Half shaft positioning structure, power system and vehicle

Abstract

This application belongs to the technical field of power systems and discloses a half-shaft positioning structure, a power system, and a vehicle. The half-shaft positioning structure includes an oil pan and a half-shaft. The oil pan has a protruding end and an insert end, and an installation channel through which the oil pan passes. The installation channel has a positioning section, and the half-shaft has a splined section and a mating section. The diameter of the mating section is larger than the diameter of the splined section. The outer circumferential surface of the mating section can contact and fit with the inner wall surface of the positioning section, so that the half-shaft and the installation channel remain coaxial. This ensures that when the splined section at the end of the half-shaft passes through the oil seal located inside the reducer, there is a gap between the outer spline of the splined section and the oil seal. This avoids the possibility of the half-shaft scratching the oil seal during blind insertion of the half-shaft, thereby ensuring the sealing between the oil seal and the half-shaft, preventing oil leakage from the reducer, and reducing the failure rate of the reducer.

Description

Technical Field

[0001] This application belongs to the technical field of power systems, specifically relating to a half-shaft positioning 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 half-shaft gear of the reducer. While this solves the problem of interference between the half-shaft installation position and the oil pan, the oil pan obstructs the half-shaft gear during installation. This forces the half-shaft to be blind-inserted, which may cause misalignment. Furthermore, to ensure the reducer's sealing and prevent internal oil leakage, an oil seal is usually installed inside the reducer, fitted over the half-shaft. This misalignment can cause the splines at the misaligned half-shaft end to scratch the oil seal, affecting the seal between the oil seal and the half-shaft. Consequently, internal fluid can leak from the reducer through the oil seal to the outside, increasing the reducer's failure rate. Utility Model Content

[0004] This application provides a half-shaft positioning structure to prevent the half-shaft from scratching the oil seal, ensuring the sealing between the oil seal and the half-shaft, and reducing the failure rate of the reducer.

[0005] The technical solution adopted in this application is as follows: A half-shaft positioning structure includes an oil pan and a half-shaft. The oil pan has an extended end near a reducer and an inserted end opposite to the extended end. The oil pan has a mounting channel that penetrates the oil pan in the direction from the inserted end to the extended end. The mounting channel has a positioning section. The half-shaft has a splined section and a mating section. The splined section is located at the end of the half-shaft. The diameter of the mating section is larger than the diameter of the splined section. The outer peripheral surface of the mating section can contact and engage with the inner wall surface of the positioning section to keep the half-shaft coaxial with the mounting channel.

[0006] By adopting the above technical solution, when using the half-shaft positioning structure in this application, the oil pan is installed on the side of the reducer so that the reducer is located at the protruding end of the oil pan. At the same time, the central axis of the mounting channel is collinear with the central axis of the half-shaft gear inside the reducer. Then, the spline segment is aligned with the protruding end of the mounting channel, and a thrust parallel to the direction from the protruding end to the extended end is applied to the half-shaft so that the half-shaft extends into the mounting channel. Finally, the spline segment extends out of the mounting channel through the extended end and extends into the interior of the reducer to connect with the spline of the half-shaft gear inside the reducer housing.

[0007] Because the mounting channel has a positioning section, and the half-shaft has a splined section and a mating section, with the splined section located at the end of the half-shaft and the mating section having a larger diameter than the splined section, the outer circumferential surface of the mating section can contact and engage with the inner wall of the positioning section. Therefore, during the blind insertion process of the half-shaft, the contact between the outer circumferential surface of the mating section and the inner wall of the positioning section allows for the positioning of the half-shaft, ensuring that the half-shaft remains coaxial with the mounting channel. This also ensures that when the splined section at the end of the half-shaft passes through the oil seal located inside the reducer, there is a gap between the outer spline of the splined section and the oil seal. This prevents the half-shaft from becoming misaligned during blind insertion, which could cause the outer spline of the splined section to contact the oil seal and scratch it. This ensures the sealing between the oil seal and the half-shaft, preventing potential oil leakage from the reducer and reducing its failure rate.

[0008] Meanwhile, during the blind insertion process of the half-shaft, the half-shaft can maintain a coaxial state with the installation channel through the contact and engagement between the outer peripheral surface of the mating section and the inner wall surface of the positioning section. This also avoids the possibility of displacement of the oil seal due to the half-shaft being misaligned during the blind insertion process, thereby further ensuring the sealing performance between the oil seal and the half-shaft, as well as between the oil seal and the reducer housing, and further reducing the failure rate of the reducer.

[0009] Furthermore, since the diameter of the mating section is larger than that of the spline section, it ensures that the spline section of the half-shaft can pass through the mounting channel, allowing it to connect with the spline of the half-shaft gear inside the reducer. This means that when installing the half-shaft, only a thrust parallel to the direction from the insertion end to the extension end needs to be applied to complete the installation, thus reducing the difficulty of installing the half-shaft. On the other hand, it can increase the inner diameter of the mounting channel to a certain extent, making it easier to insert the half-shaft into the mounting channel, thereby improving the installation efficiency of the half-shaft.

[0010] Optionally, the half-shaft also has a sealing section for mating with an oil seal, the sealing section constituting the mating section.

