Planetary gearbox

Abstract

The application provides a planetary gear box, which comprises a planet carrier (101) and an oil collecting disc (200), the oil collecting disc (200) is fixedly connected to the axial end face of the planet carrier (101), a sealing element (300) is arranged between the planet carrier (101) and the oil collecting disc (200), the sealing element (300) extends along the circumference (C) of the planet carrier (101) to form a ring, and the sealing element (300) can seal the gap between the planet carrier (101) and the oil collecting disc (200).

Description

Technical Field

[0001] This application belongs to the technical field of vehicle transmission systems, and specifically relates to a planetary gearbox. Background Technology

[0002] CN118401770A discloses an oil collection tray that is mounted to the side of a planetary carrier via a snap-fit ​​element. Utility Model Content

[0003] This application aims to provide a planetary gearbox to improve or solve the problems existing in the prior art.

[0004] The embodiments of this application provide a planetary gearbox, which includes a planetary carrier and an oil collection tray. The oil collection tray is fixedly connected to the axial end face of the planetary carrier. A sealing element is provided between the planetary carrier and the oil collection tray. The sealing element extends circumferentially along the planetary carrier to form an annular shape. The sealing element is capable of sealing the gap between the planetary carrier and the oil collection tray.

[0005] In at least one possible implementation, the seal corresponds to the inner circumference of the oil collection pan in the radial direction.

[0006] In at least one possible implementation, the oil collection tray includes an oil collection tray body forming an annular oil collection space, and the seal is located radially inside the oil collection space in the radial direction of the oil collection tray.

[0007] In at least one possible implementation, the oil collection tray includes an oil collection tray body, the oil collection tray body includes a first end wall, a second end wall and a peripheral wall, the first end wall and the second end wall are connected to the two axial ends of the peripheral wall, the first end wall is closer to the planet carrier than the second end wall, and a tapered section is provided on the radially inner side of the first end wall, the tapered section is more inclined toward the side where the planet carrier is located as it extends radially inner.

[0008] In at least one possible implementation, the inner circumference of the tapered segment and the seal are located at the same radial position in the radial direction of the oil collection tray, with the tapered segment fitting against the seal.

[0009] In at least one possible implementation, the inner diameter of the first end wall is smaller than the inner diameter of the second end wall.

[0010] In at least one possible implementation, the oil collecting tray includes a plurality of oil guide pipes, which are fixedly connected to the body of the oil collecting tray and extend along the axial direction of the oil collecting tray. The oil guide pipes are in communication with the oil collecting space.

[0011] In at least one possible implementation, the end face of the planetary carrier is provided with a seal receiving groove, the seal receiving groove is annular, and the seal is received in the seal receiving groove, or the seal is attached to the inner periphery of the oil collection tray.

[0012] In at least one possible implementation, the sealant is a sealant.

[0013] In at least one possible implementation, the seal is an O-ring.

[0014] By adopting the above technical solution, the gap between the planetary carrier and the oil collection tray is sealed with a sealant to prevent oil leakage and improve oil collection efficiency and lubrication performance. Attached Figure Description

[0015] Figure 1 A partial structural schematic diagram of a planetary gearbox according to a first embodiment of this application is shown.

[0016] Figure 2 An exploded view of a partial structure of a planetary gearbox according to a first embodiment of this application is shown.

[0017] Figure 3 A partial front view of a planetary gearbox according to a first embodiment of this application is shown.

[0018] Figure 4 A partially enlarged view of the planet carrier of a planetary gearbox according to a first embodiment of this application is shown.

[0019] Figure 5 A partially enlarged cross-sectional view of the planet carrier of a planetary gearbox according to a first embodiment of this application is shown.

[0020] Figure 6 A partially enlarged cross-sectional view of the planet carrier of a planetary gearbox according to a first embodiment of this application is shown.

[0021] Figure 7 A partially enlarged cross-sectional view of the planet carrier of a planetary gearbox according to a second embodiment of this application is shown.

