the shoulder.

[0024] By adopting the above technical solution, since the inner end face of the shoulder abuts against the bearing and the oil seal is sleeved on the outside of the shoulder, the shoulder can be used to limit the bearing to increase the bearing's stability. On the other hand, the oil seal and the shoulder can be used to seal the bearing housing to prevent the oil inside the bridge tube from leaking through the bearing housing, thereby ensuring the airtightness of the bridge tube.

[0025] Optionally, a recess is provided on the outer peripheral surface of the shoulder near one end of the bearing, and the recess extends circumferentially along the shoulder.

[0026] By adopting the above technical solution, when assembling the drive axle, the oil seal is usually installed into the bearing housing first, and then the half shaft is installed. However, in this application, a recess is provided on the outer circumferential surface of the shaft shoulder near the bearing end, and the recess is designed to extend circumferentially along the shaft shoulder. This recess can guide the oil seal and the half shaft, making it easier to install the half shaft in place. At the same time, it avoids the possibility of displacement or misalignment of the oil seal during the installation of the half shaft, thus ensuring the sealing effect of the oil seal.

[0027] Optionally, the positioning part has an exposed surface facing away from the bearing housing, and the outer end face is located on the side of the exposed surface closer to the bearing.

[0028] By adopting the above technical solution, since the outer end face is located on the side of the exposed surface close to the bearing, the outer end face does not protrude from the exposed surface, so that part of the structure on the portal axle hub can extend into the positioning part or the bearing housing. This avoids the situation where the vehicle size changes due to the modification of the portal axle hub. At the same time, it can also increase the connection area between the conventional hub or portal axle hub and the half shaft, so as to further increase the transmission stability between the half shaft and the conventional hub and the portal axle hub.

[0029] Optionally, the bearing housing has a first receiving hole, a second receiving hole, and a third receiving hole inside. The first receiving hole, the second receiving hole, and the third receiving hole are arranged sequentially along the direction close to the bridge tube, and the diameter of the second receiving hole is larger than the diameter of the third receiving hole and smaller than the diameter of the first receiving hole. The bearing is located in the second receiving hole.

[0030] By adopting the above technical solution, since the diameter of the second receiving hole is larger than the diameter of the third receiving hole and smaller than the diameter of the first receiving hole, and the bearing is located in the second receiving hole, it achieves the effect of facilitating the installation of the bearing and improving the assembly efficiency of the drive axle. On the other hand, it can also use the end wall between the second and third receiving holes to limit the bearing and further increase the stability of the bearing.

[0031] Optionally, the bearing housing has a support section and a fixed section with an outer diameter smaller than the support section, the fixed section extending into the bridge tube, and the end of the support section near the bridge tube and / or the end of the bridge tube near the support section are provided with a clearance surface.

[0032] By adopting the above technical solution, since the fixed section extends into the interior of the bridge tube, the bearing housing can be positioned using the fixed section, so as to facilitate the welding of the bearing housing and the bridge tube together. At the same time, it also increases the connection area between the bearing housing and the bridge tube, thereby increasing the connection stability between the bearing housing and the bridge tube.

[0033] Furthermore, since the end of the support section near the bridge tube and / or the end of the bridge tube near the support section are provided with a clearance surface, a V-shaped groove is formed between the support section and the bridge tube. This not only facilitates welding the support section and the bridge tube together, but also increases the welding area between the support section and the bridge tube, thereby further increasing the connection stability between the bearing housing and the bridge tube.

[0034] This application also discloses a vehicle that facilitates vehicle modification while ensuring vehicle reliability.

[0035] A vehicle comprising a drive axle as described above.

[0036] By adopting the above technical solution, since the vehicle in this application uses the aforementioned drive axle, the need to disassemble and reassemble the half-shaft is avoided when modifying the vehicle to improve its passability. This achieves the effect of facilitating vehicle modification on the one hand, and ensures the sealing effect of the oil seal on the other hand, thereby ensuring the reliability of the vehicle.

