CN220828493U - Assembly structure of differential shell and planetary gear shaft - Google Patents
Assembly structure of differential shell and planetary gear shaft Download PDFInfo
- Publication number
- CN220828493U CN220828493U CN202322486764.3U CN202322486764U CN220828493U CN 220828493 U CN220828493 U CN 220828493U CN 202322486764 U CN202322486764 U CN 202322486764U CN 220828493 U CN220828493 U CN 220828493U
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- planetary gear
- gear shaft
- wear
- differential shell
- differential
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- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 101100074187 Caenorhabditis elegans lag-1 gene Proteins 0.000 description 1
- 208000019888 Circadian rhythm sleep disease Diseases 0.000 description 1
- 208000001456 Jet Lag Syndrome Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 208000033915 jet lag type circadian rhythm sleep disease Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Abstract
The assembly structure of the differential shell and the planetary gear shaft comprises a differential shell, the planetary gear shaft arranged in the differential shell, a planetary gear sleeved on the planetary gear shaft, and a spherical gasket clamped between the planetary gear and the differential shell, wherein the end parts of the planetary gear shaft respectively extend into connecting holes on the differential shell, and one end of the planetary gear shaft is positioned with the differential shell through a positioning pin, and the assembly structure is characterized in that: the aperture of the connecting hole is increased, the wear-resistant bushing is pressed in the connecting hole in an interference manner, the end part of the planetary gear shaft extends into the wear-resistant bushing, and the wear-resistant bushing is matched with the spherical gasket to limit the rotation of the spherical gasket. The utility model effectively reduces the risk of crushing, deformation and cracking of the connecting hole; the abrasion of the spherical gasket to the inner wall of the differential shell is avoided, the service life of the differential shell is prolonged, the abnormal noise of the differential mechanism is reduced, and the use reliability of the differential mechanism is improved.
Description
Technical Field
The utility model relates to an assembly structure of a differential shell and a planetary gear shaft, and belongs to the technical field of differential assembly.
Background
The differential is an important component for an automobile transmission system, is used for balancing and distributing power to driving wheels of the automobile, and is a core component for realizing different rotation speeds of left and right wheels when the automobile turns. The existing differential consists of a differential shell (called differential shell for short), a half shaft gear, a planetary gear shaft and other parts, wherein a gasket matched with a spherical surface is clamped between the planetary gear and the differential shell; with the increase of the light weight requirement of automobiles, the differential mechanism needs to bear higher transmission torque, and the outer diameter of the planet gear shafts is limited by the strength requirement of the planet gears, so that the sizes of the planet gear shafts are smaller, the differential mechanism shell connection Kong Shouli is concentrated, the crushing, deformation and even cracking of the differential mechanism shell connection holes are easy to occur, and the service life of the differential mechanism is seriously influenced; and because of long-term friction and vibration, the differential mechanism shell is generally cast and formed by adopting ductile iron, and the surface of a connecting hole made of ductile iron material is easy to wear, so that the reliability of connection is reduced. When the planetary gear rotates around the planetary shaft to form autorotation, at the moment, the inner hole of the planetary gear and the planetary gear shaft form a pair of friction pairs, the planetary gear and the gasket form a pair of friction pairs, so that the planetary gear and the gasket generate heat severely, the friction coefficient of the planetary gear and the gasket is increased due to overhigh temperature, the planetary gear is meshed and bonded with the gasket, friction is generated between the gasket and the inner wall of the differential case, the inner wall of the differential case is worn rapidly, the planetary gear is loosened, the tooth side gap between the half-shaft gear and the planetary gear is increased, and uneven turning and abnormal sound of a vehicle are caused.
Disclosure of utility model
The assembly structure of the differential shell and the planetary gear shaft can effectively increase the stress area of the connecting hole, avoid stress concentration and reduce the surface pressure of the connecting hole, thereby effectively reducing the risk of crushing, deformation and cracking of the connecting hole; the wear-resisting lining is matched with the spherical gasket to limit the rotation of the spherical gasket, so that the spherical gasket is prevented from synchronously rotating along with the planetary gear when the planetary gear and the spherical gasket are meshed and bonded due to temperature rise, the abrasion of the spherical gasket to the inner wall of the differential shell is avoided, the service life of the differential shell is prolonged, the abnormal noise of the differential mechanism is reduced, and the use reliability of the differential mechanism is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the assembly structure of the differential shell and the planetary gear shaft comprises a differential shell, the planetary gear shaft arranged in the differential shell, a planetary gear sleeved on the planetary gear shaft, and a spherical gasket clamped between the planetary gear and the differential shell, wherein the end parts of the planetary gear shaft respectively extend into connecting holes on the differential shell, and one end of the planetary gear shaft is positioned with the differential shell through a positioning pin, and the assembly structure is characterized in that: the aperture of the connecting hole is increased, the wear-resistant bushing is pressed in the connecting hole in an interference manner, the end part of the planetary gear shaft extends into the wear-resistant bushing, and the wear-resistant bushing is matched with the spherical gasket to limit the rotation of the spherical gasket.
Preferably, the outer wall of the wear-resistant bushing is provided with a positioning protrusion along the axial direction, the hole wall of the connecting hole is provided with a positioning groove corresponding to the positioning protrusion, and the positioning protrusion is embedded into the positioning groove along with the interference press-fitting of the wear-resistant bushing into the connecting hole, so that the pin hole on the wear-resistant bushing is aligned with the pin hole on the differential shell.
Preferably, the spherical gasket is in clearance fit and extends into the connecting hole to be matched with the wear-resistant lining.
Preferably, one surface of the spherical gasket matched with the differential shell is provided with an annular bulge which is in clearance fit and extends into the connecting hole, the annular bulge is provided with a matching groove, the inner end of the wear-resistant lining is provided with an end bulge corresponding to the matching groove, and the end bulge extends into the matching groove.
Preferably, the matching grooves are arc-shaped grooves, and the number of the matching grooves is two, and the matching grooves are symmetrically distributed on the annular protrusion.
Preferably, the wall thickness of the wear-resistant lining is not less than 5mm.
The beneficial effects of the utility model are as follows:
according to the assembly structure of the differential shell and the planetary toothed shaft, the aperture of the connecting hole on the differential shell is required to be increased, the wear-resistant bushing is pressed in the connecting hole in an interference manner, the end part of the planetary gear shaft extends into the wear-resistant bushing, the wall of the connecting hole is separated from the planetary gear shaft by the wear-resistant bushing, the wear of the wall of the connecting hole by the planetary gear shaft is avoided, the pressure of the planetary gear shaft is transmitted through the wear-resistant bushing by increasing the size of the connecting hole, the stress area of the connecting hole can be effectively increased, the stress concentration is avoided, and the surface pressure of the connecting hole is reduced, so that the risk of crushing, deformation and cracking of the connecting hole is effectively reduced; the wear-resisting lining is matched with the spherical gasket to limit the rotation of the spherical gasket, so that the spherical gasket is prevented from synchronously rotating along with the planetary gear when the planetary gear and the spherical gasket are meshed and bonded due to temperature rise, the abrasion of the spherical gasket to the inner wall of the differential shell is avoided, the service life of the differential shell is prolonged, the abnormal noise of the differential mechanism is reduced, and the use reliability of the differential mechanism is improved.
Drawings
Fig. 1 is a schematic view of an assembly structure of a differential case and a planetary gear shaft of the present utility model.
Fig. 2 is a partial enlarged view of fig. 1.
Fig. 3 is a cross-sectional view of a wear bushing.
Fig. 4 is a cross-sectional view of a spherical spacer.
Detailed Description
Embodiments of the present utility model are described in detail below with reference to fig. 1 to 4.
The assembly structure of the differential shell and the planetary gear shaft comprises a differential shell 1, the planetary gear shaft 2 arranged in the differential shell 1, a planetary gear 3 sleeved on the planetary gear shaft 2, and a spherical gasket 4 clamped between the planetary gear 3 and the differential shell 1, wherein the end parts of the planetary gear shaft 2 respectively extend into connecting holes 11 on the differential shell 1, and one end of the planetary gear shaft 2 is positioned with the differential shell 1 through a positioning pin 5, and the assembly structure is characterized in that: the aperture of the connecting hole 11 is increased, the wear-resistant bushing 6 is pressed in the connecting hole 11 in an interference manner, the end part of the planet gear shaft 2 extends into the wear-resistant bushing 6, and the wear-resistant bushing 6 is matched with the spherical gasket 4 to limit the rotation of the spherical gasket 4.
In the assembly structure of the differential shell and the planetary toothed shaft, the aperture of the connecting hole 11 on the differential shell 1 is required to be increased, the wear-resistant bushing 6 is pressed in the connecting hole 11 in an interference manner, the end part of the planetary gear shaft 2 extends into the wear-resistant bushing 6, the wall of the connecting hole 11 is separated from the planetary gear shaft 2 by the wear-resistant bushing 6, the wear of the wall of the connecting hole by the planetary gear shaft 2 is avoided, the pressure of the planetary gear shaft 2 is transmitted by increasing the size of the connecting hole 11 through the wear-resistant bushing 6, the stress area of the connecting hole 11 can be effectively increased, the stress concentration is avoided, the surface pressure of the connecting hole is reduced, and therefore the risks of crushing, deformation and cracking of the connecting hole are effectively reduced; the wear-resisting lining 6 cooperates with the spherical gasket 4 to limit the rotation of the spherical gasket 4, and when the planetary gear 3 and the spherical gasket 4 are meshed and bonded due to temperature rise, the spherical gasket 4 is prevented from synchronously rotating along with the planetary gear 3, so that the wear of the spherical gasket 4 on the inner wall of the differential shell is avoided, the service life of the differential shell is prolonged, the abnormal noise of the differential mechanism is reduced, and the use reliability of the differential mechanism is improved.
The outer wall of the wear-resistant bushing 6 is provided with a positioning protrusion 61 along the axial direction, the hole wall of the connecting hole 11 is provided with a positioning groove 12 corresponding to the positioning protrusion 61, and the positioning protrusion 61 is embedded into the positioning groove along with the interference press-fitting of the wear-resistant bushing 6 into the connecting hole 11, so that the pin hole on the wear-resistant bushing 6 is aligned with the pin hole on the differential shell 1. Because the differential shell 1 and the planetary gear shaft 2 are positioned through the positioning pins 5, the positioning pins 5 penetrate through the connecting holes 11 and the wear-resistant bushings 6 in the radial direction and extend into the differential shell 1, pin holes corresponding to the positioning pins 5 are required to be formed in the wear-resistant bushings 6 and aligned with the pin holes in the differential shell 1, positioning protrusions 61 are formed in the wear-resistant bushings 6, positioning grooves 12 are formed in the connecting holes 11, pin holes in the wear-resistant bushings 6 are aligned with the pin holes in the differential shell 1 after the wear-resistant bushings 6 are pressed in through the matching of the positioning protrusions 61 and the positioning grooves 12, the wear-resistant bushings 6 are positioned in the circumferential direction, the wear-resistant bushings 6 are prevented from rotating in the connecting holes 11, and the positioning reliability of the wear-resistant bushings 6 is ensured.
Wherein, the spherical gasket 4 is inserted into the connecting hole 11 in a clearance fit way to be matched with the wear-resistant lining 6. Through the cooperation of wear-resisting bush 6 and spherical gasket 4 in connecting hole 11, make spherical gasket 4 by circumferential direction location, restrict the rotation of spherical gasket 4, drive spherical gasket 4 rotation when preventing planetary gear 3 rotation, avoid spherical gasket 4 to the wearing and tearing of poor shell 1.
Wherein, one surface of the spherical gasket 4 matched with the differential shell 1 is provided with an annular bulge 41 which is in clearance fit and stretches into the connecting hole 11, the annular bulge 41 is provided with a matching groove 42, the inner end of the wear-resistant lining 6 is provided with an end bulge 61 corresponding to the matching groove 42, and the end bulge 61 stretches into the matching groove 42. The wear-resistant bush 6 is pressed in the connecting hole 11 in an interference manner, and cannot rotate in the connecting hole 11, the spherical gasket 4 is circumferentially positioned by the wear-resistant bush 6 by the cooperation of the end protrusion 61 and the cooperation groove 42, and cannot rotate along with the automation of the planetary gear 3, so that the rotation of the spherical gasket 4 is limited.
Wherein, the matching grooves 42 are arc grooves, and the number of the matching grooves 42 is two, which are symmetrically distributed on the annular bulge 41. The fitting groove 42 is conveniently fitted in quick alignment with the end projection 61 in the spherical spacer 4 mounted to the jet lag 1.
Wherein the wall thickness of the wear-resistant lining 6 is not less than 5 mm. The wear-resistant bushing 6 needs to have a certain thickness, so that the aperture of the connecting hole 11 is increased by at least 10 cm, the stress area is increased, the stress concentration is avoided, the surface pressure of the connecting hole is reduced, the diameter of the end part of the planet gear shaft 2 is not reduced due to the addition of the wear-resistant bushing 6, and the strength of the planet gear shaft 2 is ensured. The wear-resistant lining 6 is a metal lining, and has good wear resistance and long service life.
The foregoing disclosure of embodiments of the present utility model has been fully described with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some of the embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Claims (6)
1. The assembly structure of the differential shell and the planetary gear shaft comprises a differential shell, the planetary gear shaft arranged in the differential shell, a planetary gear sleeved on the planetary gear shaft, and a spherical gasket clamped between the planetary gear and the differential shell, wherein the end parts of the planetary gear shaft respectively extend into connecting holes on the differential shell, and one end of the planetary gear shaft is positioned with the differential shell through a positioning pin, and the assembly structure is characterized in that: the aperture of the connecting hole is increased, the wear-resistant bushing is pressed in the connecting hole in an interference manner, the end part of the planetary gear shaft extends into the wear-resistant bushing, and the wear-resistant bushing is matched with the spherical gasket to limit the rotation of the spherical gasket.
2. The assembly structure of the differential case and the planetary gear shaft according to claim 1, wherein: the outer wall of the wear-resistant bushing is provided with a positioning bulge along the axial direction, the hole wall of the connecting hole is provided with a positioning groove corresponding to the positioning bulge, and the positioning bulge is embedded into the positioning groove along with the interference press-fitting of the wear-resistant bushing into the connecting hole, so that the pin hole on the wear-resistant bushing is aligned with the pin hole on the differential shell.
3. The assembly structure of the differential case and the planetary gear shaft according to claim 1, wherein: the spherical gasket is in clearance fit and extends into the connecting hole to be matched with the wear-resistant lining.
4. The assembly structure of the differential case and the planetary gear shaft according to claim 3, wherein: the spherical gasket and the differential shell are matched with each other, one surface of the spherical gasket is provided with an annular bulge which is in clearance fit and stretches into the connecting hole, the annular bulge is provided with a matching groove, the inner end of the wear-resistant lining is provided with an end bulge corresponding to the matching groove, and the end bulge stretches into the matching groove.
5. The assembly structure of the differential case and the planetary gear shaft according to claim 4, wherein: the matching grooves are arc-shaped grooves, and the number of the matching grooves is two, and the matching grooves are symmetrically distributed on the annular protrusion.
6. The assembly structure of the differential case and the planetary gear shaft according to claim 1, wherein: the wall thickness of the wear-resistant lining is not less than 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322486764.3U CN220828493U (en) | 2023-09-13 | 2023-09-13 | Assembly structure of differential shell and planetary gear shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322486764.3U CN220828493U (en) | 2023-09-13 | 2023-09-13 | Assembly structure of differential shell and planetary gear shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220828493U true CN220828493U (en) | 2024-04-23 |
Family
ID=90727523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322486764.3U Active CN220828493U (en) | 2023-09-13 | 2023-09-13 | Assembly structure of differential shell and planetary gear shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220828493U (en) |
-
2023
- 2023-09-13 CN CN202322486764.3U patent/CN220828493U/en active Active
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