CN110469650A - Differential mechanism - Google Patents
Differential mechanism Download PDFInfo
- Publication number
- CN110469650A CN110469650A CN201810446960.9A CN201810446960A CN110469650A CN 110469650 A CN110469650 A CN 110469650A CN 201810446960 A CN201810446960 A CN 201810446960A CN 110469650 A CN110469650 A CN 110469650A
- Authority
- CN
- China
- Prior art keywords
- differential
- shoulder
- differential case
- planet
- shaft
- 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
- 230000007246 mechanism Effects 0.000 title abstract description 10
- 238000003754 machining Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
- F16H48/10—Differential gearings with gears having orbital motion with orbital spur 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The present invention relates to a kind of differential mechanisms.The differential mechanism includes differential casing and planetary gear shaft, the planetary gear shaft is arranged in the differential carrier body and for rotating together with the differential casing, wherein, the planetary gear shaft includes first end and the second end, and the first end and the second end each extend to the outside of the differential casing；The first end includes the shaft shoulder, and the shaft shoulder has the first end face to recline with the differential casing；The second end includes groove, and snap ring engages in the groove and is pressed against on the differential casing.Differential mechanism according to the present invention has the advantages that be simple to manufacture, is easy to assembly.
Description
Technical Field
The present invention relates to the field of vehicles, and in particular, to differentials in vehicles.
Background
The angular velocities of the left and right drive wheels are often not equal during vehicle travel. In this case, if a differential is not provided on the vehicle and both drive wheels are fixed to the same rigid rotating shaft, a roll-over phenomenon inevitably occurs in the drive wheels. This phenomenon may lead to wear of the tires and to a loss of power, and may even result in the vehicle not being able to steer. Therefore, a differential is used in a vehicle to cause the vehicle to achieve a differential speed between left and right drive wheels when the vehicle is traveling in a non-straight line, so that the vehicle travels normally.
The differential includes a differential case and planet pins disposed within the differential case and adapted to rotate with the differential case. The planet gear shaft is generally limited by a positioning pin, specifically, a through hole is radially arranged at one end of the planet gear shaft, the positioning pin passes through the through hole, and two ends of the positioning pin are fixed on a mounting hole of the differential case. In the above arrangement employing the positioning pin, if the interference between the positioning pin and the through hole on the pinion shaft is too small, the positioning pin may fall off from the through hole, and if the interference between the positioning pin and the through hole on the pinion shaft is too large, the pinion shaft may be broken by being subjected to too large a force at one end. In addition, in order to machine the through-hole on the pinion shaft, a part of the surface on the pinion shaft needs to be ground to machine the through-hole, and the assembling steps are various.
Accordingly, a differential that is simple to manufacture and easy to assemble is desired.
Disclosure of Invention
The invention aims to provide a differential which is simple to manufacture and convenient to assemble.
The present invention provides a differential including a differential case and planet pins disposed within the differential case and adapted to rotate with the differential case,
wherein,
the planet gear shaft includes a first end and a second end, both of which extend outside of the differential case;
the first end portion includes a shoulder having a first end surface abutting the differential case;
the second end includes a groove in which a snap ring snaps and is pressed against the differential case.
According to an embodiment of the invention, the shoulder further has a first side surface abutting the differential case, wherein the first side surface is a portion of a side surface of the shoulder, and wherein the first side surface is at a smaller distance from an axis of the shoulder than a remaining portion of the side surface.
According to an embodiment of the invention, the first side is a rectangular plane.
According to an embodiment of the invention, the rest of the side surface of the shoulder is a cylindrical surface.
According to an embodiment of the invention, the differential case is provided with a first counter-plane for abutment with the first side face.
According to an embodiment of the invention, the first side face and the first corresponding plane are machined by means of machining.
In the differential gear according to the present invention, the positioning pins that are commonly used in the differential gear of the prior art are omitted, thereby accordingly omitting the machining of the through holes for the positioning pins on the pinion pins, and the corresponding machining step that requires grinding on a portion of the pinion pins for the convenience of machining the through holes, and also omitting the assembly step of the positioning pins. The differential mechanism of the invention can prevent the relative movement between the planet gear shaft and the differential mechanism shell by carrying out additional simple processing steps on the planet gear shaft. Therefore, the differential mechanism has the advantages of simple manufacture and convenient assembly.
Drawings
Fig. 1 shows a schematic structural view of a differential according to an embodiment of the present invention.
Fig. 2 shows a schematic structural view of a planet shaft according to an embodiment of the present invention.
Detailed Description
Specific embodiments of a differential according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and drawings are included to illustrate the principles of the invention, which is not to be limited to the preferred embodiments described, but is to be defined by the appended claims.
