Half shaft mounting structure, power system and vehicle

Abstract

The application belongs to the technical field of power systems, and discloses a half shaft mounting structure, a power system and a vehicle, wherein the half shaft mounting structure comprises a speed reducer and a half shaft, the speed reducer comprises a shell, a half shaft gear located in the shell and an oil seal located in the shell, the shell is provided with a through port, the inside of the half shaft gear is provided with an internal spline, the half shaft gear comprises a connecting section and a sealing section extending into the through port, the oil seal is sleeved outside the sealing section and located in the through port, thereby guaranteeing the sealing effect of the oil seal on the speed reducer, and the inner wall of the end of the sealing section away from the connecting section is provided with a guide surface, the end of the half shaft is provided with an external spline and a matching surface, the matching surface can be guided and matched with the guide surface, and thus the installation difficulty of the half shaft is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of power systems, specifically relating to a half-shaft mounting structure, a power system, and a vehicle. Background Technology

[0002] An automobile is a non-rail vehicle with multiple wheels that is driven by a power system. It is mainly used to transport people and goods and is one of the most important means of transportation in modern society. An automobile mainly includes a power system, chassis system, body system, and electrical and electronic system. The power system is mainly used to generate and transmit power. The reducer is the core component of the power system. It is responsible for reducing the high speed from the drive shaft to a low speed and then transmitting it to the wheels through the half-shaft. While reducing the speed, it can also proportionally increase the output torque so that the wheels can obtain a large enough driving force to propel the car.

[0003] Currently, half-shafts are typically located on the side of the oil pan. However, for vehicles with shorter engine compartments or vehicles with many components to be installed in the engine compartment, the installation position of the half-shaft may interfere with the oil pan. To avoid interference between the half-shaft installation position and the oil pan, a half-shaft through-cylinder structure has emerged on the market. This structure uses an installation channel designed into the oil pan, through which one end of the half-shaft passes and connects to the reducer's half-shaft gear. While this solves the problem of interference, the oil pan obstructs the reducer during installation, forcing a blind insertion. During this blind insertion, the half-shaft may become misaligned. Furthermore, to ensure the reducer's sealing and prevent internal oil leakage, an oil seal is typically installed inside the reducer, surrounding the half-shaft. This misalignment can cause the splines at the misaligned half-shaft end to scratch the oil seal, affecting the seal and allowing internal fluid to leak to the outside. Additionally, during blind insertion, the half-shaft end may misalign with the reducer's internal half-shaft gear, further complicating the installation process. Utility Model Content

[0004] This application provides a half-shaft mounting structure to ensure the sealing performance of the reducer and reduce the difficulty of installing the half-shaft.

[0005] The technical solution adopted in this application is as follows: A half-shaft mounting structure includes a reducer and a half-shaft. The reducer includes a housing, a half-shaft gear located inside the housing, and an oil seal located inside the housing. The housing has a passage opening. The half-shaft gear has an internal spline. The half-shaft gear includes a connecting section with teeth on the outside and a sealing section extending into the passage opening. The oil seal is sleeved outside the sealing section and located in the passage opening. The inner wall of the sealing section away from the connecting section has a guide surface. The end of the half-shaft has an external spline that connects with the internal spline and a mating surface located outside the external spline. The mating surface can guide and engage with the guide surface.

[0006] By adopting the above technical solution, since the sealing section extends into the passage and the oil seal is sleeved outside the sealing section and located at the passage, on the one hand, the oil seal is used to seal the housing to prevent oil leakage inside the housing. On the other hand, compared with the prior art where the oil seal is sleeved outside the half shaft, it avoids the contact between the external spline on the half shaft and the oil seal during blind insertion of the half shaft, thus preventing the external spline on the half shaft from scratching the oil seal. At the same time, it avoids the end of the half shaft applying force to the oil seal during blind insertion of the half shaft, which could cause the oil seal to shift or deviate, thereby preventing oil leakage inside the reducer through the oil seal. This improves the sealing effect of the oil seal and ensures the sealing performance of the reducer.

[0007] Furthermore, since the inner wall of the sealing section away from the connecting section is provided with a guide surface, and the end of the half shaft is provided with a mating surface located outside the external spline, the half shaft can be automatically adjusted during the blind insertion process by utilizing the guiding engagement of the mating surface and the guide surface. This allows the end of the half shaft to be aligned with the sealing section under the guiding engagement of the guide surface and the mating surface, thus enabling the end of the half shaft to smoothly extend into the sealing section and ultimately connect the external spline with the internal spline. This reduces the difficulty of blind insertion of the half shaft and improves the installation efficiency of the half shaft.

[0008] Optionally, the end of the connecting section away from the sealing section is provided with a communication port, and the half-shaft gear further includes a sealing cover located in the communication port; Alternatively, the end of the connecting section away from the sealing section may be closed.