[0011] By adopting the above technical solution, since the sealing section constitutes a mating section, on the one hand, during the blind insertion of the half shaft, the contact mating between the sealing section and the positioning section can be used to position the half shaft, so that the half shaft remains coaxial with the installation channel under the contact mating action of the outer circumferential surface of the sealing section and the inner wall of the positioning section. This avoids the situation where the half shaft is easily misaligned and scratches the oil seal during the blind insertion process, thereby ensuring the sealing effect of the oil seal on the half shaft and the reducer, and thus avoiding the phenomenon of oil leakage in the reducer. On the other hand, the half shaft can remain in its original design without modification, thereby reducing the manufacturing difficulty of the half shaft and improving its versatility.

[0012] Optionally, the half-shaft further has a sealing section for mating with an oil seal, the sealing section being located between the spline section and the mating section, and the diameter of the sealing section being larger than the diameter of the spline section and smaller than the diameter of the mating section.

[0013] By adopting the above technical solution, since the sealing section is located between the spline section and the mating section, and the diameter of the sealing section is larger than the diameter of the spline section but smaller than the diameter of the mating section, the diameter difference between the mating section and the spline section is increased. This increases the gap between the inner circumferential surface of the oil seal and the outer circumferential surface of the spline section during the blind insertion of the half-shaft. This further avoids the possibility that the outer spline of the spline section may contact the oil seal and scratch it during the blind insertion of the half-shaft, thus further ensuring the sealing performance of the oil seal on the half-shaft and the reducer housing. On the other hand, it can further increase the diameter of the installation channel, making it easier to insert the half-shaft into the installation channel through the insertion end, thereby further facilitating the installation of the half-shaft.

[0014] Optionally, the installation channel further includes a receiving section located at the end of the positioning section opposite to the extending end, and the inner diameter of the receiving section is larger than the outer diameter of the mating section.

[0015] By adopting the above technical solution, since the receiving section is located at the end of the positioning section opposite to the insertion end, and the inner diameter of the receiving section is larger than the outer diameter of the mating section, after the half shaft is installed in place, the mating section on the half shaft is located in the receiving section of the installation channel, so that there is a gap between the mating section on the half shaft and the receiving section of the installation channel, so as to avoid the mating section and the installation channel rubbing against each other when the half shaft rotates, thereby reducing the noise and abnormal sounds generated when the half shaft rotates, and also preventing the temperature of the half shaft and oil pan from rising due to the friction between the half shaft and the installation channel when the half shaft rotates.

[0016] Optionally, the mating section has a reduced diameter portion at one end near the spline section, the diameter of the reduced diameter portion at the end near the spline section is smaller than the diameter of the reduced diameter portion at the end away from the spline section, and the diameter of the reduced diameter portion at the end away from the spline section is equal to the diameter of the mating section.

[0017] By adopting the above technical solution, since the diameter of the reduced diameter section near the spline section is smaller than the diameter of the reduced diameter section away from the spline section, and the reduced diameter section is located at the end of the mating section near the spline section, the outer peripheral surface of the reduced diameter section can be used to contact and fit with the inner wall surface of the mounting channel to guide the half shaft during the blind insertion process, so as to facilitate the spline section of the half shaft to pass through the mounting channel, thereby further reducing the difficulty of installing the half shaft.

[0018] Furthermore, since the diameter of the reduced diameter section at the end furthest from the spline section is equal to the diameter of the mating section, during the blind insertion of the half shaft, the mating section can smoothly enter the positioning section of the installation channel under the guidance of the outer circumferential surface of the reduced diameter section, thereby improving the smoothness of the blind insertion process of the half shaft. At the same time, it can also ensure that the position of the mating section is at the thickest point of the half shaft diameter, so as to ensure the positioning effect of the half shaft by contacting the outer circumferential surface of the mating section with the inner wall surface of the positioning section.

[0019] Optionally, the half-shaft further includes a bearing mounting section located between the spline section and the mating section, wherein the diameter of the bearing mounting section is larger than the diameter of the spline section but smaller than the diameter of the mating section.

[0020] By adopting the above technical solution, since the diameter of the bearing mounting section is larger than the diameter of the spline section but smaller than the diameter of the mating section, and the bearing mounting section is located between the spline section and the mating section, on the one hand, the diameter difference between the spline section and the mating section can be further increased, thereby further increasing the gap between the outer circumferential surface of the spline section and the inner circumferential surface of the oil seal when blindly inserting the half shaft. This further avoids the possibility of the external spline on the outside of the spline section scratching the oil seal during the blind insertion of the half shaft, thus further ensuring the sealing effect of the oil seal on the half shaft and the reducer housing. On the other hand, it allows the spline section to smoothly pass through the bearing located inside the reducer housing during the blind insertion of the half shaft, thereby further reducing the installation difficulty of the half shaft.

[0021] Optionally, the mounting channel may further have a variable diameter section located at the end of the positioning section opposite to the protruding end, the inner diameter of the variable diameter section gradually increasing in the direction away from the positioning section.

[0022] By adopting the above technical solution, since the inner diameter of the variable diameter section gradually increases in the direction away from the positioning section, and the variable diameter section is located at the end of the positioning section away from the protruding end, on the one hand, the diameter of the channel opening at the insertion end of the installation channel is increased, so as to facilitate the insertion of the half shaft from the insertion end of the oil pan into the installation channel. On the other hand, it can avoid the occurrence of steps in the installation channel, so that the inner wall of the variable diameter section can guide the half shaft during the blind insertion process, thereby allowing the half shaft to smoothly enter the installation channel, and further reducing the difficulty of installing the half shaft.

[0023] This application also provides a power system to reduce the occurrence of oil leaks and the failure rate of the power system.

