CN202971804U - Differential mechanism - Google Patents
Differential mechanism Download PDFInfo
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- CN202971804U CN202971804U CN 201220638265 CN201220638265U CN202971804U CN 202971804 U CN202971804 U CN 202971804U CN 201220638265 CN201220638265 CN 201220638265 CN 201220638265 U CN201220638265 U CN 201220638265U CN 202971804 U CN202971804 U CN 202971804U
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- differential mechanism
- planet axis
- planetary
- planetary shaft
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- 230000007246 mechanism Effects 0.000 title claims abstract description 57
- 238000003801 milling Methods 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000010687 lubricating oil Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000314 lubricant Substances 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- 239000002243 precursor Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009183 running Effects 0.000 description 2
- 210000001138 tear Anatomy 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a differential mechanism installed on a front drive automobile. The differential mechanism comprises a planetary gear and a planetary shaft matching with the planetary gear. According to the differential mechanism, a milled flat position structure is arranged on the planetary shaft along the axial direction of the planetary shaft, and a flat position is arranged on the planetary shaft; during a gear rotation process, on one hand, an oil film can be formed between friction surfaces which can be fully lubricated, and abrasion is relieved significantly; on the other hand, lubricating oil can get in conveniently, friction pairs are well cooled, and oil viscosity decline caused by high temperature arising from friction is avoided. The structural design is based on a planetary shaft (a design of a cylindrical structure) in the prior art, the side of the periphery of the planetary shaft is milled to be a plane structure used for increasing fit tolerance between the planetary shaft and the planetary gear. Therefore, smoothness degree of lubricating oil flowing is increased. Meanwhile, lubricating oil can form an oil film conveniently, cooling effect on a planetary gear train is improved, reliability of a differential mechanism of a front drive automobile is improved, and driving safety is enhanced.
Description
Technical field
The utility model relates to the transmission device technical field, more particularly, and particularly a kind of differential mechanism.
Background technique
Differential mechanism: a kind of can make to rotatablely move reach two axles from an axle, and the latter can generally be made of with the differential attachment of different rotating speeds rotation each other gear, comprise that differential shell, planetary pinion and differential gear form.
Kinematic pair: two members directly contact and can produce being actively coupled of relative movement and are called kinematic pair.
The differential rate: refer to the difference degree of differential mechanism left and right output terminal rotating speed, the rotating speed difference is larger, and the differential rate is larger.
As everyone knows, for the non-four-wheel drive cars that often operates on the abominable road surface such as mudstone bad road, hill path, if do not configure the device such as automatic differential lock, differential mechanism reliability and life-span can't be guaranteed.Especially concerning precursor vehicle, front-wheel is deflecting roller and driving wheel, and differential mechanism is comparatively responsive to the road conditions reaction of wheel.Because this road surface is generally the sandstone road, wet and slippery hollow is many, the sharp turn is many, in the Vehicle Driving Cycle process, left and right sidesing driving wheel differential rate is frequent or continue higher, cause the differential mechanism kinematic pair to continue the unstable wear that runs up, even can because high-speed friction produces high temperature, cause the serious situation of differential mechanism kinematic pair sintering locking.
Forerunner's speed changer of installing on automobile in the prior art is a kind of integrated transmitting assemblies of differential mechanism, its advantage is that compact structure, boundary dimension are less, and be conducive to arrangement, reduce weight and center of gravity, do not use but be suitable on the abominable road conditions such as hill path and muddy road, therefore be mainly used on the passenger cars such as car, MPV.But, the forerunner is installed on vehicle in use, and speed changer will there are the following problems: as vehicle in use, general travel route is various states, some tracks are fine, have very poor-curved many, road surface is gravel road surface, hill path, muddy road surface etc., on abominable road surface, left and right sidesing driving wheel differential rate is frequent or continue higher when Vehicle Driving Cycle, run up between the differential mechanism kinematic pair so that the even high temperature sintering that sharply weares and teares, thereby break down.
In case the Vehicle Driving Cycle that forerunner's speed changer is installed is on the hill path or on muddy road surface the time, be very easy to cause differential mechanism frequent or continue to be in than discrepancy in elevation speed operating mode, because this structure can cause planet axis and planetary pinion hole insufficient lubrication, wear damage, so differential mechanism is easy to wear damage, life-span and reliability can't guarantee, have seriously influenced the user security use.
In sum, how to improve the reliability of precursor vehicle differential mechanism use to improve drive safety, become those skilled in the art's problem demanding prompt solution.
The model utility content
The technical problems to be solved in the utility model is for providing a kind of differential mechanism, and this differential mechanism can improve the reliability of precursor vehicle differential mechanism use to improve drive safety by its structural design.
For solving the problems of the technologies described above, the utility model provides a kind of differential mechanism, comprises planetary pinion and the planet axis adaptive with described planetary pinion,
Axially have along it on described planet axis and mill flat bit architecture.
Preferably, the flat bit architecture that mills that has on described planet axis is to milling flat bit architecture.
Preferably, described planetary pinion has the mounting hole that passes for described planet axis, and described mounting hole is dolioform along the cross section pass of its centerline direction, the two ends of described mounting hole wherein between the position convergent.
