Differential assembly and electric vehicle comprising same
By using a split left and right half-shell structure with the support bearing arranged on the inner side of the end, the problem of excessive axial dimension of existing differential assemblies is solved, achieving compactness of the differential assembly and space optimization for electric vehicles.
Patent Information
- Application Number
- CN202520879148.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-05-06
AI Technical Summary
The existing differential assembly has an excessively large axial dimension, resulting in low axial space utilization and hindering the compact design of the vehicle.
It adopts a split left and right half-shell structure, with the support bearings located on the inner side of the ends of the left and right half-shells. Combined with threaded or clamp connections, the arrangement of the support bearings is optimized, reducing the axial space dimension.
It improves the space utilization of the differential assembly, reduces the axial space dimension, realizes the compact design of electric vehicles, and saves space in the vehicle chassis layout.
Smart Images
Figure CN223868482U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of new energy vehicle technology, specifically to a differential assembly and an electric vehicle containing the same. Background Technology
[0002] With the technological development of new energy electric drive assemblies, current new energy electric drive assemblies are pursuing compactness and efficiency in assembly space, minimizing the product envelope and reducing the axial space of the differential assembly while meeting the requirements, so as to facilitate vehicle integration.
[0003] Existing differential assemblies mostly use a one-piece differential housing, with bearing mounting positions located at both ends of the differential housing. The bearing positions protrude as a whole, resulting in low utilization of axial space and hindering axial space compression. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing differential assembly with excessive axial dimension, and to provide a differential assembly with compact structure, convenient disassembly and assembly and high axial space utilization, as well as an electric vehicle containing the same.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A differential assembly includes: a left half-shell, a right half-shell, a half-shaft gear, a planetary gear, a support bearing, and a planetary pin. The left half-shell and the right half-shell are detachably connected, and the inner sides of the left half-shell and the right half-shell form a mounting cavity. The planetary pin is radially mounted in the mounting cavity, and the planetary gear is engaged with the planetary pin. The half-shaft gear is axially mounted in the mounting cavity, and the half-shaft gear meshes with the planetary gear for transmission. The outer ends of the left half-shell and the right half-shell are each provided with embedded bearing seats, and the support bearing is press-fitted into the bearing seats to achieve the support bearing being located on the inner side of the ends of the left and right half-shells.
[0007] As a further improvement of this utility model, multiple threaded holes are evenly distributed on the left and right half shells respectively, and bolts are screwed into the threaded holes to realize the detachable installation of the left and right half shells.
[0008] As a further improvement of this utility model, at the ends of the left and right half-shells, the position of the threaded hole is lower than the position of the bearing seat.
[0009] As a further improvement of this utility model, the left half shell and the right half shell are connected by threads.
[0010] As a further improvement of this utility model, the left half shell and the right half shell are connected by a clamp.
[0011] As a further improvement of this utility model, the end of the planetary pin is provided with an axial mounting hole, and the sides of the left half shell and the right half shell are provided with through holes. A positioning pin is installed in the through hole and the axial mounting hole to realize the installation of the planetary pin.
[0012] As a further improvement of this utility model, a half-shaft gear washer is provided between the inner walls of the left and right half-shells and the half-shaft gear.
[0013] As a further improvement of this utility model, planetary gear shims are provided between the inner walls of the left and right half shells and the planetary gears.
[0014] As a further improvement of this utility model, the supporting bearing is a deep groove ball bearing, a tapered bearing, an angular contact bearing, or a cylindrical bearing.
[0015] As a general technical concept, it includes the aforementioned differential assembly.
[0016] Compared with the prior art, the advantages of this utility model are:
[0017] The differential assembly and electric vehicle containing the present invention, by setting embedded bearing positions at the outer ends of both the left and right half-shells, press-fits the support bearings into the bearing positions, thereby realizing that the support bearings are located on the inner sides of the ends of the left and right half-shells. By optimizing the arrangement of the support bearings, the overall space utilization of the differential assembly is improved, and the axial space dimension of the differential assembly is effectively reduced. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the exploded structure principle of the differential assembly in a specific embodiment of this utility model;
[0019] Figure 2 This is a schematic cross-sectional view of the differential assembly in a specific embodiment of the present invention.
[0020] Figure 3 This is a cross-sectional structural schematic diagram of the differential assembly from another perspective in a specific embodiment of the present utility model;
[0021] Figure 4 This is a cross-sectional structural schematic diagram (with bearings) of the differential assembly in a specific embodiment of this utility model;
[0022] Legend: 1. Left half shell; 2. Right half shell; 3. Half shaft gear washer; 4. Half shaft gear; 5. Planetary gear washer; 6. Planetary gear; 7. Bolt; 8. Locating pin; 9. Bearing seat; 10. Support bearing; 11. Planetary pin; 12. Axial mounting hole; 13. Through hole; 14. Threaded hole. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.
[0024] In the description of this utility model, it should be understood that the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0026] Example
[0027] like Figure 1 , Figure 3 and Figure 4 As shown, the differential assembly of this utility model includes: a left half-shell 1, a right half-shell 2, a half-shaft gear 4, a planetary gear 6, a support bearing 10, and a planetary pin 11. The left half-shell 1 and the right half-shell 2 are detachably connected, and the inner sides of the left half-shell 1 and the right half-shell 2 form a mounting cavity. The planetary pin 11 is installed radially in the mounting cavity, the planetary gear 6 is connected to the planetary pin 11, and the half-shaft gear 4 is installed axially in the mounting cavity, meshing with the planetary gear 6 for transmission. The outer ends of both the left half-shell 1 and the right half-shell 2 are provided with embedded bearing seats 9, and the support bearing 10 is press-fitted into the bearing seats 9, so that the support bearing 10 is located on the inner side of the ends of the left half-shell 1 and the right half-shell 2.
