Planetary gear assembly process, gearbox and vehicle

Abstract

The present disclosure relates to the technical field of gearbox assembly, and in particular to a planetary gear assembly assembly process, a gearbox, and a vehicle. The planetary gear assembly assembly process includes the following steps: S1, welding the connecting plate to the first planetary carrier; S2, welding the second ring gear to the connecting plate by horizontal welding; S3, installing the first planetary gear on the first planetary carrier; S4, placing the first bearing into the first planetary carrier, and then placing the first sun gear into the first planetary carrier and meshing with the first planetary gear, with the first end face of the first sun gear abutting the first bearing. The planetary gear assembly process connects the first planetary carrier and the second ring gear by the connecting plate, realizes the connection of the skeletons of the two planetary gears, and completes the preliminary assembly of the entire planetary gear set; in S2, the second ring gear is connected to the connecting plate by horizontal welding, and this connection method can effectively avoid the second ring gear from interfering with the first ring gear in the radial direction.

Description

Technical Field

[0001] The present disclosure relates to the technical field of gearbox assembly, and in particular to a planetary gear assembly assembly process, a gearbox, and a vehicle. Background Art

[0002] A car's transmission is a gearshift device that coordinates engine speed with the actual speed of the wheels, ensuring optimal engine performance. The transmission can create different speed ratios between the engine and wheels during driving, enabling transmission of speed at different gears.

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

[0004] Automatic transmissions, with their advantages of driving comfort and reducing driver fatigue, have become a key feature of modern sedans. Automatic transmissions utilize a planetary gear mechanism to automatically shift gears based on the pressure of the accelerator pedal and vehicle speed. Drivers only need to operate the accelerator pedal to control vehicle speed, allowing them to focus on traffic without being distracted by shifting gears.

[0005] At present, many automatic transmissions will assemble the two internal planetary gears into one planetary gear group in order to shorten the axial space. However, when the two planetary gears are combined into one planetary gear group, the ring gears of the two planetary gears will interfere with each other in the radial direction, thereby affecting the stability and reliability of the entire planetary gear group. Summary of the Invention

[0006] In order to solve the above technical problems, the present disclosure provides a planetary gear assembly process, a gearbox and a vehicle.

[0007] In a first aspect, the present disclosure provides a planetary gear assembly assembly process, comprising the following steps:

[0008] S1. Welding the connecting plate to the first planet carrier;

[0009] S2. Connect the second gear ring to the connecting plate by horizontal welding;

[0010] S3, installing the first planet gear on the first planet carrier;

[0011] S4. Place the first bearing into the first planet carrier, then place the first sun gear into the first planet carrier and mesh with the first planet gears, with the first end face of the first sun gear abutting against the first bearing;

[0012] S5. A second bearing is disposed in contact with the second end surface of the first sun gear;

[0013] S6, connecting the second planet carrier and the first ring gear together;

[0014] S7. Place the planetary gear assembly formed by assembling the first planetary gear and the second planetary gear into the gearbox, and make the second planetary carrier abut against the internal structure of the gearbox through the third bearing.

[0015] Optionally, S2 is specifically to clip-sleeve the second gear ring onto the annular groove on the connecting plate, and then perform welding connection by horizontal welding.

[0016] Optionally, the second gear ring is interference fit with the annular groove.

[0017] Optionally, the annular groove is located at the outer edge of the connecting plate, and the width of the annular groove matches the thickness of the second gear ring.

[0018] Optionally, S6 is specifically: inserting the second planet carrier into the first ring gear along the axial direction, and the second planet carrier is circumferentially limited to the first ring gear by a rectangular tooth structure.

[0019] Optionally, a slot is provided on the rectangular tooth structure, a retaining spring is provided in the slot, the retaining spring abuts against the end face of the second planet carrier and is used to axially limit the second planet carrier.

[0020] Optionally, S1 specifically comprises a plurality of welding pillars evenly arranged circumferentially on the first planetary carrier, a welding hole corresponding one-to-one to each of the welding pillars is provided on the connecting plate, the welding holes are plugged into the welding pillars, and then the welding holes are welded to the welding pillars by vertical welding.

[0021] Optionally, the welding hole and the welding support are interference fit.

[0022] In a second aspect, the present disclosure provides a gearbox using the planetary gear assembly assembly process described above.