[0024] A power system includes the half-shaft positioning structure as described above and a reducer located at the extended end. The reducer has a housing, a half-shaft gear located inside the housing, and an oil seal located inside the housing. The splined section extends into the housing and is splinedly connected to the half-shaft gear. The oil seal is sleeved on the outside of the half-shaft.

[0025] By adopting the above technical solution, since the power system in this application uses the aforementioned half-shaft positioning structure, the positioning of the half-shaft can be achieved by utilizing the contact between the inner wall surface of the positioning section and the outer peripheral surface of the mating section during the blind insertion process of the half-shaft. This ensures that the half-shaft and the installation channel remain coaxial, thus preventing the external splines outside the spline section from scratching the oil seal during the blind insertion process. This guarantees the sealing effect of the oil seal between the half-shaft and the housing, reducing the occurrence of oil leakage in the power system and thereby reducing the failure rate of the power system.

[0026] Optionally, the distance from the end of the positioning section near the half-shaft gear to the end of the half-shaft gear near the oil pan is L1, and the distance from the end of the mating section away from the half-shaft gear to the end of the spline section away from the mating section is L2, where L1 and L2 satisfy: L1 < L2.

[0027] By adopting the above technical solution, since L1 < L2, during the blind insertion process of the half shaft, the spline segment will be inserted into the half shaft gear before the mating segment and the positioning segment separate. This avoids the situation where the end of the spline segment and the end of the half shaft gear are misaligned during the blind insertion process of the half shaft, which would increase the difficulty of installing the half shaft. This further reduces the difficulty of installing the half shaft.

[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 positioning 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 positioning structure or the above-mentioned power system, the half-shaft can be positioned by utilizing the contact fit between the outer peripheral surface of the mating section and the inner wall surface of the positioning section during the blind insertion process of the half-shaft. This ensures that the half-shaft and the installation channel remain coaxial, thereby avoiding the situation where the half-shaft is misaligned during the installation process and scratches the oil seal. This ensures the sealing effect of the oil seal on the half-shaft and the reducer housing, thereby reducing the occurrence of oil leakage in the vehicle and improving the user's driving experience.

[0031] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. The half-shaft positioning structure in this application includes an oil pan and a half-shaft. The oil pan has an extended end near the reducer and an inserted end opposite to the extended end. The oil pan has an installation channel that penetrates the oil pan in the direction from the inserted end to the extended end. The installation channel has a positioning section. The half-shaft has a splined section and a mating section. The splined section is located at the end of the half-shaft. The diameter of the mating section is larger than the diameter of the splined section. The outer circumferential surface of the mating section can contact and engage with the inner wall surface of the positioning section to keep the half-shaft and the installation channel coaxial. This ensures that when the splined section at the end of the half-shaft passes through the oil seal located inside the reducer, there is a gap between the outer spline of the splined section and the oil seal. This prevents the half-shaft from becoming misaligned during blind insertion, which could cause the outer spline of the splined section to contact the oil seal and scratch it. This ensures the sealing between the oil seal and the half-shaft, preventing oil leakage from the reducer and reducing the failure rate of the reducer.

[0032] 2. The half-shaft in this application also has a sealing section for sealing with an oil seal. The sealing section is located between the spline section and the mating section, and the diameter of the sealing section is larger than the diameter of the spline section but smaller than the diameter of the mating section. This increases the diameter difference between the mating section and the spline section, thereby increasing the gap between the inner circumferential surface of the oil seal and the outer circumferential surface of the spline section during blind insertion of the half-shaft. This further avoids the possibility that the outer spline of the spline section may contact the oil seal and scratch it during blind insertion of the half-shaft, thus further ensuring the sealing performance of the oil seal on the half-shaft and the reducer housing. On the other hand, it can further increase the diameter of the installation channel, making it easier to insert the half-shaft into the installation channel through the insertion end, thus further facilitating the installation of the half-shaft.

[0033] 3. The installation channel in this application also has a receiving section, which is located at the end of the positioning section opposite to the insertion end, and the inner diameter of the receiving section is larger than the outer diameter of the mating section. This allows the mating section on the half-shaft to be located in the receiving section of the installation channel after the half-shaft is installed in place, so that there is a gap between the mating section on the half-shaft and the receiving section of the installation channel. This avoids the mating section and the installation channel from rubbing against each other when the half-shaft rotates, thereby reducing the noise and abnormal sounds generated when the half-shaft rotates. It also avoids the situation where the temperature of the half-shaft and the oil pan rises due to the friction between the half-shaft and the installation channel when the half-shaft rotates. 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 partial structural cross-sectional view of the semi-axis positioning structure described in one embodiment of this application; Figure 2 This is a cross-sectional view of the oil pan according to one embodiment of this application; Figure 3 This is a schematic diagram of the structure of the half-shaft described in one embodiment of this application; Figure 4 This is a partial structural schematic diagram of the power system described in one embodiment of this application; Figure 5 for Figure 4 Enlarged view of part A in the middle.

