CN212377235U

CN212377235U - Main gear and differential shell integrated welding differential mechanism

Info

Publication number: CN212377235U
Application number: CN202020505587.2U
Authority: CN
Inventors: 林志鸿; 杨洋; 刘俊
Original assignee: Changshu Meiqiao Automotive Drive System Manufacturing Technology Co ltd
Current assignee: Changshu Meiqiao Automotive Drive System Manufacturing Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2021-01-19
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a main gear and poor shell integrated form welding differential mechanism that subtracts relates to automobile spare part assembly technical field, aims at solving when the product needs satisfy high moment of torsion, and often the differential mechanism volume can be bigger, subtracts gear and poor shell welded connection's design at the owner, and the welding diameter also produces direct influence to product torque capacity, can't realize at present the problem that small and moment of torsion large capacity coexist. The key point of the technical scheme is that the differential gear box comprises a differential shell and a rotating gear set, wherein the differential shell comprises a shell and a main reduction gear integrated with the shell, a differential shell end cover is welded at one end of the differential shell in the radial direction, and a yielding hole for placing the rotating gear set is formed in the end face of the differential shell. The differential shell and the main reduction gear are integrally produced during forging, so that later-stage bolt connection or laser welding of the existing main reduction gear and the differential shell is avoided, and the differential shell end cover are radially welded, so that the rigidity of the differential is effectively increased, and the differential can have stronger torque capacity under smaller volume.

Description

Main gear and differential shell integrated welding differential mechanism

Technical Field

The utility model belongs to the technical field of the technique of automobile spare and accessory part assembly and specifically relates to a main gear and poor shell integrated form welding differential mechanism that subtracts.

Background

The differential is an important and indispensable part of an automobile transmission system and is one of key factors influencing the service life of the whole gearbox and the noise. In the current market, a differential and a main reduction gear are designed in a split mode, wherein two connection modes of laser welding and main body bolting are adopted for the main reduction gear and a differential shell (hereinafter referred to as a differential shell).

The differential shell has a structure of a one-piece window and a two-piece split body. Referring to fig. 1 and 2, the differential case is a one-piece type windowed differential case, two windows 11 are symmetrically arranged on the differential case 1, and because the differential case 1 is of an integral structure, a planetary gear and a side gear of a differential mechanism are required to be installed in the differential case 1 through the windows 11. The planet shaft, which is in rotational engagement with the planet gear, can only be fixed in the mounting through hole 12 between the two windows 11. The size of the window 11 is large so that the strength of the inferior shell 1 is not high.

The above prior art solutions have the following drawbacks: in the connection mode of the differential and the main reduction gear, the torque capacity of the differential is in a direct proportion with the volume of the differential. When a product needs to meet high torque, the volume of the differential is often large, and the product envelope is a great challenge. In the design of the welded connection of the main reduction gear and the differential case, the welding diameter also has a direct influence on the torque capacity of the product. In the current market, products with small volume and large torque capacity cannot be found, so further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a main gear and poor shell integrated form welding differential that subtracts, it has the effect of welding strength is strengthened to relative small and moment of torsion capacious, radial welding.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a main reduction gear and poor shell integrated form welding differential, includes poor shell and sets up the rotation gear train in poor shell, poor shell include the casing and with the integrative integrated main reduction gear of casing, the radial welding of one end of poor shell has the poor shell end cover, set up the hole of stepping down that supplies rotation gear train to place on the terminal surface relative with the poor shell end cover of poor shell.

The utility model discloses further set up to: and the end face of the differential shell end cover opposite to the differential shell is provided with a first annular welding groove with a triangular cross section, and the end face of the differential shell opposite to the differential shell end cover is provided with a second annular welding groove corresponding to the first annular welding groove.

The utility model discloses further set up to: the end face, opposite to the differential shell, of the differential shell end cover is coaxially provided with a connecting ring, the outer diameter of the connecting ring is smaller than that of the end face of the differential shell end cover, and the outer diameter of the connecting ring is equal to the inner diameter of the yielding hole.

The utility model discloses further set up to: the rotating gear set comprises a plurality of differential gear main gears and side gears meshed with the differential gear main gears, and the differential gear main gears are evenly distributed along the circumferential direction of the differential shell at equal intervals.

The utility model discloses further set up to: the differential mechanism main gear is provided with two, the side gear is provided with two, two differential mechanism main gear intermediate junction has the gear shaft.

The utility model discloses further set up to: and the circumferential side surface of the connecting ring is provided with a through hole for the gear shaft to pass through.

To sum up, the utility model discloses a beneficial technological effect does:

1. through the arrangement of the differential shell with the main reducing gear, the differential shell and the main reducing gear are integrally produced during forging, so that the later bolt connection or laser welding of the main reducing gear and the differential shell in the current market is omitted, and the consideration of whether the welding meets the strength requirement is eliminated; the differential case and the differential case end cover are radially welded, compared with axial welding, the radial welding is higher in strength and stability, the rigidity of the differential is effectively improved, and the differential can have higher torque capacity under the condition of smaller volume;

2. through the setting of annular welding groove one and annular welding groove two, increase tin liquor and poor shell and the area of contact of poor shell end cover, further improve welded intensity.

Drawings

FIG. 1 is a first schematic view of a one-piece windowed differential case of the background art;

FIG. 2 is a schematic structural diagram of a one-piece windowed differential case in the background art;

FIG. 3 is a schematic view of an assembly structure of a differential assembly according to an embodiment of the present invention;

FIG. 4 is an exploded view of various components in an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view for showing an assembled structure;

fig. 6 is an enlarged schematic view of a portion a in fig. 5.