[0037] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0038] 1. The drive axle in this application includes an axle tube, a bearing housing, a half-shaft, and an oil seal. The bearing housing is located at the end of the axle tube, the half-shaft passes through the bearing housing and the axle tube, the oil seal is sleeved on the outside of the half-shaft and located inside the bearing housing, and the half-shaft has a shaft end located outside the bearing housing. The shaft end includes a shaft body and a connecting part. The connecting part has multiple holes evenly spaced along the circumference of the shaft body. The bearing housing has a fixing part, and the fixing part has multiple fixing holes evenly spaced along the circumference of the bearing housing. This reduces the difficulty of adapting the portal axle hub when modifying a vehicle equipped with the drive axle of this application to improve its passability, thereby reducing the difficulty of modifying a vehicle equipped with the drive axle of this application and improving its performance. This design enhances the user experience and avoids the need to disassemble and reassemble the half-shaft when modifying vehicles equipped with the drive axle described in this application to improve their passability, thus ensuring the sealing effect of the oil seal. A positioning part is provided on the end face of the bearing housing opposite to the axle tube. This positioning part extends circumferentially along the half-shaft and is used to position the mating parts. It can then be used to position the conventional wheel hub or portal axle hub in conjunction with the conventional wheel hub or portal axle hub, ensuring that the connecting parts between the conventional wheel hub and portal axle hub and the half-shaft are coaxial with the half-shaft. This balances the force on the axle head in its own axial direction, ensuring the service life of the half-shaft and further increasing the reliability of the vehicle.

[0039] 2. The connecting part in this application is a rib located on the outer peripheral surface of the axle. This allows for the provision of a greater number of connecting parts on the outside of the axle, increasing the number of connection points between the half-shaft and conventional wheel hubs or portal axle hubs, thereby increasing the transmission stability between the half-shaft and conventional wheel hubs or portal axle hubs. On the other hand, it further reduces the difficulty of adapting to portal axle hubs, thereby further reducing the difficulty of modifying vehicles equipped with the drive axle of this application. Furthermore, each rib extends axially along the half-shaft, which reduces the difficulty of assembling conventional wheel hubs or portal axle hubs to the axle head, thereby further reducing the difficulty of vehicle modification and further improving the efficiency of vehicle modification. On the other hand, it further increases the transmission stability between the half-shaft and conventional wheel hubs or portal axle hubs.

[0040] 3. The positioning part in this application extends continuously along the circumference of the half-shaft, which on the one hand increases the structural strength of the positioning part to enhance the positioning effect of the positioning part on the conventional wheel hub or portal axle wheel hub, and on the other hand increases the contact area between the positioning part and the conventional wheel hub or portal axle wheel hub to enhance the connection stability between the conventional wheel hub or portal axle wheel hub and the bearing housing, and further enhances the positioning effect of the positioning part on the conventional wheel hub or portal axle wheel hub. Attached Figure Description

[0041] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0042] Figure 1 This is a partial structural diagram of the drive bridge described in one embodiment of this application;

[0043] Figure 2 This is a partial structural cross-sectional view of the drive axle described in one embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the structure of the half-shaft described in one embodiment of this application;

[0045] Figure 4 This is a cross-sectional view of the bearing housing described in one embodiment of this application;

[0046] Figure 5 This is a schematic diagram of the bearing housing in one embodiment of this application.