[0035] Figure label: 1. Oil pan; 11. Mounting channel; 111. Positioning section; 112. Receiving section; 113. Reducing diameter section; 12. Positioning stop; 2. Half shaft; 21. Spline section; 211. Transition surface; 22. Mating section; 221. Reducing diameter section; 222. Guide surface; 23. Main body section; 24. Sealing section; 241. Guide section; 25. Bearing mounting section; 3. Reducer; 31. Housing; 311. Positioning rib; 32. Half shaft gear; 33. Oil seal; 34. Bearing. 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 5 A half-shaft positioning structure is disclosed, which includes an oil pan 1 and a half-shaft 2. The oil pan 1 has an extended end near the reducer 3 and an inserted end opposite to the extended end. The oil pan 1 has a mounting channel 11 that penetrates the oil pan 1 in the direction from the inserted end to the extended end. The mounting channel 11 has a positioning section 111. The half-shaft 2 has a spline section 21 and a mating section 22. The spline section 21 is located at the end of the half-shaft 2. The diameter of the mating section 22 is larger than the diameter of the spline section 21. The outer peripheral surface of the mating section 22 can contact and engage with the inner wall surface of the positioning section 111 so that the half-shaft 2 and the mounting channel 11 remain coaxial.

[0042] It is understood that the spline segment 21 has an external spline on the outside, and the mating segment 22 is located at the non-end of the half shaft 2, that is, the mating segment 22 is located on the side of the spline segment 21 near the middle position in the length direction of the half shaft 2; the half shaft 2 also includes a main body segment 23, the diameter of the main body segment 23 is less than or equal to the diameter of the mating segment 22; the inner diameter of the positioning segment 111 remains unchanged along the axial direction of the mounting channel 11.

[0043] It should be noted that the outer peripheral surface of the mating section 22 can contact and engage with the inner wall surface of the positioning section 111. This can be either a surface-to-surface contact between the outer peripheral surface of the mating section 22 and the inner wall surface of the positioning section 111, or a transitional fit between the outer peripheral surface of the mating section 22 and the inner wall surface of the positioning section 111. That is, a small gap or a small interference can be generated between the outer peripheral surface of the mating section 22 and the inner wall surface of the positioning section 111, so that when the outer peripheral surface of the mating section 22 contacts and engages with the inner wall surface of the positioning section 111, the half-shaft 2 is in a coaxial state with the installation channel 11.

[0044] When using the half-shaft positioning structure in this application, the oil pan 1 is installed on the side of the reducer 3 so that the reducer 3 is located at the protruding end of the oil pan 1. At the same time, the central axis of the mounting channel 11 is collinear with the central axis of the half-shaft gear 32 inside the reducer 3. Then, the spline segment 21 is aligned with the protruding end of the mounting channel 11. Then, a thrust parallel to the direction from the protruding end to the protruding end is applied to the half-shaft 2 so that the half-shaft 2 extends into the mounting channel 11. Finally, the spline segment 21 extends out of the mounting channel 11 through the protruding end and extends into the interior of the reducer 3 to spline connect with the half-shaft gear 32 inside the housing 31 of the reducer 3.

[0045] Because the mounting channel 11 has a positioning section 111, and the half-shaft 2 has a splined section 21 and a mating section 22, with the splined section 21 located at the end of the half-shaft 2 and the diameter of the mating section 22 being larger than that of the splined section 21, the outer circumferential surface of the mating section 22 can contact and engage with the inner wall surface of the positioning section 111. Therefore, during the blind insertion process of the half-shaft 2, the contact and engagement between the outer circumferential surface of the mating section 22 and the inner wall surface of the positioning section 111 can be used to position the half-shaft 2, ensuring that the half-shaft 2 remains coaxial with the mounting channel 11, thereby enabling the half-shaft... When the spline section 21 at the end of the gearbox 2 passes through the oil seal 33 located inside the gearbox 3, there is a gap between the outer spline of the spline section 21 and the oil seal 33. This is to prevent the half shaft 2 from being misaligned during the blind insertion process, which could cause the outer spline of the spline section 21 to come into contact with the oil seal 33 and cause the oil seal 33 to be scratched. This ensures the structural integrity of the oil seal 33 and thus ensures the sealing between the oil seal 33 and the half shaft 2, preventing the gearbox 3 from leaking oil and reducing the failure rate of the gearbox 3.

[0046] Meanwhile, during the blind insertion process of the half shaft 2, the half shaft 2 can maintain a coaxial state with the installation channel 11 under the contact and cooperation between the outer peripheral surface of the mating section 22 and the inner wall surface of the positioning section 111. This also avoids the possibility of displacement or misalignment of the oil seal 33 due to the possible skewness of the half shaft 2 during the blind insertion process. This further ensures the sealing performance between the oil seal 33 and the half shaft 2, as well as the sealing performance between the oil seal 33 and the reducer housing 31, thereby further reducing the failure rate of the reducer 3.

[0047] Furthermore, since the diameter of the mating section 22 is larger than the diameter of the spline section 21, it ensures that the spline section 21 of the half-shaft 2 can pass through the mounting channel 11, so that the spline section 21 can pass through the mounting channel 11 and be splinedly connected to the half-shaft gear 32 inside the reducer 3. This means that when installing the half-shaft 2, only a thrust parallel to the direction from the insertion end to the extension end needs to be applied to the half-shaft 2 to complete the installation, thereby reducing the difficulty of installing the half-shaft 2. On the other hand, it can increase the inner diameter of the mounting channel 11 to a certain extent, so as to facilitate the insertion of the half-shaft 2 into the mounting channel 11, thereby improving the installation efficiency of the half-shaft 2.

