A split half-axle for a coaxial electric drive axle
By designing split half-axis, using meshing connections to reduce the half-axis length requirements, the problem of insufficient machining difficulty and strength of the integral half-axis in the prior art is solved, and higher strength and wider application adaptability are achieved.
Patent Information
- Application Number
- CN202421444370.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-24
AI Technical Summary
After the length of the existing coaxial electric drive axle, the machining difficulty increases, resulting in insufficient strength and fracture at the spline connection, making it difficult to meet the application needs of customers for large wheel end installation.
A split half shaft is designed, including a differential end output half shaft and a wheel end output half shaft. Through the meshing connection of the second outer spline and the first inner spline, the length requirements of each part are reduced, the processing difficulty is reduced, and more customer needs are matched through different wheel end output half shaft types.
Through the split design, the length requirements of the half-axis are reduced, the processing difficulty is reduced, the strength of the half-axis is improved, and more customers' wheel end half-axis needs are matched, avoiding the risk of direct collision of different types of half-axis end faces.
Smart Images
Figure CN222713247U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wheel end half shafts, in particular to a split half shaft used for a coaxial electric drive axle. Background Art
[0002] The existing fully floating or semi-floating coaxial electric drive axles use an integral wheel-end output half-axle on each side. As the wheel-end installation distance continues to increase in application scenarios, such as RVs, box trucks, large off-road pickups, etc., the wheel-end half-axle size is also getting longer and longer.
[0003] However, as the length of the integrated output half-shaft increases, the half-shaft encounters various difficulties from forging to heat treatment and machining, especially the spline processing after the length is increased. This leads to insufficient strength of the final half-shaft product, fracture at the spline connection and other reduced performance. Utility Model Content
[0004] The main technical problem solved by the utility model is to provide a split half-axle for a coaxial electric drive axle, which can improve the processing difficulty of the output half-axle of the coaxial electric drive axle, improve the strength of the half-axle, and meet the application needs of more customers for large wheel end installation.
[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a split half-shaft for a coaxial electric drive axle, including: a differential end output half-shaft and a wheel end output half-shaft, the end of the differential end output half-shaft connected to the differential is provided with a first external spline that matches the differential, the other end of the differential end output half-shaft is provided with a connecting groove, the inner wall of the connecting groove is provided with a first internal spline, one end of the wheel end output half-shaft is provided with a second external spline, the second external spline is meshed with the first internal spline, the other end of the wheel end output half-shaft is connected to the wheel, and a bearing is provided on the end of the differential end output half-shaft away from the first external spline, and an oil seal is provided on one side of the bearing.
[0006] Preferably, a first mounting annular surface is provided at one end of the differential end output half shaft away from the external spline, the bearing is mounted on the first mounting annular surface, and a lubrication groove is provided on the side surface of the first mounting annular surface for storing lubricating oil.
[0007] Preferably, a second mounting annular surface is provided on one side of the first mounting annular surface, and the oil seal is mounted on the second mounting annular surface.
[0008] Preferably, a step annular surface is provided between the first mounting annular surface and the second mounting annular surface, and one side of the bearing inner ring abuts against one side of the step annular surface.
[0009] Preferably, an avoidance cavity is extended circumferentially at the bottom of the connecting groove.
[0010] Preferably, a retaining spring is provided on both sides of the bearing.
[0011] The beneficial effects of the utility model are:
[0012] 1. By designing the original integral wheel-end output half shaft to consist of a differential output half shaft and a wheel-end output half shaft, the length requirements of both the differential output half shaft and the wheel-end output half shaft are reduced, thereby reducing the processing difficulty, improving the strength of the half shaft, and by replacing different types of wheel-end output half shafts, it can match the wheel-end half shafts of more customers;
[0013] 2. By providing an avoidance cavity in the connection groove of the differential output half-shaft, the processing of the first external spline is facilitated while avoiding direct collision between the end faces of different types of wheel end half-shafts and the end faces of the differential end output half-shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model when the whole is assembled with the differential;
[0015] Figure 2 It is an exploded schematic diagram of the utility model;
[0016] Figure 3 It is a partial sectional view of the utility model.