[0047] Figure label:

[0048] 1. Bridge tube; 11. Clearance surface; 2. Bearing housing; 21. Support section; 211. Fixing part; 212. Fixing hole; 213. Positioning part; 22. Fixing section; 221. Guide surface; 23. First receiving hole; 24. Second receiving hole; 25. Third receiving hole; 3. Half shaft; 31. Shaft head; 311. Shaft body; 312. Connecting part; 313. Guide surface; 32. Shaft shoulder; 321. Recess; 4. Oil seal; 5. Bearing. Detailed Implementation

[0049] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0051] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship 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 of this application.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example 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. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0054] Reference Figures 1 to 5 A drive axle is disclosed, comprising an axle tube 1, a bearing housing 2 disposed at the end of the axle tube 1, a half shaft 3 passing through the axle tube 1 and the bearing housing 2, and an oil seal 4 sleeved on the outside of the half shaft 3 and located inside the bearing housing 2. The half shaft 3 has a shaft head 31 located outside the bearing housing 2. The shaft head 31 includes a shaft body 311 and a connecting portion 312 disposed on the outer circumferential surface of the shaft body 311. The connecting portion 312 is evenly spaced along the circumference of the shaft body 311. The bearing housing 2 has a fixing portion 211. The fixing portion 211 is evenly spaced along the circumference of the bearing housing 2 and has a fixing hole 212. The end face of the bearing housing 2 opposite to the axle tube 1 is provided with a positioning portion 213. The positioning portion 213 extends along the circumference of the half shaft 3 and is used for positioning the mating parts.

[0055] Understandably, the mounting hole 212 is used for bolts to connect the bearing housing 2 to a conventional wheel hub or portal axle wheel hub.

[0056] It should be noted that the aforementioned mating parts refer to conventional wheel hubs, portal axle hubs, and other structures that can be connected to bearing housing 2.

[0057] Since multiple connecting portions 312 are evenly spaced along the circumference of the shaft 311, and multiple fixing holes 212 are evenly spaced along the circumference of the fixing portion 211, the difficulty of adapting the portal axle hub is reduced when modifying a vehicle equipped with the drive axle of this application to improve its passability. This reduces the difficulty of modifying vehicles equipped with the drive axle of this application and improves the user experience. At the same time, it avoids the need to disassemble and reassemble the half shaft 3 when modifying a vehicle equipped with the drive axle of this application to improve its passability. This minimizes the disassembly and reassembly of original parts during vehicle modification to ensure vehicle reliability, improves vehicle modification efficiency and reduces modification costs, and avoids the possibility of displacement or misalignment of the oil seal 4 during vehicle modification, thereby ensuring the sealing effect of the oil seal 4.

[0058] Furthermore, since the bearing housing 2 is provided with a positioning part 213 on the end face away from the axle tube 1, and the positioning part 213 extends along the circumference of the half shaft 3, the positioning part 213 can be used to cooperate with the conventional wheel hub or the portal axle hub to achieve the positioning of the conventional wheel hub or the portal axle hub, so as to avoid the conventional wheel hub or the portal axle hub from shifting downward, so that the conventional wheel hub and the portal axle hub and the half shaft 3 remain coaxial, thereby making the axle head 31 subject to force balance in its own axial direction, so as to ensure the service life of the half shaft 3, and further increase the reliability of the vehicle.

[0059] This application does not specify the location of the fixing part 211; preferably, refer to... Figure 5 The fixing part 211 is provided on the outer peripheral surface of the bearing housing 2 away from the bridge tube 1, so as to shorten the distance between the fixing part 211 and the conventional hub or portal axle hub, thereby shortening the length of the bolt used to fix the bearing housing 2 and the conventional hub or portal axle hub together, and thus ensuring the connection stability between the bearing housing 2 and the conventional hub or portal axle hub. Of course, in other embodiments, the fixing part 211 can also be provided at other positions on the outer peripheral surface of the bearing housing 2.

[0060] This application does not specifically limit the structure of the fixing part 211; preferably, refer to... Figure 1 , Figure 4 and Figure 5 The fixing part 211 is an annular structure that extends continuously along the circumference of the bearing housing 2. Multiple fixing holes 212 are evenly spaced along the circumference of the annular structure to ensure the structural strength of the fixing part 211, thereby ensuring the connection stability between the conventional wheel hub and the portal axle wheel hub and the bearing housing 2.

