CN212155695U - Differential mechanism right side shell and inter-wheel differential mechanism assembly - Google Patents

Abstract

The utility model provides a differential mechanism right side shell and differential mechanism assembly between wheel, relate to a transaxle accessories, complete planetary gear installation sphere and four complete cross shaft holes have been seted up to differential mechanism right side shell on right shell shells inner wall, set up respectively along perpendicular to cross shaft hole direction on right shell shells inner wall and run through right shell casing and with the crossing perpendicular crossing stop screw hole in shaft hole, this stop screw hole uses rather than crossing cross shaft hole as the border, the one end that is close to right shell casing installation terminal surface is for the unthreaded hole that is used for passing stop screw, the other end of stop screw hole is for being used for the screw through-hole of being connected with stop screw. The inter-wheel differential assembly comprises a differential left shell, a half axle gear, a planetary gear, a cross shaft, a driven bevel gear and the differential right shell. The utility model discloses a spacing effect of cross axle is better, and operating condition is reliable and stable, still has that processing technology simplifies, maintenance man-hour is short, later stage maintenance is with low costs, overall structure is compact characteristics, easily uses widely.

Description

Differential mechanism right side shell and inter-wheel differential mechanism assembly

Technical Field

The utility model relates to a transaxle accessories, especially a differential mechanism right side shell and wheel differential mechanism assembly within a definite time.

Background

At present, the inter-wheel differential shell of a drive axle in the prior art is mostly composed of a left differential shell and a right differential shell, and a cross shaft is mostly integral. Generally, a half mounting spherical surface is provided on the inner wall of each differential case, and the mounting spherical surfaces of the spider and the planetary gear are respectively provided on the inner wall surfaces of the two differential case. In order to meet the requirements of installation and use, the requirements of concentricity of spherical surfaces of the two half shells, symmetry, coaxiality and the like of the cross-shaped shaft hole need to be effectively met, and therefore the spherical surface, the cross-shaped shaft hole and the like need to be machined and installed by a combined piece of the differential case assembly. The mode has complex processing technology, and the left shell and the right shell must be used in a matched mode, thereby increasing the cost of later-period maintenance.

In order to overcome the defects, the existing design also adopts a differential half-shell type with an integrated spherical surface, namely, a complete planet gear installation spherical surface and four complete cross shaft holes are arranged on the inner wall of one half-shell, and meanwhile, in order to ensure the installation of a cross shaft and a planet half shaft gear, a three-section cross shaft is usually adopted, namely, the cross shaft consists of a long shaft and two short shafts. In order to ensure that the shafts of the cross axle cannot move, the shafts are limited on a differential half shell by a positioning pin or a connecting bolt or the movement of the cross axle is limited by teeth directly. For example:

the utility model discloses a utility model patent with grant publication number CN203335772U discloses a differential mechanism for transaxle, fastens the connecting hole of differential mechanism left and right half shell, driven bevel gear together through single row connecting bolt. The overall strength requirement is considered, the specification of the connecting bolt is generally large, the wall of the integrated differential shell at the position of the connecting cross shaft is thin, and the overall strength is poor.

The utility model discloses a utility model patent that the publication number is CN202732879U discloses a differential mechanism cross axle structure, through the interior processing hole of cross axle, with the bolt with long, minor axis connection and fixed, owing to set up longer through-hole, have great influence to cross axle bulk strength.

The invention patent application with application publication number CN107939940A discloses an inter-wheel differential assembly, wherein a cross shaft structure is provided with a long shaft, a first planetary gear half shaft and a second planetary gear half shaft, the long shaft and two short shafts are integrally fixed by arranging a through hole and a blind hole structure, the cross shaft structure is only limited by the first short shaft cross shaft and is inserted into the short shaft and a differential shell positioning hole through a positioning pin, the cross shaft structure is complex and inconvenient to process, and meanwhile, the positioning pin is inconvenient to match, install, disassemble and maintain.

The invention patent application with application publication number CN109578558A discloses a firm-support and smooth-lubrication differential assembly, which is confined by a check bolt and penetrates through a differential shell, and is placed in blind holes of a long shaft and a short shaft of a cross shaft, and a square fixing sleeve is added.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the utility model provides a differential mechanism assembly between differential mechanism right side shell and wheel to overcome the unsatisfactory defect of current differential mechanism cross axle spacing effect, simultaneously under guaranteeing casing intensity, satisfy arrangement differential mechanism compact structure and lightweight demand.

The technical scheme for solving the technical problems is as follows: the utility model provides a differential mechanism right side shell, includes right side shell body, has seted up complete planetary gear installation sphere and four complete cross shaft holes on right side shell body inner wall, has seted up respectively along perpendicular to cross shaft hole direction on right side shell body inner wall and has run through right side shell body and with the crossing cross shaft hole vertically crossing spacing screw hole, this spacing screw hole uses rather than crossing cross shaft hole as the border, the unthreaded hole for being used for passing stop screw is close to the one end of right side shell body installation terminal surface, the other end of spacing screw hole is for being used for the screw through-hole be connected with stop screw.

The utility model discloses a further technical scheme is: the right shell is provided with four mounting bosses at the mounting position of the cross shaft, and the cross shaft hole and the limiting screw hole penetrate through the mounting bosses.

The utility model discloses a further technical scheme is: the limiting screw hole is also provided with a limiting step hole at one end face of the unthreaded hole.

The utility model discloses a further technical scheme is: and the right shell body is also provided with an excircle step for mounting the left shell of the differential and the driven gear.

The utility model discloses a further technical scheme is: and the right shell is also provided with an oil hole and an oil groove for lubrication.

The utility model discloses another technical scheme is: the utility model provides an inter-wheel differential assembly, includes differential left side shell, differential right side shell, side gear, planetary gear, cross axle, driven bevel gear, its characterized in that: the differential mechanism right side shell be foretell differential mechanism right side shell, the cross axle constitute by a cross axle major axis and two cross minor axes, it is downthehole at the cross axle of differential mechanism right side shell, and the cross axle has seted up stop screw installation through-hole at the stop screw hole position that corresponds the differential mechanism right side shell, stop screw passes the unthreaded hole of the stop screw hole of the differential mechanism right side shell, the stop screw installation through-hole of cross axle, the screw through-hole of the stop screw hole of the differential mechanism right side shell in proper order, with cross axle and differential mechanism right side shell fastening connection together.

The utility model discloses a further technical scheme is: the differential mechanism left side shell be provided with the installation tang, the differential mechanism left side shell is installed on the excircle step of differential mechanism right side shell through this installation tang to link together through fastener and differential mechanism right side shell.

The utility model discloses a further technical scheme is: the driven bevel gear is provided with an installation through hole matched with the outer circle step of the right differential shell, and the driven bevel gear is installed on the outer circle step of the right differential shell through the installation through hole.

The utility model discloses a further technical scheme is again: the differential left shell and the driven bevel gear are of a split structure or an integrated structure which are connected together through a connecting bolt.

Due to the adoption of the structure, the utility model discloses a differential mechanism assembly between differential mechanism right side shell and wheel compares with prior art, has following beneficial effect:

1. the cross shaft has good limiting effect

The utility model discloses a differential mechanism right side shell includes right shell casing, has seted up complete planetary gear installation sphere and four complete cross shaft holes on right shell shells inner wall, has seted up respectively along perpendicular to cross shaft hole direction on right shell shells inner wall and has run through right shell casing and with the crossing spacing screw hole of cross shaft hole vertically, this spacing screw hole uses rather than crossing cross shaft hole as the border, the one end that is close to right shell casing installation terminal surface is for being used for passing limit screw's unthreaded hole, the other end of spacing screw hole is for being used for the screw thread through-hole of being connected with limit screw. When the inter-wheel differential assembly is installed, the limiting screws sequentially penetrate through the unthreaded holes of the limiting screw holes of the right differential shell, the limiting screw installing through holes of the cross shaft and the threaded through holes of the limiting screw holes of the right differential shell, and the cross shaft and the right differential shell are tightly connected together. Because the utility model discloses a stop screw is in screw in differential mechanism right side shell again after passing the major axis of differential mechanism right side shell, cross axle, minor axis in proper order, and it is spacing that the major axis and the minor axis of giving the cross axle have all increased firm axial, and its spacing effect is better.

2. The working state of the cross shaft is stable and reliable

Because the utility model discloses because of there is the axial of the major axis that makes the cross and minor axis spacing firm of stop screw, its spacing effect is better, makes the operating condition of cross reliable and stable to avoided breaking the trouble and causing bigger loss because of the cross spills the outer part that differential mechanism brought.

3. The processing technology is simplified

Because the utility model discloses a differential mechanism right side shell includes right side shell body, has seted up complete planetary gear installation sphere and four complete cross shaft holes on right side shell shells inner wall, consequently, when processing planetary gear installation sphere and cross shaft hole, no longer need with differential mechanism left side shell and differential mechanism right side shell close piece processing and do and pair the sign, make processing technology can simplify.