[0009] By adopting the above technical solution, since a connecting port is provided at the end of the connecting section away from the sealing section, it facilitates the machining of the internal spline, thereby reducing the manufacturing difficulty of the half-shaft gear and thus reducing the production cost of the half-shaft gear. On the other hand, it can also reduce the weight of the half-shaft gear, thereby facilitating the lightweight design of the reducer and reducing the load on the reducer. Furthermore, since the sealing cover is located in the connecting port, the connecting port can be sealed by the sealing cover to prevent the oil inside the reducer from entering the interior of the half-shaft gear and leaking through the gap between the half-shaft gear and the half-shaft, thus further ensuring the sealing performance of the reducer.

[0010] Because the end of the connecting section away from the sealing section is closed, the oil inside the reducer is prevented from entering the interior of the half-shaft gear and leaking through the gap between the half-shaft gear and the half-shaft, thus further ensuring the sealing performance of the reducer.

[0011] Optionally, the internal spline is located inside the connecting section, and the inner diameter of the sealing section is larger than the inner diameter of the connecting section. The half-shaft gear also includes a variable diameter section located between the connecting section and the sealing section, and the inner diameter of the variable diameter section gradually decreases from the sealing section to the connecting section.

[0012] By adopting the above technical solution, since the internal spline is located inside the connecting section, the spline connection position between the external spline and the internal spline is located in the connecting section. Furthermore, since the teeth are located in the connecting section, it avoids the situation where a certain distance exists between the spline connection position of the external spline and the internal spline and the teeth, which would cause torque to be generated during the operation of the half-shaft gear. This improves the torsional stiffness of the half-shaft gear, ensuring the service life of the reducer. Moreover, since the inner diameter of the sealing section is larger than the inner diameter of the connecting section, and the variable diameter section is located between the sealing section and the connecting section, with the inner diameter of the variable diameter section gradually decreasing from the sealing section to the connecting section, during the blind insertion process of the half-shaft, the half-shaft can first rely on the guiding fit between the mating surface and the guide surface to smoothly insert the end of the half-shaft into the sealing section. Then, the contact fit between the mating surface and the inner wall of the variable diameter section achieves further guidance and adjustment of the half-shaft, making it easier for the external spline located on the half-shaft to extend into the connecting section and connect with the internal spline. This further facilitates the blind insertion of the half-shaft and reduces the installation difficulty of the half-shaft.

[0013] Optionally, the half-shaft includes a spline segment and a positioning segment located inside the spline segment. The outer diameter of the spline segment is smaller than the outer diameter of the positioning segment, and the external spline is located on the spline segment. The outer peripheral surface of the positioning segment abuts against the inner wall of the sealing segment.

[0014] By adopting the above technical solution, since the outer peripheral surface of the positioning section abuts against the inner wall of the sealing section, the contact area between the half shaft and the half shaft gear is increased, thereby increasing the connection stability between the half shaft and the half shaft gear.

[0015] Optionally, the end of the positioning segment near the spline segment is provided with a transition surface that can guide and cooperate with the guide surface, and the length of the internal spline is less than the length of the sealing segment.

[0016] By adopting the above technical solution, since the length of the internal spline is less than the length of the sealing section, and the end of the positioning section near the spline section is provided with a transition surface that can guide and cooperate with the guide surface, during the blind insertion of the half shaft, the spline section first extends into the sealing section under the guiding cooperation of the mating surface and the guide surface, then the positioning section extends into the sealing section under the guiding cooperation of the transition surface and the mating surface, and finally the spline section extends into the connecting section under the guiding cooperation of the mating surface and the inner wall of the reducing section, so that the external spline and the internal spline are finally connected. This allows the half shaft to be positioned by utilizing the contact cooperation between the positioning section and the sealing section during the blind insertion of the half shaft, thereby further reducing the installation difficulty of the half shaft and further improving the installation efficiency of the half shaft.

[0017] Optionally, the internal spline is located inside the sealing section; And / or, the half-shaft further includes a main body section located inside the external spline, the outer diameter of the main body section being larger than the inner diameter of the sealing section.

[0018] By adopting the above technical solution, since the internal spline is located inside the sealing section, the length that the half shaft needs to extend into the half shaft gear is shortened, thereby improving the assembly efficiency of the half shaft.

[0019] Since the main body section is located inside the external spline and the outer diameter of the main body section is larger than the inner diameter of the sealing section, the half shaft can be limited by the stop of the end of the main body section and the end of the sealing section during the blind insertion process, so as to avoid the half shaft being over-inserted into the half shaft gear, thereby achieving the effect of precise installation of the half shaft.

[0020] Optionally, the half-shaft mounting structure further includes an oil pan located on the side of the housing, the oil pan having a mounting channel, the inner diameter of the mounting channel gradually decreasing in the direction close to the housing, and the half-shaft passing through the mounting channel.

[0021] By adopting the above technical solution, since the inner diameter of the installation channel gradually decreases along the direction close to the housing, on the one hand, the channel wall of the installation channel can guide the half shaft during the blind insertion process, so as to further facilitate the installation of the half shaft. On the other hand, the diameter of the channel opening at the end of the installation channel away from the housing can be increased, so as to facilitate the insertion of the half shaft into the installation channel, thereby further facilitating the installation of the half shaft.

[0022] Optionally, the inner diameter of the mounting channel near the end of the housing is larger than the inner diameter of the sealing section and smaller than the outer diameter of the sealing section; And / or, the oil pan is provided with a positioning stop, and the housing is provided with a positioning rib extending into the positioning stop.

