CN112664636A - Multi-spherical-surface interaxial differential assembly - Google Patents
Multi-spherical-surface interaxial differential assembly Download PDFInfo
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- CN112664636A CN112664636A CN202011643637.4A CN202011643637A CN112664636A CN 112664636 A CN112664636 A CN 112664636A CN 202011643637 A CN202011643637 A CN 202011643637A CN 112664636 A CN112664636 A CN 112664636A
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Abstract
The invention discloses a multi-spherical inter-axle differential assembly, and belongs to the technical field of automobile drive axles. The multi-spherical inter-axle differential assembly comprises a cylindrical gear shaft, a half axle gear, a differential case, a planetary gear and a driving cylindrical gear, wherein a first concave spherical surface of the half axle gear is in matched butt joint with a first convex spherical surface of the cylindrical gear shaft, the planetary gear is connected to the cylindrical gear shaft through a cross shaft, and a second convex spherical surface of the planetary gear is in matched butt joint with a second concave spherical surface of the differential case; the third concave spherical surface of the driving cylindrical gear is in matched butt joint with the third convex spherical surface of the cylindrical gear shaft, two ends of the planetary gear are respectively meshed with the driving cylindrical gear and the half axle gear, and the cylindrical gear shaft is in spline fit connection with the cross shaft. The multi-spherical interaxial differential assembly improves the transmission reliability, and is not easy to wear or even fail in transmission.
Description
Technical Field
The invention relates to the technical field of automobile drive axles, in particular to a multi-spherical interaxial differential assembly.
Background
At present, an interaxle differential assembly adopted in a through type drive axle is used for realizing a differential function between a middle axle and a rear axle. Adopt the shaft hole cooperation between the initiative cylindrical gear of interaxial differential mechanism assembly and the cylindrical gear axle, the terminal surface adopts the antifriction gasket structure, because initiative cylindrical gear receives differential mechanism's axial force effect, and there is relative rotation in initiative cylindrical gear and the cylindrical gear axle during the differential speed, leads to the antifriction gasket can take place abnormal wear, and then leads to the transmission function inefficacy. Simultaneously, adopt the shaft hole cooperation between half axle gear and the cylindrical gear axle, axial end face direct contact because the cylindrical gear axle receives half axle gear's axial force effect, and there is relative rotation in half axle gear and the cylindrical gear axle during the differential, leads to cylindrical gear axle terminal surface abnormal wear, and then leads to the transmission function inefficacy.
Disclosure of Invention
The invention aims to provide a multi-spherical inter-axle differential assembly which improves the transmission reliability and is not easy to wear or even fail in transmission.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-spherical surface interaxial differential assembly comprises a cylindrical gear shaft, a half axle gear, a differential case, a planetary gear and a driving cylindrical gear, wherein a first concave spherical surface of the half axle gear is in matched butt joint with a first convex spherical surface of the cylindrical gear shaft, the planetary gear is connected to the cylindrical gear shaft through a cross shaft, and a second convex spherical surface of the planetary gear is in matched butt joint with a second concave spherical surface of the differential case; the third concave spherical surface of the driving cylindrical gear is in matched abutting connection with the third convex spherical surface of the cylindrical gear shaft, two ends of the planetary gear are respectively meshed with the driving cylindrical gear and the half axle gear, and the cylindrical gear shaft is in spline fit connection with the cross shaft.
Optionally, an oil passage hole is formed in the side gear, and an outlet of the oil passage hole is communicated with the first convex spherical surface.
Optionally, the multi-spherical-surface inter-axle differential assembly further comprises a shifting fork ring, wherein the end face of the shifting fork ring is meshed with the end face of the driving cylindrical gear, a first spline hole of the shifting fork ring is matched and connected with a first spline tooth of the cylindrical gear shaft, and an annular groove is formed between the shifting fork ring and the driving cylindrical gear and between the shifting fork ring and the cylindrical gear shaft in an enclosing mode.
Optionally, the multi-spherical inter-axle differential assembly further includes a first tapered roller bearing, the first tapered roller bearing is connected to the axle diameter of the side gear, and an inner ring end surface of the first tapered roller bearing is attached to the outer end surface of the side gear.
Optionally, the multi-spherical inter-axle differential assembly further comprises a second tapered roller bearing, the second tapered roller bearing is connected with the diameter of the cylindrical gear shaft, and the second tapered roller bearing is connected with the outer end face of the cylindrical gear shaft in an attaching manner.