4. Shortens the maintenance working hours and reduces the cost of later maintenance

Because the utility model discloses a differential mechanism right side shell includes right side shell body, has seted up complete planetary gear installation sphere and four complete cross shaft holes on right side shell shells inner wall, and the differential mechanism left and right shell need not to pair the use after the processing, and when half shell of one side took place the damage, the maintainer only need to damage half shell of one side change can, shortened man-hour greatly, reduced later stage maintenance's cost.

5. Compact overall structure

The utility model discloses an overall arrangement compact structure, the bulk rigidity is more excellent. Meanwhile, the tooth structure at the end part of the right shell of the differential can integrate the function of the meshing sleeve; the differential left shell and the driven gear can be made into an integrated structure, the structural strength is improved, the rigidity is improved, the gear tooth punching fault is reduced, and meanwhile, the heat treatment deformation and the weight reduction of the gear are reduced.

The technical features of the right differential case and the inter-wheel differential assembly according to the present invention will be further described with reference to the accompanying drawings and embodiments.

Drawings

FIG. 1: example a front cross-sectional view of the right differential case,

FIG. 2: example a schematic perspective view of the right differential case,

FIG. 3: second embodiment of the schematic perspective view of the right differential case (viewed from another direction),

FIG. 4: second embodiment a front cross-sectional view of an inter-wheel differential assembly,

FIG. 5: example two a schematic view of the structure of the long axis of the cross,

FIG. 6: example two the short axis of the cross shaft is shown schematically,

in the above drawings, the respective reference numerals are explained as follows:

1-a left shell of the differential mechanism,

2-a right differential shell, 20-a right differential shell, 201-a planet gear installation spherical surface, 202-a cross axle hole,

203-limit screw hole, 2031-smooth hole, 2032-threaded through hole, 2033-limit step hole,

204-excircle step, 205-oil hole, 206-oil groove, 207-mounting boss, 208-right end tooth, 209-limit screw,

3-side gear, 301-side gear spacer, 4-planetary gear, 401-planetary gear spacer,

5-cross shaft, 501-long shaft, 502-short shaft, 6-driven bevel gear, 7-differential right bearing, 8-differential left bearing,

9-main bevel gear, 10-guide bearing.

Detailed Description

The first embodiment is as follows:

the utility model provides a differential mechanism right side shell, includes right side shell 20, has seted up complete planetary gear installation sphere 201 and four complete cross shaft holes 202 on right side shell 20 inner wall, wherein the nodical coincidence of the centre of sphere of cross shaft hole 202 central line and planetary gear installation sphere 201 to guarantee the installation of syllogic cross, be provided with four installation bosss 207 of being convenient for the operation simultaneously in cross mounting position, cross shaft hole 202 run through this installation boss 207. A through limiting screw hole 203 which penetrates through the right shell 20 and is vertically intersected with the cross-shaped shaft hole 202 is respectively arranged on the inner wall of the right shell 20 along the direction vertical to the cross-shaped shaft hole 202, and the limiting screw hole 203 also penetrates through the mounting boss 207; the limiting screw hole 203 is bounded by the crossed shaft hole 202 intersected with the limiting screw hole, one end close to the mounting end surface of the right shell body is an unthreaded hole 2031 for passing through the limiting screw, and the other end of the limiting screw hole 203 is a threaded through hole 2032 for being connected with the limiting screw; and the limit screw hole 203 is further provided with a limit step hole 2033 at an end face of one end of the unthreaded hole 2031 thereof. The right housing 20 is further provided with an outer circular step 204 for mounting a left housing and a driven gear of the differential, and is further provided with an oil hole 205 and an oil groove 206 for lubrication. The right end teeth 208 of the right housing of the present differential may be integrated into the meshing sleeve function.

The utility model discloses an aspect no longer need close the piece with differential mechanism shell and process and do the sign of pairing when processing differential mechanism shell's installation sphere and cross shaft hole, and processing technology can be simplified, and the differential mechanism left and right half shell need not to pair the use after the simultaneous processing, and when half shell of one side takes place the damage, the maintenance person only need to damage half shell of one side change can, shortened man-hour greatly, reduced the cost of later stage maintenance. On the other hand, four limiting screw holes are formed in the right differential shell, the cross shaft is limited through limiting screw connection, and the arrangement structure is compact in installation and disassembly.