[0023] By adopting the above technical solution, since the inner diameter of the installation channel near the housing end is larger than the inner diameter of the sealing section and smaller than the outer diameter of the sealing section, the end of the half shaft can move to the end of the sealing section away from the connecting section under the guidance of the installation channel. This allows the end of the half shaft to smoothly extend into the sealing section under the guiding action of the mating surface and the guide surface, thereby further reducing the difficulty of installing the half shaft and further improving the installation efficiency of the half shaft.

[0024] Furthermore, since the oil pan is equipped with a positioning stop and the housing is equipped with positioning ribs that extend into the positioning stop, the oil pan and housing can be positioned by the cooperation of the positioning ribs and the positioning stop, so as to ensure that the channel opening near the housing end of the installation channel can be aligned with the sealing section, thereby facilitating the installation of the half shaft. At the same time, the cooperation of the positioning ribs and the positioning stop can also limit the movement of the housing and the oil pan, thereby increasing the stability of the housing and the oil pan.

[0025] This application also provides a power system to reduce the occurrence of oil leaks in the power system and improve the user experience.

[0026] A power system comprising the half-shaft mounting structure as described above.

[0027] By adopting the above technical solution, since the power system in this application uses the above-mentioned half-shaft mounting structure, the external spline on the half-shaft may scratch the oil seal during the blind insertion process of the half-shaft, thereby ensuring the sealing effect of the oil seal on the reducer, avoiding the possibility of oil leakage from the reducer, and thus reducing the occurrence of oil leakage in the power system, thereby improving the user experience, and also facilitating the assembly of the power system.

[0028] This application also provides a vehicle to reduce the occurrence of oil leaks and improve the user's driving experience.

[0029] A vehicle comprising a half-shaft mounting structure as described above or a power system as described above.

[0030] By adopting the above technical solution, since the vehicle in this application uses the above-mentioned half-shaft mounting structure or the above-mentioned power system, the occurrence of oil leakage in the vehicle is reduced, thereby improving the user's driving experience, and at the same time, it can also achieve the effect of facilitating vehicle assembly.

[0031] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. The half-shaft mounting structure in this application includes a reducer and a half-shaft. The reducer includes a housing, a half-shaft gear located inside the housing, and an oil seal located inside the housing. The housing is provided with a passage port. The half-shaft gear has an internal spline inside. The half-shaft gear includes a connecting section with teeth on the outside and a sealing section extending into the passage port. The oil seal is sleeved outside the sealing section and located in the passage port, thereby avoiding the possibility of the external spline on the half-shaft scratching the oil seal during the blind insertion of the half-shaft, thus ensuring the sealing effect of the oil seal on the reducer. Furthermore, the inner wall of the sealing section away from the connecting section is provided with a guide surface. The end of the half-shaft is provided with an external spline that connects with the internal spline and a mating surface located outside the external spline. The mating surface can guide and engage with the guide surface, thereby guiding the half-shaft so that the half-shaft can be inserted into the half-shaft gear more smoothly, reducing the installation difficulty of the half-shaft and improving the installation efficiency of the half-shaft.

[0032] 2. In this application, the connecting section away from the sealing section is provided with a communication port, which on the one hand facilitates the machining of the internal spline, thereby reducing the manufacturing difficulty of the half-shaft gear and thus reducing the production cost of the half-shaft gear. On the other hand, it can also reduce the weight of the half-shaft gear, thereby facilitating the lightweight design of the reducer and reducing the load on the reducer. The half-shaft gear also includes a sealing cover located in the communication port, which can be used to seal the communication port to prevent the oil inside the reducer from entering the interior of the half-shaft gear and leaking through the gap between the half-shaft gear and the half-shaft, thereby further ensuring the sealing performance of the reducer.

[0033] 3. In this application, the internal spline is located inside the connecting section, thus ensuring that the spline connection between the external spline and the internal spline is located within the connecting section. Since the teeth are located within the connecting section, a distance between the spline connection point and the teeth is avoided, preventing torque from being generated during the operation of the half-shaft gear. This improves the torsional stiffness of the half-shaft gear, ensuring the service life of the reducer. Furthermore, the inner diameter of the sealing section is larger than that of the connecting section. The half-shaft gear also includes a variable diameter section located between the connecting section and the sealing section. The inner diameter of the variable diameter section gradually decreases from the sealing section to the connecting section. During blind insertion of the half-shaft, the half-shaft can first rely on the guiding fit between the mating surface and the guide surface to smoothly insert the end of the half-shaft into the sealing section. Then, the contact fit between the mating surface and the inner wall of the variable diameter section further guides and adjusts the half-shaft, allowing the external spline located on the half-shaft to more easily extend into the connecting section and connect with the internal spline. This further facilitates blind insertion of the half-shaft and reduces the installation difficulty. Attached Figure Description

[0034] 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: Figure 1 This is a cross-sectional view of the half-shaft mounting structure described in one embodiment of this application; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 This is a cross-sectional view of the half-shaft gear described in one embodiment of this application; Figure 4 This is a cross-sectional view of the sealing cap according to one embodiment of this application; Figure 5 This is a cross-sectional view of the half-shaft gear described in another embodiment of this application; Figure 6 This is a partial structural cross-sectional view of the half-shaft described in one embodiment of this application.

