Wheel end planetary reducer for axle and axle
Patent Information
- Application Number
- CN202522024547.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-20
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-09-20
AI Technical Summary
轮边减速器通常为行星减速器机构，其包括壳体、太阳轮、行星轮、行星架，壳体与车桥的轮毂连接，太阳轮有车桥的半轴带动，动力经由半轴传递至太阳轮、再经由太阳轮传递至行星架，从而通过壳体带动轮毂转动，行星轮通过轮轴枢接在行星架上，其端部会与行星架产生摩擦，尤其是在行星轮和太阳轮采用斜齿轮的情况下，由于行星轮会受到来自太阳轮的轴向挤压力，导致行星轮端部与行星架之间的垫片所受的摩擦力较大，长期使用后，垫片对行星支架造成磨损，导致行星轮产生轴向偏移，从而造成行星轮与太阳轮啮合不良，影响轮边减速器其的传动效率及NVH
本实用新型中，通过止转机构对耐磨环与壳体的相对转动进行限定，避免耐磨环随着行星轮转动对壳体造成磨损，耐磨环与行星轮之间设置油润滑槽，对耐磨环与行星轮起到润滑作用，由此，在确保行星轮能够灵活转动的前提下，防止壳体被过度磨损导致行星轮轴向窜动，确保行星轮与太阳轮能够良好的啮合，继而使行星减速器具有较高的传动效率和较好NVH。
Smart Images
Figure CN224726771U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of commercial vehicle technology, specifically to a wheel-side planetary reducer for a vehicle axle and a vehicle axle. Background Technology
[0002] Some commercial vehicles typically have wheel-end reducers installed at the axle ends. These reducers transmit power from the half-shaft to the wheel hub to achieve deceleration and increase torque. Wheel-end reducers are usually planetary reducer mechanisms, including a housing, sun gear, planet gears, and a planet carrier. The housing is connected to the wheel hub of the axle. The sun gear is driven by the axle's half-shaft. Power is transmitted from the half-shaft to the sun gear, and then from the sun gear to the planet carrier, thus driving the wheel hub to rotate through the housing. The planet gears are pivotally connected to the planet carrier via axles, and their ends rub against the planet carrier. Especially when the planet gears and sun gear use helical gears, the planet gears experience axial compressive force from the sun gear, resulting in significant friction on the gaskets between the planet gear ends and the planet carrier. Over time, the gaskets wear down the planet carrier, causing axial misalignment of the planet gears. This leads to poor meshing between the planet gears and the sun gear, affecting the transmission efficiency and NVH (noise, vibration, and harshness) of the wheel-end reducer. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a wheel-side planetary reducer for axles, which can reduce wear on the planet carrier and ensure high transmission efficiency and good NVH between the sun gear and the planet gears.
[0004] The second objective of this utility model is to provide a vehicle axle.
[0005] To achieve the first objective mentioned above, this utility model adopts the following technical solution: The wheel-side planetary reducer of the axle includes a housing, a sun gear, planet gears, and axle; The housing includes an end wall and a mounting wall located inside the end wall. The end wall and the mounting wall are offset along the axial direction of the housing and together form a planet carrier. The sun gear is pivotally connected between the mounting wall and the end wall. The end wall and the mounting wall face each other to form a mounting surface. A shaft hole is provided on both mounting surfaces. The two ends of the axle are respectively inserted into the two shaft holes. The planetary gear is located between the two mounting surfaces, sleeved on the axle and pivotally engaged with the axle. A wear-resistant ring is provided between the two ends of the planetary gear and the two mounting surfaces. The wear-resistant ring includes a first side facing the mounting surface and a second side facing the end face of the planetary gear. An anti-rotation mechanism is provided between the first side and the mounting surface to limit the degree of freedom of relative rotation between the wear-resistant ring and the mounting surface. A lubricating oil groove is formed between the second side and the end face of the planetary gear.
[0006] The anti-rotation mechanism includes a limiting groove disposed on the mounting surface and located on the outer periphery of the shaft hole, and a protruding boss disposed on the first side of the wear-resistant ring and embedded in the limiting groove.
[0007] The limiting groove extends from the periphery of the shaft hole toward the central axis away from the shaft hole.