[0061] Preferably, the outer peripheral surface of the fixing part 211 is provided with a groove between two adjacent fixing holes 212 to reduce the volume of the bearing housing 2 and reduce the weight of the drive axle, thereby facilitating the lightweight design of the vehicle.

[0062] In other embodiments, the fixing part 211 may also be provided with multiple fixing parts evenly spaced along the circumference of the bearing seat 2, and each fixing part 211 extends along the circumference of the bearing seat 2. That is, the fixing part 211 has an arc-shaped structure, and each fixing part 211 is provided with multiple fixing holes 212 at intervals, or each fixing part 211 is provided with only one fixing hole 212.

[0063] This application does not specifically limit the structure of the connecting part 312. Preferably, the connecting part 312 is a rib provided on the outer peripheral surface of the shaft 311, and each rib extends along the axial direction of the half shaft 3.

[0064] It is understandable that the ribs on the outer surface of the shaft body 311 and the shaft body 311 together make the shaft head 31 form a spline.

[0065] Since the connecting part 312 is a rib provided on the outer peripheral surface of the shaft body 311, on the one hand, more connecting parts 312 can be provided on the outside of the shaft body 311 to increase the number of connection and mating points between the half shaft 3 and the conventional wheel hub or portal axle wheel hub, thereby increasing the transmission stability between the half shaft 3 and the conventional wheel hub or portal axle wheel hub. On the other hand, it can further reduce the difficulty of adapting to the portal axle wheel hub, thereby further reducing the difficulty of modifying vehicles equipped with the drive axle of this application.

[0066] Furthermore, since the rib extends along the axial direction of the half-shaft 3, it reduces the difficulty of assembling conventional wheel hubs or portal axle hubs to the axle head 31, thereby further reducing the difficulty of vehicle modification and further improving the efficiency of vehicle modification. On the other hand, it can further increase the transmission stability between the half-shaft 3 and conventional wheel hubs or portal axle hubs.

[0067] In other embodiments, the connecting part 312 may also be a block structure provided outside the shaft body 311, and multiple connecting parts 312 and shaft body 311 together constitute a structure with a regular polygonal cross-sectional shape, that is, the cross-sectional shape of the shaft head 31 is a regular polygon.

[0068] This application does not specifically limit the structure of the positioning part 213, which can adopt any of the following embodiments:

[0069] Implementation Method 1, in this implementation method, refer to Figure 1 and Figure 4The positioning part 213 extends continuously along the circumference of the half shaft 3. That is to say, the positioning part 213 is a ring-shaped rib structure surrounding the half shaft 3. This increases the structural strength of the positioning part 213, thereby increasing the positioning effect of the positioning part 213 on the conventional wheel hub or portal axle wheel hub. It also increases the contact area between the positioning part 213 and the conventional wheel hub or portal axle wheel hub, thereby increasing the connection stability between the conventional wheel hub or portal axle wheel hub and the bearing seat 2, and further increasing the positioning effect of the positioning part 213 on the conventional wheel hub or portal axle wheel hub.

[0070] In the second embodiment, multiple positioning parts 213 are provided at intervals along the circumference of the half-shaft 3. That is, the positioning parts 213 are arc-shaped rib structures. Thus, while ensuring the positioning effect of conventional wheel hubs and portal axle wheel hubs, the amount of raw materials required for manufacturing the bearing housing 2 is reduced, thereby reducing the manufacturing cost of the bearing housing 2. At the same time, the weight of the bearing housing 2 is also reduced, so as to facilitate the lightweight design of the vehicle.