Optionally, four shaft diameters are arranged on the cross shafts, four planetary gears are arranged, and the four planetary gears penetrate through the shaft diameters of the four cross shafts in a one-to-one correspondence manner.
Optionally, a second spline hole is formed in the cross shaft, second spline teeth are formed in the cylindrical gear shaft, and the second spline hole is connected with the second spline teeth in a matched mode.
Optionally, a third spline hole is formed in the side gear, the third spline hole is connected with the through shaft in a matched mode, and the oil passage hole is communicated with the through shaft.
Optionally, the bevel teeth of the driving cylindrical gear and the first bevel teeth of the planetary gear are meshed with each other.
Optionally, the bevel teeth of the side gear intermesh with the second bevel teeth of the planet gears.
Compared with the prior art, the invention has the beneficial effects that: the driving cylindrical gear and the cylindrical gear shaft of the multi-spherical interaxial differential assembly adopt a mode of matching and abutting the third concave spherical surface and the third convex spherical surface to replace a mode of matching shaft holes in the prior art, and an anti-friction gasket and a bush structure on the end surface are eliminated, so that the axial matching area is increased by spherical matching, the bearing capacity, the axial force and the abrasion resistance are strong, and the frequency of abnormal abrasion of the matching surface is reduced; in order this simultaneously, the mode that half axle gear and cylindrical gear axle adopted first concave spherical surface and first convex spherical surface cooperation butt has replaced the shaft hole cooperation among the prior art, and the spherical surface cooperation has increased the axial cooperation area, and bearing capacity axial force and wear resistance are strong to the frequency of fitting surface abnormal wear has been reduced. The second convex spherical surface of the planetary gear is also in fit contact with the second concave spherical surface of the differential case, and the same effect is obtained. In conclusion, the multi-spherical inter-axle differential assembly improves the transmission reliability, is not easy to wear or even fail in transmission, and reduces the cost.
Drawings
FIG. 1 is a schematic structural view of a multi-spherical-surface-mating inter-axle differential assembly provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a driving cylindrical gear provided in an embodiment of the present invention;
FIG. 3 is a schematic structural view of a side gear provided in an embodiment of the present invention;
fig. 4 is a schematic structural view of a cylindrical gear shaft provided in an embodiment of the present invention.
Reference numerals:
1-cylindrical gear shaft, 11-first convex spherical surface, 12-third convex spherical surface, 13-first spline tooth, 14-second spline tooth, 2-side gear, 21-first concave spherical surface, 22-oil passage hole, 3-differential case, 4-planetary gear, 41-second convex spherical surface, 5-driving cylindrical gear, 51-third concave spherical surface, 6-cross shaft, 7-shifting fork ring, 71-annular groove, 8-first tapered roller bearing and 9-second tapered roller bearing.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
The specific structure of the multi-spherical inter-axle differential assembly according to the embodiment of the present invention will be described with reference to fig. 1 to 4.
As shown in fig. 1 to 4, the present embodiment provides a multi-spherical inter-axle differential assembly, which includes a cylindrical gear shaft 1, a side gear 2, a differential case 3, a planetary gear 4 and a driving cylindrical gear 5, wherein a first concave spherical surface 21 of the side gear 2 is in fit abutment with a first convex spherical surface 11 of the cylindrical gear shaft 1, the planetary gear 4 is connected to the cylindrical gear shaft 1 through a cross shaft 6, and a second convex spherical surface 41 of the planetary gear 4 is in fit abutment with a second concave spherical surface of the differential case 3; the third concave spherical surface 51 of the driving cylindrical gear 5 is in matched butt joint with the third convex spherical surface 12 of the cylindrical gear shaft 1, two ends of the planetary gear 4 are respectively meshed with the driving cylindrical gear 5 and the half shaft gear 2, and the cylindrical gear shaft 1 is in spline fit connection with the cross shaft 6.
