CN210034327U - Differential mechanism structure of automobile front-drive transmission - Google Patents
Differential mechanism structure of automobile front-drive transmission Download PDFInfo
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- CN210034327U CN210034327U CN201920043944.5U CN201920043944U CN210034327U CN 210034327 U CN210034327 U CN 210034327U CN 201920043944 U CN201920043944 U CN 201920043944U CN 210034327 U CN210034327 U CN 210034327U
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Abstract
A differential mechanism structure of an automobile front-drive transmission is characterized in that opposite ends of a differential mechanism shell and a shell end cover are respectively provided with an assembly limiting flange, a main reduction gear is sleeved on the excircle of the assembly limiting flange of the differential mechanism shell cover and is clamped between the differential mechanism shell and the differential mechanism shell cover, two half-shaft bevel gears are symmetrically arranged in a gear mechanism mounting cavity, a shell wall of the differential mechanism shell is equally provided with four radial through holes at 360 degrees, and the planetary gear shaft is a cross shaft formed by a long shaft and two short shafts, two ends of the long shaft are respectively in clearance fit with two opposite radial through holes on the differential shell, one ends of the two short shafts are axially and symmetrically connected to the long shaft, the other ends of the two short shafts are respectively in clearance fit with the other two radial through holes on the differential shell, and the four planetary bevel gears are respectively in clearance fit with four ends of the cross shaft and are meshed with the two half shaft bevel gears in a manner of cogged mode.
Description
Technical Field
The utility model relates to a differential mechanism field, in particular to differential mechanism structure of car forerunner's derailleur.
Background
Generally, a front engine compartment of a front-wheel drive automobile is provided with a plurality of components, such as an engine, a transmission and the like, so that the design space of the components is limited, and the power transmission components are required to have firm bearing capacity, can effectively transmit power, and have compact structure and reasonable arrangement as much as possible. As a front-wheel drive transmission of a front-wheel drive automobile, a differential mechanism structure needs to be integrally assembled inside a front-wheel drive transmission shell, the existing differential mechanism structure is large in size or unreasonable in structure, and because a planetary gear shaft adopted in the existing differential mechanism is usually provided with four radially extending shafts on an integrally formed central body, the four planetary gears are respectively supported on the planetary gear shaft, when the front-wheel drive transmission is assembled inside the transmission shell, the assembling process is complex, the mounting operation is not facilitated, the design improvement for reducing the size of the front-wheel drive transmission is seriously influenced, and the development of the front-wheel drive automobile is not facilitated.
Disclosure of Invention
The utility model aims at providing a differential mechanism structure of car forerunner's derailleur to the not enough that prior art exists, it both can improve differential mechanism's bearing capacity, reduces differential mechanism and arranges the space, makes differential mechanism structure compacter, makes the rapid convenience of erection joint again.
The purpose of the utility model is realized like this: a differential mechanism structure of an automobile front-drive transmission comprises a differential mechanism shell, a differential mechanism shell cover, four planetary bevel gears, two half-shaft bevel gears and planetary gear shafts, wherein opposite ends of the differential mechanism shell and the differential mechanism shell cover are respectively provided with an extending section for mounting a bearing, the extending sections of the mounting bearings of the differential mechanism shell and the differential mechanism shell cover are respectively provided with an axial through hole, opposite ends of the differential mechanism shell and the differential mechanism shell cover are respectively provided with an assembling limiting flange, the inner circumference wall of the assembling limiting flange of the differential mechanism shell cover is in clearance fit with the outer circumference wall of the assembling limiting flange of the differential mechanism shell, a gear mechanism mounting cavity is formed between the differential mechanism shell and the differential mechanism shell cover, a main speed reduction gear is sleeved on the outer circumference of the assembling limiting flange of the differential mechanism shell cover and is clamped between the differential mechanism shell and the, The main reduction gear and the differential shell are fixedly connected together, two half shaft bevel gears are symmetrically arranged in the gear mechanism mounting cavity, a left half shaft bevel gear can be rotatably supported in the differential shell, a right half shaft gear can be rotatably supported in the differential shell cover, the shell wall of the differential shell is equally divided into 360 degrees and provided with four radial through holes, pin holes transversely penetrating through the radial through holes are arranged at positions corresponding to the radial through holes, the planetary gear shaft is composed of a long shaft and two short shafts to form a cross shaft, two ends of the long shaft are respectively in clearance fit with the two opposite radial through holes on the differential shell, the long shaft is fixed through fixing pins inserted from the pin holes, one ends of the two short shafts are axially symmetrically connected to the long shaft, the other ends of the two short shafts are respectively in clearance fit with the radial through holes vertical to the long shaft, the four planetary bevel gears are respectively in clearance fit with the four ends of the cross shaft and are in cogged engagement with the two half shaft bevel gears.
The middle of the shaft section of the long shaft is radially provided with a through hole, one end of the short shaft is provided with a shaft neck, and the shaft necks of the two short shafts are inserted into the through hole of the long shaft to form clearance fit.
And pin holes for the fixing pins to pass through are formed in the long shaft and the short shaft.
The pin hole of differential mechanism casing is the shoulder hole, and the big footpath end of this shoulder hole is used for the fixed pin spacing towards differential mechanism casing lid, the hole shoulder of shoulder hole.
The differential case covers the mounting position that the axle head face of assembly limit flange corresponds the fixed pin, and differential case covers and main reduction gear, differential case fixed connection back, forms the stopping spacing to the fixed pin through the assembly limit flange that differential case covered.
By adopting the scheme, the opposite ends of the differential case and the differential case cover are respectively provided with the assembly limit flanges, wherein the inner circumferential walls of the assembly limit flanges of the differential case cover are in clearance fit with the outer circumferential walls of the assembly limit flanges of the differential case, so that a gear mechanism mounting cavity is formed between the differential case and the differential case cover, a main reduction gear is sleeved on the outer circumferences of the assembly limit flanges of the differential case cover and is clamped between the differential case and the differential case cover, the main reduction gear and the differential case are fixedly connected together through bolts. The differential mechanism comprises a differential mechanism shell, a planetary gear shaft, a plurality of fixing pins and a plurality of planetary bevel gears, wherein the differential mechanism shell is provided with a plurality of radial through holes, the planetary gear shaft is provided with a cross shaft by uniformly dividing 360 degrees on the shell wall of the differential mechanism shell, the positions corresponding to the radial through holes are provided with pin holes which transversely penetrate through the radial through holes, the planetary gear shaft is provided with a long shaft and two short shafts to form the cross shaft, two ends of the long shaft are respectively in clearance fit with the two opposite radial through holes on the differential mechanism shell, the long shaft is fixed by the fixing pins inserted from the pin holes, one ends of the two short shafts are axially and symmetrically connected to the long shaft, the other ends of the two short. The structure enables the assembly of the differential mechanism structure to be more convenient and easier compared with the prior art, can improve the bearing capacity of the differential mechanism, and can reduce the arrangement space when designing a large-torque transmission.
And a through hole is radially arranged in the middle of the shaft section of the long shaft, a shaft neck is arranged at one end of the short shaft, and the shaft necks of the two short shafts are inserted into the through hole of the long shaft to form clearance fit. The cross shaft is beneficial to assembling the planet gear shafts and the four planet bevel gears in the differential shell, is also beneficial to assembling, combining and disassembling the cross shaft, provides great convenience for assembling the differential, and can greatly reduce the labor intensity of workers.
And pin holes for the fixing pins to pass through are formed in the long shaft and the short shaft. And the pin hole of the differential case is a stepped hole, the large-diameter end of the stepped hole faces the differential case cover, and the hole shoulder of the stepped hole is used for limiting by a fixing pin. And the shaft end surface of the differential case cover provided with the assembly limit flange corresponds to the mounting position of the fixing pin, and after the differential case cover is fixedly connected with the main reduction gear and the differential case, the fixing pin is limited in a stopping way through the assembly limit flange on the differential case cover. After the four planetary bevel gears are placed in the cavity of the differential case, the long shafts penetrate through the radial through holes of the differential case and the opposite planetary bevel gears to form clearance fit, the short shafts penetrate through the other radial through holes and the planetary bevel gears respectively to be connected with the short shafts, then the long shafts and the short shafts are inserted into pin holes of the differential case and the long shafts or pin holes of the differential case and the short shafts respectively to be fixed with the differential case, one ends of the fixing pins are limited on the hole shoulders of the stepped holes, and the other ends of the fixing pins are limited by the assembling limiting flanges on the differential case cover to prevent the fixing pins from falling off. The process of assembling the differential mechanism in the transmission is simple, convenient and firm, and the differential mechanism is also favorable for disassembly.