[0023] In a third aspect, the present disclosure provides a vehicle comprising the gearbox as described above.

[0024] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0025] The planetary gear assembly assembly process provided by the present invention connects the first planetary carrier and the second ring gear through a connecting plate, realizes the connection of the skeletons of the two planetary gears, and completes the preliminary assembly work of the entire planetary gear group; in S2, the second ring gear and the connecting plate are connected by horizontal welding, that is, the axial end face of the second ring gear is abutted against the axial end face of the connecting plate, and then the radial outer surface of the second ring gear and the radial outer surface of the connecting plate are welded together for one circle. This connection method can effectively avoid the radial interference of the second ring gear on the first ring gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a flow chart of the planetary gear assembly assembly process according to an embodiment of the present disclosure;

[0029] Figure 2 This is a schematic structural diagram of a planetary gear assembly according to an embodiment of the present disclosure;

[0030] Figure 3 This is a schematic structural diagram of the planetary gear assembly after the connecting plate and the first planet carrier are connected in an embodiment of the present disclosure.

[0031] Among them, 1. connecting plate; 11. annular groove; 12. welding hole; 21. first planetary carrier; 211. welding pillar; 22. first ring gear; 23. first sun gear; 24. first planetary gear; 31. second planetary carrier; 32. second ring gear; 41. first bearing; 42. second bearing; 43. third bearing; 51. rectangular tooth structure; 52. retaining spring. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0034] A car's transmission is a gearshift device that coordinates engine speed with the actual speed of the wheels, ensuring optimal engine performance. The transmission can create different speed ratios between the engine and wheels during driving, enabling transmission of speed at different gears.

[0035] There are two types of gearboxes: manual and automatic. Manual gearboxes are mainly composed of gears and shafts, and produce speed and torque changes through different gear combinations; while automatic gearboxes AT are composed of a torque converter, planetary gears and a hydraulic control system, and achieve the purpose of speed and torque changes through hydraulic transmission and gear combinations.

[0036] Automatic transmissions, with their advantages of driving comfort and reducing driver fatigue, have become a key feature of modern sedans. Automatic transmissions utilize a planetary gear mechanism to automatically shift gears based on the pressure of the accelerator pedal and vehicle speed. Drivers only need to operate the accelerator pedal to control vehicle speed, allowing them to focus on traffic without being distracted by shifting gears.

[0037] At present, many automatic transmissions will assemble the two internal planetary gears into one planetary gear group in order to shorten the axial space. However, when the two planetary gears are combined into one planetary gear group, the ring gears of the two planetary gears will interfere with each other in the radial direction, thereby affecting the stability and reliability of the entire planetary gear group.

[0038] Based on this, this embodiment provides a planetary gear assembly process, a gearbox, and a vehicle. The first planetary carrier is connected to the second ring gear by a connecting plate, thereby connecting the skeletons of the two planetary gears and completing the preliminary assembly of the entire planetary gear set. In S2, the second ring gear is connected to the connecting plate by horizontal welding, that is, the axial end face of the second ring gear is abutted against the axial end face of the connecting plate, and then the radial outer surface of the second ring gear is welded to the radial outer surface of the connecting plate for one circle. This connection method can effectively avoid the radial interference of the second ring gear on the first ring gear. It should be understood that the outer diameter of the second ring gear is the same as the outer diameter of the connecting plate and is smaller than the inner diameter of the first ring gear. The following is a detailed description of this through specific embodiments:

[0039] Reference Figures 1 to 3As shown, the present embodiment provides a planetary gear assembly assembly process including the following steps: S1, welding the connecting plate 1 to the first planetary carrier 21; S2, welding the second ring gear 32 to the connecting plate 1 by horizontal welding; S3, installing the first planetary gear 24 on the first planetary carrier 21; S4, placing the first bearing 41 into the first planetary carrier 21, and then placing the first sun gear 23 into the first planetary carrier 21, and meshing with the first planetary gear 24, with the first end face of the first sun gear 23 abutting against the first bearing 41; S5, setting the second bearing 42 abutting against the second end face of the first sun gear 23; S6, connecting the second planetary carrier 31 and the first ring gear 22 together; S7, placing the planetary gear group formed by assembling the first planetary gear and the second planetary gear into the gearbox, and making the second planetary carrier 31 abut against the structure inside the gearbox through the third bearing 43.

