Planetary row assembly and method of assembling same

Abstract

The present disclosure relates to the technical field of automatic gearbox, and particularly relates to a planetary gear set assembly and an assembling method thereof. The planetary gear set assembly comprises a first planetary gear set and a second planetary gear set; the first planetary gear set comprises a first planetary carrier and a first ring gear, and the second planetary gear set comprises a second planetary carrier, a second ring gear and a second sun gear; the first planetary carrier and the second ring gear are connected through an axial limiting piece; the first ring gear and the second planetary carrier are connected; and an ear is arranged on the outer wall of the second ring gear. The planetary gear set assembly only needs to be vertically placed, and the first planetary carrier is located at the end of the assembly in the first direction, so that the lifting action of the whole assembly can be realized through the lifting action of the second ring gear; through arranging the ear on the outer wall of the second ring gear, the planetary gear set assembly can be stably installed at the mounting position in the gearbox through a lifting tool, and the safety and the assembling efficiency of the assembling work can be significantly improved.

Description

Technical Field

[0001] This disclosure relates to the field of automatic transmission technology, and in particular to a planetary gearbox assembly and its assembly method. Background Technology

[0002] A car transmission is a gearbox that coordinates the engine speed and the actual speed of the wheels to optimize engine performance. During vehicle operation, the transmission can create different gear ratios between the engine and wheels, enabling the transmission of different engine speeds.

[0003] There are two types of transmissions: manual and automatic. Manual transmissions are mainly composed of gears and shafts, and different gear combinations produce speed and torque changes. Automatic transmissions (AT) are composed of a torque converter, planetary gears, and a hydraulic control system, and achieve speed and torque changes through hydraulic transmission and gear combinations.

[0004] Automatic transmissions, with their advantages of improved driving comfort and reduced driver fatigue, have become a popular trend in modern car configurations. They utilize planetary gear mechanisms for gear shifting, automatically changing gears based on accelerator pedal pressure and vehicle speed. Drivers only need to operate the accelerator pedal to control speed, allowing them to focus entirely on the road without the hassle of manual shifting.

[0005] Many automatic transmissions combine two adjacent planetary gear sets into a single assembly to improve the overall integrity of the transmission. However, when installing such planetary gear set assemblies, their weight often makes them difficult to transport from the assembly station to the installation location within the transmission, posing safety hazards and significantly impacting assembly efficiency. Summary of the Invention

[0006] To address the aforementioned technical problems, this disclosure provides a planetary gear set assembly and its assembly method.

[0007] In a first aspect, this disclosure provides a planetary array assembly, comprising: a first planetary array and a second planetary array;

[0008] The first planetary gear set includes a first planet carrier and a first ring gear, and the second planetary gear set includes a second planet carrier, a second ring gear, and a second sun gear.

[0009] The first planetary carrier and the second gear ring are connected by an axial limiting member; the first gear ring and the second planetary carrier are connected; one end of the second sun gear is connected to the first planetary carrier by an axial limiting member, and the other end is connected to the second planetary carrier by an axial limiting member; the second gear ring is sleeved on the outside of the first gear ring and the second planetary carrier;

[0010] The second gear ring has a lifting lug on its outer wall.

[0011] Optionally, the lug is an annular structure coaxially arranged with the second gear ring.

[0012] Optionally, the end face of the lifting lug along the first direction is a planar structure perpendicular to the first direction.

[0013] Optionally, a stabilizing ring is provided on the outer periphery of the lifting lug, the stabilizing ring extending along a first direction and forming a groove between the stabilizing ring and the outer wall of the second gear ring.

[0014] Optionally, the end of the stabilizing ring along the first direction smoothly transitions to the lug through a beveled structure.

[0015] Optionally, the number of lifting lugs is multiple, and the multiple lifting lugs are evenly arranged along the circumference.

[0016] Optionally, the first planetary carrier and the second gear ring are connected by an axial snap ring.

[0017] Optionally, one end of the second sun gear is connected to the first planet carrier via a thrust bearing, and the other end is connected to the second planet carrier via a thrust bearing.

[0018] Optionally, the lug is located at the outer edge of the end face of the second gear ring along the second direction.

[0019] Secondly, this disclosure provides a method for assembling the planetary gear assembly as described above, comprising the following steps:

[0020] S1. Connect the first gear ring and the second planetary carrier to form the second assembly, and place the second assembly vertically so that the first gear ring is above the second planetary carrier;

[0021] S2. Place one thrust bearing, the second sun gear, and the other thrust bearing coaxially on the second planetary carrier in sequence.