[0071] This application does not specifically limit the relationship between the dimensions of the shaft head 31 and the diameter of the half shaft 3. Preferably, refer to... Figure 2 The radial dimension of the axle head 31 is smaller than the diameter of the half shaft 3. Therefore, when modifying the vehicle to improve its passability, the vehicle can be modified by fitting a connecting piece on the outside of the axle head 31 and connecting it to a conventional wheel hub or portal axle hub drive. This further facilitates the modification of the vehicle and avoids the need to disassemble and reassemble the half shaft 3, thus ensuring the efficiency of the modification and the reliability of the modified vehicle.

[0072] Of course, in other embodiments, the dimension of the shaft head 31 in the radial direction of the half shaft 3 may be equal to or greater than the diameter of the half shaft 3.

[0073] In a preferred embodiment, refer to Figure 3 The end of the shaft head 31 away from the bearing housing 2 is provided with a guide surface 313, which extends circumferentially along the shaft head 31.

[0074] It is understandable that the guide surface 313 is provided on the outer peripheral surface of the shaft head 31, and the guide surface 313 is inclined towards the central axis of the shaft body 311 in the direction away from the bearing seat 2.

[0075] Since the end of the axle head 31 away from the bearing housing 2 is provided with a guide surface 313, and the guide surface 313 extends circumferentially along the axle head 31, the size of the end of the axle head 31 away from the bearing housing 2 is reduced. This allows the guide surface 313 at the end of the axle head 31 to guide the conventional wheel hub or portal axle hub during installation, thereby reducing the installation difficulty of the conventional wheel hub or portal axle hub and improving the installation efficiency of the conventional wheel hub or portal axle hub.

[0076] In a preferred embodiment, refer to Figure 2 The end of the positioning part 213 away from the bearing seat 2 is provided with a guide surface 221. The guide surface 221 is provided on the outer peripheral surface of the positioning part 213 and extends along the circumferential direction of the half shaft 3.

[0077] It is understandable that the guide surface 221 is inclined in the direction away from the bearing housing 2 toward the direction where the half shaft 3 is located.

[0078] Because the positioning part 213 has a guide surface 221 at the end opposite to the bearing housing 2, and the guide surface 221 is provided on the outer peripheral surface of the positioning part 213 and extends along the circumferential direction of the half shaft 3, the size of the end of the positioning part 213 opposite to the bearing housing 2 is reduced. This allows the guide surface 221 at the end of the positioning part 213 to guide the conventional wheel hub or the portal axle wheel hub when installing it, thereby further reducing the installation difficulty of the conventional wheel hub or the portal axle wheel hub and further improving the installation efficiency of the conventional wheel hub and the portal axle wheel hub.

[0079] In a preferred embodiment, refer to Figure 2 The drive axle also includes a bearing 5 sleeved on the outside of the half shaft 3. The bearing 5 is located inside the bearing housing 2. The half shaft 3 also has a shoulder 32 located on the outside of the bearing 5. The shoulder 32 has an inner end face and an outer end face opposite to the inner end face. The inner end face abuts against the bearing 5. The oil seal 4 is sleeved on the outside of the shoulder 32.

[0080] It is understandable that the diameter of the shoulder 32 is larger than the diameter of the half shaft 3, and the shoulder 32 is located inside the bearing housing 2.

[0081] It should be noted that the shoulder 32 has two end faces in the axial direction of the half shaft 3. The outer end face of the shoulder 32 refers to the end face of the shoulder 32 that is close to the shaft head 31, and the inner end face of the shoulder 32 refers to the end face of the shoulder 32 that is far away from the shaft head 31.

[0082] Since the inner end face of the shoulder 32 abuts against the bearing 5, and the oil seal 4 is sleeved on the outside of the shoulder 32, the shoulder 32 can be used to limit the bearing 5 to increase the stability of the bearing 5. On the other hand, the oil seal 4 and the shoulder 32 can be used to seal the bearing housing 2 to prevent the oil inside the bridge tube 1 from leaking through the bearing housing 2, thereby ensuring the sealing performance of the bridge tube 1.