[0048] This application does not specifically limit the formation method of the positioning segment 111. Preferably, the positioning segment 111 is a channel structure formed by a portion of the oil pan 1 protruding towards the interior of the mounting channel 11, thereby reducing the difficulty of forming the positioning segment 111 and increasing the structural strength of the oil pan 1. In other embodiments, the inner wall surface of the mounting channel 11 is provided with ribs, and multiple ribs are spaced apart along the circumference of the mounting channel 11, and each rib extends along the axial direction of the mounting channel 11, so that the positions of the ribs inside the mounting channel 11 and the multiple ribs together form the positioning segment 111 of the mounting channel 11; or, the interior of the mounting channel 11 is provided with a roller or annular structure, so that the positions of the roller or annular structure inside the mounting channel 11 and the roller or annular structure together constitute the positioning segment 111 of the mounting channel 11.

[0049] This application does not specify the formation method of the mating segment 22, which can be adopted in any of the following embodiments: In this embodiment, the half-shaft 2 also has a sealing section 24 for sealing with the oil seal 33, and the sealing section 24 constitutes the mating section 22.

[0050] It is understood that in this embodiment, the sealing section 24 forms the mating section 22. The sealing section 24 is located between the spline section 21 and the main body section 23, and the diameter of the sealing section 24 is greater than or equal to the diameter of the main body section 23. The sealing section 24 can not only cooperate with the positioning section 111 to achieve positioning of the half shaft 2, but also the oil seal 33 inside the reducer 3 can be sleeved on the outside of the sealing section 24 to achieve sealing between the half shaft 2 and the reducer 3 housing 31.

[0051] It should be noted that the sealing cooperation between the sealing section 24 and the oil seal 33 means that after the half shaft 2 is installed in place, the oil seal 33 inside the reducer 3 can be fitted onto the outside of the sealing section 24, and the inner circumferential surface of the oil seal 33 abuts against the outer circumferential surface of the sealing section 24.

[0052] Since the sealing section 24 constitutes the mating section 22, on the one hand, during the blind insertion of the half shaft 2, the sealing section 24 and the positioning section 111 can be used to position the half shaft 2, so that the half shaft 2 remains coaxial with the installation channel 11 under the contact and mating action of the outer peripheral surface of the sealing section 24 and the inner wall surface of the positioning section 111. This avoids the situation where the half shaft 2 is easily deflected and scratches the oil seal 33 during the blind insertion process, thereby ensuring the sealing effect of the oil seal 33 on the half shaft 2 and the reducer 3, and thus avoiding the phenomenon of oil leakage in the reducer 3. On the other hand, the half shaft 2 can maintain its original design without modification, thereby reducing the manufacturing difficulty of the half shaft 2 and improving its versatility.

[0053] In this embodiment, preferably, the diameter of the sealing section 24 is larger than the diameter of the spline section 21 and smaller than the diameter of the main body section 23, so that after the half shaft 2 is installed in place, there is a gap between the half shaft 2 and the installation channel 11, so as to avoid the half shaft 2 possibly rubbing against the inner wall surface of the installation channel 11 during rotation.

[0054] Implementation Method Two: In this implementation method, refer to... Figure 1 and Figure 3 The half-shaft 2 also has a sealing section 24 for sealing with the oil seal 33. The sealing section 24 is located between the spline section 21 and the mating section 22, and the diameter of the sealing section 24 is larger than the diameter of the spline section 21 and smaller than the diameter of the mating section 22.

[0055] It is understandable that the mating segment 22 is formed by thickening a portion of the half-axis 2.

[0056] Since the sealing section 24 is located between the spline section 21 and the mating section 22, and the diameter of the sealing section 24 is larger than the diameter of the spline section 21 but smaller than the diameter of the mating section 22, it increases the diameter difference between the mating section 22 and the spline section 21. This increases the gap between the inner circumferential surface of the oil seal 33 and the outer circumferential surface of the spline section 21 during the blind insertion of the half shaft 2. This further avoids the possibility that the outer spline of the spline section 21 may contact the oil seal 33 and cause scratches to the oil seal 33 during the blind insertion of the half shaft 2. This further ensures the sealing performance of the oil seal 33 on the half shaft 2 and the reducer housing 31. On the other hand, it can further increase the diameter of the installation channel 11, making it easier to insert the half shaft 2 into the installation channel 11 through the insertion end, thus facilitating the installation of the half shaft 2.

[0057] Furthermore, refer to Figure 1 and Figure 2The installation channel 11 also has a receiving section 112, which is located at the end of the positioning section 111 opposite to the insertion end, and the inner diameter of the receiving section 112 is larger than the outer diameter of the mating section 22.

[0058] It is understandable that the diameter of the mating section 22 is larger than the diameter of the main body section 23, and the length of the receiving section 112 in the axial direction of the installation channel 11 is greater than the length of the mating section 22 outside the housing 31 of the reducer 3 after the half shaft 2 is installed in place, so that the mating section 22 can be located in the receiving section 112.

[0059] Since the receiving section 112 is located at the end of the positioning section 111 opposite to the insertion end, and the inner diameter of the receiving section 112 is larger than the outer diameter of the mating section 22, after the half shaft 2 is installed in place, the mating section 22 on the half shaft 2 is located in the receiving section 112 of the installation channel 11, so that there is a gap between the mating section 22 on the half shaft 2 and the receiving section 112 of the installation channel 11, so as to avoid the mating section 22 and the installation channel 11 rubbing against each other when the half shaft 2 rotates, thereby reducing the noise and abnormal sounds generated when the half shaft 2 rotates, and also preventing the temperature of the half shaft 2 and the oil pan 1 from rising due to the friction between the half shaft 2 and the installation channel 11 when the half shaft 2 rotates.