[0040] Among them, the first planetary carrier 21 and the second ring gear 32 are connected by the connecting plate 1, thereby realizing the connection of the skeletons of the two planetary gears and completing the preliminary assembly of the entire planetary gear group; in S2, the second ring gear 32 and the connecting plate 1 are connected by horizontal welding, that is, the axial end face of the second ring gear 32 is abutted against the axial end face of the connecting plate 1, and then the radial outer surface of the second ring gear 32 and the radial outer surface of the connecting plate 1 are welded together for one circle. This connection method can effectively avoid the thickness of the second ring gear 32 from interfering with the first ring gear 22 in the radial direction; and achieves the purpose of reliably welding the second ring gear 32 on the connecting plate 1 with limited radial dimensions.

[0041] It should be understood that the outer diameter of the second gear ring 32 is the same as the outer diameter of the connecting plate 1 and is smaller than the inner diameter of the first gear ring 22 .

[0042] In some embodiments, S2 specifically comprises clamping the second gear ring 32 onto the annular groove 11 on the connecting plate 1, and then welding the second gear ring 32 to the connecting plate 1 by means of horizontal welding. By clamping the second gear ring 32 into the annular groove 11, the second gear ring 32 can be welded more stably and the shaking of the second gear ring 32 on the connecting plate 1 can be reduced.

[0043] Continue to refer to Figure 2 and Figure 3 As shown, the second gear ring 32 is interference fit with the annular groove 11; it should be understood that after the second gear ring 32 is clipped onto the annular groove 11, the interference fit between the two is utilized, which is equivalent to fixing the second gear ring 32 and the connecting plate 1 into one, thereby further improving the stability when welding the second gear ring 32.

[0044] Continue to refer to Figure 2 and Figure 3As shown, the annular groove 11 is located at the outer edge of the connecting plate 1, and the width of the annular groove 11 matches the thickness of the second gear ring 32. It should be understood that the width of the annular groove 11 refers to the distance it extends radially, and the thickness of the second gear ring 32 refers to the distance it extends radially; that is, when the second gear ring 32 is snapped onto the annular groove 11, the outer wall of the second gear ring 32 coincides with the outer wall of the connecting plate 1, forming a cylindrical structure with the same diameter, which not only makes the horizontal welding of the second gear ring 32 smoother, but also forms a smooth surface structure to reduce interference with surrounding parts.

[0045] Continue to refer to Figure 1 and Figure 2 As shown, S6 specifically involves axially inserting the second planetary carrier 31 onto the first ring gear 22, and circumferentially limiting the second planetary carrier 31 and the first ring gear 22 through a rectangular tooth structure 51; it should be understood that a rectangular tooth structure 51 is provided on the end face of the first ring gear 22, and a gear-like structure meshing with the rectangular tooth structure 51 is provided on the circumference of the second planetary carrier 31, and circumferential limitation is achieved through the meshing of the two.

[0046] Continue to refer to Figure 2 As shown, a slot is provided on the rectangular tooth structure 51, and a retaining spring 52 is provided in the slot. The retaining spring 52 is against the end face of the second planetary carrier 31 and is used to axially limit the second planetary carrier 31. It should be understood that the axial and circumferential limitations of the second planetary carrier 31 are achieved by the retaining spring 52 and the rectangular tooth structure 51, which can prevent the second planetary carrier 31 from being rigidly connected to the first ring gear 22. The retaining spring 52 and the rectangular tooth structure 51 can create a certain amount of shaking between the second planetary carrier 31 and the first ring gear 22, thereby protecting the parts from stress damage caused by the rigid connection. Moreover, this connection method can effectively absorb the noise generated by the parts during operation, improve the NVH performance of the gearbox, and improve the driving experience of the vehicle.