[0022] S3. The first planetary carrier and the second ring gear are connected by an axial snap ring to form the first component, and then fastened to the second component and the second sun gear in the second direction, so that the first component, the second component, the second sun gear and the two thrust bearings are connected to form the planetary gear assembly;

[0023] S4. Rotate the planetary gear assembly 180 degrees so that the second component is above the first component;

[0024] S5. Connect the lifting fixture to the lifting lugs;

[0025] S6. Use hoisting equipment to lift the planetary gearbox assembly to the installation position inside the gearbox.

[0026] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0027] The planetary gear assembly disclosed herein connects the first planetary carrier and the second ring gear using an axial limiting member to form a stable first component. The first ring gear and the second planetary carrier are then connected to form a second component. Neither the second sun gear nor the second component can move relative to the first component in a first direction due to the axial limiting member. At this point, simply placing the assembly vertically with the first planetary carrier at the end of the assembly in the first direction allows the entire assembly to be lifted by lifting the second ring gear. By providing lifting lugs on the outer wall of the second ring gear, the planetary gear assembly can be quickly, smoothly, safely, and accurately installed into the gearbox mounting position using lifting fixtures, significantly improving the safety and efficiency of the assembly process. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0029] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the planetary gear assembly described in an embodiment of the present disclosure;

[0031] Figure 2 This is an exploded view of the planetary gear assembly described in the embodiments of this disclosure;

[0032] Figure 3 for Figure 2 A magnified view of the area at point Z in the middle.

[0033] Among them, 11, first planetary carrier; 12, first gear ring; 21, second planetary carrier; 22, second gear ring; 23, second sun gear; 3, lifting lug; 4, stabilizer ring; 41, hook groove; 5, axial retaining ring; 6, thrust bearing. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0035] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0036] A car transmission is a gearbox that coordinates the engine speed and the actual speed of the wheels to optimize engine performance. During vehicle operation, the transmission can create different gear ratios between the engine and wheels, enabling the transmission of different engine speeds.

[0037] There are two types of transmissions: manual and automatic. Manual transmissions are mainly composed of gears and shafts, and different gear combinations produce speed and torque changes. Automatic transmissions (AT) are composed of a torque converter, planetary gears, and a hydraulic control system, and achieve speed and torque changes through hydraulic transmission and gear combinations.

[0038] Automatic transmissions, with their advantages of improved driving comfort and reduced driver fatigue, have become a popular trend in modern car configurations. They utilize planetary gear mechanisms for gear shifting, automatically changing gears based on accelerator pedal pressure and vehicle speed. Drivers only need to operate the accelerator pedal to control speed, allowing them to focus entirely on the road without the hassle of manual shifting.

[0039] Many automatic transmissions combine two adjacent planetary gear sets into a single assembly to improve the overall integrity of the transmission. However, when installing such planetary gear set assemblies, their weight often makes them difficult to transport from the assembly station to the installation location within the transmission, posing safety hazards and significantly impacting assembly efficiency.

[0040] Based on this, this embodiment provides a planetary gear set assembly and its assembly method. By connecting the first planet carrier and the second ring gear with an axial limiting member, the two are combined to form a stable first component. The first ring gear and the second planet carrier are then connected to form a second component. Neither the second sun gear nor the second component can move relative to the first component in a first direction due to the axial limiting member. At this point, simply placing the assembly vertically with the first planet carrier at the end of the assembly in the first direction allows the entire assembly to be lifted by lifting the second ring gear. By providing lifting lugs on the outer wall of the second ring gear, the planetary gear set assembly can be quickly, smoothly, safely, and accurately installed into the gearbox mounting position using lifting fixtures, significantly improving the safety and efficiency of the assembly work. The following detailed description uses specific embodiments:

[0041] Reference Figures 1 to 3As shown, the planetary gear assembly provided in this embodiment includes: a first planetary gear set and a second planetary gear set; the first planetary gear set includes a first planet carrier 11 and a first gear ring 12, and the second planetary gear set includes a second planet carrier 21, a second gear ring 22, and a second sun gear 23; the first planet carrier 11 and the second gear ring 22 are connected by an axial limiting member; the first gear ring 12 and the second planet carrier 21 are connected; one end of the second sun gear 23 is connected to the first planet carrier 11 by an axial limiting member, and the other end is connected to the second planet carrier 21 by an axial limiting member; the second gear ring 22 is sleeved on the outside of the first gear ring 12 and the second planet carrier 21; a lug 3 is provided on the outer wall of the second gear ring 22.