[0083] Preferably, the outer circumferential surface of the shoulder 32 is provided with an annular groove, which extends along the circumference of the shoulder 32, and the inner end of the oil seal 4 extends into the annular groove and contacts the groove wall. On the one hand, this increases the contact area between the oil seal 4 and the shoulder 32, thereby improving the sealing effect of the oil seal 4. On the other hand, the annular groove can also be used to position the oil seal 4, thereby increasing the stability of the oil seal 4.

[0084] Furthermore, refer to Figure 2 and Figure 3 A recessed portion 321 is provided on the outer peripheral surface of the shoulder 32 near the bearing 5, and the recessed portion 321 extends circumferentially along the shoulder 32.

[0085] When assembling the drive axle, the oil seal 4 is usually installed into the bearing housing 2 first, and then the half shaft 3 is installed. However, in this application, a recess 321 is provided on the outer circumferential surface of the shoulder 32 near the bearing 5, and the recess 321 is set to extend circumferentially along the shoulder 32. This recess 321 can guide the oil seal 4 and the half shaft 3, so as to facilitate the installation of the half shaft 3. At the same time, it avoids the possibility of displacement or skew of the oil seal 4 during the installation of the half shaft 3, so as to ensure the sealing effect of the oil seal 4.

[0086] This application does not specifically limit the formation method of the recess 321; preferably, refer to Figure 2 and Figure 3 The shoulder 32 has a clearance notch on its outer peripheral surface near the bearing 5. The clearance notch extends circumferentially along the shoulder 32, and the wall surface of the clearance notch facing the bearing 5 is curved, so that the clearance notch forms a recess 321. In other embodiments, the shoulder 32 has a slope on its outer peripheral surface near the bearing 5. The slope extends circumferentially along the shoulder 32, so that the slope forms a recess 321.

[0087] Furthermore, the positioning part 213 has an exposed surface facing away from the bearing housing 2, and the outer end face is located on the side of the exposed surface close to the bearing 5.

[0088] It is understandable that the projection of the bearing housing 2 and the positioning part 213 toward the axial direction of the half shaft 3 can completely cover the shoulder 32.

[0089] Since the outer end face is located on the side of the exposed surface close to the bearing 5, the outer end face does not protrude from the exposed surface, so that part of the structure on the portal axle hub can extend into the positioning part 213 or the bearing seat 2. This avoids the situation where the vehicle size changes due to the modification of the portal axle hub. At the same time, it can also increase the connection area between the conventional hub or portal axle hub and the half shaft 3, so as to further increase the transmission stability between the half shaft 3 and the conventional hub and the portal axle hub.

[0090] This application does not specifically limit the structure of the bearing housing 2; preferably, refer to... Figure 4 The bearing housing 2 has a first receiving hole 23, a second receiving hole 24 and a third receiving hole 25 inside. The first receiving hole 23, the second receiving hole 24 and the third receiving hole 25 are arranged sequentially along the direction close to the bridge tube 1, and the diameter of the second receiving hole 24 is larger than the diameter of the third receiving hole 25 and smaller than the diameter of the first receiving hole 23. The bearing 5 is located in the second receiving hole 24.

[0091] It is understandable that the central axes of the first receiving hole 23, the second receiving hole 24 and the third receiving hole 25 are collinear, and the second receiving hole 24 is connected to the first receiving hole 23 and the third receiving hole 25.

[0092] Since the diameter of the second receiving hole 24 is larger than the diameter of the third receiving hole 25 and smaller than the diameter of the first receiving hole 23, and the bearing 5 is located in the second receiving hole 24, it achieves the effect of facilitating the installation of the bearing 5 to improve the assembly efficiency of the drive axle. On the other hand, it can also limit the bearing 5 by using the end wall between the second receiving hole 24 and the third receiving hole 25 to further increase the stability of the bearing 5.

