CN214743128U - Through drive axle main reducer structure - Google Patents
Through drive axle main reducer structure Download PDFInfo
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- CN214743128U CN214743128U CN202022701359.5U CN202022701359U CN214743128U CN 214743128 U CN214743128 U CN 214743128U CN 202022701359 U CN202022701359 U CN 202022701359U CN 214743128 U CN214743128 U CN 214743128U
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Abstract
The utility model provides a through transaxle main reducer structure, this reduction gear include initiative roller gear, latter half shaft gear and planetary gear, be provided with first rolling mechanism between initiative roller gear and the main shaft, latter half shaft gear with be provided with second rolling mechanism between the main shaft, planetary gear with be provided with third rolling mechanism between the cross. The input flange is arranged on the end face of the input flange; the end face of the main shaft is provided with splines matched with the end face splines of the input flange. The utility model discloses effectual among the prior art through drive axle main reducer quality is heavy, work efficiency is low, the life-span is short and the poor scheduling problem of reliability of having solved.
Description
Technical Field
The utility model belongs to the automobile manufacturing field, concretely relates to through transaxle main reducer structure.
Background
At present, under the background of emission limitation and efficient transportation, the axle needs to meet the technical requirements of light dead weight, high efficiency, long service life and the like. However, in the conventional arrangement of the main reducer of the axle, the driving bevel gear is supported by a riding type, the supporting mode has larger offset distance and high friction loss and oil stirring loss, and the transmission efficiency is reduced; and the active bevel gear of the traditional axle main reducer usually uses adjusting shims, the pretightening force of the main bevel bearing is adjusted by selecting the adjusting shims with different thicknesses, the thickness specification of the adjusting shims is various, the assembling action is complex and the assembling action is easy to repeat.
The conventional axle main reducer also uses a large number of sliding friction pair structures, so that the service life is short, and the reliability is low.
For a through drive axle main speed reducer, due to structural limitation of radial splines, an input end flange of the through drive axle main speed reducer is long in axial dimension and heavy in weight.
The utility model has the following contents:
based on above-mentioned defect the utility model provides a through transaxle main reducer structure. The problems that a through type drive axle main reducer in the prior art is heavy in mass, low in working efficiency, short in service life, poor in reliability and the like are effectively solved.
The utility model discloses a realize through following technical scheme:
a gear assembly, a main shaft and a cross shaft are arranged on the main speed reducer, and rolling mechanisms are arranged between the gear assembly and the main shaft and between the gear assembly and the cross shaft respectively.
Furthermore, the gear assembly comprises a driving cylindrical gear, a rear half shaft gear and a planetary gear, a first rolling mechanism is arranged between the driving cylindrical gear and the main shaft, a second rolling mechanism is arranged between the rear half shaft gear and the main shaft, and a third rolling mechanism is arranged between the planetary gear and the cross shaft.
Furthermore, the planetary gear comprises an inter-shaft planetary gear and an inter-wheel planetary gear, the cross shafts comprise inter-shaft cross shafts and inter-wheel cross shafts, a first roller pin assembly is arranged between the inter-shaft planetary gear and the inter-shaft cross shafts, and a second roller pin assembly is arranged between the inter-wheel planetary gear and the inter-wheel cross shafts.
Preferably, the first rolling mechanism is a needle bearing i for bearing the radial force of the driving cylindrical gear, and the second rolling mechanism is a needle bearing ii for bearing the radial force of the rear half shaft gear.
Preferably, the first roller pin assembly and the second roller pin assembly are both closely-arranged roller pins and have no retainer;
furthermore, an adjusting gasket and a thrust needle bearing are arranged between the axial end face of the driving cylindrical gear and the end face of the main shaft, the adjusting gasket is used for adjusting axial side clearance of the bevel gear pair between shafts, and the thrust needle bearing is used for supporting the driving cylindrical gear to bear axial force.
Further, still include the interaxle differential case, the interaxle differential case is used for supporting the interaxle planet wheel, interaxle differential case center is provided with annular oil groove for the storage lubricating oil improves interaxle differential lubricating property.
Furthermore, the speed reducer also comprises an input flange, wherein a spline is arranged on the end surface of the input flange; the end face of the main shaft is provided with splines matched with the end face splines of the input flange.