[0060] This application does not specifically limit the structure of the accommodating section 112; preferably, refer to... Figure 2 The inner diameter of the receiving section 112 gradually decreases along the direction close to the positioning section 111, so that when the half-shaft 2 is disassembled, the inner wall of the receiving section 112 can guide the half-shaft 2, ensuring that the half-shaft 2 can smoothly detach from the mounting channel 11, thereby reducing the difficulty of disassembling the half-shaft 2. In other embodiments, the receiving section 112 can also be a structure in which the inner diameter remains unchanged along the axial direction of the mounting channel 11, in order to reduce the difficulty of machining and manufacturing the mounting channel 11.

[0061] In other embodiments, ribs are provided on the outer peripheral surface of the half-shaft 2, and multiple ribs are spaced apart along the circumference of the half-shaft 2, with each rib extending along the axial direction of the half-shaft 2, so that the positions of the ribs on the half-shaft 2 and the multiple ribs together constitute the mating section 22 of the half-shaft 2; or, a roller or annular structure is provided on the outside of the half-shaft 2, so that the positions of the rollers or annular structures installed on the half-shaft 2 and the rollers or annular structures together constitute the mating section 22 of the half-shaft 2; or, a roller is provided in the mounting channel 11, and the positions of the rollers in the mounting channel 11 and the rollers together constitute the positioning section 111 of the mounting channel 11. In this embodiment, the diameter of the mating section 22 is equal to the diameter of the main body section 23, so that at least a portion of the main body section 23 constitutes the mating section 22.

[0062] In a preferred embodiment, refer to Figure 3A guide portion 241 is provided at one end of the sealing section 24 near the spline section 21. The diameter of the guide portion 241 at the end near the spline section 21 is smaller than the diameter of the guide portion 241 at the end away from the spline section 21. This allows the guide portion 241 to reduce the diameter of the sealing section 24 at the end near the spline section 21, thus facilitating the insertion of the sealing section 24 into the oil seal 33.

[0063] This application does not specifically limit the formation method of the guide portion 241. Preferably, the guide portion 241 is formed by a chamfer at the end of the sealing section 24 near the spline section 21, so as to reduce the difficulty of forming the guide portion 241. In other embodiments, the diameter of the end of the sealing section 24 near the spline section 21 is gradually reduced in the direction close to the spline section 21, so that the end of the sealing section 24 near the spline section 21 forms the guide portion 241.

[0064] In a preferred embodiment, refer to Figure 3 The mating section 22 has a reduced diameter section 221 at the end near the spline section 21. The diameter of the reduced diameter section 221 at the end near the spline section 21 is smaller than the diameter of the reduced diameter section 221 at the end away from the spline section 21, and the diameter of the reduced diameter section 221 at the end away from the spline section 21 is equal to the diameter of the mating section 22.

[0065] Since the diameter of the reduced diameter portion 221 near the spline section 21 is smaller than the diameter of the reduced diameter portion 221 away from the spline section 21, and the reduced diameter portion 221 is located at the end of the mating section 22 near the spline section 21, the outer peripheral surface of the reduced diameter portion 221 can be used to contact and engage with the inner wall surface of the mounting channel 11 during the blind insertion of the half shaft 2 to guide the half shaft 2, thereby facilitating the passage of the spline section 21 of the half shaft 2 through the mounting channel 11, and further reducing the difficulty of installing the half shaft 2.

[0066] Furthermore, since the diameter of the end of the reduced diameter section 221 away from the spline section 21 is equal to the diameter of the mating section 22, during the blind insertion of the half shaft 2, the mating section 22 can smoothly enter the positioning section 111 of the installation channel 11 under the guidance of the outer peripheral surface of the reduced diameter section 221, thereby improving the smoothness of the blind insertion process of the half shaft 2. At the same time, the position of the mating section 22 is the position with the thickest diameter of the half shaft 2, so as to ensure the positioning effect of the half shaft 2 by contacting the outer peripheral surface of the mating section 22 with the inner wall surface of the positioning section 111.

[0067] This application does not specifically limit the formation method of the reduced diameter portion 221; preferably, refer to... Figure 3The diameter of the mating section 22 near the spline section 21 gradually decreases along the direction close to the spline section 21, so that the end of the mating section 22 near the spline section 21 forms a reduced diameter portion 221, thereby improving the guiding effect of the reduced diameter portion 221 on the half shaft 2. In other embodiments, the end of the mating section 22 near the spline section 21 is provided with a chamfer, and the chamfer forms the reduced diameter portion 221.

[0068] In a preferred embodiment, refer to Figure 3 The diameter of the mating section 22 at the end away from the spline section 21 gradually decreases in the direction away from the spline section 21, so that the outer peripheral surface of the mating section 22 at the end away from the spline section 21 forms a guide surface 222 that can mate with the inner wall surface of the mounting channel 11. This avoids the possibility of the half shaft 2 getting stuck when it is removed from the mounting channel 11, thereby facilitating the disassembly of the half shaft 2.

[0069] In a preferred embodiment, refer to Figure 3 The spline segment 21 is provided with a transition surface 211 at the end away from the mating segment 22. The transition surface 211 can be guided and engaged with the hole structure at the end of the half shaft gear 32, so that the spline segment 21 can be inserted into the half shaft gear 32 more easily and smoothly, thereby further reducing the installation difficulty of the half shaft 2.