The invention will be further explained with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the differential case cover, the main reduction gear, and the differential case of the present invention assembled and fixed;
FIG. 3 is a schematic structural view of a planetary gear shaft;
FIG. 4 is a schematic assembly view of the bevel planet gears;
FIG. 5 is a schematic view of the meshing of the planetary bevel gears and the half shaft bevel gears.
In the drawing, 1 is a half shaft bevel gear, 2 is a differential case, 3 is a fixing pin, 4 is a short shaft, 5 is a differential case cover, 6 is a main reduction gear, 7 is a planetary bevel gear, 8 is a long shaft, and 9 is a bolt.
Detailed Description
Referring to fig. 1 to 5, an embodiment of a differential structure of a front drive transmission of an automobile includes a differential case 2, a differential case cover 5, four planetary bevel gears 7, two side bevel gears 1 and planetary gear shafts, and a final reduction gear 6. The opposite ends of the differential case 2 and the differential case cover 5 are respectively provided with an extension section for mounting a bearing, so that the differential can be supported in the transmission case body through the bearing. The differential mechanism comprises a differential mechanism shell 2, a differential mechanism shell cover 5, a main speed reduction gear 6, a bolt 9, a gear mechanism mounting cavity, a main speed reduction gear 6, a differential mechanism shell 2 and a main speed reduction gear 6, wherein the differential mechanism shell 2 and the differential mechanism shell cover 5 are fixedly connected together through the bolt 9. Two semi-axis bevel gear 1 symmetries are installed in the gear mechanism installation cavity, left side semi-axis bevel gear rotatable support is in differential mechanism casing 2, and right side semi-axis gear rotatable support is in differential mechanism casing lid 5, divide equally 360 degrees on differential mechanism casing 2's the casing wall and be equipped with four radial through-holes, the position that corresponds each radial through-hole is equipped with the pinhole that transversely runs through radial through-hole, differential mechanism casing 2's pinhole is the shoulder, and the major diameter end of this shoulder is used for fixed pin 3 spacingly towards differential mechanism casing lid 5, the hole shoulder of shoulder, and the path end of this shoulder is for assembling the disappointing hole of fixed pin 3, is favorable to fixed pin 3 to install. The planet gear shaft is a cross shaft formed by a long shaft 8 and two short shafts 4, and pin holes for the fixing pins 3 to penetrate through are formed in the long shaft 8 and the short shafts 4. The two ends of the long shaft 8 are in clearance fit with two opposite radial through holes in the differential case 2 respectively, the long shaft 8 is fixed on the differential case 2 through fixing pins 3 inserted from pin holes, one ends of the two short shafts 4 are in axial symmetry connection with the long shaft 8, the other ends of the two short shafts are in clearance fit with the radial through holes perpendicular to the long shaft 8 in the differential case 2 respectively, the two short shafts 4 are fixed on the differential case 2 through the fixing pins 3 inserted from the pin holes respectively, and the four planetary bevel gears 7 are in clearance fit with the four ends of the cross shaft respectively and are meshed with the two half shaft bevel gears 1 in a cogged manner.
Preferably, a through hole is radially formed in the middle of the shaft section of the long shaft 8, a shaft neck is arranged at one end of each short shaft 4, the shaft necks of the two short shafts 4 are inserted into the through hole of the long shaft 8 to form clearance fit, so that the planetary bevel gears of the differential can be assembled conveniently, and the short shafts 4 can be inserted into the radial through holes in the differential case 2, penetrate through the planetary bevel gears and are connected to the long shaft 8 to form a cross shaft.
Preferably, the end of the differential case cover 5 with the limiting flange corresponds to the mounting position of the fixing pin 3, and after the differential case cover 5 is fixedly connected with the main reduction gear 6 and the differential case 2, the limiting flange on the differential case cover 5 forms the stopping limit for the fixing pin 3.
The utility model discloses an optimization based on traditional differential mechanism structure is the same with traditional gear formula differential mechanism principle in the function, however, the utility model discloses the differential mechanism of structure arranges that four planetary bevel gear's assembly structure is more reasonable, and the installation combination is convenient easy more, can reduce when designing big torque transmission and arrange the space, and the structure is compacter, and bearing capacity can improve about 1.5 ~ 1.8 times.