[0022] Explanation of reference numerals in the attached figures

[0023] 100 Planetary gear assembly; 101 Planetary carrier; 102 Planetary gear.

[0024] 200 oil collection tray

[0025] 300 Seal 301 Seal Receiving Groove

[0026] 1. Oil collecting tray body 11. First end wall 12. Second end wall 13. Peripheral wall 14. Clip

[0027] 2. Oil guide pipe

[0028] Axial direction C Circumferential direction R Radial direction Detailed Implementation

[0029] To more clearly illustrate the above-mentioned objectives, features, and advantages of this application, specific embodiments of this application are described in detail in conjunction with the accompanying drawings in this section. Besides the embodiments described in this section, this application can also be implemented in other different ways. Those skilled in the art can make corresponding improvements, modifications, and substitutions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed in this section. The scope of protection of this application should be determined by the claims.

[0030] (First Implementation)

[0031] like Figures 1 to 7 As shown, an embodiment of this application proposes a planetary gearbox, which includes a planetary gear assembly 100 and an oil collection tray 200. The oil collection tray 200 can be installed on one axial side of the planetary gear assembly 100. The oil collection tray 200 is used to collect oil that splashes or sprays in the planetary gearbox and guide it to the planetary gear assembly 100.

[0032] like Figure 1 As shown, the planetary gear assembly 100 may include a sun gear, a ring gear, a planet carrier 101, and a plurality of planet gears 102. The plurality of planet gears 102 are rotatably connected to the planet carrier 101 and are arranged circumferentially C along the planetary gear assembly (sun gear). The sun gear is located radially inner to the plurality of planet gears 102, and the ring gear is located radially outer to the plurality of planet gears 102. The planet gears 102 mesh with both the sun gear and the ring gear.

[0033] Specifically, the planetary gear 102 can be mounted to the planet carrier 101 via a pin, and a bearing can be provided between the planetary gear 102 and the pin. The pin can be provided with a central hole and an oil injection hole, and the oil injection hole can penetrate the peripheral wall of the central hole, so that oil can be guided to the bearing through the oil injection hole.

[0034] like Figures 1 to 3 and Figure 6As shown, the oil collection tray 200 may include an oil collection tray body 1 and multiple oil guide pipes 2. The oil collection tray body 1 can be generally annular (including approximately annular), and the oil guide pipes 2 can be fixedly connected (including integrally formed) to the oil collection tray body 1. The oil guide pipes 2 can extend along the axial direction A of the oil collection tray 200. The number of oil guide pipes 2 and the number of planetary gears 102 can be the same, for example, three oil guide pipes and three planetary gears 102 are provided. The multiple oil guide pipes 2 can be arranged circumferentially C along the oil collection tray 200. The oil guide pipes 2 can be inserted into the central hole of the pin 103, and oil can be guided into the central hole of the pin 103 through the oil guide pipes 2, and then flow to the bearing for lubrication.

[0035] like Figure 2 As shown, the end face of the oil collection tray body 1 facing the planetary carrier 101 can be provided with a buckle 14, and the planetary carrier 101 can be provided with a slot that cooperates with the buckle 14. Through the cooperation of the buckle 14 and the slot, the oil collection tray 200 can be snapped onto the planetary carrier 101.

[0036] The oil collecting tray body 1 may include a first end wall 11, a second end wall 12, and a peripheral wall 13. The first end wall 11 and the second end wall 12 generally extend radially (R) and circumferentially (C), while the peripheral wall 13 generally extends axially (A) and circumferentially (C). The first end wall 11 and the second end wall 12 are respectively connected to the two axial ends of the peripheral wall 13. The first end wall 11, the second end wall 12, and the peripheral wall 13 can form an oil collecting space S. The oil guide pipe 2 can be connected to the oil collecting space S to receive the oil collected in the oil collecting space S, and then flow to the bearing for lubrication.

[0037] The first end wall 11, the second end wall 12, and the peripheral wall 13 can be integral, for example, the first end wall 11, the second end wall 12, and the peripheral wall 13 can be made by injection molding.