Preferably, described differential mechanism comprises the differential mechanism shell, fixes by bearing pin between described planet axis and described differential mechanism shell.
Preferably, described bearing pin is for having flexible pin.
The utility model provides a kind of differential mechanism, is installed on forerunner's automobile, comprises planetary pinion and the planet axis adaptive with planetary pinion, in the utility model, axially has along it on planet axis and mills flat bit architecture.Flat position is set on planet axis, in the gear rotation process, is beneficial between rubbing surface on the one hand and can forms oil film, rubbing surface obtains sufficient lubrication, greatly improve wearing and tearing, what be beneficial on the other hand lubricant oil enters and friction pair is formed good cooling, and the high temperature of avoiding rubbing causes oil viscosity to descend.Said structure design is on the basis of the planet axis (cylindrical-shaped structure design) that provides in the prior art, mill out a plane structure on peripheral sides with planet axis, for increasing the matching gap between planet axis and planet wheel, thereby improve the smooth and easy degree of lubricating oil flow, the lubricant oil of being more convenient for simultaneously forms oil film, the cooling effect of raising to planetary gear train improved the reliability of precursor vehicle differential mechanism use thus to improve drive safety.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is the partial structurtes schematic diagram of differential mechanism in a kind of embodiment of the utility model;
Fig. 2 is planetary partial structurtes schematic diagram in a kind of embodiment of the utility model;
Fig. 3 is section view of planet axis in a kind of embodiment of the utility model;
In Fig. 1 to Fig. 3, the corresponding relation of component names and reference character is:
Mounting hole a; Mill flat bit architecture b.
Embodiment
Core of the present utility model is for providing a kind of differential mechanism, and this differential mechanism mills flat bit architecture with its planet structural design of shaft for having, and by this structural design, can improve the reliability of precursor vehicle differential mechanism use to improve drive safety.
In order to make those skilled in the art understand better the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 2 and Fig. 3, wherein, Fig. 1 is the partial structurtes schematic diagram of differential mechanism in a kind of embodiment of the utility model; Fig. 2 is planetary partial structurtes schematic diagram in a kind of embodiment of the utility model; Fig. 3 is section view of planet axis in a kind of embodiment of the utility model.
The utility model provides a kind of differential mechanism, is installed on forerunner's automobile, comprises planetary pinion 1 and the planet axis 2 adaptive with planetary pinion 1, in the utility model, axially has along it on planet axis 2 and mills flat bit architecture a.Said structure design is the planet axis 2(cylindrical-shaped structure design that provides in the prior art) the basis on, mill out a plane structure on peripheral sides with planet axis 2, for increasing the matching gap between planet axis 2 and planet wheel, thereby improve the smooth and easy degree of lubricating oil flow, the lubricant oil of being more convenient for simultaneously forms oil film, the cooling effect of raising to planetary gear train improved the reliability of precursor vehicle differential mechanism use thus to improve drive safety.
The below needs concrete analysis is made in the appearance of differential mechanism Sintering Problem in prior art:
In the prior art, during planet axis 2 running relative to planetary pinion 1, because its matching gap is less, cause the lubricant oil circulation not smooth, cause the problem of insufficient lubrication between kinematic pair, make planet axis 2 easily wear and tear, even due to the rubbing surface lack of lubrication, planet axis 2 produces high temperature sintering, differential mechanism locking with planetary pinion 1 high-speed friction, cause vehicle accident in stays, the safety of impact driving when serious.
The insufficient lubrication problem occurs former because:
1, planet axis 2 is straight line with the molded line that coordinates of planetary pinion 1, and the ideal trajectory of both runnings is cylndrical surface, so rubbing surface is large, needs lubricants capacity many, as crossing shortage of oil, and can sharp wear, even high temperature sintering;
2, matching gap is difficult to select, and is as too small in the gap, crosses shortage of oil between kinematic pair, and wearing and tearing can aggravate even to cause high temperature sintering; As excessive, in planet axis 2 operation process relative to planet wheel, the situation of both axial offsets appears because of stressed meeting, and make planet wheel hole edges at two ends contact with planet axis 2 lines, thus unstable wear.
3, because planet axis 2 nothing in differential carrier is fixing, relative differential carrier, planet axis 2 can be every now and then by planet wheel with rotating together, can cause like this planet axis 2 wearing and tearing to occur with the cambered surface that coordinates of differential carrier, thereby destroy the dimensional chain of whole planetary gear train, when planet axis 2 was stressed, differential mechanism will certainly abnormal sound, will form vicious circle in conjunction with " reason 1 ".The differential mechanism reliability can't guarantee.
In a specific embodiment party of the present utility model, the flat bit architecture a that mills that has on planet axis 2 is to milling flat bit architecture.From the above, process on planet axis 2 and mill flat bit architecture a, can either increase lubricated to planet axis 2, can also avoid simultaneously planet axis 2 transition heatings.Mill in order to take full advantage of the structural advantage that flat bit architecture a brings, planet axis 2 has adopted milling flat bit architecture in the present embodiment, this structural design can either guarantee planet axis 2 normal rotation, also increase simultaneously lubrication effect, avoided the appearance of the excess Temperature situation that planet axis 2 causes due to friction.