[0035] Figure label: 1. Reducer; 11. Housing; 111. Pass-through port; 112. Positioning rib; 12. Half-shaft gear; 121. Connecting section; 122. Sealing section; 123. Sealing cover; 124. Variable diameter section; 125. Internal spline; 126. Tooth; 127. Guide surface; 128. Support tube; 129. Second snap ring groove; 13. Oil seal; 2. Half-shaft; 21. Spline section; 211. External spline; 212. Mating surface; 213. First snap ring groove; 22. Positioning section; 221. Transition surface; 23. Main body section; 3. Oil pan; 31. Installation channel; 32. Positioning stop; 4. Half-shaft snap ring. Detailed Implementation

[0036] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Reference Figures 1 to 6 A half-shaft mounting structure is disclosed, which includes a reducer 1 and a half-shaft 2. The reducer 1 includes a housing 11, a half-shaft gear 12 located inside the housing 11, and an oil seal 13 located inside the housing 11. The housing 11 is provided with a passage 111. The half-shaft gear 12 has an internal spline 125 inside. The half-shaft gear 12 includes a connecting section 121 with teeth 126 on the outside and a sealing section 122 extending into the passage 111. The oil seal 13 is sleeved on the outside of the sealing section 122 and located in the passage 111. The inner wall of the sealing section 122 away from the connecting section 121 is provided with a guide surface 127. The end of the half-shaft 2 is provided with an external spline 211 that is splined with the internal spline 125 and a mating surface 212 located outside the external spline 211. The mating surface 212 can guide and engage with the guide surface 127.

[0042] It is understood that multiple teeth 126 are sequentially arranged along the outer peripheral surface of the connecting section 121; the outer peripheral surface of the oil seal 13 contacts the wall of the through port 111, and the inner peripheral surface of the oil seal 13 contacts the outer peripheral surface of the sealing section 122, so as to seal the gap between the through port 111 and the sealing section 122; the sealing section 122 is a tube structure so that the end of the half shaft 2 can extend into the sealing section 122.

[0043] It should be noted that the outer side of the external spline 211 mentioned above refers to the side of the external spline 211 that is away from the middle position in the length direction of the half shaft 2.

[0044] Since the sealing section 122 extends into the passage 111, and the oil seal 13 is sleeved outside the sealing section 122 and located in the passage 111, the oil seal 13 seals the housing 11 to prevent oil leakage inside the housing 11. Furthermore, compared to the prior art where the oil seal 13 is sleeved outside the half-shaft 2, this avoids contact between the external spline 211 on the half-shaft 2 and the oil seal 13 during blind insertion of the half-shaft 2, thus preventing scratches on the oil seal 13 by the external spline 211 on the half-shaft 2. It also prevents the end of the half-shaft 2 from applying force to the oil seal 13 during blind insertion, thus preventing displacement or misalignment of the oil seal 13 and preventing oil leakage from the reducer 1 through the oil seal 13. This improves the sealing effect of the oil seal 13 and ensures the sealing performance of the reducer 1.

[0045] Furthermore, since the inner wall of the sealing section 122 away from the connecting section 121 is provided with a guide surface 127, and the end of the half shaft 2 is provided with a mating surface 212 located outside the outer spline 211, during the blind insertion process of the half shaft 2, the guiding engagement of the mating surface 212 and the guide surface 127 can be used to achieve automatic adjustment of the half shaft 2, so that the end of the half shaft 2 is aligned with the sealing section 122 under the guiding engagement of the guide surface 127 and the mating surface 212, thereby allowing the end of the half shaft 2 to smoothly extend into the sealing section 122, and finally allowing the outer spline 211 to be splined with the inner spline 125, thereby reducing the difficulty of blind insertion of the half shaft 2 and improving the installation efficiency of the half shaft 2.

[0046] This application does not specifically limit the structure of the guide surface 127; preferably, refer to... Figure 3 and Figure 5 The inner wall of the sealing section 122 at the end away from the connecting section 121 is provided with an enlarged diameter hole. The diameter of the enlarged diameter hole gradually increases in the direction away from the connecting section 121, and the inner wall surface of the enlarged diameter hole forms a guide surface 127 to improve the guiding effect of the guide surface 127 on the half shaft 2. In other embodiments, the inner wall of the sealing section 122 at the end away from the connecting section 121 is provided with a chamfer, and the chamfered wall surface forms the guide surface 127.

[0047] This application does not specifically limit the structure of the mating surface 212; preferably, refer to... Figure 6 The end of the half-shaft 2 is chamfered, and the chamfered wall forms a mating surface 212. This ensures the guiding effect between the mating surface 212 and the guide surface 127 while reducing the manufacturing difficulty of the half-shaft 2. In other embodiments, the end of the half-shaft 2 is provided with a reduced diameter portion located outside the external spline 211. The diameter of the reduced diameter portion gradually decreases in the direction away from the external spline 211, so that the outer peripheral surface of the reduced diameter portion forms the mating surface 212.