[0038] like Figure 2 and Figure 6 As shown, a seal 300 can be provided between the planetary carrier 101 and the oil collection pan 200. The seal 300 can extend circumferentially along the planetary carrier 101 in a ring shape, and can seal the gap between the planetary carrier 101 and the oil collection pan 200. On the radial direction R of the oil collection pan 200, the seal 300 can correspond to the inner circumference of the oil collection pan 200, and the seal 300 can be located radially inside the oil collection space S. This can prevent some oil from entering the gap between the planetary carrier 101 and the oil collection pan 200 during the process of oil being collected into the oil collection space S.

[0039] Optionally, the inner diameter of the first end wall 11 can be smaller than the inner diameter of the second end wall 12. A tapered section 111 can be provided on the radially inner side of the first end wall 11, and the tapered section 111 is inclined towards the side where the planetary carrier 101 is located as it extends radially inward. After the oil collection tray 200 is installed on the planetary carrier 101, the tapered section 111 can fit tightly against the planetary carrier 101 and can also be compressed to produce a certain amount of elastic deformation.

[0040] On the radial direction R of the oil collection tray 200, the inner circumference of the tapered section 111 and the seal 300 can be in the same radial position, and the tapered section 111 can fit against the seal 300. The seal 300 can seal the gap between the inner circumference of the first end wall 11 and the planetary carrier 101 to prevent oil leakage.

[0041] like Figures 4 to 6 As shown, the end face of the planetary carrier 101 facing the oil collection tray 200 may be provided with a seal receiving groove 301. The seal receiving groove 301 may be an annular shape extending along the circumferential direction C of the planetary gear assembly 100, and the seal 300 may be accommodated in the seal receiving groove 301.

[0042] The seal 300 can be a sealant, which can be applied to the seal receiving groove 301, and then the oil collection tray 200 is installed on the planetary carrier 101. After the sealant cures, the planetary carrier 101 and the oil collection tray 200 can be bonded together, and the gap between the planetary carrier 101 and the oil collection tray 200 is sealed by the sealant. Figure 6 The one-way arrow in the diagram indicates the direction of oil flow. During the process of oil being collected in the oil collection space S, the oil flows radially outward. Due to the sealing effect of the seal 300, no oil will enter the gap between the planetary carrier 101 and the oil collection plate 200. Therefore, the oil collection space S can collect more oil.

[0043] It is understandable that sealing the gap between the planetary carrier 101 and the oil collection tray 200 using the seal 300 not only improves sealing reliability but also eliminates the need for precise dimensional fitting, thus reducing the requirements on the material properties of the oil collection tray 200 (such as material shrinkage rate and dimensional stability), thereby lowering costs. For example, the oil collection tray 200 can be made of one or more materials selected from Nylon 6 (PA6), polypropylene (PP), polybutylene terephthalate (PBT), and ABS plastic, with or without glass fiber (GF). The oil collection tray 200 can be injection molded.

[0044] (Second Implementation)

[0045] like Figure 7 As shown, the second embodiment of this application proposes a planetary gearbox, which includes a planetary gear assembly and an oil collection tray.

[0046] The planetary gearbox of the second embodiment has the same overall structure as the planetary gearbox of the first embodiment, and therefore will not be described again. The same reference numerals are used to denote the same or similar components. The difference between the planetary gearbox of the second embodiment and the planetary gearbox of the first embodiment lies in the seals.

[0047] like Figure 7 As shown, the seal 300 can be a sealing ring, such as an O-ring. The O-ring can be accommodated in the seal receiving groove 301. After the oil collection tray 200 is installed on the planetary carrier 101, the conical section 111 is tightly attached to the O-ring. The O-ring can be deformed by the conical section 111 and fill the gap between the conical section 111 and the planetary carrier 101, thereby playing a sealing role and preventing oil leakage from the gap, thus improving the lubrication effect.

[0048] This application is not limited to the above embodiments. Those skilled in the art can make various modifications to the above embodiments of this application under the guidance of this application, without departing from the scope of this application. In addition, the following description is provided.