Furthermore, the reducer also comprises a driving conical gear and a waveform sleeve, wherein the driving conical gear is supported in a cantilever manner, the waveform sleeve is arranged on a shaft neck of the driving conical gear and used for providing pre-tightening force for a conical bearing of the driving conical gear, and the offset distance of the driving conical gear is 0-20 mm.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model has the advantages that through the end face spline connection between the input flange and the main shaft, the axial size can be effectively shortened through the end face spline structure, and the self quality of the speed reducer is reduced;
the needle rolling bearing is arranged between the radial direction of the driving cylindrical gear and the main shaft, so that abnormal abrasion caused by sliding friction when the driving cylindrical gear rotates around the main shaft is avoided, and early abrasion caused by unbalance loading is avoided;
the thrust needle roller bearing is arranged between the axial direction of the driving cylindrical gear and the main shaft, so that abnormal abrasion caused by sliding friction when the end face at the position of the driving cylindrical gear rotates is avoided, and early abrasion caused by unbalance loading is avoided;
the needle roller bearing is arranged between the radial direction of the rear half shaft gear and the main shaft, so that abnormal abrasion caused by sliding friction when the driving cylindrical wheel rotates around the main shaft is avoided, and early abrasion caused by unbalanced load is avoided;
through the roller pin assemblies used between the planet wheels of the inter-axle differential mechanism and the inter-wheel differential mechanism and the cross shafts, abnormal abrasion caused by sliding friction when the planet wheels rotate around the cross shafts during differential is avoided, and early abrasion caused by unbalance loading is avoided.
By arranging the central annular oil groove in the interaxial differential shell, lubricating oil can be stored, and the internal lubricating performance of the interaxial differential is further improved.
The driving bevel gear is supported in a cantilever mode, so that one bearing support is reduced, and friction loss is reduced; the offset distance is 0 mm-20 mm, and is far away from the surface of the lubricating oil, thereby reducing the oil stirring loss.
The corrugated sleeve is sleeved on the shaft neck of the driving conical gear, and the corrugated sleeve is pre-pressed to generate elastic deformation, so that pre-tightening force is further provided for the two conical bearings, the arrangement of adjusting gaskets is omitted, the assembly action generated when the adjusting gaskets with different thicknesses are selected is reduced, and the assembly efficiency can be effectively improved.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the longitudinal section structure of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a schematic structural view of a spline connection between the middle input flange and the main shaft of the present invention.
Description of reference numerals:
1-an input flange; 2-a main shaft; 3-fastening bolts; 4-driving cylindrical gear; 5-adjusting the spacer; 6-thrust needle roller bearing; 7-1-needle bearing I; 7-2-needle bearing II; 8-inter-axis planet wheels; 9-inter-axis spider; 10-1-a first needle assembly; 10-2-a second needle assembly; 11-interaxial differential case; 12-rear half-shaft gear; 13-inter-wheel planet; 14-inter-wheel spider; 15-driving bevel gear; 16-wave sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically connected or connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Fig. 1 is a schematic view of the longitudinal section structure of the present invention; as shown in figure 1, a novel through type drive axle main reducer structure is provided with a gear assembly, a main shaft 2 and a cross shaft, wherein rolling mechanisms are arranged between the gear assembly and the main shaft 2 and between the gear assembly and the cross shaft respectively.
The gear assembly comprises a driving cylindrical gear 4, a rear half shaft gear 12 and a planetary gear 13, a first rolling mechanism is arranged between the driving cylindrical gear 4 and the main shaft 2, a second rolling mechanism is arranged between the rear half shaft gear 12 and the main shaft 2, and a third rolling mechanism is arranged between the planetary gear 13 and the cross shaft.
Wherein, first rolling mechanism specifically is: a needle bearing I7-1 is arranged between the radial direction of the driving cylindrical gear 4 and the main shaft 2, and the bearing provides a rolling friction pair between the driving cylindrical gear 4 and the main shaft 2 and bears the radial force of the driving cylindrical gear 4; the driving cylindrical gear 4 and the main shaft 2 are provided with needle roller bearings in the radial direction, so that abnormal abrasion caused by sliding friction when the driving cylindrical gear rotates around the main shaft is avoided, and early abrasion caused by unbalance loading is avoided.