Claims (5)
1. The utility model provides a differential mechanism structure of car forerunner's derailleur, includes differential mechanism casing (2), differential mechanism casing lid (5), four planetary bevel gear (7), two half axle bevel gear (1) and planet gear axle, its characterized in that: the differential mechanism is characterized in that opposite ends of the differential mechanism shell (2) and the differential mechanism shell cover (5) are respectively provided with an extending section for mounting a bearing, the extending sections of the differential mechanism shell (2) and the differential mechanism shell cover (5) for mounting the bearing are respectively provided with an axial through hole, the opposite ends of the differential mechanism shell (2) and the differential mechanism shell cover (5) are respectively provided with an assembly limiting flange, wherein the inner circumferential wall of the assembly limiting flange of the differential mechanism shell cover (5) is in clearance fit with the outer circumferential wall of the assembly limiting flange of the differential mechanism shell (2), so that a gear mechanism mounting cavity is formed between the differential mechanism shell (2) and the differential mechanism shell cover (5), a main reduction gear (6) is sleeved on the outer circle of the assembly limiting flange of the differential mechanism shell cover (5) and clamped between the differential mechanism shell (2) and the differential mechanism shell cover (5), and the differential mechanism shell, The main reduction gear (6) and the differential shell (2) are fixedly connected together, two half shaft bevel gears (1) are symmetrically arranged in the gear mechanism mounting cavity, a left half shaft bevel gear is rotatably supported on the differential shell (2), a right half shaft gear is rotatably supported on the differential shell cover (5), four radial through holes are uniformly distributed in 360 degrees on the shell wall of the differential shell (2), pin holes transversely penetrating through the radial through holes are arranged at positions corresponding to the radial through holes, a planet gear shaft forms a cross shaft by a long shaft (8) and two short shafts (4), two ends of the long shaft (8) are in clearance fit with two opposite radial through holes on the differential shell (2) respectively, the long shaft (8) is fixed by fixing pins (3) inserted from the pin holes, one ends of the two short shafts (4) are in axial symmetry connection with the long shaft (8), and the other ends of the two short shafts are in clearance fit with the radial through holes perpendicular to the long shaft (8) on, the two short shafts (4) are fixed through fixing pins (3) inserted from pin holes respectively, and the four planetary bevel gears (7) are in clearance fit with the four ends of the cross shaft respectively and are meshed with the two half shaft bevel gears (1) in a cogged manner.
2. The differential structure of the automotive forward drive transmission according to claim 1, characterized in that: the middle of the shaft section of the long shaft (8) is radially provided with a through hole, one end of the short shaft (4) is provided with a shaft neck, and the shaft necks of the two short shafts (4) are inserted into the through hole of the long shaft (8) to form clearance fit.
3. The differential structure of the automotive forward drive transmission according to claim 1, characterized in that: and pin holes for the fixing pins (3) to pass through are formed in the long shaft (8) and the short shaft (4).
4. The differential structure of the automotive forward drive transmission according to claim 1, characterized in that: the pin hole of differential mechanism casing (2) is the shoulder hole, and the big footpath end of this shoulder hole is towards differential mechanism casing lid (5), and the hole shoulder of shoulder hole is used for fixed pin (3) spacing.
5. The differential structure of the automotive forward drive transmission according to claim 1, characterized in that: the mounting position that the axle head face of assembly limit flange corresponds fixed pin (3) on differential mechanism casing lid (5), behind differential mechanism casing lid (5) and main reduction gear (6), differential mechanism casing (2) fixed connection, it is spacing to form the stopping through assembly limit flange on differential mechanism casing lid (5) to fixed pin (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920043944.5U CN210034327U (en) | 2019-01-11 | 2019-01-11 | Differential mechanism structure of automobile front-drive transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920043944.5U CN210034327U (en) | 2019-01-11 | 2019-01-11 | Differential mechanism structure of automobile front-drive transmission |
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| Publication Number | Publication Date |
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| CN210034327U true CN210034327U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920043944.5U Active CN210034327U (en) | 2019-01-11 | 2019-01-11 | Differential mechanism structure of automobile front-drive transmission |
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| CN (1) | CN210034327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469720A (en) * | 2019-01-11 | 2019-03-15 | 重庆青山工业有限责任公司 | The differential assembly of automobile front drive speed changer |
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2019
- 2019-01-11 CN CN201920043944.5U patent/CN210034327U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469720A (en) * | 2019-01-11 | 2019-03-15 | 重庆青山工业有限责任公司 | The differential assembly of automobile front drive speed changer |
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