CN103994196A - Differential mechanism - Google Patents
Differential mechanism Download PDFInfo
- Publication number
- CN103994196A CN103994196A CN201410241707.1A CN201410241707A CN103994196A CN 103994196 A CN103994196 A CN 103994196A CN 201410241707 A CN201410241707 A CN 201410241707A CN 103994196 A CN103994196 A CN 103994196A
- Authority
- CN
- China
- Prior art keywords
- differential
- wheel shaft
- planet
- planetary
- differential shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005121 nitriding Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H48/42—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/037—Gearboxes for accommodating differential gearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0493—Gearings with spur or bevel gears
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a differential mechanism comprising a differential shell and a rotating gear set arranged in the differential shell. The differential shell comprises a differential shell body (8) and a differential shell cover (9) fixedly connected with the differential shell body (8). The differential shell body (8) and the differential shell cover (9) are arrayed in the axis direction. The rotating gear set comprises planetary gears (1), a planetary axle assembly and half axle gears (2). The number of the planetary gears (1) is three or more, and the planetary gears are evenly distributed in the circumferential direction of the differential shell. The planetary axle assembly comprises planetary axles, and the axes of the planetary axles are located on the same plane. The half axle gears (2) are meshed with the planetary gears (1). The strength of the differential shell is effectively improved, and the rotating gear set is convenient to install; moreover, rotation stability of the half axle gears and the planetary gears after meshing is effectively improved, and then operation noise is lowered.
Description
Technical Field
The invention relates to the technical field of automobile equipment, in particular to a differential mechanism.
Background
The existing differential shell is integral, two planet wheels are arranged in the differential shell, and the planet wheels are arranged in the differential shell through a window arranged on the differential shell (hereinafter referred to as the differential shell).
Referring to fig. 1-4, fig. 1 is a first structural schematic diagram of a differential case in the prior art; FIG. 2 is a second schematic diagram of a differential case of the prior art; FIG. 3 is a top view of FIG. 1; fig. 4 is a top view of fig. 2.
Two windows 011 are symmetrically arranged on the differential case 01, and because the differential case 01 is of an integral structure, the planetary gear and the side gear of the differential mechanism are both required to be installed in the differential case 01 through the windows 011. The size of the window 011 is large, so that the strength of the inferior shell 01 is not high; in addition, the planet shafts which are rotationally matched with the planet gears can only be fixed on the mounting through holes 012 between the two windows 011, so that the number of the planet gears is two, the distance between the planet gears is larger, and the noise of the differential is larger in the working process.
Therefore, how to improve the poor shell strength and reduce the running noise is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a differential mechanism to improve the differential case strength and reduce the operation noise.
In order to achieve the purpose, the invention provides the following technical scheme:
a differential mechanism comprises a differential shell and a rotating gear set arranged in the differential shell, wherein the differential shell comprises a differential shell body and a differential shell cover fixedly connected with the differential shell body, and the differential shell body and the differential shell cover are arranged along the axial direction;
the rotation gear set includes:
the number of the planet gears is more than three, and the planet gears are uniformly distributed along the circumferential direction of the differential shell;
the planet shaft assembly comprises a planet wheel shaft, and the axes of the planet wheel shaft are positioned on the same plane;
a side gear in mesh with the planet gear.
Preferably, in the differential, the number of the planetary gears is four.
Preferably, in the differential, the planet shaft assembly further includes a carrier, and the planet shaft is disposed on the carrier;
the planet wheel shafts comprise a first planet wheel shaft and two second planet wheel shafts, the bracket is arranged in the middle of the first planet wheel shaft, the two second planet wheel shafts are symmetrically arranged on two sides of the first planet wheel shaft, and the axis of each second planet wheel shaft is perpendicular to the axis of the first planet wheel shaft.
Preferably, in the differential, the planetary wheel shaft is provided with an oil passage flat position.
Preferably, in the differential, the differential case body is provided with a fixing through hole for fixing the planetary wheel shaft, and an end of the planetary wheel shaft is higher than an outer surface of the fixing through hole;
the differential mechanism is sleeved on the outer wall of the differential shell, and the inner ring of the driven gear on the outer wall of the differential shell abuts against the end part of the planetary wheel shaft.
Preferably, in the differential, the differential case body and the differential case cover are fixed to each other by a bolt for fixing the driven gear to the differential case.