Particularly, planetary pinion 1 has the mounting hole b that passes for planet axis 2, and mounting hole b is dolioform along the cross section pass of its centerline direction, the two ends of mounting hole b wherein between the position convergent, need to prove at this, the waist drum line adopts the smooth structure design.
For planet axis 2 is fixed, the differential mechanism that the utility model provides also is provided with differential mechanism shell 3, fixing by bearing pin 4 between planet axis 2 and differential mechanism shell 3, so can make and be relatively-stationary structure between planet axis 2 and differential mechanism shell 3, avoid planet axis 2 in the situation of working and rotating when turning round, reduced the stability of differential mechanism.Can also protect the part (such as planet wheel, planet axis 2 etc.) that is arranged in its shell owing to being provided with differential mechanism shell 3, improve the Security of differential mechanism.
Particularly, bearing pin 4 adopts has the bearing pin 4 that elastic material is made, and for example adopts the pin that spring steel material is made that planet axis 2 and differential carrier are fixed.
The differential mechanism that the utility model provides designs by said structure, processes owing to planet axis 2 having been carried out milling flat bit architecture a, has following advantage:
1, flat position is set on planet axis 2, in the gear rotation process, be beneficial between rubbing surface on the one hand and can form oil film, rubbing surface obtains sufficient lubrication, greatly improve wearing and tearing, what be beneficial on the other hand lubricant oil enters and friction pair is formed good cooling, and the high temperature of avoiding rubbing causes oil viscosity to descend;
2, planetary pinion 1 molded line of internal bore is designed to waist-drum-shaped, makes in capable axle and planetary pinion 1 movement process as line contacts, and friction area is decreased to minimum, is beneficial to entering of lubricant oil, is beneficial to sufficient lubrication.In addition, the reducing of rubbing surface lowered fricative heat greatly, avoids the kinematic pair high temperature sintering;
3, planet wheel surface granosealing, phosphorization are to be beneficial to the surface and to depend on oil film, and self-lubricating function is arranged.Like this, just further reduce the wearing and tearing between planet axis 2 and planet wheel;
4, resilient key restriction planet axis 2 is set between planet axis 2 and differential shell and rotates, avoided wearing and tearing mutually between planet axis 2 and differential carrier, thereby the situation of vicious circle occurs.At utmost guarantee the differential mechanism reliability.
Above a kind of differential mechanism provided by the utility model is described in detail.Used specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (5)
1. a differential mechanism, comprise planetary pinion (1) and the planet axis (2) adaptive with described planetary pinion (1), it is characterized in that,
Described planet axis (2) upward axially has along it mills flat bit architecture (a).
2. differential mechanism according to claim 1, is characterized in that, the flat bit architecture (a) that mills that has on described planet axis (2) is to milling flat bit architecture.
3. differential mechanism according to claim 1, it is characterized in that, described planetary pinion (1) has the mounting hole (b) that passes for described planet axis (2), described mounting hole (b) is dolioform along the cross section pass of its centerline direction, the two ends of described mounting hole (b) wherein between the position convergent.
4. the described differential mechanism of according to claim 1 to 3 any one, is characterized in that, described differential mechanism comprises differential mechanism shell (3), and is fixing by bearing pin (4) between described planet axis (2) and described differential mechanism shell (3).
5. differential mechanism according to claim 4, is characterized in that, described bearing pin (4) is for having flexible pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220638265 CN202971804U (en) | 2012-11-28 | 2012-11-28 | Differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220638265 CN202971804U (en) | 2012-11-28 | 2012-11-28 | Differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971804U true CN202971804U (en) | 2013-06-05 |
Family
ID=48512881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220638265 Expired - Lifetime CN202971804U (en) | 2012-11-28 | 2012-11-28 | Differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971804U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648344A (en) * | 2020-12-28 | 2021-04-13 | 合肥波林新材料股份有限公司 | Planet gear single-plate staggered tooth back clearance adjustable planet speed reducer |
-
2012
- 2012-11-28 CN CN 201220638265 patent/CN202971804U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648344A (en) * | 2020-12-28 | 2021-04-13 | 合肥波林新材料股份有限公司 | Planet gear single-plate staggered tooth back clearance adjustable planet speed reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGXI PROVINCE AUTOMOBILE GROUP CO., LTD. Free format text: FORMER NAME: WULING AUTOMOBILE CO., LTD., LIUZHOU |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 545007 Liuzhou Hexi Road, the Guangxi Zhuang Autonomous Region, No. 18 Patentee after: Guangxi Automobile Group Co.,Ltd. Patentee after: Liuzhou Wuling Automobile Industry Co.,Ltd. Address before: 545007 Liuzhou Hexi Road, the Guangxi Zhuang Autonomous Region, No. 18 Patentee before: Liuzhou Wuling Motors Co.,Ltd. Patentee before: Liuzhou Wuling Automobile Industry Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |