CN212690739U

CN212690739U - Differential mechanism with main reduction gear and differential mechanism shell reconstructed in light weight mode

Info

Publication number: CN212690739U
Application number: CN202020966910.6U
Authority: CN
Inventors: 潘晓东; 田原; 沈洪军
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-03-12
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses a differential mechanism of main reduction gear and differential mechanism casing lightweight reconsitution, include: the differential mechanism comprises a differential mechanism shell, a main reduction gear, a half axle gear, a planetary gear and a planetary gear shaft, wherein the half axle gear, the planetary gear and the planetary gear shaft are arranged in the differential mechanism shell; the differential shell is divided into a main shell and an end shell, the main reduction gear is provided with a rim ring, and the main reduction gear and the end shell are formed integrally by precision forging; the left end of the main shell and the right end of the end shell are respectively arranged on a left box body and a right box body of the gearbox through conical bearings, a right port of the main shell is in butt joint with a left port of the end shell, and a positioning spigot part is arranged at the butt joint part; the two half shaft gears are respectively positioned in the main shell and the end shell; and two ends of the planet gear shaft are respectively arranged on the inner wall of the main shell. The advantages are that: the mass of the differential assembly is obviously reduced; the processing and assembling efficiency is improved; the product performance is more stable.

Description

Differential mechanism with main reduction gear and differential mechanism shell reconstructed in light weight mode

Technical Field

The utility model relates to a differential mechanism, concretely relates to main reduction gear and differential mechanism casing lightweight reconstruction's differential mechanism belongs to automobile transmission system and makes technical field.

Background

In a conventional differential, the main components include a differential case, a final reduction gear, planetary gears and side gears, planetary gear spacers, side gear spacers, planetary gear shafts, and the like. The differential shell is of a cage type integral structure, and a left half shaft gear, a right half shaft gear, an upper planetary gear and a lower planetary gear are arranged in the differential shell. The left end and the right end of the differential shell are respectively provided with a conical bearing for mounting the differential shell on a front box body and a rear box body of a gearbox or a reduction box and enabling the differential assembly to rotate around the axial lead of the left conical bearing and the right conical bearing. And a connecting web plate is also arranged on the periphery of one end of the differential shell, and a plurality of threaded holes are formed in the web plate. The wheel rim of the main speed reducing gear of the differential has bolt through holes corresponding to the number and the positions of the connecting webs of the differential shell. The differential assembly utilizes a bolt to fixedly connect the rim ring of the main reduction gear with the web plate of the differential shell.

The above connection method has the following defects:

1. with bolted connections, loosening of one of the bolts, for example, will cause the entire differential assembly to fail;

2. the bolt connection is adopted, so that the processing cost is high, and the assembly cost is increased;

3. due to the superposition of the compound plates and the need of a plurality of bolts, the material consumption of the whole differential assembly is large, and the whole weight of the differential assembly is increased.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is mainly: the differential mechanism compound plate is connected with the main reduction gear rim ring in an overlapping mode and a plurality of bolts are arranged, so that the problems that the material consumption of the whole differential mechanism assembly is large and the whole weight is large are caused.

To the above problem, the utility model provides a technical scheme is:

light reconstruction of main reduction gear and differential shellThe differential of (2), comprising: the differential mechanism comprises a differential mechanism shell, a main reduction gear, a half axle gear, a planetary gear and a planetary gear shaft, wherein the half axle gear, the planetary gear and the planetary gear shaft are arranged in the differential mechanism shell; the differential housing is divided into a main housing and an end housing, the main reduction gear has a rim ring,the rim ring and the end shell of the main reduction gear are integrally formed by forging(ii) a The left end of the main shell and the right end of the end shell are respectively arranged on a left box body and a right box body of the gearbox through conical bearings, a right port of the main shell is in butt joint with a left port of the end shell, and a positioning component is arranged at the butt joint part; the two half shaft gears are respectively positioned in the main shell and the end shell, and the axial leads of the two half shaft gears are on the same straight line; the planetary gear shaft is arranged between the two half axle gears, the two ends of the planetary gear shaft are respectively arranged on the inner wall of the main shell, the axial lead of the planetary gear shaft is vertically intersected with the axial lead of the half axle gear, the planetary gear is arranged at the two ends of the planetary gear shaft, and the gear teeth of the two planetary gears are meshed with the gear teeth of the left half axle gear and the right half axle gear.

Further, the right port of the main housing has a port face expanding radially outward; correspondingly, the rim ring of the main reduction gear outside the left port of the end shell is also provided with a joint surface with the same shape surface as the shape surface of the port surface.

Further, the positioning component is a positioning pin for positioning and transmitting torque; the periphery of the port surface of the main shell is symmetrically provided with two flange flanges which are outward in the radial direction, and the flange flanges are provided with first axial positioning holes; correspondingly, two axial positioning holes II which are symmetrically arranged are formed in the rim ring outside the joint surface of the main reduction gear; after assembly, the two positioning holes I are respectively communicated with the corresponding positioning holes II, and the positioning pin is inserted into the communicated positioning holes I and positioning holes II.

Further, the port face of the main shell is symmetrically provided with two fixing pins protruding forwards in the axial direction, and a fixing pin hole capable of being inserted into the fixing pins is formed in the joint face of the main reduction gear.

Furthermore, a plurality of lightening holes are formed in the rim of the main reduction gear.

The utility model has the advantages that:

1. the differential assembly has the advantages that the connecting compound plate and the connecting bolts of a common structure are reduced, so that the mass of the differential assembly is obviously reduced;

2. the machining and mounting sizes (positioning aperture, positioning end face, bolt through hole, threaded hole and the like) required by the original main reduction gear and the differential shell are reduced, the production cost is reduced, and the machining and assembling efficiency is improved;

3. after the positioning hole is formed, the positioning pin is pressed in to transmit torque and position, and the failure risk that the main reduction gear cannot transmit torque due to loosening of the bolt is avoided.

Drawings

FIG. 1 is a cross-sectional view of a conventional differential construction;

FIG. 2 is an exploded cross-sectional view of the main reduction gear and differential case of an embodiment of a lightweight reconfiguration;

FIG. 3 is a right side view of the main housing according to one embodiment;

FIG. 4 is a schematic illustration of an assembly of the differential according to one embodiment;

FIG. 5 is a perspective view of the main reduction gear according to the first embodiment;

FIG. 6 is a schematic view of the main reduction gear and differential case being mounted in a transmission case for weight reduction of the reconstructed differential according to an embodiment;

FIG. 7 is a left side view of a main reduction gear provided with lightening holes according to an embodiment;

FIG. 8 is an exploded cross-sectional view of the main reduction gear and differential case of the second embodiment, illustrating a lightweight reconfiguration of the differential case;

in the figure: 1. a gearbox; 2. a differential housing; 21. a main housing; 211. a port face; 212. a first positioning hole; 213. a flange; 214. a fixing pin; 22. an end housing; 23. compounding a plate; 3. a main reduction gear; 31. a rim ring; 311. a binding face; 312. a second positioning hole; 313. a fixing pin hole; 4. a planetary gear; 5. a half shaft gear; 6. a planetary gear shaft; 7. a conical bearing; 8. a bolt; 9. positioning pins; 10. and (7) lightening holes.

Detailed Description

For a better understanding of the utility model, the following brief description of the structure of the conventional differential is as follows:

as shown in fig. 1, a conventional differential mainly includes: differential case 2, main reduction gear 3, planetary gear 4, side gear 5, planetary gear shaft 6. The differential case 2 is of a cage type integral structure, and the left and right side gears 5 and the upper and lower planetary gears 4 are installed in the differential case 2. The left end and the right end of the differential shell are respectively provided with a conical bearing 7 for installing the differential shell 2 on the gearbox 1 or a front box body and a rear box body of the reduction gearbox, and the differential assembly can rotate around the axial lead of the left conical bearing 7 and the right conical bearing 7. And a connecting compound plate 23 is also arranged on the periphery of one end of the differential shell, and a plurality of threaded holes are formed in the compound plate. The rim 31 of the main reducing gear of the differential is provided with bolt through holes corresponding to the number and the positions of the connecting compound plates of the differential shell. The differential assembly is fixedly connected with a rim ring 31 of the main reduction gear and a compound plate 23 of the differential shell by bolts 8.

The above-mentioned "left", "right", "upper" and "lower" are limited to the orientation shown in the drawings herein, and the practical application is not limited thereto, and the same shall apply hereinafter.

The invention is further described with reference to the following examples and figures.

Example one

As shown in fig. 2, 4 and 6, the differential with the main reduction gear and the differential case reconstructed in a light weight mode comprises the following components: the differential comprises a differential shell, a main reduction gear 3, a half axle gear 5, a planetary gear 4 and a planetary gear shaft, wherein the half axle gear 5, the planetary gear 4 and the planetary gear shaft are arranged in the differential shell, the differential shell is divided into a main shell 21 and an end shell 22, the main reduction gear 3 is provided with a rim 31, and the main reduction gear and the end shell are formed into a whole by precision forging; the left end of the main shell 21 and the right end of the end shell 22 are respectively arranged on a left box body and a right box body of the gearbox 1 through conical bearings 7, the right port of the main shell 21 is butted with the left port of the end shell 22, and a positioning component is arranged at the butted position; the main shell 21 and the end shell 22 can stably maintain integrity under working conditions under the constraint of the gearbox 1 box body and the positioning component; the two side gears 5 are respectively positioned in the main shell 21 and the end shell 22, and the axial leads of the two side gears 5 are on the same straight line; the planet gear shaft 6 is located between the two half axle gears 5, two ends of the planet gear shaft are respectively installed on the inner wall of the main shell 21, the axis of the planet gear shaft is vertically intersected with the axis of the half axle gear 5, the planet gear 4 is installed at two ends of the planet gear shaft 6, and the gear teeth of the two planet gears 4 are all meshed with the gear teeth of the left half axle gear and the right half axle gear. By the arrangement, connecting compound plates and a plurality of connecting bolts of the traditional differential are reduced, so that the quality of the differential assembly is obviously reduced, and the light weight of the product is realized; meanwhile, the required machining and mounting sizes are reduced, the production cost is reduced, the machining and assembling efficiency is improved, and the failure risk that the main reduction gear is loosened and cannot transmit torque due to the fact that bolts of a traditional differential are not screwed down is avoided.

Further improvements are as follows.

As shown in fig. 3 and 5, the right port of the main housing 21 has a port surface 211 expanding radially outward; correspondingly, the rim 31 of the main reduction gear outside the left port of the end housing 22 also has a contact surface 311 whose surface matches the surface of the port surface 211. This is intended to provide a smooth fit of the main housing 21 on the rim 31 of the main reduction gear.

As shown in fig. 2, 3 and 4, the positioning component is a positioning pin 9 for positioning and transmitting torque; two flange flanges 213 which are outward in the radial direction are symmetrically arranged on the periphery of the port surface 211 of the main shell 21, and an axial positioning hole I212 is arranged on the flange flanges 213; correspondingly, two axial positioning holes II 312 which are symmetrically arranged are formed in the rim 31 outside the abutting surface 311 of the main reduction gear; after assembly, the two positioning holes one 212 are respectively communicated with the corresponding positioning holes two 312, and the positioning pin 9 is inserted into the communicated positioning holes one 212 and two 312. The positioning pin 9 is press-fitted into the first positioning hole 212 and the second positioning hole 312 in an interference manner to prevent the main housing 21 from being loosened, so that the main housing 21 and the main reduction gear maintain stable integrity. Here, only two positioning pins 9 are needed, the volume of the flange 213 is small, and the positioning pins are provided with remarkable material saving and weight reduction effects compared with the traditional ten bolts 8 and heavy composite plates.