[0070] This application does not specifically limit the formation method of the transition surface 211. Preferably, the end of the spline segment 21 away from the mating segment 22 is provided with a chamfer, and the chamfered wall surface forms the transition surface 211, thereby reducing the difficulty of forming the transition surface 211 and thus reducing the manufacturing difficulty of the half shaft 2. In other embodiments, the diameter of the end of the spline segment 21 away from the mating segment 22 is gradually reduced along the direction away from the mating segment 22, so that the outer peripheral surface of the end of the spline segment 21 away from the mating segment 22 forms the transition surface 211.

[0071] In a preferred embodiment, refer to Figure 1 and Figure 3 The half-shaft 2 also has a bearing mounting section 25, which is located between the spline section 21 and the mating section 22. The diameter of the bearing mounting section 25 is larger than the diameter of the spline section 21 and smaller than the diameter of the mating section 22.

[0072] It is understandable that the bearing mounting section 25 is located between the sealing section 24 and the spline section 21. After the half shaft 2 is installed in place, the bearing 34 in the reducer 3 is fitted onto the outside of the bearing mounting section 25.

[0073] Since the diameter of the bearing mounting section 25 is larger than the diameter of the spline section 21 but smaller than the diameter of the mating section 22, and the bearing mounting section 25 is located between the spline section 21 and the mating section 22, it can further increase the diameter difference between the spline section 21 and the mating section 22. This further increases the gap between the outer circumferential surface of the spline section 21 and the inner circumferential surface of the oil seal 33 when blindly inserting the half shaft 2. This further avoids the possibility that the external spline of the spline section 21 might scratch the oil seal 33 during the blind insertion of the half shaft 2, thus further ensuring the sealing effect of the oil seal 33 on the half shaft 2 and the reducer housing 31. On the other hand, it allows the spline section 21 to pass smoothly through the bearing 34 located inside the reducer housing 31 during the blind insertion of the half shaft 2, thereby further reducing the installation difficulty of the half shaft 2.

[0074] This application does not specifically limit the structure of the installation channel 11; preferably, refer to... Figure 1 and Figure 2 The installation channel 11 also has a variable diameter section 113 located at the end of the positioning section 111 away from the protruding end, the inner diameter of the variable diameter section 113 gradually increasing in the direction away from the positioning section 111.

[0075] Since the inner diameter of the variable diameter section 113 gradually increases in the direction away from the positioning section 111, and the variable diameter section 113 is located at the end of the positioning section 111 away from the protruding end, the diameter of the channel opening at the insertion end of the installation channel 11 is increased on the one hand, so as to facilitate the insertion of the half shaft 2 from the insertion end of the oil pan 1 into the installation channel 11. On the other hand, it can avoid the occurrence of steps in the installation channel 11, so that the inner wall of the variable diameter section 113 can guide the half shaft 2 during the blind insertion process, thereby allowing the half shaft 2 to smoothly enter the installation channel 11, and further reducing the difficulty of installing the half shaft 2.

[0076] Preferably, the diameter of the variable diameter section 113 at the end closest to the positioning section 111 is equal to the diameter of the variable diameter section 113, so as to further improve the smoothness of the half shaft 2 when blindly inserting it.

[0077] In other embodiments, the design of the variable diameter section 113 can be omitted, and the positioning section 111 can be extended to the insertion end of the oil pan 1.

[0078] Reference Figure 4 and Figure 5 This application also discloses a power system, which includes the half-shaft positioning structure as described above and a reducer 3 located at the extended end. The reducer 3 has a housing 31, a half-shaft gear 32 located inside the housing 31, and an oil seal 33 located inside the housing 31. The spline segment 21 extends into the interior of the housing 31 and is splinedly connected to the half-shaft gear 32. The oil seal 33 is sleeved on the outside of the half-shaft 2.

[0079] Understandably, the housing 31 has a passage for the half shaft 2 to extend into, the half shaft gear 32, the passage and the mounting channel 11 are coaxially arranged, the half shaft 2 is provided with an internal spline that can connect with the external spline of the spline section 21, and the oil seal 33 is located at the passage of the housing 31; the reducer 3 also includes a bearing 34 located inside the housing 31, and the bearing 34 is sleeved on the outside of the bearing mounting section 25.

[0080] Because the power system in this application adopts the aforementioned half-shaft positioning structure, during the blind insertion of the half-shaft 2, the positioning section 111's inner wall surface can contact the mating section 22's outer peripheral surface to achieve positioning of the half-shaft 2, so that the half-shaft 2 and the mounting channel 11 remain coaxial. This avoids the possibility that the external spline on the spline section 21 might scratch the oil seal 33 during the blind insertion of the half-shaft 2, thereby ensuring the sealing effect of the oil seal 33 between the half-shaft 2 and the housing 31, reducing the occurrence of oil leakage in the power system, and thus reducing the failure rate of the power system.

[0081] In a preferred embodiment, refer to Figure 4 and Figure 5 The distance from the end of the positioning section 111 near the half-shaft gear 32 to the end of the half-shaft gear 32 near the oil pan 1 is L1, and the distance from the end of the mating section 22 away from the half-shaft gear 32 to the end of the spline section 21 away from the mating section 22 is L2. L1 and L2 satisfy: L1 < L2.

[0082] Since L1 < L2, during the blind insertion of the half-shaft 2, the spline segment 21 will be inserted into the half-shaft gear 32 before the mating segment 22 and the positioning segment 111 disengage. This avoids the situation where the end of the spline segment 21 and the end of the half-shaft gear 32 are misaligned during the blind insertion of the half-shaft 2, which would increase the difficulty of installing the half-shaft 2. This further reduces the difficulty of installing the half-shaft 2.