Fig. 1 shows a schematic structural view of a differential according to an embodiment of the present invention. Fig. 2 shows a schematic structural view of a planet shaft according to an embodiment of the present invention.
Hereinafter, a differential gear according to the present invention will be described with reference to fig. 1 and 2.
As shown in fig. 1, the differential 10 includes a differential case 12 and planet pins 11. The planet pins 11 are disposed within the differential case 12 and are for rotation with the differential case 12. Also, the pinion shaft 11 includes a first end portion 11A (i.e., an upper end in fig. 1) and a second end portion 11B (i.e., a lower end in fig. 1), both the first end portion 11A and the second end portion 11B extending to the outside of the differential case 12.
The pinion shaft according to the present invention is described in detail below with reference to fig. 2.
As shown in fig. 2, the first end portion 11A of the planet shaft 11 includes a shoulder 110. The shoulder 110 has a first end face 1101, the first end face 1101 being configured to abut the differential case 12 when the planet pins 11 are installed in the differential 10. The second end 11B of the planet shaft 11 includes a groove 111, and when the planet shaft 11 is mounted in the differential 10, the snap ring 13 is snapped into the groove 111 and the snap ring 13 is pressed against the differential case 12. Therefore, when the planet pins 11 are mounted in the differential 10, the planet pins 11 are prevented from moving in the axial direction thereof relative to the differential case 12 by the first end faces 1101 of the planet pins 11 and the snap rings 13 that are engaged in the grooves 111 both abutting against the differential case 12.
Further, as shown in fig. 2, the shoulder 110 at the first end 11A of the pinion shaft 11 has, in addition to the first end face 1101, a side face including a first side face 1102 and a remaining portion 1103 other than the first side face 1102, the first side face 1102 being a rectangular plane and the remaining portion 1103 being a cylindrical face, and the first side face 1102 being located at a smaller distance from the axis of the shoulder 110 than the remaining portion 1103 of the side face, the first side face 1102 being adapted to abut against the differential case 12 when the pinion shaft 11 is mounted in the differential 10. Accordingly, at a position of the differential case 12 abutting the first side surface 1102, a first corresponding plane for abutting the first side surface 1102 may be provided. Also, the first side 1102 and the first corresponding plane may be machined (e.g., milled). Therefore, when the planet shaft 11 is mounted in the differential 10, the planet shaft 11 is prevented from rotating relative to the differential case 12 by the first side surface 1102 of the planet shaft 11 abutting the differential case 12 because the first side surface 1102 is spaced from the axis of the shoulder 110 by a distance less than the distance of the remaining portion 1103 of the side surface from the axis.
Therefore, in the differential according to the present invention, the shoulder is provided at one end of the planet shaft, and the groove for engaging the snap ring is provided at the other end, so that the planet shaft can be prevented from moving in its axial direction relative to the differential case by both the first end surface of the shoulder and the snap ring abutting against the differential case. Furthermore, the shoulder may be provided with a first side surface for abutment with the differential case, and the first side surface may be located at a smaller distance from the axis of the shoulder than the remainder of the side surface, so that rotation of the planet pins relative to the differential case is prevented. In summary, in the differential gear according to the present invention, the positioning pins that are commonly used in the differential gear of the prior art are omitted, and thus the machining of the through holes for the positioning pins on the pinion pins is accordingly omitted, and the corresponding machining step that requires grinding on a portion of the pinion pins for the convenience of machining the through holes is omitted, as well as the assembling step of the positioning pins is also omitted. The differential mechanism of the invention can prevent the relative movement between the planet gear shaft and the differential mechanism shell by carrying out additional simple processing steps on the planet gear shaft. Therefore, the differential mechanism has the advantages of simple manufacture and convenient assembly.
It will be appreciated by those skilled in the art that the differential according to the present invention is not limited to the design of the first side surface as a rectangular plane or the remaining portion of the side surface of the shoulder as a cylindrical surface, but other designs may be employed depending on the actual situation, for example, the remaining portion of the side surface of the shoulder may be designed as a polygonal surface. Furthermore, it will be appreciated by those skilled in the art that the differential according to the present invention is not limited to providing a first corresponding flat surface on the differential case for abutment with the first side surface, and that it is also possible to utilize, for example, a flat surface or structure already present on the differential itself. Furthermore, the differential according to the present invention is not limited to machining the first side surface and the first corresponding plane by machining, and those skilled in the art may select other machining methods according to actual circumstances.