[0042] In this assembly, the first planetary carrier 11 and the second ring gear 22 are connected by an axial limiting member to form a stable first component. The first ring gear 12 and the second planetary carrier 21 are connected to form a second component. The second sun gear 23 and the second component cannot move relative to the first component in the first direction A due to the axial limiting member. At this time, it is only necessary to place the assembly vertically and position the first planetary carrier 11 at the end of the assembly in the first direction A. The entire assembly can be lifted by lifting the second ring gear 22. By setting the lifting lug 3 on the outer wall of the second ring gear 22, the planetary gear assembly can be quickly, smoothly, safely and accurately installed into the installation position in the gearbox using lifting tools, which can significantly improve the safety and efficiency of the assembly work.

[0043] In some embodiments, the lifting lug 3 is an annular structure coaxially arranged with the second gear ring 22; this arrangement can reduce the difficulty of connecting the lifting fixture and the lifting lug 3, achieve the purpose of circumferential full-angle lifting connection, further improve assembly efficiency, and the annular structure has no gaps, so even if the lifting fixture and the planetary gear assembly rotate relative to each other, they will not separate, further improving the safety of the assembly work.

[0044] In a further embodiment, the end face of the lifting lug 3 along the first direction A is a planar structure perpendicular to the first direction A. This arrangement ensures that the supporting force provided by the lifting fixture to the lifting lug 3 is opposite to the direction of gravity, preventing radial inward contraction and outward opening at the connection between the lifting fixture and the lifting lug 3. This prevents compression of the outer wall of the second gear ring 22, protects the second gear ring 22, and also prevents the planetary gear assembly from detaching from the lifting fixture.

[0045] Continue to refer to Figures 1 to 3As shown, a stabilizing ring 4 is provided on the outer periphery of the lifting lug 3. The stabilizing ring 4 extends along the first direction A and forms a groove 41 between the stabilizing ring 4 and the outer wall of the second gear ring 22. By setting the stabilizing ring 4, the end of the lifting tool can be inserted into the groove 41 between the stabilizing ring 4 and the outer wall of the second gear ring 22. It should be understood that the inner wall of the stabilizing ring 4 provides radial limitation for the lifting tool, thereby preventing the lifting tool from detaching from the planetary gear set assembly. This significantly improves the stability and reliability of the connection between the lifting tool and the planetary gear set assembly, and ensures the safety of the assembly work.

[0046] Continue to refer to Figures 1 to 3 As shown, the end of the stabilizing ring 4 along the first direction A smoothly transitions to the lifting lug 3 through an inclined structure. It should be noted that the inner diameter of the inclined structure can vary uniformly along the first direction A, as long as the inner diameter of the inclined structure gradually increases along the first direction A. That is to say, the connection between the inclined structure and the stabilizing ring 4 forms an open structure, and the connection between the inclined structure and the lifting lug 3 forms a closed structure. Through the setting of this inclined structure, after the lifting fixture is connected to the stabilizing ring 4, the gravity of the planetary gear assembly can be used to automatically guide the connection between the lifting fixture and the planetary gear assembly to the side of the hook groove 41 near the lifting lug 3, thereby improving the anti-detachment effect of the lifting fixture and further improving the safety of the assembly work.

[0047] In some embodiments, there are multiple lifting lugs 3, which are evenly arranged circumferentially; the redundant arrangement of the lifting lugs 3 makes it easier for the lifting fixture to be connected and aligned with the lifting lugs 3.

[0048] Continue to refer to Figure 1 and Figure 2 As shown, the first planetary carrier 11 and the second gear ring 22 are connected by an axial retaining ring 5; it should be understood that the first planetary carrier 11 and the second gear ring 22 are relatively fixed in the axial direction.

[0049] In some embodiments, one end of the second sun gear 23 is connected to the first planetary carrier 11 via a thrust bearing 6, and the other end is connected to the second planetary carrier 21 via a thrust bearing 6. The thrust bearing 6 enables the first planetary carrier 11 to provide support for the second sun gear 23 in the second direction B, and also enables the second sun gear 23 to provide support for the second planetary carrier 21 in the second direction B. This allows the second sun gear 23 and the second assembly to be lifted together when the second ring gear 22 is lifted in the second direction B. It also makes it easier to install and remove the second sun gear 23 and the second assembly, improving the assembly efficiency of the entire planetary gear set assembly.