As shown in fig. 7, a plurality of lightening holes 10 are provided in the rim 31 of the main reduction gear 3. Obviously, this is also a further weight reduction measure.

Example two

As shown in fig. 8, a differential in which a final reduction gear and a differential case are reconfigured to be lightweight is different from the first embodiment in that two fixing pins 214 protruding forward in the axial direction for transmitting torque and positioning are symmetrically provided on a port surface 211 of a main case 21, and fixing pin holes 313 into which the fixing pins 214 can be inserted are provided on a contact surface 311 of the final reduction gear. The advantage is that the arrangement becomes more compact, the arrangement of the flange 213 and the first positioning hole 212 is omitted, and the fixing pin 214 is not loosened.

The above embodiments are only for the purpose of more clearly describing the invention and should not be considered as limiting the scope of protection covered by the invention, any modification of the equivalent should be considered as falling within the scope of protection covered by the invention.

Claims

1. A differential with reduced weight reconfiguration of the final drive gear and the differential case, comprising: differential housing, final reduction gear (3), install side gear (5), planetary gear (4), the planet gear axle in differential housing, its characterized in that: the differential shell is divided into a main shell body (21) and an end shell body (22), the main reduction gear (3) is provided with a rim ring (31), and the rim ring (31) of the main reduction gear (3) and the end shell body (22) are integrally formed by forging; the left end of the main shell (21) and the right end of the end shell (22) are respectively installed on a left box body and a right box body of the gearbox (1) through conical bearings (7), the right end opening of the main shell (21) is in butt joint with the left end opening of the end shell (22), and a positioning component is arranged at the butt joint position; the two side gears (5) are respectively positioned in the main shell (21) and the end shell (22), and the axial leads of the two side gears (5) are on the same straight line; the planet gear shaft (6) is positioned between the two half shaft gears (5), the two ends of the planet gear shaft are respectively installed on the inner wall of the main shell (21), the axial lead of the planet gear shaft is vertically intersected with the axial lead of the half shaft gears (5), the planet gear (4) is installed at the two ends of the planet gear shaft (6), and the gear teeth of the two planet gears (4) are all meshed with the gear teeth of the left half shaft gear and the right half shaft gear.

2. The differential of claim 1, wherein the main reduction gear and the differential case are lightweight and reconfigurable, and wherein: the right port of the main shell (21) is provided with a port surface (211) expanding outwards in the radial direction; correspondingly, the rim (31) of the main speed reduction gear outside the left port of the end shell (22) is also provided with a joint surface (311) with the same surface as that of the port surface (211).

3. The differential of claim 2, wherein the main reduction gear and the differential case are lightweight and reconfigurable, and further wherein: the positioning component is a positioning pin (9) for positioning and transmitting torque; two flange flanges (213) which are outward in the radial direction are symmetrically arranged on the periphery of a port surface (211) of the main shell (21), and a first axial positioning hole (212) is formed in each flange (213); correspondingly, two axial positioning holes II (312) which are symmetrically arranged are formed in the rim ring (31) outside the abutting surface (311) of the main reduction gear; after assembly, the two positioning holes I (212) are respectively communicated with the corresponding positioning holes II (312), and the positioning pin (9) is inserted into the communicated positioning holes I (212) and positioning holes II (312).

4. The differential of claim 2, wherein the main reduction gear and the differential case are lightweight and reconfigurable, and further wherein: the port face (211) of main casing body (21) is gone up the symmetry and is equipped with two axial forward protruding fixed pin (214), be equipped with on the binding face (311) of main reduction gear and insert fixed pin hole (313) of fixed pin (214).

5. The differential of any one of claims 1-4, wherein the main reduction gear and the differential case are formed by lightweight reconstruction, and wherein: and a plurality of lightening holes (10) are formed in a rim ring (31) of the end shell of the main reduction gear (3).