[0048] This application does not specify a particular sealing method for the connecting section 121, which can be any of the following embodiments: Implementation Method 1, in this implementation method, refer to Figure 3 and Figure 4 The connecting section 121 has a communication port at the end away from the sealing section 122, and the half-shaft gear 12 also includes a sealing cover 123 located in the communication port.

[0049] It is understood that the connecting section 121 is a pipe structure, and the pipe opening at the end of the connecting section 121 away from the sealing section 122 constitutes a communication port. The outer peripheral surface of the sealing cover 123 contacts the inner wall of the connecting section 121 to achieve the sealing of the connecting section 121 by the sealing cover 123.

[0050] Since the connecting section 121 has a communication port at the end away from the sealing section 122, it facilitates the machining of the internal spline 125, thereby reducing the manufacturing difficulty of the half-shaft gear 12 and reducing the production cost of the half-shaft gear 12. On the other hand, it can also reduce the weight of the half-shaft gear 12, thereby facilitating the lightweight design of the reducer 1 and reducing the load on the reducer 1.

[0051] Since the sealing cover 123 is located in the communication port, the communication port can be sealed by the sealing cover 123 to prevent the oil inside the reducer 1 from entering the interior of the half shaft gear 12 and leaking through the gap between the half shaft gear 12 and the half shaft 2, thereby further ensuring the sealing performance of the reducer 1.

[0052] This application does not specifically limit the material of the sealing cap 123. Preferably, the sealing cap 123 is made of fluororubber to ensure a good seal for the connection. In other embodiments, the sealing cap 123 may also be made of silicone rubber.

[0053] This application does not specifically limit the structure of the sealing cap 123; preferably, refer to... Figure 3 and Figure 4 The sealing cover 123 has a C-shaped cross section to ensure the contact area between the sealing cover 123 and the connecting section 121 while reducing the amount of raw materials required for the production of the sealing cover 123, thereby reducing the production cost of the sealing cover 123. It can also reduce the weight of the sealing cover 123 to reduce the load on the reducer 1.

[0054] The better one is to refer to Figure 4The sealing cover 123 has a support tube 128 inside. The outer peripheral surface of the support tube 128 abuts against the inner wall of the sealing cover 123. After the sealing cover 123 is installed on the connecting section 121, the sealing cover 123 can deform under the mutual compression of the inner wall of the connecting section 121 and the support tube 128. This makes the sealing cover 123 press tightly against the inner wall of the connecting section 121 and the outer peripheral surface of the support tube 128. This increases the sealing effect of the sealing cover 123 on the communication port and increases the connection stability between the sealing cover 123 and the connecting section 121.

[0055] Furthermore, refer to Figure 4 The outer diameter of the support tube 128 near the sealing section 122 gradually decreases in the direction of the sealing section 122, thereby forming a deformation space between the end of the support tube 128 near the sealing section 122 and the sealing cover 123 for the sealing cover 123 to deform. This allows the end of the sealing cover 123 near the sealing section 122 to deform into the deformation space during installation, making it easier to install the sealing cover 123 into the interior of the connecting section 121.

[0056] In other embodiments, the sealing cap 123 may also be a solid structure.

[0057] In the second embodiment, the end of the connecting section 121 away from the sealing section 122 is closed.

[0058] It is understandable that the end of the connecting section 121 away from the sealing section 122 is provided with a wall for sealing the interior of the connecting section 121, so as to seal the connecting section 121 by utilizing the wall itself.

[0059] Since the end of the connecting section 121 away from the sealing section 122 is closed, the oil inside the reducer 1 is prevented from entering the interior of the half-shaft gear 12 and leaking through the gap between the half-shaft gear 12 and the half-shaft 2, thereby further ensuring the sealing performance of the reducer 1.

[0060] This application does not specify the location of the internal spline 125, and it can be implemented in any of the following ways: Implementation Method 1, in this implementation method, refer to Figure 3 The internal spline 125 is located inside the connecting section 121, and the inner diameter of the sealing section 122 is larger than the inner diameter of the connecting section 121. The half-shaft gear 12 also includes a variable diameter section 124 located between the connecting section 121 and the sealing section 122. The inner diameter of the variable diameter section 124 gradually decreases from the sealing section 122 to the connecting section 121.

[0061] It is understandable that the inner diameter of the variable diameter section 124 near the sealing section 122 is equal to the inner diameter of the sealing section 122, and the inner diameter of the variable diameter section 124 near the connecting section 121 is equal to the inner diameter of the connecting section 121.

[0062] Since the internal spline 125 is located inside the connecting section 121, the spline connection position between the external spline 211 and the internal spline 125 is located in the connecting section 121. Furthermore, since the teeth 126 are located in the connecting section 121, the situation where a torque is generated when the half-shaft gear 12 is working is avoided due to a certain distance between the spline connection position between the external spline 211 and the internal spline 125 and the teeth 126. This improves the torsional stiffness of the half-shaft gear 12 and ensures the service life of the reducer 1.