[0093] This application does not specifically limit the location of the oil seal 4. Preferably, the oil seal 4 is located in the first receiving hole 23, and there is a gap between the oil seal 4 and the positioning part 213 to increase the distance between the oil seal 4 and the outside of the bearing seat 2. This is to prevent other objects from contacting the oil seal 4 during the vehicle modification process, which could cause the oil seal 4 to shift or deviate, thereby ensuring the stability of the oil seal 4 and further ensuring the sealing effect of the oil seal 4.

[0094] Of course, in other embodiments, the oil seal 4 may also be located in the second receiving hole 24, and the oil seal 4 is located at the end of the bearing 5 away from the bridge tube 1.

[0095] Preferably, the dimension of the second receiving hole 24 in its own axial direction is equal to the dimension of the bearing 5 in its own axial direction, so as to ensure the contact area between the bearing 5 and the bearing housing 2, and further facilitate the installation of the bearing 5.

[0096] In other implementation examples, the diameters of the first receiving hole 23, the second receiving hole 24, and the third receiving hole 25 can also be set to be the same.

[0097] This application does not specify the fixed connection method between the bearing housing 2 and the bridge tube 1. Preferably, refer to Figure 4 and Figure 5 The bearing housing 2 has a support section 21 and a fixed section 22 with an outer diameter smaller than the support section 21. The fixed section 22 extends into the bridge tube 1, and the end of the support section 21 near the bridge tube 1 and / or the end of the bridge tube 1 near the support section 21 are provided with a clearance surface 11.

[0098] It is understood that the outer peripheral surface of the fixed section 22 contacts the inner wall of the bridge tube 1, and the bearing seat 2 and the bridge tube 1 are fixedly connected together by welding; the clearance surface 11 at the end of the support section 21 extends circumferentially along the support section 21, and the clearance surface 11 is inclined in the direction away from the bridge tube 1 in the direction away from the half shaft 3; the clearance surface 11 at the end of the bridge tube 1 extends circumferentially along the bridge tube 1, and the clearance surface 11 is inclined in the direction away from the half shaft 3 in the direction away from the support section 21.

[0099] Since the fixed section 22 extends into the interior of the bridge tube 1, the bearing housing 2 can be positioned using the fixed section 22, so as to facilitate the welding of the bearing housing 2 and the bridge tube 1 together. At the same time, it also increases the connection area between the bearing housing 2 and the bridge tube 1, thereby increasing the connection stability between the bearing housing 2 and the bridge tube 1.

[0100] Furthermore, since the end of the support section 21 near the bridge tube 1 and / or the end of the bridge tube 1 near the support section 21 are provided with a clearance surface 11, a V-groove is formed between the support section 21 and the bridge tube 1. This allows the welding position to be located in the V-groove when the bearing housing 2 is welded to the bridge tube 1, facilitating the welding of the support section 21 and the bridge tube 1. It also prevents the weld from protruding from the outer circumference of the bridge tube 1, thus ensuring the appearance quality of the drive axle. On the other hand, it increases the welding area between the support section 21 and the bridge tube 1, thereby further increasing the connection stability between the bearing housing 2 and the bridge tube 1.

[0101] The better one is to refer to Figure 2 and Figure 5 Both the end of the support section 21 near the bridge tube 1 and the end of the bridge tube 1 near the support section 21 are provided with a clearance surface 11 to further ensure the connection area of ​​the bearing housing 2 and the bridge tube 1 by welding, so as to further increase the stability of the two welded together.

[0102] Preferably, the end of the fixed section 22 away from the support section 21 is provided with a chamfer to facilitate the insertion of the fixed section 22 into the bridge tube 1.

[0103] In other implementation examples, the bearing housing 2 may also omit the design of the fixed section 22 and be fixedly connected to the bridge tube 1 by bolts or other means.

[0104] This application also discloses a vehicle that includes a drive axle as described above.