Preferably, in the differential mechanism, the differential case body is evenly provided with a plurality of oil inlet holes along the circumferential direction.
Preferably, in the differential, the differential case body and the differential case cover are positioned by a seam allowance.
Preferably, in the differential, one end of the planetary gear, which is far away from the teeth, is sleeved with a spherical spacer which is subjected to soft nitriding treatment.
Preferably, in the differential, a soft-nitrided half-axle gasket is sleeved on one end of the side gear, which is far away from the teeth.
According to the differential mechanism provided by the invention, the number of the planetary gears is more than three, the rotating gear set is inconvenient to install in the differential shell due to the increase of the number of the planetary gears, and the differential shell is designed into a split structure in which the differential shell body is matched with the differential shell cover, so that an overlarge rotating gear set installation opening is prevented from being formed in the differential shell, the strength of the differential shell is effectively improved, and the rotating gear set is convenient to install. Compared with the prior art, the number of the planet gears is increased, the rotating stability of the meshed half axle gear and the planet gear is effectively improved, and the running noise is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a first structure of a differential case in the prior art;
FIG. 2 is a second schematic diagram of a differential case of the prior art;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a top view of FIG. 2;
wherein,
a differential shell-01, a window-011 and an installation through hole-012;
FIG. 5 is a schematic structural diagram of a differential according to an embodiment of the present invention;
FIG. 6 is a schematic sectional view taken along section A-A in FIG. 5;
FIG. 7 is a schematic sectional view taken along section B-B in FIG. 5;
FIG. 8 is a schematic structural diagram of a planet axle assembly according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a planet axle assembly provided by an embodiment of the present invention;
FIG. 10 is a left side view of a differential provided by an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a rotation gear set according to an embodiment of the present invention.
Wherein,
the differential gear comprises a planetary gear-1, a half axle gear-2, a first planetary wheel shaft-3, a second planetary wheel shaft-4, a support-5, a spherical gasket-6, a half axle gasket-7, a differential shell body-8, an oil inlet-81 and a differential shell cover-9.
Detailed Description
The invention discloses a differential mechanism, which aims to improve the strength of a differential shell and reduce the running noise.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 5, 6 and 7, fig. 5 is a schematic structural diagram of a differential according to an embodiment of the present invention; FIG. 6 is a schematic sectional view taken along section A-A in FIG. 5; fig. 7 is a cross-sectional view taken along line B-B in fig. 5.
The differential mechanism provided by the embodiment of the invention comprises a differential shell and a rotating gear set arranged in the differential shell, wherein the differential shell comprises a differential shell body 8 and a differential shell cover 9 fixedly connected with the differential shell body 8, and the differential shell body 8 and the differential shell cover 9 are arranged along the axial direction; the rotation gear train includes: the number of the planet gears 1 is more than three, and the planet gears 1 are uniformly distributed along the circumferential direction of the differential shell; the planet shaft assembly comprises a support 5 and a planet wheel shaft arranged on the support 5, and the axes of the planet wheel shafts are positioned on the same plane; the side gear 2, the side gear 2 meshes with the planetary gear 1.
According to the differential provided by the embodiment of the invention, the number of the planetary gears 1 is more than three, and the rotating gear sets are inconvenient to install in the differential case due to the increase of the number of the planetary gears 1, so that the differential case is designed into a split structure in which the differential case body 8 is matched with the differential case cover 9, that is, an overlarge rotating gear set installation opening is prevented from being arranged on the differential case, the differential case strength is effectively improved, and the rotating gear sets are convenient to install. Compared with the prior art, the planetary gear 1 is increased in number, the stability of rotation of the meshed half axle gear 2 and the planetary gear 1 is effectively improved, and the operation noise is reduced.
Preferably, the number of the planetary gears 1 is four.
As shown in fig. 8 and fig. 9, in the differential provided in the embodiment of the present invention, the planet axle assembly further includes a carrier 5, and the planet axle is disposed on the carrier 5; the planet wheel shafts comprise a first planet wheel shaft 3 and two second planet wheel shafts 4, the bracket 5 is arranged in the middle of the first planet wheel shaft 3, the two second planet wheel shafts 4 are symmetrically arranged at two sides of the first planet wheel shaft 3, and the axes of the second planet wheel shafts 4 are vertical to the axis of the first planet wheel shaft 3. The first planetary wheel shaft 3 is a long wheel shaft, the second planetary wheel shaft 4 is a short wheel shaft, and the first planetary wheel shaft and the second planetary wheel shaft are fixed through a support 5 to form a cross-shaped planetary shaft assembly.
The planet axle assembly can also be provided with two long axle shafts, the middle parts of the two long axle shafts are provided with grooves, the depth and the width of each groove are larger than or equal to the radius of the long axle shaft, and the grooves of the two long axle shafts are mutually matched to form the cross-shaped planet axle assembly.
In order to facilitate the lubrication of the planetary gear 1, an oil duct flat position a is arranged on the planetary gear shaft. And lubricating oil lubricates the planetary gear 1 on the planetary gear shaft along the oil passage flat position a on the planetary gear shaft through the oil passage flat position a.
Further, an oil inlet is arranged in the middle of the bracket 5.
At present, a planetary wheel shaft is fixed in a differential shell through a pin, namely a pin hole needs to be machined in the differential shell, so that the machining difficulty of the differential shell is increased, stress concentration is easy to occur, and the overall strength of the differential shell is reduced. In the embodiment of the invention, the differential shell body 8 is provided with a fixing through hole for fixing the planet wheel shaft, and the end part of the planet wheel shaft is higher than the outer surface of the fixing through hole; the differential mechanism is sleeved with the inner ring of the driven gear on the outer wall of the differential shell and is abutted against the end part of the planet wheel shaft. According to the differential provided by the embodiment, the planetary wheel shaft is directly pressed through the driven gear, so that the effect of fixing the planetary wheel shaft is achieved, pin hole machining is avoided, the machining difficulty of the differential shell is reduced, and further the machining cost is reduced; and, the overall strength of the differential case is improved.
The differential case body 8 and the differential case cover 2 are fixed by bolts for fixing the driven gear to the differential case. The bolt passes poor cap 2, poor shell body 8 and driven gear in proper order promptly, through the external screw thread of bolt and the bolt hole internal thread cooperation on the driven gear. And the differential shell cover 2, the differential shell body 8 and the driven gear are fixed by screwing the bolts.
As shown in fig. 10, in order to facilitate the entry of the lubricating oil, the differential case body 8 is evenly provided with a plurality of oil inlet holes 81 along the circumferential direction.
The differential shell body 8 and the differential shell cover 2 are positioned through a seam allowance. In this embodiment, the differential case cover 2 is provided with a male seam allowance, and the differential case body 8 is provided with a female seam allowance matched with the differential case body.
As shown in fig. 11, in order to reduce the frictional loss. One end of the planetary gear 1, which is far away from the teeth, is sleeved with a spherical gasket 6 which is subjected to soft nitriding treatment. One end of the half axle gear 2, which is far away from the teeth, is sleeved with a half axle gasket 7 which is subjected to soft nitriding treatment.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The differential mechanism comprises a differential shell and a rotating gear set arranged in the differential shell, and is characterized in that the differential shell comprises a differential shell body (8) and a differential shell cover (9) fixedly connected with the differential shell body (8), and the differential shell body (8) and the differential shell cover (9) are arranged along the axial direction;
the rotation gear set includes:
the number of the planet gears (1) is more than three, and the planet gears (1) are uniformly distributed along the circumferential direction of the differential shell;
the planet shaft assembly comprises a planet wheel shaft, and the axes of the planet wheel shaft are positioned on the same plane;
a side gear (2), the side gear (2) being in mesh with the planet gear (1).
2. Differential according to claim 1, characterized in that the number of planetary gears (1) is four.
3. The differential of claim 2, characterized in that the planetary axle assembly further comprises a carrier (5), the planetary axle being disposed on the carrier (5);
the planet wheel shafts comprise a first planet wheel shaft (3) and two second planet wheel shafts (4), the bracket (5) is arranged in the middle of the first planet wheel shaft (3), the two second planet wheel shafts (4) are symmetrically arranged on two sides of the first planet wheel shaft (3), and the axis of each second planet wheel shaft (4) is perpendicular to the axis of the first planet wheel shaft (3).