[0047] Continue to refer to Figure 3As shown, S1 specifically, a plurality of welding struts 211 are evenly arranged along the circumference on the first planetary carrier 21, and a welding hole 12 corresponding to each welding strut 211 is provided on the connecting plate 1, and the welding hole 12 is plugged into the welding strut 211, and then the welding hole 12 and the welding strut 211 are welded together by vertical welding; such an arrangement can form a preliminary connection relationship between the connecting plate 1 and the first planetary carrier 21 before the welding work is carried out, thereby ensuring the relative stability between the two; it should be noted that all the welding struts 211 are arranged in an annular structure along the same welding pitch circle, and the inner side surface of the welding strut 211 is welded to the connecting plate 1 by vertical welding. Such an arrangement can cooperate with the outer edge of the first planetary carrier 21 and the connecting plate 1 to be welded by horizontal welding. At this time, the two welding points have a certain distance in the radial direction, which can avoid affecting the welding effect of each other and forming interference, thereby forming two stable and reliable welding connections on the connecting plate 1 whose radial size is limited by the first gear ring 22;

[0048] In some embodiments, the welding pillars 211 are multiple arc-shaped structures, and the multiple welding pillars 211 surround to form a complete circle. This arrangement can further ensure that the force at the connection between the welding pillars 211 and the connecting plate 1 is uniform.

[0049] In some embodiments, the welding hole 12 is interference fit with the welding support 211; such a setting can achieve a preliminary fixed connection between the first planetary carrier 21 and the connecting plate 1 after the welding support 211 is inserted into the welding hole 12, thereby ensuring relative stability between the connecting plate 1 and the first planetary carrier 21 when welding the two, and ensuring a good welding effect.

[0050] In a second aspect, the present disclosure provides a gearbox using the planetary gear assembly assembly process described above.

[0051] In a third aspect, the present disclosure provides a vehicle comprising the gearbox as described above.

[0052] The specific implementation method and implementation principle are the same as those in the above embodiment, and can bring the same or similar technical effects, which will not be described here one by one. For details, please refer to the description of the above planetary gear assembly process embodiment.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0054] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. 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 the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A planetary gear assembly process, characterized in that: The steps include: S1, welding the connecting plate (1) to the first planet carrier (21); S2, welding the second gear ring (32) and the connecting plate (1) together by horizontal welding; S3, installing the first planet gear (24) on the first planet carrier (21); S4. Place the first bearing (41) into the first planet carrier (21), then place the first sun gear (23) into the first planet carrier (21), and mesh with the first planet gear (24), with the first end face of the first sun gear (23) abutting against the first bearing (41); S5, placing the second bearing (42) in contact with the second end surface of the first sun gear (23); S6, connecting the second planet carrier (31) and the first ring gear (22); S7. Place the planetary gear assembly formed by assembling the first planetary gear and the second planetary gear into the gearbox, and make the second planetary carrier (31) abut against the internal structure of the gearbox through the third bearing (43).

2. The planetary gear assembly assembly process according to claim 1, characterized in that: Specifically, the S2 is to clamp the second gear ring (32) onto the annular groove (11) on the connecting plate (1), and then weld the second gear ring (32) to the connecting plate (1) in a horizontal welding manner.

3. The planetary gear assembly assembly process according to claim 2, characterized in that: The second gear ring (32) is interference fit with the annular groove (11).

4. The planetary gear assembly assembly process according to claim 2, characterized in that: The annular groove (11) is located at the outer edge of the connecting plate (1), and the width of the annular groove (11) matches the thickness of the second gear ring (32).

5. The planetary gear assembly assembly process according to claim 1, characterized in that: Specifically, the S6 is to insert the second planet carrier (31) into the first gear ring (22) along the axial direction, and the second planet carrier (31) is circumferentially limited with the first gear ring (22) by a rectangular tooth structure (51).

6. The planetary gear assembly assembly process according to claim 5, characterized in that: A clamping groove is provided on the rectangular tooth structure (51), a clamping spring (52) is provided in the clamping groove, and the clamping spring (52) abuts against the end surface of the second planet carrier (31) and is used to axially limit the second planet carrier (31).

7. The planetary gear assembly assembly process according to claim 1, characterized in that: Specifically, the S1 comprises a plurality of welding struts (211) uniformly arranged along the circumferential direction on the first planetary carrier (21), a welding hole (12) corresponding one-to-one to each welding strut (211) is provided on the connecting plate (1), the welding hole (12) and the welding strut (211) are plugged into each other, and then the welding hole (12) and the welding strut (211) are welded together by vertical welding.

8. The planetary gear assembly assembly process according to claim 7, characterized in that: The welding hole (12) and the welding support (211) are interference fit.

9. A gearbox, characterized in that: Use the planetary gear assembly assembly process according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising a gearbox as claimed in claim 9.

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