[0017] The markings of the components in the accompanying drawings are as follows:
[0018] 1. differential end output half shaft; 11. first external spline; 12. connecting groove; 121. first internal spline;
[0019] 122. Avoidance cavity; 13. Bearing; 14. Oil seal; 15. First mounting annular surface; 16. Lubrication groove; 17. Second mounting annular surface; 18. Step annular surface; 2. Wheel-end output half shaft; 21. Second external spline. DETAILED DESCRIPTION
[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0026] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0027] Example:
[0028] refer to Figure 1-Figure 3 A split half shaft for a coaxial electric drive axle comprises: a differential end output half shaft 1 and a wheel end output half shaft 2, wherein one end of the differential end output half shaft 1 connected to the differential is provided with a first external spline 11 matched with the differential, and the other end of the differential end output half shaft 1 is provided with a connecting groove 12, and the inner wall of the connecting groove 12 is provided with a first internal spline 121, and one end of the wheel end output half shaft 2 is provided with a second external spline 21, and the second external spline 21 is meshed with the first internal spline 121, and the other end of the wheel end output half shaft 2 is connected to the wheel, so that the wheel end output half shaft 2 and the differential end output half shaft 1 are connected through the second external spline 21 and the first internal spline 121, and then the differential drives the differential end output half shaft 1 to rotate, the differential end output half shaft 1 drives the wheel end output half shaft 2 to rotate, and the wheel end output half shaft 2 drives the wheel to rotate. This greatly reduces the length requirements for the differential end output half shaft 1 and the wheel end output half shaft 2, thereby reducing the difficulty of processing the differential end output half shaft 1 and the wheel end output half shaft 2. At the same time, different types of wheel end output half shafts 2 can be connected through the differential end output half shaft 1, which can meet more customer needs. A bearing 13 is installed on the end of the differential end output half shaft 1 away from the first external spline 11, and retaining springs are installed on both sides of the bearing 13. An oil seal 14 is arranged on one side of the bearing 13.
[0029] refer to Figure 1-Figure 3 An avoidance cavity 122 is extended circumferentially at the bottom of the connecting groove 12. By opening the avoidance cavity 122, on the one hand, it is convenient to process the first internal spline 121. On the other hand, in order to adapt to the wheel-end output half-shaft 2 of different customers, the end face of the wheel-end output half-shaft 2 can be prevented from colliding with the end face of the differential-end output half-shaft 1.
[0030] refer to Figure 1-Figure 3A first mounting annular surface 15 is provided at one end of the differential end output half shaft 1 away from the external spline, and the bearing 13 is mounted on the first mounting annular surface 15. A lubrication groove 16 is provided on the side of the first mounting annular surface 15. The lubrication groove 16 is used to store lubricating oil, so as to better provide lubrication for the bearing 13 and improve the service life of the bearing 13. In addition, the lubrication groove 16 can also reduce the weight of the differential end output half shaft 1.
[0031] refer to Figure 1-Figure 3 A second mounting annular surface 17 is arranged on a side of the first mounting annular surface 15 away from the first external spline 11 , and the oil seal 14 is mounted on the second mounting annular surface 17 .
[0032] refer to Figure 1-Figure 3 A step ring surface 18 is provided between the first mounting ring surface 15 and the second mounting ring surface 17, and one side of the inner ring of the bearing 13 abuts against one side of the step ring surface 18, thereby further stabilizing the position of the bearing 13. Lubricating oil can also be stored at the step ring surface 18, further providing lubrication for the bearing 13 and extending the life of the bearing 13.
[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A split half-axle for a coaxial electric drive axle, characterized in that: include: A differential end output half shaft (1) and a wheel end output half shaft (2), wherein one end of the differential end output half shaft (1) connected to the differential is provided with a first external spline (11) matched with the differential, the other end of the differential end output half shaft (1) is provided with a connecting groove (12), the inner wall of the connecting groove (12) is provided with a first internal spline (121), one end of the wheel end output half shaft (2) is provided with a second external spline (21), the second external spline (21) is meshed with the first internal spline (121), the other end of the wheel end output half shaft (2) is connected to the wheel, and a bearing (13) is provided on the end of the differential end output half shaft (1) away from the first external spline (11), and an oil seal (14) is provided on one side of the bearing (13).
2. A split half-axle for a coaxial electric drive axle according to claim 1, characterized in that: A first mounting annular surface (15) is provided at one end of the differential end output half shaft (1) away from the external spline, the bearing (13) is mounted on the first mounting annular surface (15), and a lubrication groove (16) is provided on the side surface of the first mounting annular surface (15), and the lubrication groove (16) is used to store lubricating oil.
3. A split half-axle for a coaxial electric drive axle according to claim 2, characterized in that: A second mounting annular surface (17) is provided on one side of the first mounting annular surface (15), and the oil seal (14) is mounted on the second mounting annular surface (17).
4. The split half-axle for a coaxial electric drive axle according to claim 3, characterized in that: A step annular surface (18) is provided between the first mounting annular surface (15) and the second mounting annular surface (17), and one side of the inner ring of the bearing (13) abuts against one side of the step annular surface (18).
5. The split half-axle for a coaxial electric drive axle according to claim 1, characterized in that: An avoidance cavity (122) is extended circumferentially at the bottom of the connection groove (12).
6. The split half-axle for a coaxial electric drive axle according to claim 1, characterized in that: Circlips are respectively arranged on both sides of the bearing (13).