[0050] Continue to refer to Figures 1 to 3As shown, the lifting lug 3 is located at the outer edge of the end face of the second gear ring 22 along the second direction B. This arrangement allows the height of the connection between the lifting fixture and the lifting lug 3 to be close to, or even higher than, the center of gravity of the entire planetary gear set assembly. This significantly improves the stability of the planetary gear set assembly during lifting, reduces its swaying, and further reduces the probability of the planetary gear set assembly slipping off the lifting fixture. Furthermore, machining the lifting lug 3 on the end face reduces machining difficulty and cost.

[0051] Continue to refer to Figure 1 As shown, the second direction B is the direction in which the first component moves axially toward the second component, and the first direction A is the opposite direction to the second direction B.

[0052] Secondly, this disclosure provides a method for assembling the planetary gear assembly as described above, comprising the following steps:

[0053] S1. Connect the first gear ring 12 and the second planetary carrier 21 to form a second assembly, and place the second assembly vertically so that the first gear ring 12 is located above the second planetary carrier 21;

[0054] S2. Place one thrust bearing 6, the second sun gear 23 and the other thrust bearing 6 coaxially on the second planetary carrier 21 in sequence.

[0055] S3. The first planetary carrier 11 and the second gear ring 22 are connected by an axial snap ring 5 to form a first component, and are fastened to the second component and the second sun gear 23 along the second direction, so that the first component, the second component, the second sun gear 23 and the two thrust bearings 6 are connected to form a planetary gear assembly; the outer periphery of the planetary gear assembly is a barrel-shaped structure formed by the first component, and the first component, the thrust bearings 6 and the second sun gear 23 are all located inside the first component, and the overall structure is stable and reliable;

[0056] S4. Rotate the planetary gear assembly 180 degrees so that the second component is above the first component;

[0057] S5. Connect the lifting fixture to the lifting lug 3;

[0058] S6. Use hoisting equipment to lift the planetary gearbox assembly to the installation position inside the gearbox; when lifting lug 3, the first component can support the entire planetary gearbox assembly and transport it stably and safely to the installation position in the air.

[0059] The specific implementation method and principle are the same as those in the above embodiments, and can bring the same or similar technical effects. They will not be repeated here. For details, please refer to the description of the above planetary gear assembly embodiments.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for assembling a planetary gear set assembly, characterized in that, The planetary array assembly includes: a first planetary array and a second planetary array; The first planetary gear set includes a first planet carrier (11) and a first gear ring (12), and the second planetary gear set includes a second planet carrier (21), a second gear ring (22), and a second sun gear (23). The first planetary carrier (11) and the second gear ring (22) are connected by an axial snap ring (5); the first gear ring (12) and the second planetary carrier (21) are connected; one end of the second sun gear (23) is connected to the first planetary carrier (11) by a thrust bearing (6), and the other end is connected to the second planetary carrier (21) by a thrust bearing (6); the second gear ring (22) is sleeved on the outside of the first gear ring (12) and the second planetary carrier (21); The second gear ring (22) has a lifting lug (3) on its outer wall; The lug (3) is a ring structure coaxially arranged with the second gear ring (22); The assembly method includes the following steps: S1. Connect the first gear ring (12) and the second planetary carrier (21) to form a second assembly, and place the second assembly vertically so that the first gear ring (12) is above the second planetary carrier (21); S2. Place one thrust bearing (6), the second sun gear (23) and the other thrust bearing (6) coaxially on the second planetary carrier (21). S3. The first planetary carrier (11) and the second gear ring (22) are connected by an axial snap ring (5) to form a first component, and are fastened on the second component and the second sun gear (23) along the second direction, so that the first component, the second component, the second sun gear (23) and the two thrust bearings (6) are connected to form a planetary gear assembly; S4. Rotate the planetary gear assembly 180 degrees so that the second component is above the first component; S5. Connect the hoisting fixture to the lifting lug (3); S6. Use hoisting equipment to lift the planetary gearbox assembly to the installation position inside the gearbox.

2. The method for assembling a planetary gear set assembly according to claim 1, characterized in that, The end face of the lug (3) along the first direction is a planar structure perpendicular to the first direction; the first direction is opposite to the second direction.

3. The method for assembling a planetary gear set assembly according to claim 2, characterized in that, The outer periphery of the lug (3) is provided with a stabilizing ring (4), which extends along a first direction and forms a groove (41) between the stabilizing ring (4) and the outer wall of the second gear ring (22).

4. The method for assembling a planetary gear set assembly according to claim 3, characterized in that, The end of the stabilizing ring (4) along the first direction smoothly transitions to the lug (3) through a sloped structure.

5. The method for assembling a planetary gear set assembly according to any one of claims 1 to 4, characterized in that, The lug (3) is located at the outer edge of the end face of the second gear ring (22) along the second direction.

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