[0008] Multiple connecting posts connect the mounting wall and the end wall. The mounting wall, connecting posts, and end wall are integrally formed. An installation space is formed between two adjacent connecting posts. A planetary gear is installed in each installation space. An installation hole is opened in the middle of the end wall. A stop ring is detachably fixed inside the installation hole. The sun gear is clamped between the stop ring and the mounting wall. The inner diameter of the installation hole is larger than the maximum outer diameter of the sun gear and the maximum outer diameter of the planetary gear, so that the sun gear and planetary gear can pass through the installation hole from the outside of the end wall and enter the inside of the end wall.
[0009] The shaft hole provided on the end wall extends from the mounting surface on the end wall to the outer side of the end wall, so that the axle can pass through the shaft hole on the end wall via the outside of the end wall.
[0010] A cover plate is fixed to the outer side of the end wall by bolts, and the cover plate covers the outer end of the wheel axle.
[0011] The second side of the wear ring is provided with a groove surrounding the wear ring, and the lubricating oil groove is formed by the end face of the planetary gear and the groove.
[0012] Two sets of rollers are provided between the planetary gear and the axle. The two sets of rollers are arranged along the axial direction of the planetary gear. A spacer is provided between the two sets of rollers and between the two sets of rollers and the two wear rings.
[0013] To achieve the second objective mentioned above, this utility model adopts the following technical solution: Axle, including the wheel-side planetary reducer of the aforementioned axle.
[0014] The beneficial effects of this utility model are as follows: In this invention, the relative rotation between the wear-resistant ring and the housing is limited by an anti-rotation mechanism to prevent the wear-resistant ring from causing wear on the housing as the planetary gears rotate. An oil lubrication groove is provided between the wear-resistant ring and the planetary gears to lubricate them. Thus, while ensuring that the planetary gears can rotate flexibly, the housing is prevented from being excessively worn, which could lead to axial movement of the planetary gears. This ensures that the planetary gears and the sun gear can mesh well, thereby enabling the planetary reducer to have high transmission efficiency and good NVH. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 Enlarged view at point A in the middle; Figure 4 for Figure 1 Schematic diagram of the middle shell structure; Figure 5 for Figure 1 A schematic diagram of the wear-resistant ring structure. Detailed Implementation
[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1 , 2 As shown in Figures 3 and 4, this utility model discloses a wheel-side planetary reducer for an axle, comprising a housing 10, a sun gear 20, planet gears 30, and an axle 40. The housing 10 includes an end wall 11 and a mounting wall 12. A flange for connecting to the wheel hub of the axle is provided on the inner end of the housing 10. The end wall 11 is located on the outer end of the housing 10. The mounting wall 12 is located inside the housing 10 and inside the end wall 11. The mounting wall 12 and the end wall 11 are offset by a certain distance along the circumference of the housing 10. The mounting wall 12 and the end wall 11 together form a planet carrier. The sun gear 20 is pivotally connected between the mounting wall 12 and the end wall 11, and the sun gear 20 is located at the middle position of the radial direction of the housing, so as to facilitate the connection of the sun gear 20 to the half-shaft of the axle. The end wall 11 has a mounting surface 111 facing the mounting wall 12, and the mounting wall 12 has a mounting surface 121 facing the end wall 11. The mounting surfaces 111 and 121 are arranged opposite to each other. The mounting surface 111 has a shaft hole 112, and the mounting surface 121 has a shaft hole 122. The shaft holes 112 and 122 are directly opposite each other. The two ends of the axle 40 are respectively inserted into the shaft holes 112 and 122. The axle 40 is tightly fitted with the shaft holes 112 and 122 to fix the axle 40 to the housing 10. The planetary gear 30 is located between the mounting surfaces 111 and 121, and is sleeved on the axle 40 and pivotally engaged with the axle 40. The two ends of the planetary gear 30 are between the mounting surfaces 111 and 121. A wear-resistant ring 50 is provided, which includes a first side 51 facing the mounting surface and a second side 52 facing the end face of the planetary gear 30. Taking the wear-resistant ring 50 located between the planetary gear 30 and the end wall 11 as an example, an anti-rotation mechanism is provided between the first side 51 of the wear-resistant ring 50 and the mounting surface 111. The anti-rotation mechanism prevents the wear-resistant ring 50 from rotating relative to the mounting surface 111, thereby keeping the wear-resistant ring 50 relatively fixed to the housing 10. The second side 52 and the end face of the planetary gear 30 form an oil lubrication groove. The second side 52 can rotate relative to the planetary gear 30. The lubricating oil in the oil lubrication groove between the second side 52 and the end face of the planetary gear 30 lubricates the second side 52 and the planetary gear 30.