The second rolling mechanism is as follows: a needle bearing II 7-2 is arranged between the radial direction of the rear half shaft gear 12 and the main shaft 2, and the bearing provides a rolling friction pair between the rear half shaft gear 12 and the main shaft 2 and bears the radial force of the rear half shaft gear 12. The rear half shaft gear 12 and the main shaft 2 are provided with needle roller bearings in the radial direction, so that abnormal abrasion caused by sliding friction when the driving cylindrical wheel rotates around the main shaft is avoided, and early abrasion caused by unbalance loading is avoided.
The planetary gear comprises an inter-shaft planetary gear 8 and an inter-wheel planetary gear 13, the cross shafts comprise inter-shaft cross shafts 9 and inter-wheel cross shafts 14, a first needle roller assembly 10-1 is arranged between the inter-shaft planetary gear 8 and the inter-shaft cross shafts 9, and the needle roller assembly provides a rolling friction pair between the inter-shaft planetary gear 8 and the inter-shaft cross shafts 9 and bears radial force. And the abnormal abrasion caused by sliding friction when the planet wheel rotates around the cross shaft in differential speed is avoided, and the early abrasion caused by unbalance loading is avoided.
A second needle roller assembly 10-2 is disposed between the inter-wheel planetary gear 13 and the inter-wheel spider 14. The assembly provides a rolling friction pair between the inter-wheel planet gears 13 and the inter-wheel spider 14, bearing radial forces. Abnormal abrasion caused by sliding friction when the planet wheel rotates around the cross shaft in differential speed is avoided, and early abrasion caused by unbalanced load is avoided; the first needle roller assembly 10-1 and the second needle roller assembly 10-2 are both closely-arranged needle rollers and have no retainer. The third rolling mechanism described above includes the first needle roller assembly 10-1 and the second needle roller assembly 10-2.
The planet wheels are supported by an inter-axle differential housing 11, and an annular oil groove is formed in the center of the inter-axle differential housing 11 and used for storing lubricating oil to improve the lubricating performance of the inter-axle differential.
FIG. 2 is an enlarged view of a portion A of FIG. 1; as shown in fig. 2, an adjusting shim 5 and a needle thrust bearing 6 are further disposed between an axial end face of the driving spur gear 4 and an end face of the main shaft 2, the adjusting shim 5 is used for adjusting an axial backlash of an inter-shaft bevel gear pair, and the needle thrust bearing 6 is used for supporting the driving spur gear to bear an axial force.
As a further embodiment, fig. 3 is a schematic structural view of a spline connection between the input flange and the main shaft according to the present invention. As shown in fig. 3, the speed reducer further comprises an input flange 1, wherein splines are arranged on the end face of the input flange 1; and a spline which is matched with the end face spline of the input flange is arranged on the end face of the main shaft 2. The input flange is connected with the main shaft through an end face spline and is fixed by a fastening bolt; the end face spline structure can effectively shorten the axial size and reduce the mass.
As a further embodiment, as shown in fig. 1, the reducer further includes a driving bevel gear 15 and a waveform sleeve 16, the driving bevel gear is supported by a cantilever type, the waveform sleeve is sleeved on a shaft neck of the driving bevel gear and used for providing a pre-tightening force for a conical bearing of the driving bevel gear, and the offset distance of the driving bevel gear is 0 mm-20 mm. The driving conical gear is supported by a cantilever type, so that one bearing support is reduced, and the friction loss is reduced; the offset distance is 0 mm-20 mm, and the oil stirring loss is reduced by keeping away from the liquid level of the lubricating oil. The specific setting mode and effect of the waveform sleeve are that the elastic deformation generated by pre-pressing provides pre-tightening force for the two conical bearings, so that adjusting gaskets are cancelled, the assembly action generated when the adjusting gaskets with different thicknesses are selected is reduced, and the assembly efficiency can be effectively improved.