Example two:

an inter-wheel differential assembly comprises a differential left shell 1, a differential right shell 2, a half axle gear 3, a planetary gear 4, a cross shaft 5, a driven bevel gear 6, a differential right bearing 7 and a differential left bearing 8. The differential right case 2 is the differential right case described in the first embodiment, that is: this differential right side shell 2 includes right side shell 20, has seted up complete planetary gear installation sphere 201 and four complete cross shaft holes 202 on right side shell 20 inner wall to guarantee the installation of syllogic cross axle, be provided with four installation bosss 207 simultaneously in cross axle mounted position, cross shaft hole 202 run through this installation boss 207. A limiting screw hole 203 which penetrates through the right shell 20 and is vertically intersected with the cross shaft hole 202 is respectively arranged on the inner wall of the right shell 20 along the direction vertical to the cross shaft hole 202, and the limiting screw hole 203 also penetrates through the mounting boss 207; the limiting screw hole 203 is bounded by the crossed shaft hole 202 intersected with the limiting screw hole, one end close to the mounting end surface of the right shell body is an unthreaded hole 2031 for passing through the limiting screw, and the other end of the limiting screw hole 203 is a threaded through hole 2032 for being connected with the limiting screw; and the limit screw hole 203 is further provided with a limit step hole 2033 at an end face of one end of the unthreaded hole 2031 thereof. The right housing 20 is further provided with an outer circular step 204 for mounting a left housing and a driven gear of the differential, and is further provided with an oil hole 205 and an oil groove 206 for lubrication.

The differential left shell 1 is provided with an installation seam allowance, the differential left shell 1 is installed on an excircle step 204 of the differential right shell 2 through the installation seam allowance, and is connected with the differential right shell 2 through a fastener connecting screw.

The side gear 3 and the planet gear 4 are arranged between the differential left shell 1 and the differential right shell 2, a side gear gasket 301 is arranged between the differential left shell 1 and the differential right shell 2 and between the differential right shell 2 and the side gear 3 in a padding mode, and a planet gear gasket 401 is arranged between the differential right shell 2 and the planet gear 4 in a padding mode.

The cross shaft 5 consists of a long shaft 501 and two collinear short shafts 502 which are vertically connected with the long shaft; this cross 5 is installed in the cross shaft hole 202 in differential mechanism right side shell 2, and cross 5 has seted up stop screw installation through-hole in the stop screw hole 203 position that corresponds differential mechanism right side shell 2, stop screw 209 passes unthreaded hole 2031 of the stop screw hole 203 of differential mechanism right side shell 2, the stop screw installation through-hole of cross, the screw through-hole 2032 of the stop screw hole 203 of differential mechanism right side shell 2 in proper order, with cross 5 and differential mechanism right side shell 2 fastening connection together, this stop screw 209 adopts the countersunk screw.

The driven bevel gear 6 is provided with an installation through hole matched with the outer circular step of the right differential case 2, and the driven bevel gear 6 is installed on the outer circular step 204 of the right differential case 2 through the installation through hole. The differential left shell 1 and the driven bevel gear 6 are of split structures and are connected together through connecting bolts.

The differential left bearing 7 and the differential right bearing 8 are respectively arranged on the bearing mounting positions of the differential left shell 1 and the differential right shell 2. In addition, a guide bearing 10 is arranged at the bottom of an external main bevel gear 9 of the inter-wheel differential assembly, and the installation space of the guide bearing 10 is ensured by the structure of the differential right shell 2.

As an alternative to the second embodiment, the differential left housing 1 and the driven bevel gear 6 may be an integral structure. The differential left shell 1, the differential right shell 2 and the driven bevel gear 6 are connected through only a single row of bolts, so that the types of parts can be reduced, the structural strength is improved, the rigidity is improved, the gear tooth punching fault is reduced, and the heat treatment deformation and weight reduction of the gear are reduced.

When the wheel differential assembly works, the wheel differential assembly is assembled on a main speed reducer of a drive axle through a differential left bearing 7 and a differential right bearing 8, after the drive axle is loaded, sufficient gear oil can be filled in the main speed reducer, and the gear oil flows into the wheel differential assembly through oil holes which are formed in the shell of the differential left shell 1 and the shell of the differential right shell 2 and are communicated with each other inside and outside so as to lubricate relative rotating parts inside and outside. When the vehicle runs, the driven bevel gear drives the differential assembly to integrally rotate on the differential left bearing 7 and the differential right bearing 8 due to the torque transmitted from the vehicle input end and the driving bevel gear, the differential assembly transmits the transmission torque to the half axle gear 3 through the cross shaft and the 4 planetary gears 4 arranged on the cross shaft, and transmits the torque and the rotating speed to the wheels on the left side and the right side through the left half shaft and the right half shaft arranged on the cross shaft respectively, so that the working process of a transmission system is realized.