[0063] Furthermore, since the inner diameter of the sealing section 122 is larger than that of the connecting section 121, the variable diameter section 124 is located between the sealing section 122 and the connecting section 121, and the inner diameter of the variable diameter section 124 gradually decreases from the sealing section 122 to the connecting section 121. Therefore, during the blind insertion of the half shaft 2, the half shaft 2 can first rely on the guiding engagement between the mating surface 212 and the guide surface 127 to allow the end of the half shaft 2 to be smoothly inserted into the sealing section 122. Then, the contact engagement between the mating surface 212 and the inner wall of the variable diameter section 124 is used to guide and adjust the half shaft 2 again, so that the external spline 211 of the half shaft 2 can be more easily inserted into the connecting section 121 and splined with the internal spline 125, thereby further facilitating the blind insertion of the half shaft 2 and further reducing the installation difficulty of the half shaft 2.

[0064] Preferably, the outer diameters of the connecting section 121, the variable diameter section 124, and the sealing section 122 are coaxially arranged and have the same outer diameter, so as to facilitate the manufacturing of the half-shaft gear 12.

[0065] Furthermore, refer to Figure 2 and Figure 6 The half-shaft 2 includes a spline section 21 and a positioning section 22 located inside the spline section 21. The outer diameter of the spline section 21 is smaller than the outer diameter of the positioning section 22, and the outer spline 211 is provided on the spline section 21. The outer peripheral surface of the positioning section 22 abuts against the inner wall of the sealing section 122.

[0066] It is understandable that the mating surface 212 is located at the end of the spline segment 21 that is away from the positioning segment 22.

[0067] It should be noted that the inner side of the spline segment 21 mentioned above refers to the side of the spline segment 21 that is close to the middle position in the length direction of the half shaft 2.

[0068] Since the outer peripheral surface of the positioning section 22 abuts against the inner wall of the sealing section 122, the contact area between the half shaft 2 and the half shaft gear 12 is increased, thereby increasing the connection stability between the half shaft 2 and the half shaft gear 12.

[0069] Furthermore, the positioning section 22 is provided with a transition surface 221 near the end of the spline section 21, which can be guided and engaged with the guide surface 127. The length of the inner spline 125 is less than the length of the sealing section 122. Then, during the blind insertion of the half shaft 2, the spline section 21 first extends into the sealing section 122 under the guiding engagement of the mating surface 212 and the guide surface 127. Then, the positioning section 22 extends into the sealing section 122 under the guiding engagement of the transition surface 221 and the mating surface 212. Finally, the spline section 21 extends into the connecting section 121 under the guiding engagement of the mating surface 212 and the inner wall of the variable diameter section 124. This allows the outer spline 211 to be splined with the inner spline 125. Thus, during the blind insertion of the half shaft 2, the half shaft 2 can be positioned by the contact engagement of the positioning section 22 and the sealing section 122, thereby reducing the installation difficulty of the half shaft 2 and further improving the installation efficiency of the half shaft 2.

[0070] This application does not specifically limit the formation method of the transition surface 221; preferably, refer to Figure 6 The positioning segment 22 has a chamfer at one end near the spline segment 21, and the chamfered wall forms a transition surface 221 to reduce the difficulty of forming the transition surface 221. In other embodiments, the positioning segment 22 has a small diameter portion at one end near the spline segment 21, and the diameter of the small diameter portion gradually decreases along the direction near the spline segment 21 so that the outer peripheral surface of the small diameter portion forms the transition surface 221.

[0071] Implementation Method Two: In this implementation method, refer to... Figure 5 The internal spline 125 is located inside the sealing section 122 to shorten the length that the half shaft 2 needs to extend into the half shaft gear 12, thereby improving the assembly efficiency of the half shaft 2.

[0072] In this embodiment, the structure of the connecting section 121 is not specifically limited. The connecting section 121 can be a solid structure or a tube structure. When the connecting section 121 is a tube structure, the sealing cap 123 in the above embodiment can be used to seal the connecting section 121.

[0073] In a preferred embodiment, refer to Figure 2 and Figure 6 The half-shaft 2 also includes a main body section 23 located inside the external spline 211, the outer diameter of the main body section 23 being larger than the inner diameter of the sealing section 122.

[0074] It should be noted that, in the embodiment where the inner spline 125 is located inside the connecting section 121, the main body section 23 is located on the side of the positioning section 22 away from the spline section 21; while in the embodiment where the inner spline 125 is located inside the sealing section 122, the main body section 23 and the spline section 21 are adjacent to each other in the length direction of the half shaft 2.

[0075] Since the main body section 23 is located inside the external spline 211, and the outer diameter of the main body section 23 is larger than the inner diameter of the sealing section 122, the half shaft 2 can be limited by the stop cooperation between the end of the main body section 23 and the end of the sealing section 122 during the blind insertion process, so as to avoid the half shaft 2 being over-inserted into the half shaft gear 12, thereby achieving the effect of precise installation of the half shaft 2.

[0076] In a preferred embodiment, refer to Figure 1 and Figure 2 The half-shaft mounting structure also includes an oil pan 3 located on the side of the housing 11. The oil pan 3 is provided with a mounting channel 31. The inner diameter of the mounting channel 31 gradually decreases along the direction close to the housing 11. The half-shaft 2 passes through the mounting channel 31.