4. The differential of claim 3, characterized in that the planet wheel shaft is provided with an oil gallery flat (a).
5. The differential gear according to claim 1, characterized in that the differential case body (8) is provided with a fixing through hole for fixing the planetary wheel shaft, and the end part of the planetary wheel shaft is higher than the outer surface of the fixing through hole;
the differential mechanism is sleeved on the outer wall of the differential shell, and the inner ring of the driven gear on the outer wall of the differential shell abuts against the end part of the planetary wheel shaft.
6. Differential according to claim 5, characterised in that the differential housing body (8) is secured to the differential housing cover (2) by means of bolts which secure the driven gear to the differential housing.
7. The differential of claim 1, characterized in that the differential case body (8) is circumferentially provided with a plurality of oil inlet holes (81) uniformly.
8. Differential according to claim 1, characterized in that the differential body (8) and the differential cover (2) are positioned by means of a spigot.
9. Differential according to claim 1, characterised in that the end of the planet gear (1) remote from the teeth is provided with a spherical pad (6) which is soft nitrided.
10. The differential of claim 1, characterized in that the end of the side gear (2) remote from the teeth is fitted with a soft nitrided side spacer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410241707.1A CN103994196A (en) | 2014-06-03 | 2014-06-03 | Differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410241707.1A CN103994196A (en) | 2014-06-03 | 2014-06-03 | Differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103994196A true CN103994196A (en) | 2014-08-20 |
Family
ID=51308462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410241707.1A Pending CN103994196A (en) | 2014-06-03 | 2014-06-03 | Differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103994196A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030078131A1 (en) * | 2001-10-23 | 2003-04-24 | Makoto Nishiji | Combined differential gear device |
| CN1531635A (en) * | 2002-08-02 | 2004-09-22 | 株式会社音户工作所 | Differiential device for vehicle |
| EP1460315A2 (en) * | 2003-03-19 | 2004-09-22 | Nissan Motor Co., Ltd. | Differential and differential case |
| CN101292097A (en) * | 2005-10-20 | 2008-10-22 | 德纳重型车辆系统集团有限责任公司 | Lightweight differential case half |
| CN101482165A (en) * | 2008-03-28 | 2009-07-15 | 北京交通大学 | Differential gear with high bearing capacity |
| CN201731037U (en) * | 2010-07-27 | 2011-02-02 | 高兴龙 | Vehicle high slip planetary gear type differential device |
| CN203926676U (en) * | 2014-06-03 | 2014-11-05 | 柳州五菱汽车有限责任公司 | Differential mechanism |
-
2014
- 2014-06-03 CN CN201410241707.1A patent/CN103994196A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030078131A1 (en) * | 2001-10-23 | 2003-04-24 | Makoto Nishiji | Combined differential gear device |
| CN1531635A (en) * | 2002-08-02 | 2004-09-22 | 株式会社音户工作所 | Differiential device for vehicle |
| EP1460315A2 (en) * | 2003-03-19 | 2004-09-22 | Nissan Motor Co., Ltd. | Differential and differential case |
| CN101292097A (en) * | 2005-10-20 | 2008-10-22 | 德纳重型车辆系统集团有限责任公司 | Lightweight differential case half |
| CN101482165A (en) * | 2008-03-28 | 2009-07-15 | 北京交通大学 | Differential gear with high bearing capacity |
| CN201731037U (en) * | 2010-07-27 | 2011-02-02 | 高兴龙 | Vehicle high slip planetary gear type differential device |
| CN203926676U (en) * | 2014-06-03 | 2014-11-05 | 柳州五菱汽车有限责任公司 | Differential mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 蒋运动 唐作厚: "《汽车底盘构造与维修》", 31 August 2013, 北京理工大学出版社 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 545007 Liuzhou Hexi Road, the Guangxi Zhuang Autonomous Region, No. 18 Applicant after: Guangxi company limited of automobile group Applicant after: Liuzhou Wuling Automobile Industry Co., Ltd. Address before: 545007 Liuzhou Hexi Road, the Guangxi Zhuang Autonomous Region, No. 18 Applicant before: Liuzhou Wuling Motors Co., Ltd. Applicant before: Liuzhou Wuling Automobile Industry Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: WULING AUTOMOBILE CO., LTD., LIUZHOU TO: GUANGXI PROVINCE AUTOMOBILE GROUP CO., LTD. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140820 |
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| RJ01 | Rejection of invention patent application after publication |