[0017] In this invention, the relative rotation between the wear-resistant ring 50 and the housing 10 is limited by an anti-rotation mechanism, preventing the wear-resistant ring 50 from causing wear to the housing as the planetary gear 30 rotates. An oil lubrication groove is provided between the wear-resistant ring 50 and the planetary gear 30 to lubricate them. Thus, while ensuring that the planetary gear 30 can rotate flexibly, the housing 10 is prevented from being excessively worn, which could cause the planetary gear 30 to move axially. This ensures that the planetary gear 30 and the sun gear 20 can mesh well, thereby enabling the planetary reducer to have high transmission efficiency and good NVH.
[0018] In this invention, taking the wear-resistant ring 50 located between the planetary gear 30 and the end wall 11 as an example, the anti-rotation mechanism between the wear-resistant ring 50 and the end wall 11 includes a limiting groove 113 disposed on the mounting surface 111 and located on the outer periphery of the shaft hole 112, and a protruding boss 53 disposed on the first side surface 51 of the wear-resistant ring 50. The boss 53 is embedded in the limiting groove 113 to prevent the wear-resistant ring 50 from rotating relative to the end wall 11. The anti-rotation mechanism disposed between another wear-resistant ring 50 and the mounting wall 12 is the same as described above and will not be repeated here. In other embodiments of this invention, the boss may be disposed on the end wall 11, and the corresponding limiting groove 113 may be formed on the first side surface 51 of the wear-resistant ring 50.
[0019] The aforementioned limiting groove 113 extends from the periphery of the shaft hole 112 toward the central axis away from the shaft hole 112. Similarly, the limiting groove 123 extends from the periphery of the shaft hole 122 toward the central axis away from the shaft hole 122. When assembling the planetary gear 30, two wear-resistant rings 50 are placed at both ends of the planetary gear 30. The bosses 53 on the two wear-resistant rings 50 can slide through the limiting groove, so that the central axis of the planetary gear 30 can be aligned with the central axis of the shaft hole, thereby facilitating the assembly of the planetary gear 30 and the wear-resistant rings 50 into the housing 10.
[0020] Multiple connecting posts connect the mounting wall 12 and the end wall 11. The mounting wall 12, connecting posts, and end wall 11 are integrally formed, and an installation space is formed between two adjacent connecting posts. A planetary gear 30 is installed in each installation space. A mounting hole 13 is provided in the middle of the end wall 11. A stop ring 60 is detachably fixed inside the mounting hole 13. The sun gear 20 is clamped between the stop ring 60 and the mounting wall 12. The diameter of the mounting hole 13 is set to be greater than the maximum outer diameter of the sun gear 20 and the maximum outer diameter of the planetary gear 30, so that the sun gear 20 and the planetary gear 30 can pass through the mounting hole 13 from the outside of the terminal 11 into the housing 10, thereby facilitating the installation of the planetary gear 30 and the sun gear 20 between the end wall 11 and the mounting wall 12.
[0021] The shaft hole 112 provided on the end wall 11 extends from the mounting surface 111 of the end wall 11 to the outer side of the end wall 11, so that the axle 40 can pass through the shaft hole 112 on the end wall 11 through the outer side of the end wall 11 and then enter the shaft hole 122 on the mounting wall 12. During assembly, the planetary gear 30 is inserted through the mounting hole 13 and placed between the end wall 11 and the mounting wall 12. The bosses 53 on the two wear rings 50 slide along the limiting grooves 113 and 123, so that the planetary gear 30 is coaxially arranged with the two shaft holes. The axle 40 is inserted through the outer side of the end wall 11, thereby pivoting the planetary gear to the housing 10 through the axle 40.