The utility model discloses the theory of operation does:
the input flange 1 is connected with the main shaft 2 through an end face spline and fixed by the fastening bolt 3, and the end face spline structure can effectively shorten the axial size and reduce the mass. The driving cylindrical gear 4 and the rear half shaft gear 12 are respectively provided with a needle bearing I7-1 and a needle bearing II 7-2 in the radial direction with the main shaft 2, so that abnormal abrasion caused by radial sliding friction and early abrasion caused by unbalance loading are avoided; the driving cylindrical gear 4 and the main shaft 2 are axially provided with a thrust needle bearing 6, so that abnormal abrasion caused by end face sliding friction and early abrasion caused by unbalance loading are avoided; a first roller pin assembly and a second roller pin assembly are respectively used between the planet wheel and the cross shaft of the inter-axle differential and the inter-wheel differential, so that abnormal abrasion caused by sliding friction during differential speed and early abrasion caused by unbalance loading are avoided. An annular oil groove is formed in the center of the inter-axle differential housing 11, so that lubricating oil can be stored, and the lubricating performance of the inter-axle differential is improved. The driving bevel gear 15 is supported by a cantilever type, so that one bearing support is reduced, and the friction loss can be reduced. The wave-shaped sleeve 16 provides the pre-tightening force of the conical bearing through pre-pressing, eliminates adjusting gaskets, reduces the assembling action of selecting the adjusting gaskets with different thicknesses, and can effectively improve the assembling efficiency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A through type drive axle main reducer structure is characterized in that a gear assembly, a main shaft and a cross shaft are arranged on the main reducer, and rolling mechanisms are arranged between the gear assembly and the main shaft and between the gear assembly and the cross shaft respectively.
2. A through-drive axle final drive mechanism according to claim 1, wherein the gear assembly comprises a drive spur gear, a rear half shaft gear and a planetary gear, a first rolling mechanism is arranged between the drive spur gear and the main shaft, a second rolling mechanism is arranged between the rear half shaft gear and the main shaft, and a third rolling mechanism is arranged between the planetary gear and the cross shaft.
3. A through drive axle final drive arrangement as set forth in claim 2, wherein said planetary gears include inter-shaft and inter-wheel planetary gears, said cross-shafts include inter-shaft and inter-wheel cross-shafts, a first needle roller assembly is disposed between said inter-shaft planetary gears and said inter-shaft cross-shafts, and a second needle roller assembly is disposed between said inter-wheel planetary gears and said inter-wheel cross-shafts.
4. A through-drive axle final drive mechanism according to claim 2, wherein the first rolling mechanism is a needle bearing i for receiving the radial force of the drive cylindrical gear, and the second rolling mechanism is a needle bearing ii for receiving the radial force of the rear half shaft gear.
5. A through drive axle final drive arrangement as set forth in claim 3, wherein said first and second needle roller assemblies are closely-spaced needles and lack cages.
6. A through drive axle final drive structure as defined in claim 2, wherein an adjusting shim and a needle thrust bearing are further disposed between the axial end face of the drive spur gear and the end face of the main shaft, the adjusting shim is used for adjusting axial backlash of the bevel gear pair between shafts, and the needle thrust bearing is used for supporting the drive spur gear to bear axial force.
7. A through-drive axle final drive mechanism as recited in claim 2, further comprising an inter-axle differential case for supporting the inter-axle planets, wherein an annular oil sump is provided in the center of the inter-axle differential case for storing lubricating oil to improve the lubricating performance of the inter-axle differential.
8. A through drive axle final drive arrangement as set forth in claim 1, further comprising an input flange having splines on an end surface thereof; the end face of the main shaft is provided with splines matched with the end face splines of the input flange.
9. A through-drive axle final drive structure as claimed in claim 1, further comprising a drive bevel gear and a wave-shaped sleeve, wherein the drive bevel gear is supported by a cantilever type, the wave-shaped sleeve is disposed on a shaft neck of the drive bevel gear and is used for providing pre-tightening force for a conical bearing of the drive bevel gear, and the offset distance of the drive bevel gear is 0 mm-20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022701359.5U CN214743128U (en) | 2020-11-20 | 2020-11-20 | Through drive axle main reducer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022701359.5U CN214743128U (en) | 2020-11-20 | 2020-11-20 | Through drive axle main reducer structure |
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| Publication Number | Publication Date |
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| CN214743128U true CN214743128U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022701359.5U Active CN214743128U (en) | 2020-11-20 | 2020-11-20 | Through drive axle main reducer structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877050A (en) * | 2022-05-12 | 2022-08-09 | 一汽解放汽车有限公司 | Middle axle speed reducer and vehicle |
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2020
- 2020-11-20 CN CN202022701359.5U patent/CN214743128U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877050A (en) * | 2022-05-12 | 2022-08-09 | 一汽解放汽车有限公司 | Middle axle speed reducer and vehicle |
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