[0083] In a preferred embodiment, refer to Figure 2 and Figure 5 The oil pan 1 has a positioning stop 12 at its protruding end, and the housing 31 has a positioning rib 311 that extends into the positioning stop 12. The positioning stop 12 and the positioning rib 311 are used to limit the housing 31 and the oil pan 1 by interlocking. This allows the half shaft gear 32, the through port, and the half shaft gear 32 to remain coaxial under the interlocking action of the positioning stop 12 and the positioning rib 311, thereby facilitating the blind insertion of the half shaft 2.

[0084] This application does not specifically limit the structure of the positioning stop 12 and the positioning rib 311. Preferably, the positioning stop 12 is a groove-shaped structure surrounding the installation channel 11, and the positioning rib 311 is an annular rib surrounding the passage opening. After the annular rib extends into the groove-shaped structure, the outer peripheral surface of the annular rib contacts the inner wall of the groove-shaped structure to improve the limiting effect on the oil pan 1 and the housing 31. In other embodiments, the positioning stop 12 may also be a hole structure provided in the oil pan 1, and the positioning rib 311 may be a protruding rib protruding from the outer contour of the housing 31.

[0085] This application also discloses a vehicle that includes the half-shaft positioning structure as described above or the power system as described above.

[0086] Because the vehicle in this application adopts the aforementioned half-shaft positioning structure or the aforementioned power system, during the blind insertion process of the half-shaft 2, the half-shaft 2 can be positioned by utilizing the contact fit between the outer peripheral surface of the mating section 22 and the inner wall surface of the positioning section 111, so that the half-shaft 2 and the installation channel 11 remain coaxial. This avoids the half-shaft 2 from becoming misaligned during the installation process, which could scratch the oil seal 33. This ensures the sealing effect of the oil seal 33 on the half-shaft 2 and the reducer 3 housing 31, thereby reducing the occurrence of oil leakage in the vehicle and improving the user's driving experience.

[0087] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0088] 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.

[0089] The above description is merely an embodiment of this application and is not intended to limit 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 principle of this application should be included within the scope of the claims of this application.

Claims

1. A half shaft positioning structure characterized by, The device includes an oil pan (1) and a half shaft (2). The oil pan (1) has an extended end near the reducer (3) and an inserted end opposite to the extended end. The oil pan (1) has an installation channel (11) that passes through the oil pan (1) in the direction from the inserted end to the extended end. The installation channel (11) has a positioning section (111). The half shaft (2) has a spline section (21) and a mating section (22). The spline section (21) is located at the end of the half shaft (2). The diameter of the mating section (22) is larger than the diameter of the spline section (21). The outer peripheral surface of the mating section (22) can contact and engage with the inner wall surface of the positioning section (111) so that the half shaft (2) and the installation channel (11) remain coaxial.

2. A semi-axle positioning structure according to claim 1, wherein The half-shaft (2) also has a sealing section (24) for sealing with an oil seal (33), the sealing section (24) forming the mating section (22).

3. The semi-axle positioning structure of claim 1, wherein The half-shaft (2) also has a sealing section (24) for sealing with an oil seal (33), the sealing section (24) being located between the spline section (21) and the mating section (22), and the diameter of the sealing section (24) being larger than the diameter of the spline section (21) and smaller than the diameter of the mating section (22).

4. A semi-axle positioning structure according to claim 3, wherein The installation channel (11) also has a receiving section (112) located at one end of the positioning section (111) away from the insertion end, and the inner diameter of the receiving section (112) is greater than the outer diameter of the mating section (22).

5. A semi-axle positioning structure according to any one of claims 1-4, wherein, The mating section (22) has a reduced diameter section (221) at one end near the spline section (21). The diameter of the reduced diameter section (221) at the end near the spline section (21) is smaller than the diameter of the reduced diameter section (221) at the end away from the spline section (21), and the diameter of the reduced diameter section (221) at the end away from the spline section (21) is equal to the diameter of the mating section (22).

6. A semi-axle locating arrangement according to any one of claims 1 to 4, wherein, The half-shaft (2) also has a bearing mounting section (25) located between the spline section (21) and the mating section (22), and the diameter of the bearing mounting section (25) is greater than the diameter of the spline section (21) and smaller than the diameter of the mating section (22).

7. A semi-axle positioning structure according to any one of claims 1-4, wherein The installation channel (11) also has a variable diameter section (113) located at the end of the positioning section (111) away from the protruding end, the inner diameter of the variable diameter section (113) gradually increasing in the direction away from the positioning section (111).

8. A power system characterized by, Includes a half-shaft positioning structure as described in any one of claims 1-7 and a reducer (3) located at the protruding end, the reducer (3) having a housing (31), a half-shaft gear (32) located inside the housing (31) and an oil seal (33) located inside the housing (31), the spline segment (21) extending into the interior of the housing (31) and spline-connected to the half-shaft gear (32), and the oil seal (33) sleeved on the outside of the half-shaft (2).

9. A power system according to claim 8, wherein, The distance from the end of the positioning section (111) near the half-shaft gear (32) to the end of the half-shaft gear (32) near the oil pan (1) is L1, and the distance from the end of the mating section (22) away from the half-shaft gear (32) to the end of the spline section (21) away from the mating section (22) is L2. L1 and L2 satisfy: L1 < L2.

10. A vehicle characterized by comprising: Includes the half-shaft positioning structure as described in any one of claims 1-7 or the power system as described in any one of claims 8-9.

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