[0022] A cover plate 70 is fixedly connected to the outer side of the end wall 11 by bolts. The cover plate 70 is used to cover the outer end of the axle 40 to prevent dust from entering the gap between the axle 40 and the end wall 11.
[0023] The second side 52 of the wear ring 50 is provided with a groove 54 surrounding the wear ring 50. The second side 52 of the wear ring 50 is placed against the end face of the planetary gear 30, and the end face of the planetary gear 30 and the groove 54 together form a lubricating oil groove.
[0024] Two sets of rollers 31 are provided between the planetary gear 30 and the axle 40. The two sets of rollers 31 are arranged along the axial direction of the planetary gear 30. A spacer 32 is provided between the two sets of rollers 31 and between the two sets of rollers 31 and the two wear rings 50. The two sets of rollers 31 enable the planetary gear 30 to rotate more flexibly relative to the axle 40.
[0025] The axle of this utility model includes the wheel-side planetary reducer of the axle described above. The other structures of the axle are the same as those in the prior art and will not be described in detail here.
[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A wheel-side planetary reducer for an axle, characterized in that, Includes the housing, sun gear, planetary gears, and axle; The housing includes an end wall and a mounting wall located inside the end wall. The end wall and the mounting wall are offset along the axial direction of the housing and together form a planet carrier. The sun gear is pivotally connected between the mounting wall and the end wall. The end wall and the mounting wall face each other to form a mounting surface. A shaft hole is provided on both mounting surfaces. The two ends of the axle are respectively inserted into the two shaft holes. The planetary gear is located between the two mounting surfaces, sleeved on the axle and pivotally engaged with the axle. A wear-resistant ring is provided between the two ends of the planetary gear and the two mounting surfaces. The wear-resistant ring includes a first side facing the mounting surface and a second side facing the end face of the planetary gear. An anti-rotation mechanism is provided between the first side and the mounting surface to limit the degree of freedom of relative rotation between the wear-resistant ring and the mounting surface. A lubricating oil groove is formed between the second side and the end face of the planetary gear.
2. The wheel-side planetary reducer of the axle as described in claim 1, characterized in that, The anti-rotation mechanism includes a limiting groove disposed on the mounting surface and located on the outer periphery of the shaft hole, and a protruding boss disposed on the first side of the wear-resistant ring and embedded in the limiting groove.
3. The wheel-side planetary reducer of the axle as described in claim 1, characterized in that, The limiting groove extends from the periphery of the shaft hole toward the central axis away from the shaft hole.
4. The wheel-side planetary reducer of the axle as described in claim 3, characterized in that, Multiple connecting posts connect the mounting wall and the end wall. The mounting wall, connecting posts, and end wall are integrally formed. An installation space is formed between two adjacent connecting posts. A planetary gear is installed in each installation space. An installation hole is opened in the middle of the end wall. A stop ring is detachably fixed inside the installation hole. The sun gear is clamped between the stop ring and the mounting wall. The inner diameter of the installation hole is larger than the maximum outer diameter of the sun gear and the maximum outer diameter of the planetary gear, so that the sun gear and planetary gear can pass through the installation hole from the outside of the end wall and enter the inside of the end wall.
5. The wheel-side planetary reducer of the axle as described in claim 1, characterized in that, The shaft hole provided on the end wall extends from the mounting surface on the end wall to the outer side of the end wall, so that the axle can pass through the shaft hole on the end wall via the outside of the end wall.
6. The wheel-side planetary reducer of the axle as described in claim 5, characterized in that, A cover plate is fixed to the outer side of the end wall by bolts, and the cover plate covers the outer end of the wheel axle.
7. The wheel-side planetary reducer of the axle as described in claim 1, characterized in that, The second side of the wear ring is provided with a groove surrounding the wear ring, and the lubricating oil groove is formed by the end face of the planetary gear and the groove.
8. The wheel-side planetary reducer of the axle as described in claim 1, characterized in that, Two sets of rollers are provided between the planetary gear and the axle. The two sets of rollers are arranged along the axial direction of the planetary gear. A spacer is provided between the two sets of rollers and between the two sets of rollers and the two wear rings.
9. An axle, characterized in that, The wheel-side planetary reducer of the axle as described in any one of claims 1-8.