[0105] Since the vehicle in this application uses the aforementioned drive axle, the need to disassemble and reassemble the half-shaft 3 when modifying the vehicle to improve its passability is avoided. This achieves the effect of facilitating vehicle modification on the one hand, and ensures the sealing effect of the oil seal 4 on the other hand, thereby ensuring the reliability of the vehicle.

[0106] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0107] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0108] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A drive axle, characterized in that, The device includes a bridge tube (1), a bearing housing (2) located at the end of the bridge tube (1), a half shaft (3) passing through the bridge tube (1) and the bearing housing (2), and an oil seal (4) sleeved on the outside of the half shaft (3) and located inside the bearing housing (2). The half shaft (3) has a shaft head (31) located outside the bearing housing (2). The shaft head (31) includes a shaft body (311) and a connecting part (312) located on the outer peripheral surface of the shaft body (311). The connecting part (312) is provided with a plurality of evenly spaced parts along the circumference of the shaft (311). The bearing seat (2) has a fixing part (211). The fixing part (211) is provided with a plurality of fixing holes (212) evenly spaced along the circumference of the bearing seat (2). The bearing seat (2) is provided with a positioning part (213) on the end face away from the bridge tube (1). The positioning part (213) extends along the circumference of the half shaft (3) and is used to position the docking parts.

2. A drive axle according to claim 1, characterized in that, The connecting part (312) is a rib provided on the outer peripheral surface of the shaft (311), and each rib extends along the axial direction of the half shaft (3).

3. A drive axle according to claim 1, characterized in that, The positioning part (213) is continuously extended along the circumference of the half axis (3); And / or, the positioning part (213) is provided in a plurality of circumferentially spaced along the half axis (3).

4. A drive axle according to claim 1, characterized in that, The dimension of the shaft head (31) in the radial direction of the half shaft (3) is smaller than the diameter of the half shaft (3); And / or, the end of the shaft head (31) opposite to the bearing seat (2) is provided with a guide surface (313), the guide surface (313) extending circumferentially along the shaft head (31); And / or, the end of the positioning part (213) away from the bearing seat (2) is provided with a guide surface (221), the guide surface (221) is provided on the outer peripheral surface of the positioning part (213) and extends circumferentially along the half shaft (3).

5. A drive axle according to any one of claims 1-4, characterized in that, The drive axle also includes a bearing (5) sleeved on the outside of the half shaft (3), the bearing (5) being located inside the bearing housing (2), the half shaft (3) also having a shoulder (32) located outside the bearing (5), the shoulder (32) having an inner end face and an outer end face opposite to the inner end face, the inner end face abutting against the bearing (5), and the oil seal (4) being sleeved on the outside of the shoulder (32).

6. A drive axle according to claim 5, characterized in that, The shoulder (32) has a recess (321) on its outer peripheral surface near the bearing (5), and the recess (321) extends circumferentially along the shoulder (32).

7. A drive axle according to claim 5, characterized in that, The positioning part (213) has an exposed surface facing away from the bearing housing (2), and the outer end face is located on the side of the exposed surface close to the bearing (5).

8. A drive axle according to claim 5, characterized in that, The bearing housing (2) has a first receiving hole (23), a second receiving hole (24) and a third receiving hole (25) inside. The first receiving hole (23), the second receiving hole (24) and the third receiving hole (25) are arranged sequentially along the direction close to the bridge tube (1). The diameter of the second receiving hole (24) is larger than the diameter of the third receiving hole (25) and smaller than the diameter of the first receiving hole (23). The bearing (5) is located in the second receiving hole (24).

9. A drive axle according to any one of claims 1-4, characterized in that, The bearing housing (2) has a support section (21) and a fixed section (22) with an outer diameter smaller than the support section (21). The fixed section (22) extends into the bridge tube (1), and the end of the support section (21) near the bridge tube (1) and / or the end of the bridge tube (1) near the support section (21) is provided with a clearance surface (11).

10. A vehicle, characterized in that, Includes the drive axle as described in any one of claims 1-9 above.

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