When the rotating speeds of the left wheel and the right wheel of the vehicle are completely the same, the differential assembly rotates integrally, the rotating speeds of the two half-axle gears 3 and the differential shell are the same, no relative rotation exists between the two half-axle gears, at the moment, the planet gear 4 is relatively static on the cross shaft, and the two half-axle gears also do not rotate relatively; when the vehicle turns so that the left wheel and the right wheel have speed difference, the 4 planetary gears 4 revolve along the whole differential assembly and are also transmitted on the cross shafts, the left half shaft gear 3 and the right half shaft gear 3 rotate relative to the differential shell, and the relative rotation speed difference is caused between the left half shaft gear and the right half shaft gear and the differential shell due to the meshing relationship between the left half shaft gear and the right half shaft gear and the planetary gears 4, namely, the differential operation of the differential is carried out. The existence of the limit screw 209 ensures that the long shaft 501 and the short shaft 502 of the cross shaft are axially and firmly limited, so that the working state of the cross shaft is stable and reliable, and the larger loss caused by the breaking failure of the outer part due to the cross shaft escaping out of the differential is avoided.

Claims (9)

1. The utility model provides a differential mechanism right side shell, includes right side shell casing (20), has seted up complete planetary gear installation sphere (201) and four complete cross shaft holes (202) on right side shell casing (20) inner wall, its characterized in that: and a limiting screw hole (203) which penetrates through the right shell (20) and is vertically crossed with the cross shaft hole (202) is respectively formed in the inner wall of the right shell (20) along the direction vertical to the cross shaft hole (202), the limiting screw hole (203) is bounded by the cross shaft hole (202) crossed with the limiting screw hole, one end close to the mounting end surface of the right shell is a unthreaded hole (2031) for penetrating through a limiting screw, and the other end of the limiting screw hole (203) is a threaded through hole (2032) for being connected with the limiting screw.

2. The right differential case of claim 1, wherein: the right shell (20) is provided with four mounting bosses (207) at the cross shaft mounting position, and the cross shaft hole (202) and the limiting screw hole (203) penetrate through the mounting bosses (207).

3. The right differential case of claim 1, wherein: the limiting screw hole (203) is also provided with a limiting step hole (2033) on the end face of one end of the unthreaded hole (2031).

4. The right differential case of claim 1, wherein: and an outer circle step (204) for mounting a left differential shell and a driven gear is further processed on the right shell (20).

5. The right differential case of claim 1, wherein: the right shell (20) is also provided with an oil hole (205) and an oil groove (206) for lubrication.

6. The utility model provides an inter-wheel differential assembly, includes differential left side shell (1), differential right side shell (2), side gear (3), planetary gear (4), cross axle (5), driven bevel gear (6), its characterized in that: the right differential case (2) is as claimed in any one of claims 1 to 5, the cross shaft (5) is composed of a cross shaft long shaft (501) and two cross short shafts (502), the cross shaft (5) is installed in a cross shaft hole (202) in the right differential case (2), a limiting screw installing through hole is formed in the position, corresponding to the limiting screw hole (203) of the right differential case (2), of the cross shaft (5), the limiting screw (209) sequentially penetrates through an unthreaded hole (2031) of the limiting screw hole (203) of the right differential case (2), the limiting screw installing through hole of the cross shaft, and a threaded through hole (2032) of the limiting screw hole (203) of the right differential case (2), and the cross shaft (5) and the right differential case (2) are fastened and connected together.

7. The inter-wheel differential assembly according to claim 6, wherein: the differential mechanism left side shell (1) be provided with the installation tang, differential mechanism left side shell (1) is installed on excircle step (204) of differential mechanism right side shell (2) through this installation tang to link together through fastener and differential mechanism right side shell (2).

8. The inter-wheel differential assembly according to claim 7, wherein: the driven bevel gear (6) is provided with an installation through hole matched with the outer circle step of the right differential shell (2), and the driven bevel gear (6) is installed on the outer circle step (204) of the right differential shell (2) through the installation through hole.

9. The inter-wheel differential assembly according to claim 6, 7 or 8, wherein: the differential left shell (1) and the driven bevel gear (6) are of a split structure or an integrated structure which are connected together through connecting bolts.

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