[0028] In this embodiment, the differential housing is composed of a detachable split left half-shell 1 and a right half-shell 2, which has a simple structure and is easy to assemble and disassemble, ensuring the assemblability of the planetary gear 6 and the half-shaft gear 4 inside the differential. By setting embedded bearing seats 9 at the outer ends of both the left half-shell 1 and the right half-shell 2, the support bearing 10 is press-fitted into the bearing seats 9, thus realizing that the support bearing 10 is located on the inner side of the ends of the left half-shell 1 and the right half-shell 2. By optimizing the arrangement of the support bearing 10, the overall space utilization of the differential assembly is improved, and the axial space dimension of the differential assembly is effectively reduced.
[0029] like Figure 3 As shown, multiple threaded holes 14 are evenly distributed on the left half-shell 1 and the right half-shell 2, and bolts 7 are screwed into the threaded holes 14 to enable the left half-shell 1 and the right half-shell 2 to be detachably installed. Furthermore, at the ends of the left half-shell 1 and the right half-shell 2, the position of the threaded holes 14 is lower than the position of the bearing seat 9 to avoid positional interference between the bolts 7 and the supporting bearing 10.
[0030] In other embodiments, the left half-shell 1 and the right half-shell 2 are directly connected by threads, or by clamps, or by rivets. Alternatively, the large output shaft gear can be directly integrated with either the left half-shell 1 or the right half-shell 2.
[0031] like Figure 1 and Figure 2 As shown, the end of the planetary pin 11 is provided with an axial mounting hole 12, and the sides of the left half shell 1 and the right half shell 2 are provided with through holes 13. A positioning pin 8 is installed in the through hole 13 and the axial mounting hole 12 to realize the installation of the planetary pin 11.
[0032] like Figure 1 and Figure 2 As shown, half-shaft gear shims 3 are provided between the inner walls of the left half-shell 1 and the right half-shell 2 and the half-shaft gear 4, and planetary gear shims 5 are provided between the inner walls of the left half-shell 1 and the right half-shell 2 and the planetary gear 6. The shims ensure the correct position of the gears within the housing, preventing axial displacement. The shims also act as a buffer layer, reducing direct contact and friction between the gears and the inner walls of the housing. Furthermore, by selecting shims of different thicknesses, the clearance between the gears and the housing can be precisely adjusted, reducing transmission problems caused by excessive or insufficient clearance. It is understood that the installation method of the half-shaft gear 4 and the planetary gear 6 within the differential housing can adopt conventional settings in the art, and will not be elaborated further here.
[0033] In this embodiment, the support bearing 10 is a deep groove ball bearing, which has the characteristics of high load-bearing capacity, good high-speed performance, and strong adaptability. In other embodiments, the support bearing 10 may also be a tapered bearing, an angular contact bearing, or a cylindrical bearing.
[0034] In this embodiment, an electric vehicle is also provided, including the aforementioned differential assembly, which can save space in the vehicle chassis, contribute to the lightweight and compact design of the vehicle, and free up more space for battery packs, other transmission components or electronic devices.
[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A differential assembly, characterized in that, include: The left half-shell (1), right half-shell (2), half-shaft gear (4), planetary gear (6), support bearing (10) and planetary pin (11) are detachably connected. The inner side of the left half-shell (1) and the inner side of the right half-shell (2) form an installation cavity. The planetary pin (11) is installed radially in the installation cavity. The planetary gear (6) is connected to the planetary pin (11). The half-shaft gear (4) is installed axially in the installation cavity. The half-shaft gear (4) meshes with the planetary gear (6). The outer ends of the left half-shell (1) and the outer ends of the right half-shell (2) are provided with embedded bearing positions (9). The support bearing (10) is press-fitted into the bearing positions (9) so that the support bearing (10) is located on the inner side of the ends of the left half-shell (1) and the right half-shell (2).
2. The differential assembly according to claim 1, characterized in that, Multiple threaded holes (14) are evenly distributed on the left half shell (1) and the right half shell (2), and bolts (7) are screwed into the threaded holes (14) to enable the left half shell (1) and the right half shell (2) to be detachably installed.
3. The differential assembly according to claim 2, characterized in that, At the ends of the left half-shell (1) and the right half-shell (2), the position of the threaded hole (14) is lower than the position of the bearing seat (9).
4. The differential assembly according to claim 1, characterized in that, The left half shell (1) and the right half shell (2) are connected by threads.
5. The differential assembly according to claim 1, characterized in that, The left half shell (1) and the right half shell (2) are connected by clamps.
6. The differential assembly according to any one of claims 1 to 5, characterized in that, The end of the planetary pin (11) is provided with an axial mounting hole (12), and the sides of the left half shell (1) and the right half shell (2) are provided with through holes (13). A positioning pin (8) is installed in the through hole (13) and the axial mounting hole (12) to realize the installation of the planetary pin (11).
7. The differential assembly according to any one of claims 1 to 5, characterized in that, Half-shaft gear shims (3) are provided between the inner walls of the left half-shell (1) and the right half-shell (2) and the half-shaft gear (4).
8. The differential assembly according to any one of claims 1 to 5, characterized in that, Planetary gear shims (5) are provided between the inner walls of the left half shell (1) and the right half shell (2) and the planetary gear (6).
9. The differential assembly according to any one of claims 1 to 5, characterized in that, The support bearing (10) is a deep groove ball bearing, tapered bearing, angular contact bearing, or cylindrical bearing.
10. An electric vehicle, characterized in that, Includes the differential assembly as described in any one of claims 1 to 9.