As described above, although the exemplary embodiments of the present invention have been described in the description with reference to the drawings, the present invention is not limited to the above-described embodiments, and the scope of the present invention should be defined by the claims and their equivalents.
Claims (6)
1. A differential (10) comprising a differential case (12) and planet pins (11), the planet pins (11) being disposed within the differential case (12) and for rotation with the differential case (12),
it is characterized in that the preparation method is characterized in that,
the planet gear shaft (11) includes a first end portion (11A) and a second end portion (11B), the first end portion (11A) and the second end portion (11B) each extending to an outside of the differential case (12);
the first end (11A) comprises a shoulder (110), the shoulder (110) having a first end face (1101) abutting the differential case (12);
the second end portion (11B) includes a groove (111), and a snap ring (13) is snapped into the groove (111) and pressed against the differential case (12).
2. The differential (10) according to claim 1, wherein the shoulder (110) further has a first side surface (1102) abutting the differential case (12), wherein the first side surface (1102) is a portion of a side surface of the shoulder (110), and wherein the first side surface (1102) is at a distance from an axis of the shoulder (110) that is less than a distance from the axis of a remaining portion (1103) of the side surface.
3. The differential (10) of claim 2, wherein the first side (1102) is a rectangular plane.
4. The differential (10) of claim 3, wherein the remainder (1103) of the side of the shoulder (110) is cylindrical.
5. The differential (10) according to claim 4, wherein the differential case (12) is provided with a first corresponding flat surface for abutment with the first side surface (1102).
6. The differential (10) of claim 5, wherein the first side surface (1102) and the first corresponding plane are machined by machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446960.9A CN110469650A (en) | 2018-05-11 | 2018-05-11 | Differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446960.9A CN110469650A (en) | 2018-05-11 | 2018-05-11 | Differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110469650A true CN110469650A (en) | 2019-11-19 |
Family
ID=68504341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810446960.9A Pending CN110469650A (en) | 2018-05-11 | 2018-05-11 | Differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110469650A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2833215Y (en) * | 2005-07-18 | 2006-11-01 | 杨聪辉 | Anti-rotation wheel hub bolt for vehicle |
| CN201884620U (en) * | 2010-11-16 | 2011-06-29 | 浙江吉利汽车研究院有限公司 | Fixing structure of planetary gear shaft of differential gear |
| CN202056159U (en) * | 2011-03-03 | 2011-11-30 | 宁波浩渤工贸有限公司 | Bolt for construction project |
| CN203023425U (en) * | 2012-12-10 | 2013-06-26 | 北汽福田汽车股份有限公司 | Limiting mechanism of planet gear shaft of differential mechanism, differential mechanism and vehicle |
| CN203161769U (en) * | 2013-02-26 | 2013-08-28 | 牛余训 | Anti-rotating bolt for connection of standard sections of tower crane |
| DE202013008953U1 (en) * | 2012-10-10 | 2014-02-18 | Eaton Corporation | Differential with two-part housing division by planet carrier wall |
| US20140179481A1 (en) * | 2012-10-10 | 2014-06-26 | Eaton Corporation | Differential having two-piece case split through planetary carrier wall |
| CN204755826U (en) * | 2015-06-18 | 2015-11-11 | 温岭市荣申机械配件厂 | Differential mechanism |
-
2018
- 2018-05-11 CN CN201810446960.9A patent/CN110469650A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2833215Y (en) * | 2005-07-18 | 2006-11-01 | 杨聪辉 | Anti-rotation wheel hub bolt for vehicle |
| CN201884620U (en) * | 2010-11-16 | 2011-06-29 | 浙江吉利汽车研究院有限公司 | Fixing structure of planetary gear shaft of differential gear |
| CN202056159U (en) * | 2011-03-03 | 2011-11-30 | 宁波浩渤工贸有限公司 | Bolt for construction project |
| DE202013008953U1 (en) * | 2012-10-10 | 2014-02-18 | Eaton Corporation | Differential with two-part housing division by planet carrier wall |
| US20140179481A1 (en) * | 2012-10-10 | 2014-06-26 | Eaton Corporation | Differential having two-piece case split through planetary carrier wall |
| CN203023425U (en) * | 2012-12-10 | 2013-06-26 | 北汽福田汽车股份有限公司 | Limiting mechanism of planet gear shaft of differential mechanism, differential mechanism and vehicle |
| CN203161769U (en) * | 2013-02-26 | 2013-08-28 | 牛余训 | Anti-rotating bolt for connection of standard sections of tower crane |
| CN204755826U (en) * | 2015-06-18 | 2015-11-11 | 温岭市荣申机械配件厂 | Differential mechanism |
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