[0049] (1) In the above specific embodiment, the planetary carrier 101 is provided with a seal receiving groove 301 for accommodating the seal 300, but this application is not limited thereto. In other possible embodiments, the seal 300 may be attached to the oil collection tray, for example, attached to (e.g., vulcanized to) the inner periphery of the first end wall 11.

[0050] The tapered segment 111 is optional and can be omitted.

[0051] (2) In the above specific embodiments, the seal 300 can correspond to the radial inner side of the oil collection tray 200, but this application is not limited to this. In other possible embodiments, the seal 300 can correspond to other positions, as long as it is located between the oil collection tray 200 and the planetary carrier 101.

[0052] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.

[0053] It is understood that, in this application, when the number of parts or components is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of parts or components shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not restrictive, and can be understood as multiple, i.e., two or more; however, this does not mean that this application excludes the case of one.

[0054] In this application, unless otherwise expressly stated or limited, terms such as "installation," "assembly," "connection," "linking," "joining," "linking," "abutment," "communication," "connection," "conduction," "fixing," and "fastening" should be interpreted broadly, for example, they can be direct or indirect. For instance, regarding connection, 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 communication of two components or the interaction between two components, unless otherwise expressly stated or limited. For instance, regarding communication / conduction, it can be direct communication / conduction or indirect communication / conduction through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly stated or limited, a component being disposed / installed / located / enclosed / placed within, inside, or incorporated in another component can be either of the following two situations: a portion or a majority of the one component is located within the other component; or the one component is completely enclosed within the other component.

[0056] Although the present application has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described herein. The present application can be modified and implemented as alternative embodiments without departing from the spirit and scope of the present application as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present application.

Claims

1. A planetary gearbox, characterized in that, It includes a planetary carrier and an oil collection tray, the oil collection tray being fixedly connected to the axial end face of the planetary carrier, and a sealing element being provided between the planetary carrier and the oil collection tray. The seal extends circumferentially around the planetary carrier to form a ring, and the seal is capable of sealing the gap between the planetary carrier and the oil collection tray.

2. The planetary gearbox according to claim 1, characterized in that, In the radial direction of the oil collection tray, the seal corresponds to the inner circumference of the oil collection tray.

3. The planetary gearbox according to claim 1, characterized in that, The oil collection tray includes an oil collection tray body, which forms an annular oil collection space. In the radial direction of the oil collection tray, the seal is located on the radial inner side of the oil collection space.

4. The planetary gearbox according to claim 1, characterized in that, The oil collection tray includes an oil collection tray body, which includes a first end wall, a second end wall, and a peripheral wall. The first end wall and the second end wall are connected to the two axial ends of the peripheral wall. The first end wall is closer to the planet carrier than the second end wall. A tapered section is provided on the radially inner side of the first end wall. The tapered section is more inclined toward the side where the planet carrier is located as it extends radially inner.

5. The planetary gearbox according to claim 4, characterized in that, In the radial direction of the oil collection tray, the inner circumference of the tapered section and the seal are at the same radial position, and the tapered section fits against the seal.

6. The planetary gearbox according to claim 4, characterized in that, The inner diameter of the first end wall is smaller than the inner diameter of the second end wall.

7. The planetary gearbox according to claim 3, characterized in that, The oil collection tray includes multiple oil guide pipes, which are fixedly connected to the main body of the oil collection tray. The oil guide pipes extend along the axial direction of the oil collection tray and are connected to the oil collection space.

8. The planetary gearbox according to claim 1, characterized in that, The planetary carrier has a sealing element receiving groove on its end face. The sealing element receiving groove is annular, and the sealing element is received in the sealing element receiving groove, or the sealing element is attached to the inner periphery of the oil collection tray.

9. The planetary gearbox according to claim 1, characterized in that, The sealing element is a sealant.

10. The planetary gearbox according to claim 1, characterized in that, The sealing element is an O-ring.

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