Planetary gear set, planetary gear assembly, and vehicle

Abstract

The utility model provides a kind of planet row gear ring, planet row assembly and vehicle, the planet row gear ring includes: tooth barrel, the inner side wall of tooth barrel is provided with inner tooth and inner spline, inner tooth and inner spline are arranged at interval in the axial direction of tooth barrel, and outer spline is provided on the outer side wall of tooth barrel;Tooth cover, it is sleeved on the outer side wall of tooth barrel and is fixedly connected with tooth barrel, the length of tooth barrel is greater than the length of tooth cover, and the outer side wall of tooth cover is provided with outer tooth, and tooth cover and outer spline are arranged at interval in the axial direction of tooth barrel.Through the technical scheme provided in the present application, the problem that the coaxiality of inner gear ring and outer gear ring is difficult to guarantee during assembly in related technology can be solved, thereby affecting the assembly accuracy.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and more specifically, to a planetary gear ring, a planetary gear assembly, and a vehicle. Background Technology

[0002] Planetary gear sets are widely used in automotive powertrain systems due to their ability to achieve different speed ratios through clutch switching, and their advantages such as high gear strength, compact structure, and small axial space. Specifically, planetary gear sets can achieve multiple speed ratio conversions by cleverly switching between different clutches and brakes, thereby meeting the needs of automobiles under different driving conditions.

[0003] In related technologies, planetary gear sets mainly consist of three parts: the planet carrier, the planetary gear ring, and the sun gear. These three components work together to achieve efficient power transmission and conversion. Specifically, the gear ring includes an internal gear ring and an external gear ring; however, the coaxiality of the internal and external gear rings is difficult to guarantee during assembly, thus affecting assembly accuracy. Utility Model Content

[0004] This invention provides a planetary gear ring, a planetary gear assembly, and a vehicle to solve the problem in related technologies where the coaxiality of the internal and external gear rings is difficult to guarantee during assembly, thus affecting assembly accuracy.

[0005] According to one aspect of the present invention, a planetary gear ring is provided, comprising: a gear cylinder, the inner sidewall of which is provided with internal teeth and internal splines, the internal teeth and internal splines being spaced apart in the axial direction of the gear cylinder, and an external spline being provided on the outer sidewall of the gear cylinder; and a gear sleeve, which is sleeved on the outer sidewall of the gear cylinder and fixedly connected to the gear cylinder, the length of the gear cylinder being greater than the length of the gear sleeve, the outer sidewall of the gear sleeve being provided with external teeth, and the gear sleeve and external splines being spaced apart in the axial direction of the gear cylinder.

[0006] Furthermore, the gear cylinder and gear sleeve are welded together.

[0007] Furthermore, along the axial direction of the gear sleeve, both sides of the gear sleeve are welded to the gear cylinder.

[0008] Furthermore, the planetary gear ring also includes a first bearing, which is disposed inside the gear cylinder, and the outer ring of the first bearing is connected to the inner wall of the gear cylinder.

[0009] Furthermore, the planetary gear ring also includes a second bearing, which is sleeved on the outer wall of the gear cylinder, and the inner ring of the second bearing is connected to the outer wall of the gear cylinder.

[0010] Furthermore, the first bearing is located at the first end of the gear cylinder, the second bearing is located at the second end of the gear cylinder, and the distance between the gear sleeve and the first bearing is greater than the distance between the gear sleeve and the second bearing.

[0011] Furthermore, the material of the gear cylinder is different from that of the gear sleeve.

[0012] Furthermore, the gear cylinder is a medium carbon steel gear cylinder; and / or, the gear sleeve is a low carbon steel gear sleeve.

[0013] According to another aspect of the present invention, a planetary gear set assembly is provided, which includes a planet carrier, a sun gear, and a planetary gear ring, wherein the planetary gear ring is the planetary gear ring provided above.

[0014] According to another aspect of the present invention, a vehicle is provided, the vehicle including a planetary gear set assembly, the planetary gear set assembly being the one provided above.