In the figure, 1, poor shell; 11. a window; 12. mounting a through hole; 13. a hole of abdication; 2. a differential shell end cover; 3. a first annular welding groove; 4. a second annular welding groove; 5. a connecting ring; 51. a through hole; 6. a differential main gear;

61. a side gear; 62. a gear shaft.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 3 and 4, for the utility model discloses a main gear and poor shell integrated form welding differential that subtracts, including poor shell 1 and set up the running gear group in poor shell 1, poor shell 1 includes the casing and subtracts the gear with the integrative main of casing, and the radial welding of one end of poor shell 1 has poor shell end cover 2, offers the hole of stepping down 13 that supplies running gear group to place on the terminal surface that poor shell 1 is relative with poor shell end cover 2. The differential shell and the main reduction gear are integrally produced during forging, so that the later-stage bolt connection or laser welding of the main reduction gear and the differential shell in the current market is omitted, and the consideration of whether the welding meets the strength requirement is eliminated; and then the differential case 1 and the differential case end cover 2 are radially welded, compared with axial welding, the radial welding has higher strength and stability, and the rigidity of the differential is effectively increased, so that the differential has stronger torque capacity under smaller volume.

Referring to fig. 5 and 6, in order to further improve the welding strength between the differential case 1 and the differential case end cap 2, an annular welding groove i 3 with a triangular cross section is formed in the end surface of the differential case end cap 2 opposite to the differential case 1, and an annular welding groove ii 4 corresponding to the annular welding groove i 3 is formed in the end surface of the differential case 1 opposite to the differential case end cap 2. The contact area of the tin liquid with the differential case 1 and the differential case end cover 2 is increased, and the welding strength is further improved.

Referring to fig. 4 and 5, the end face of the differential case end cover 2 opposite to the differential case 1 is coaxially provided with a connecting ring 5, the outer diameter of the connecting ring 5 is smaller than the outer diameter of the end face of the differential case end cover 2, and the outer diameter of the connecting ring 5 is equal to the inner diameter of the abdicating hole 13. In this embodiment, the rotating gear set includes two differential main gears 6 and a side gear 61 engaged with the differential main gears 6, and the two differential main gears 6 are uniformly distributed at equal intervals along the circumferential direction of the differential case 1. Two side gears 61 are provided correspondingly, and a gear shaft 62 is connected between the two differential main gears 6. The circumferential side surface of the connecting ring 5 is provided with a through hole 51 for the gear shaft 62 to pass through. After the rotating gear is assembled into the differential case end cover 2, the differential case end cover 2 and the differential case 1 are welded. The two-piece design can reduce the axial envelope of the product and facilitate product placement. The design successfully avoids the process that the gear grinding needs to be carried out after welding in the traditional design for realizing high precision of the gear and deformation of laser welding. The assembly of the internal components of the differential can be a significant challenge if it is to follow a weld-then-grind manufacturing process. The integrated main reduction gear greatly simplifies the assembly of internal parts of the differential while considering the precision of the gear.

The implementation principle of the embodiment is as follows: the differential shell and the main reduction gear are integrally produced during forging, so that the later-stage bolt connection or laser welding of the main reduction gear and the differential shell in the current market is omitted, and the consideration of whether the welding meets the strength requirement is eliminated;

after the rotating gear is assembled into the differential case end cover 2, the assembly of the small assembly is completed, and then the assembled small assembly of the differential case end cover 2 and the differential case 1 are subjected to radial laser welding to complete the manufacture of the differential assembly. The differential can be realized to greatly improve the torque capacity while having relatively small volume. The welding of the differential shell end cover 2 to the differential shell 1 simplifies the design of the tool, can realize radial welding and enhances the welding strength.

The traditional process of welding before grinding the gear limits the assembly of internal parts of the differential assembly and has the risk of interference. The two-piece shell reduces the assembly difficulty of internal parts of the differential, can avoid the process of welding and then grinding the gear, and does not need to consider the welding deformation, thereby improving the precision of the gear.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a main gear that subtracts and poor shell integrated form welding differential, includes poor shell (1) and sets up the rotating gear group in poor shell (1), its characterized in that: poor shell (1) include the casing and subtract the gear with the integrative main of casing integration, the radial welding of one end of poor shell (1) has poor shell end cover (2), set up the hole of stepping down (13) that supplies the rotating gear group to place on the relative terminal surface of poor shell (1) and poor shell end cover (2).

2. The main reduction gear and differential case integrated weld differential of claim 1, wherein: and the end face of the differential shell end cover (2) opposite to the differential shell (1) is provided with a first annular welding groove (3) with a triangular cross section, and the end face of the differential shell (1) opposite to the differential shell end cover (2) is provided with a second annular welding groove (4) corresponding to the first annular welding groove (3).

3. The main reduction gear and differential case integrated weld differential of claim 1, wherein: poor shell end cover (2) and the relative terminal surface of poor shell (1) on coaxial go-between (5) of being provided with, the external diameter of go-between (5) is less than the external diameter of poor shell end cover (2) terminal surface, the external diameter of go-between (5) equals the internal diameter of hole of stepping down (13).

4. A main reduction gear and differential case integrated weld differential as claimed in claim 3, wherein: the rotating gear set comprises a plurality of differential main gears (6) and side gears (61) meshed with the differential main gears (6), and the differential main gears (6) are evenly distributed along the circumferential equidistant interval of the differential shell (1).

5. The main reduction gear and differential case integrated weld differential of claim 4, wherein: the differential mechanism main gear (6) is provided with two, the side gears (61) are provided with two, and a gear shaft (62) is connected between the two differential mechanism main gears (6).

6. The main reduction gear and differential case integrated weld differential of claim 5, wherein: the circumferential side surface of the connecting ring (5) is provided with a through hole (51) for the gear shaft (62) to pass through.