[0077] It is understandable that the inner diameter of the mounting channel 31 near the housing 11 is larger than the outer diameter of the main body section 23, so as to ensure that the half shaft 2 can be inserted into the mounting channel 31.

[0078] Because the inner diameter of the mounting channel 31 gradually decreases along the direction close to the housing 11, on the one hand, the channel wall of the mounting channel 31 can guide the half shaft 2 during the blind insertion process, so as to further facilitate the installation of the half shaft 2. On the other hand, it can also increase the diameter of the channel opening at the end of the mounting channel 31 away from the housing 11, so as to facilitate the insertion of the half shaft 2 into the mounting channel 31, thereby further facilitating the installation of the half shaft 2.

[0079] Preferably, the central axis of the mounting channel 31 is set collinearly with the central axis of the half-shaft gear 12, so as to further reduce the difficulty of blind insertion of the half-shaft 2 and thus further improve the blind insertion efficiency of the half-shaft 2.

[0080] This application does not specifically limit the relationship between the inner diameter of the installation channel 31 and the sealing section 122. Preferably, refer to Figure 2The inner diameter of the installation channel 31 near the housing 11 is larger than the inner diameter of the sealing section 122 but smaller than the outer diameter of the sealing section 122. This allows the end of the half shaft 2 to move to the end of the sealing section 122 away from the connecting section 121 under the guidance of the installation channel 31. This allows the end of the half shaft 2 to smoothly extend into the sealing section 122 under the guiding action of the mating surface 212 and the guide surface 127, thereby further reducing the installation difficulty of the half shaft 2 and further improving the installation efficiency of the half shaft 2.

[0081] Preferably, the inner diameter of the mounting channel 31 near the housing 11 is greater than the inner diameter of the sealing section 122 and less than the inner diameter of the enlarged hole away from the connecting section 121, so that the mounting channel 31 can directly guide the end of the half shaft 2 to the position of the guide surface 127, thereby further facilitating the installation of the half shaft 2.

[0082] In other embodiments, the inner diameter of the mounting channel 31 near the end of the housing 11 can be set to be greater than the outer diameter of the sealing section 122 and smaller than the inner diameter of the through port 111.

[0083] Furthermore, refer to Figure 2 The oil pan 3 is provided with a positioning stop 32, and the housing 11 is provided with a positioning rib 112 extending into the positioning stop 32.

[0084] It is understandable that the positioning rib 112 can cooperate with the stop of the positioning stop 32.

[0085] Since the oil pan 3 is provided with a positioning stop 32 and the housing 11 is provided with a positioning rib 112 extending into the positioning stop 32, the positioning rib 112 and the positioning stop 32 can be used to position the oil pan 3 and the housing 11, so as to ensure that the channel opening of the installation channel 31 near the end of the housing 11 can be aligned with the sealing section 122, so as to further facilitate the installation of the half shaft 2. At the same time, the positioning rib 112 and the positioning stop 32 can also be used to limit the housing 11 and the oil pan 3, so as to increase the stability of the housing 11 and the oil pan 3.

[0086] This application does not specifically limit the formation method of the positioning stop 32. Preferably, the oil pan 3 has a groove-shaped structure surrounding the mounting channel 31 on the side near the housing 11, and the groove-shaped structure forms the positioning stop 32, thereby reducing the difficulty of forming the positioning stop 32. In other embodiments, the oil pan 3 has an annular rib surrounding the mounting channel 31 on the side near the housing 11, and the positioning stop 32 is formed inside the annular rib; or, the oil pan 3 has a hole structure on the side near the housing 11, and the hole structure forms the positioning stop 32.

[0087] This application does not specifically limit the formation method of the positioning rib 112. Preferably, the shell 11 is provided with an annular rib surrounding the passage opening 111. The annular rib can extend into the positioning stop 32, so that the annular rib forms the aforementioned positioning rib 112, thereby reducing the difficulty of forming the positioning rib 112 and also increasing the structural strength of the shell 11 through the positioning rib 112. In other embodiments, the shell 11 is provided with strip ribs, and multiple strip ribs are arranged at intervals along the circumference of the passage opening 111, so that multiple strip ribs together form the positioning rib 112; or, the positioning rib 112 is a protrusion protruding from the outer contour of the shell 11.

[0088] In a preferred embodiment, refer to Figure 2 The oil seal 13 is recessed in the end face of the sealing section 122 away from the connecting section 121. That is, the oil seal 13 is located at the non-end in the length direction of the sealing section 122, so as to further avoid the half shaft 2 from contacting the oil seal 13 when blindly inserting the half shaft 2, thereby further ensuring the sealing effect of the oil seal 13 on the reducer 1.

[0089] In a preferred embodiment, the reducer 1 further includes a bearing located inside the housing 11. The bearing is sleeved on the outside of the half-shaft gear 12, which can support the half-shaft gear 12 and the half-shaft 2 on the one hand, and reduce the rotational resistance of the half-shaft gear 12 on the other hand, so as to further reduce the load of the reducer 1.