[0015] By applying the technical solution of this utility model, the inner wall of the gear cylinder is directly provided with internal teeth and internal splines, and the outer wall of the gear cylinder is provided with external splines. The gear sleeve is fitted onto the outer wall of the gear cylinder and fixedly connected to the gear cylinder, and the outer wall of the gear sleeve is provided with external teeth. This design integrates the internal gear ring and the external gear ring in the traditional split structure into a single structure, ensuring coaxiality and thus improving assembly accuracy. Furthermore, since the internal teeth, internal splines, and external splines are manufactured on the same base (gear cylinder), they can maintain extremely high coaxiality during processing. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 An exploded view of the planetary gear ring provided in an embodiment of the present invention is shown;

[0018] Figure 2 A cross-sectional view of the planetary gear ring provided in an embodiment of the present invention is shown;

[0019] Figure 3 It shows Figure 2 A magnified view of a section at point A in the middle;

[0020] Figure 4 An exploded view of the planetary assembly provided in an embodiment of the present invention is shown.

[0021] The above figures include the following reference numerals:

[0022] 10. Gear cylinder; 11. Internal gear; 12. Internal spline; 13. External spline;

[0023] 20. Gear sleeve; 21. External gear; 22. First welding point; 23. Second welding point;

[0024] 30. First bearing;

[0025] 40. Second bearing;

[0026] 50. Planetary support;

[0027] 60. Sun Gear;

[0028] 70. Planetary gear ring;

[0029] 80. Clutch;

[0030] 90. Brake. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] like Figures 1 to 3 As shown, this embodiment of the present invention provides a planetary gear ring, which includes a gear cylinder 10 and a gear sleeve 20. The inner wall of the gear cylinder 10 is provided with internal teeth 11 and internal splines 12, which are spaced apart axially on the gear cylinder 10. The outer wall of the gear cylinder 10 is provided with external splines 13. The gear sleeve 20 is fitted onto the outer wall of the gear cylinder 10 and fixedly connected to the gear cylinder 10. The length of the gear cylinder 10 is greater than the length of the gear sleeve 20. The outer wall of the gear sleeve 20 is provided with external teeth 21, and the gear sleeve 20 and the external splines 13 are spaced apart axially on the gear cylinder 10.

[0033] Using the planetary gear ring provided in this embodiment, the inner wall of the gear cylinder 10 is directly provided with internal teeth 11 and internal splines 12, and the outer wall of the gear cylinder 10 is provided with external splines 13. The gear sleeve 20 is sleeved on the outer wall of the gear cylinder 10 and fixedly connected to the gear cylinder 10. The outer wall of the gear sleeve 20 is provided with external teeth 21. This design integrates the internal and external gear rings in the traditional split structure into a single structure, ensuring coaxiality and thus improving assembly accuracy. Furthermore, since the internal teeth 11, internal splines 12, and external splines 13 are manufactured on the same base (gear cylinder 10), they can maintain extremely high coaxiality during processing.

[0034] It should be noted that internal and external splines can be freely combined with clutches or brakes to form different power transmission paths. For example, internal splines can be used with clutch 80, and external splines can be used with brake 90.

[0035] In this embodiment, the gear cylinder 10 and the gear sleeve 20 are welded together. Welding, as a mature connection technology, can ensure the strength and stability of the connection between the gear cylinder 10 and the gear sleeve 20. Welding melts the metal at high temperature, forming a metallurgical bond between the gear cylinder 10 and the gear sleeve 20, thereby improving the rigidity and load-bearing capacity of the overall structure, avoiding power transmission failure caused by loose connection, and enhancing the durability of the entire planetary gear ring.

[0036] Specifically, in the axial direction of the gear sleeve 20, both sides of the gear sleeve 20 are welded to the gear cylinder 10. The design of welding on both sides increases the connection area and improves the reliability of the connection. Specifically, this double-sided welding method can better distribute stress, reduce the load on a single weld point, and extend the component's lifespan. The technical solution in this embodiment enables the gear ring to remain stable under high torque, reducing the possibility of wear and failure.

[0037] like Figure 3 As shown, the two sides of the gear sleeve 20 are welded to the gear cylinder 10 through the first welding point 22 and the second welding point 23, respectively.

[0038] like Figure 1 and Figure 2 As shown, the planetary gear ring also includes a first bearing 30, which is disposed inside the gear cylinder 10, and the outer ring of the first bearing 30 is connected to the inner wall of the gear cylinder 10. The addition of the first bearing 30 reduces friction and improves efficiency when the gear cylinder 10 rotates.

[0039] Among them, the first bearing 30 is a ball bearing. The rolling friction of the ball bearing is much smaller than that of the sliding friction, which can significantly reduce energy consumption and enable the gear ring to maintain low heat generation and high efficiency at high speed, thus improving the overall performance.

[0040] like Figure 1 and Figure 2 As shown, the planetary gear ring also includes a second bearing 40, which is sleeved on the outer wall of the gear cylinder 10, and the inner ring of the second bearing 40 is connected to the outer wall of the gear cylinder 10. The arrangement of the second bearing 40 provides an additional support point, which helps to balance the radial force of the gear cylinder 10.

[0041] The second bearing 40 is also a ball bearing.

[0042] In this embodiment, the combined use of inner and outer bearings (first bearing 30 and second bearing 40) ensures the smooth operation of the gear ring under multi-directional forces, effectively reducing the vibration and noise of the gear ring and improving driving comfort.

[0043] It should be noted that both the first bearing 30 and the second bearing 40 are used to support the planetary gear ring on the gearbox housing.

[0044] like Figure 2 As shown, the first bearing 30 is located at the first end of the gear cylinder 10, and the second bearing 40 is located at the second end of the gear cylinder 10. The distance between the gear sleeve 20 and the first bearing 30 is greater than the distance between the gear sleeve 20 and the second bearing 40. This arrangement takes into account the force characteristics of the gear sleeve 20 and rationally distributes the supporting role of the bearings. The second bearing 40, which is closer to the gear sleeve 20, can more effectively counteract the radial force generated by the external teeth 21, enabling the gear ring to maintain good operating condition even when subjected to non-uniform loads and reducing the potential risk of damage.

[0045] The gear cylinder 10 is made of a different material than the gear sleeve 20. Using gear cylinder 10 and gear sleeve 20 made of different materials allows for optimization according to their respective functional requirements, fully utilizing the characteristics of different materials and improving the overall performance of the gear ring.

[0046] In this embodiment, the gear cylinder 10 is a medium carbon steel gear cylinder, and the gear sleeve 20 is a low carbon steel gear sleeve. Specifically, the medium carbon steel gear cylinder, after quenching and tempering and nitriding treatment, has good comprehensive mechanical properties and is suitable for manufacturing the internal gear 11 and internal spline 12; the low carbon steel gear sleeve, after normalizing and carburizing quenching treatment, can obtain high surface hardness and core toughness and is suitable for manufacturing the external gear 21.

[0047] In principle, this material selection balances the strength and wear resistance of the gear ring. In terms of effectiveness, the technical solution in this embodiment can effectively extend the service life of the gear ring and reduce maintenance costs.

[0048] like Figure 4 As shown, another embodiment of this utility model provides a planetary gear set assembly, which includes a planet carrier 50, a sun gear 60, and a planetary gear ring 70, wherein the planetary gear ring 70 is the aforementioned planetary gear ring. Therefore, this planetary gear set assembly can also integrate the internal and external gear rings in a traditional split structure, ensuring coaxiality and improving assembly accuracy. Furthermore, since the internal teeth 11, internal splines 12, and external splines 13 are manufactured on the same base (gear cylinder 10), they can maintain extremely high coaxiality during processing.

[0049] Furthermore, this planetary gear set integrates the advantages of an integrated internal and external gear ring, enabling efficient power transmission within a limited space. The interaction of the planet carrier 50, sun gear 60, and planetary gear ring 70 constitutes the core of the planetary gear system, enabling speed and torque conversion. The technical solution in this embodiment allows the planetary gear set to maintain stable performance under various operating conditions, improving vehicle driving efficiency.

[0050] Another embodiment of this utility model provides a vehicle, which includes a planetary gear set assembly, the planetary gear set assembly being the one described above. Therefore, this vehicle can also integrate the internal and external gear rings in a traditional split structure, ensuring coaxiality and thus improving assembly accuracy. Furthermore, since the internal gear 11, internal spline 12, and external spline 13 are manufactured on the same base (gear cylinder 10), they can maintain extremely high coaxiality during processing.

[0051] Furthermore, the vehicle employs an optimized planetary gear set, enabling smoother power output and more efficient energy utilization. The vehicle's powertrain, through the planetary gear set's gear shifting and torque conversion, can adapt to different driving conditions. In terms of effectiveness, the technical solution in this embodiment significantly improves the vehicle's driving experience and fuel economy.

[0052] In this embodiment, the vehicle is a hybrid vehicle.

[0053] The apparatus provided by the embodiments has the following beneficial effects:

[0054] The technical solution of this application can achieve the following significant beneficial effects, which are directly related to the innovation of the technical solution:

[0055] 1) The key to this technical solution lies in the integrated design of the internal and external gear rings, which fundamentally solves the problem of difficulty in ensuring coaxiality in the split design, ensures extremely high coaxiality, and thus greatly improves the overall assembly accuracy.

[0056] 2) Improved assembly precision results in more accurate gear meshing, reducing gear wear and vibration caused by coaxiality deviations and extending the transmission's service life. Simultaneously, the integrated design reduces the number of components, lowering the risk of failures due to improper component fit and enhancing transmission reliability.

[0057] 3) By optimizing material selection and heat treatment processes, the problem of different heat treatments for medium carbon steel and low carbon steel has been solved, which greatly reduces product costs and improves precision, and enables individual components to meet the strength and wear resistance requirements under different working environments.

[0058] 4) A ball bearing support method, with one end being an inner ball bearing support and the other end being an outer ball bearing support, which allows for better installation. Furthermore, using a ball bearing as the support structure significantly reduces friction and improves transmission efficiency.

[0059] In summary, the technical solution of this application not only solves the problem of low assembly accuracy in related technologies, but also improves the performance of gear transmission systems from multiple perspectives and reduces production costs.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0062] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A planetary gear ring, characterized in that, The planetary gear ring includes: A gear cylinder (10) is provided with internal teeth (11) and internal splines (12) on its inner sidewall. The internal teeth (11) and internal splines (12) are arranged at intervals in the axial direction of the gear cylinder (10). An external spline (13) is provided on the outer sidewall of the gear cylinder (10). A toothed sleeve (20) is fitted onto the outer side wall of the toothed cylinder (10) and fixedly connected to the toothed cylinder (10). The length of the toothed cylinder (10) is greater than the length of the toothed sleeve (20). The outer side wall of the toothed sleeve (20) is provided with external teeth (21). The toothed sleeve (20) and the external spline (13) are arranged at intervals along the axial direction of the toothed cylinder (10).

2. The planetary gear ring according to claim 1, characterized in that, The gear cylinder (10) and the gear sleeve (20) are welded together.

3. The planetary gear ring according to claim 2, characterized in that, Along the axial direction of the toothed sleeve (20), both sides of the toothed sleeve (20) are welded to the toothed cylinder (10).

4. The planetary gear ring according to claim 1, characterized in that, The planetary gear ring also includes a first bearing (30), which is disposed inside the gear cylinder (10), and the outer ring of the first bearing (30) is connected to the inner sidewall of the gear cylinder (10).

5. The planetary gear ring according to claim 4, characterized in that, The planetary gear ring also includes a second bearing (40), which is sleeved on the outer side wall of the gear cylinder (10), and the inner ring of the second bearing (40) is connected to the outer side wall of the gear cylinder (10).

6. The planetary gear ring according to claim 5, characterized in that, The first bearing (30) is located at the first end of the gear cylinder (10), the second bearing (40) is located at the second end of the gear cylinder (10), and the distance between the gear sleeve (20) and the first bearing (30) is greater than the distance between the gear sleeve (20) and the second bearing (40).

7. The planetary gear ring according to any one of claims 1 to 6, characterized in that, The material of the gear cylinder (10) is different from that of the gear sleeve (20).

8. The planetary gear ring according to claim 7, characterized in that, The gear cylinder (10) is a medium carbon steel gear cylinder; and / or, The tooth sleeve (20) is a low-carbon steel tooth sleeve.

9. A planetary gear assembly, characterized in that, The planetary gear assembly includes a planet carrier (50), a sun gear (60), and a planetary gear ring (70), wherein the planetary gear ring (70) is the planetary gear ring according to any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes a planetary gear set, which is the planetary gear set as described in claim 9.

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