It should be noted that the driving cylindrical gear 5 and the cylindrical gear shaft 1 of the multi-spherical inter-shaft differential assembly of the present invention adopt a manner of the third concave spherical surface 51 and the third convex spherical surface 12 in a matching and abutting manner, instead of the manner of the shaft hole matching in the prior art, and an anti-wear gasket and a bush structure of the end surface are eliminated, the spherical surface matching increases the axial matching area, and the bearing axial force capability and the abrasion resistance capability are strong, thereby reducing the frequency of abnormal wear of the matching surface; in this time, the mode that half axle gear 2 and cylindrical gear axle 1 adopted first concave spherical surface 21 and first convex spherical surface 11 cooperation butt has replaced the shaft hole cooperation among the prior art, and the spherical surface cooperation has increased axial cooperation area, and bears axial capacity and ability reinforce to wear resistance to the frequency of fitting surface abnormal wear has been reduced. In addition, the second convex spherical surface 41 of the planetary gear 4 is in fit abutment with the second concave spherical surface of the differential case 3, and the second concave spherical surface functions to avoid the planetary gear 4, thereby avoiding the differential case 3 from interfering with the planetary gear 4. In conclusion, the multi-spherical inter-axle differential assembly improves the transmission reliability, is not easy to wear or even fail in transmission, and reduces the cost.
Alternatively, as shown in fig. 3, an oil passage hole 22 is provided in the side gear 2, and an outlet of the oil passage hole 22 communicates with the first convex spherical surface 11. The side gear 2 is provided with the oil passage hole 22, and gear oil can flow from the outlet of the oil passage hole 22 onto the surface of the first convex spherical surface 11 to lubricate the first convex spherical surface 11.
Optionally, as shown in fig. 1, the multi-spherical inter-axle differential assembly further includes a shift fork ring 7, an end surface of the shift fork ring 7 is meshed with an end surface of the driving cylindrical gear 5, a first spline hole of the shift fork ring 7 is connected with a first spline tooth 13 of the cylindrical gear shaft 1 in a matching manner, and an annular groove 71 is defined between the shift fork ring 7 and the driving cylindrical gear 5 and the cylindrical gear shaft 1. It will be appreciated that the yoke ring 7 shifts the inter-axle differential assembly between a locked mode, a differential mode and a neutral mode. In addition, milling cutter processing first spline tooth 13 has one section incomplete spline, and the first splined hole of declutch shift ring 7 can't pass through, increases that this section incomplete spline can be got rid of to annular 71, increases the axial stroke of declutch shift ring 7.
Optionally, as shown in fig. 1, the multi-spherical inter-axle differential assembly further includes a first tapered roller bearing 8, the first tapered roller bearing 8 is connected to the axle diameter of the side gear 2, and the inner ring end surface of the first tapered roller bearing 8 is connected to the outer end surface of the side gear 2 in an abutting manner. It can be understood that, in order to ensure the smoothness of the rotation of the side gear 2, the first tapered roller bearing 8 is attached to the outer end face of the side gear 2, and the limiting effect is good.
Optionally, as shown in fig. 1, the multi-spherical inter-axle differential assembly further includes a second tapered roller bearing 9, the second tapered roller bearing 9 is connected to the shaft diameter of the cylindrical gear shaft 1, and the second tapered roller bearing 9 is attached to the outer end surface of the cylindrical gear shaft 1. It can be understood that, in order to guarantee the smoothness of the rotation of the cylindrical gear shaft 1, the second tapered roller bearing 9 is attached to the outer end face of the cylindrical gear shaft 1, and the limiting effect is good.
Alternatively, as shown in fig. 1, four shaft diameters are provided on the cross shafts 6, four planetary gears 4 are provided, and the four planetary gears 4 are respectively arranged on the shaft diameters of the four cross shafts 6 in a one-to-one correspondence manner. It can be understood that the number of the planet gears 4 is four, four planet gears 4 are respectively arranged on four shaft diameters of the cross shaft 6, and the planet gears 4 are respectively meshed with the half shaft gear 2 and the driving cylindrical gear 5. Torque is input from the spur gear shaft 1, transmitted to the cross 6, and distributed to the drive spur gear 5 and the side gear 2 via the planetary gear 4.
Optionally, as shown in fig. 1 and 4, a second spline hole is formed in the cross shaft 6, a second spline tooth 14 is formed in the cylindrical gear shaft 1, and the second spline hole and the second spline tooth 14 are connected in a matching manner, so that the fixing effect of the two is good, and the transmission reliability is higher.
Optionally, as shown in fig. 3, a third spline hole is formed in the side gear 2, the third spline hole is connected with the through shaft in a matched manner, the oil passage hole 22 is communicated with the through shaft, the fixing effect of the third spline hole and the through shaft is good, synchronous rotation is achieved, and transmission reliability is high.
Optionally, as shown in fig. 1, the bevel gear of the driving cylindrical gear 5 and the first bevel gear of the planetary gear 4 are meshed with each other, so that the fixing effect is good, and synchronous rotation is realized.
Alternatively, as shown in fig. 1, the bevel gear of the side gear 2 and the second bevel gear of the planetary gear 4 are engaged with each other, and the fixing effect is good.
In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Further, it is to be understood that the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "mounted," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. Those skilled in the art can understand the above specific meanings included in the present invention according to specific situations.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A multi-spherical-surface interaxial differential assembly is characterized by comprising a cylindrical gear shaft (1), a side gear (2), a differential case (3), a planetary gear (4) and a driving cylindrical gear (5), wherein a first concave spherical surface (21) of the side gear (2) is in matched butt joint with a first convex spherical surface (11) of the cylindrical gear shaft (1), the planetary gear (4) is connected to the cylindrical gear shaft (1) through a cross shaft (6), and a second convex spherical surface (41) of the planetary gear (4) is in matched butt joint with a second concave spherical surface of the differential case (3); the third concave spherical surface (51) of the driving cylindrical gear (5) is in matched abutting joint with the third convex spherical surface (12) of the cylindrical gear shaft (1), two ends of the planetary gear (4) are respectively meshed with the driving cylindrical gear (5) and the half shaft gear (2), and the cylindrical gear shaft (1) is in spline fit connection with the cross shaft (6).
2. A multi-spherical inter-axle differential assembly according to claim 1, wherein said side gear (2) is provided with an oil passage hole (22), and an outlet of said oil passage hole (22) communicates with said first convex spherical surface (11).
3. The multi-spherical interaxle differential assembly according to claim 1 further comprising a fork ring (7), wherein an end surface of the fork ring (7) is engaged with an end surface of the driving cylindrical gear (5), a first spline hole of the fork ring (7) is engaged with a first spline tooth of the cylindrical gear shaft (1), and an annular groove (71) is defined between the fork ring (7) and the driving cylindrical gear (5) and the cylindrical gear shaft (1).
4. The multi-spherical inter-axle differential assembly according to claim 1, further comprising a first tapered roller bearing (8), wherein the first tapered roller bearing (8) is connected to the axle diameter of the side gear (2), and the inner ring end surface of the first tapered roller bearing (8) is in abutting connection with the outer end surface of the side gear (2).
5. The multi-spherical inter-axle differential assembly according to claim 1, further comprising a second tapered roller bearing (9), wherein the second tapered roller bearing (9) is connected with the shaft diameter of the cylindrical gear shaft (1), and the second tapered roller bearing (9) is connected with the outer end face of the cylindrical gear shaft (1) in a fitting manner.
6. The multi-spherical inter-axle differential assembly according to claim 1, wherein said cross shafts (6) are provided with four diameters, said planetary gears (4) are provided with four, and four of said planetary gears (4) are disposed through said diameters of four of said cross shafts (6) in a one-to-one correspondence.
7. The multi-spherical interaxle differential assembly according to claim 1 wherein the spider (6) has a second spline hole, and the spur gear shaft (1) has a second spline tooth, and the second spline hole is engaged with the second spline tooth.
8. A multi-spherical inter-axle differential assembly according to claim 2, wherein said side gear (2) is provided with a third splined bore, said third splined bore being in mating engagement with a through-shaft, said oil passage bore (22) being in communication with said through-shaft.
9. A multi-spherical inter-axle differential assembly according to claim 1, wherein the conical teeth of said drive cylindrical gear (5) and the first conical teeth of said planetary gears (4) are intermeshed.
10. A multi-spherical inter-axle differential assembly as claimed in claim 1, wherein the bevel teeth of said side gears (2) intermesh with the second bevel teeth of said planet gears (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011643637.4A CN112664636B (en) | 2020-12-30 | 2020-12-30 | Multi-spherical-surface interaxial differential assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011643637.4A CN112664636B (en) | 2020-12-30 | 2020-12-30 | Multi-spherical-surface interaxial differential assembly |
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| CN112664636A true CN112664636A (en) | 2021-04-16 |
| CN112664636B CN112664636B (en) | 2022-09-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4108494A1 (en) * | 2021-06-21 | 2022-12-28 | ArvinMeritor Technology, LLC | Axle assembly having an interaxle differential unit |
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| EP4108494A1 (en) * | 2021-06-21 | 2022-12-28 | ArvinMeritor Technology, LLC | Axle assembly having an interaxle differential unit |
| US11602989B2 (en) | 2021-06-21 | 2023-03-14 | Arvinmeritor Technology, Llc | Axle assembly having an interaxle differential unit |
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|---|---|
| CN112664636B (en) | 2022-09-23 |
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