[0090] Preferably, the bearing is sleeved outside the sealing section 122 and located inside the oil seal 13, that is, the bearing is located on the side of the oil seal 13 closer to the connecting section 121, so as to improve the bearing's support effect on the half-shaft gear 12 and the half-shaft 2.

[0091] In a preferred embodiment, refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 The half-shaft 2 has a first snap ring groove 213 on its outside and a second snap ring groove 129 on its inside. The half-shaft mounting structure also includes a half-shaft snap ring 4. The inner end of the half-shaft snap ring 4 is located in the first snap ring groove 213 and the outer end of the half-shaft snap ring 4 is located in the second snap ring groove 129. The half-shaft snap ring 4 is used to limit the movement of the half-shaft 2 by cooperating with the first snap ring groove 213 and the second snap ring groove 129, thereby increasing the connection stability between the half-shaft 2 and the half-shaft gear 12.

[0092] This application also discloses a power system that includes the half-shaft mounting structure as described above.

[0093] Because the power system in this application adopts the above-mentioned half-shaft mounting structure, the external spline 211 on the half-shaft 2 may scratch the oil seal 13 during the blind insertion process of the half-shaft 2, thereby ensuring the sealing effect of the oil seal 13 on the reducer 1, so as to avoid the possibility of oil leakage from the reducer 1, thereby reducing the occurrence of oil leakage in the power system, improving the user experience, and also facilitating the assembly of the power system.

[0094] This application also discloses a vehicle that includes the half-shaft mounting structure as described above or the power system as described above.

[0095] Because the vehicle in this application adopts the aforementioned half-shaft mounting structure or the aforementioned power system, the occurrence of oil leakage is reduced, thereby improving the user's driving experience and also facilitating vehicle assembly.

[0096] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0097] 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.

[0098] 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 half-shaft mounting structure, characterized in that, The device includes a reducer (1) and a half-shaft (2). The reducer (1) includes a housing (11), a half-shaft gear (12) located inside the housing (11), and an oil seal (13) located inside the housing (11). The housing (11) is provided with a passage (111). The half-shaft gear (12) has an internal spline (125) inside. The half-shaft gear (12) includes a connecting section (121) with teeth (126) on the outside and a sealing section (125) extending into the passage (111). 22), the oil seal (13) is sleeved on the outside of the sealing section (122) and located in the passage (111). The inner wall of the sealing section (122) away from the connecting section (121) is provided with a guide surface (127). The end of the half shaft (2) is provided with an outer spline (211) that is splined with the inner spline (125) and a mating surface (212) located outside the outer spline (211). The mating surface (212) can be guided and mated with the guide surface (127).

2. The half-shaft mounting structure according to claim 1, characterized in that, The connecting section (121) has a communication port at one end away from the sealing section (122), and the half-shaft gear (12) also includes a sealing cap (123) located in the communication port. Alternatively, the end of the connecting segment (121) away from the sealing segment (122) may be closed.

3. A half-shaft mounting structure according to any one of claims 1-2, characterized in that, The internal spline (125) is located inside the connecting section (121), and the inner diameter of the sealing section (122) is larger than the inner diameter of the connecting section (121). The half-shaft gear (12) also includes a variable diameter section (124) located between the connecting section (121) and the sealing section (122). The inner diameter of the variable diameter section (124) gradually decreases from the sealing section (122) to the connecting section (121).

4. The half-shaft mounting structure according to claim 3, characterized in that, The half-shaft (2) includes a spline segment (21) and a positioning segment (22) located inside the spline segment (21). The outer diameter of the spline segment (21) is smaller than the outer diameter of the positioning segment (22), and the outer spline (211) is located on the spline segment (21). The outer peripheral surface of the positioning segment (22) abuts against the inner wall of the sealing segment (122).

5. The half-shaft mounting structure according to claim 4, characterized in that, The positioning section (22) is provided with a transition surface (221) near the end of the spline section (21) that can guide and cooperate with the guide surface (127), and the length of the inner spline (125) is less than the length of the sealing section (122).

6. A half-shaft mounting structure according to any one of claims 1-2, characterized in that, The internal spline (125) is located inside the sealing section (122); And / or, the half shaft (2) further includes a body section (23) located inside the external spline (211), the outer diameter of the body section (23) being larger than the inner diameter of the sealing section (122).

7. A half-shaft mounting structure according to any one of claims 1-2, characterized in that, The half-shaft mounting structure also includes an oil pan (3) located on the side of the housing (11). The oil pan (3) is provided with an installation channel (31). The inner diameter of the installation channel (31) gradually decreases in the direction close to the housing (11). The half-shaft (2) passes through the installation channel (31).

8. The half-shaft mounting structure according to claim 7, characterized in that, The inner diameter of the mounting channel (31) near the end of the housing (11) is greater than the inner diameter of the sealing section (122) and smaller than the outer diameter of the sealing section (122); And / or, the oil pan (3) is provided with a positioning stop (32), and the housing (11) is provided with a positioning rib (112) extending into the positioning stop (32).

9. A power system, characterized in that, Includes the half-shaft mounting structure as described in any one of claims 1-8 above.

10. A vehicle, characterized in that, Includes the half-shaft mounting structure as described in any one of claims 1-8 or the power system as described in claim 9.

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