CN202756571U - Corrected spiral bevel gear - Google Patents
Corrected spiral bevel gear Download PDFInfo
- Publication number
- CN202756571U CN202756571U CN 201220433454 CN201220433454U CN202756571U CN 202756571 U CN202756571 U CN 202756571U CN 201220433454 CN201220433454 CN 201220433454 CN 201220433454 U CN201220433454 U CN 201220433454U CN 202756571 U CN202756571 U CN 202756571U
- Authority
- CN
- China
- Prior art keywords
- gear
- bevel gear
- spiral bevel
- corrected
- tooth
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a corrected spiral bevel gear which comprises a planet gear and a half axle gear, wherein the planet gear and the half axle gear are meshed through arc teeth. Arc tooth corrected parameters of the planet gear and the half axle gear are helical angles from 1 degree to 10 degrees, pressure angles from 22.5 degrees to 25 degrees, and tooth crest height coefficients from 0 degree to 0.8 degree. By means of design of the corrected parameters, the arc teeth tend to be straight and short, and barrier free demoulding can be achieved after precision forging of the arc teeth. The corrected spiral bevel gear is machined through a precision forging forming process, and therefore manufacturing working hours and manufacturing cost are reduced greatly, mating use with an automobile differential mechanism is facilitated furthermore, and transmission quality of the automobile differential mechanism is benefited.
Description
Technical field
The utility model relates to a kind of bevel gear, and specifically, the utility model relates to the supporting correction spiral bevel gear of a kind of suitable automobile differential, and the curved tooth of this gear is through revising design, and easy demoulding during finish forge belongs to metal pattern pressing formation technical field.
Background technique
Traditional automobile differential forms box of tricks by two differential gears, two planetary pinions and planet carrier.Supporting differential gear and planetary pinion are straight bevel gear, and be succinct because of the straight-tooth flank of tooth, adopts study on precision forging technology can realize producing in enormous quantities.However, there is certain structural imperfection in the flank of tooth of straight bevel gear, and greatest drawback is that straight bevel gear engagement is the contact of full-depth tooth upper thread, and circular tooth contact is to foozle, alignment error sensitivity relatively, easily produces EDGE CONTACT and worsens transmission quality.In order to improve the transmission quality of automobile differential, the industry adopts the axial modification technology to improve the meshing quality of straight bevel gear usually, namely on the flank of tooth along tooth depth, the correction of the flank shape of tooth length direction, the flank of tooth becomes " crowned teeth " after correction of the flank shape.But axial modification mode and profiling quantity are difficult to determine in the trial-manufacturing process, need to detect and could finally determine by several times trial cut method and meshing quality.Along with high speed, heavy-load automobile improve the requirement of transmission quality, the differential mechanism of equipped " crowned teeth " does not reach usage requirement.Spiral Bevel Gear Transmission is Local Instantaneous point contact in theory, and the engagement contact ratio is large, and is insensitive to foozle, alignment error, stable drive, and it is supporting that this category feature is particularly suitable for automobile differential.The spiral bevel gear curved tooth structure characteristic of conventional design is the solid surface structure, there is the practical problem of demoulding difficulty in forging, has seriously restricted supporting in automobile differential of spiral bevel gear.Spiral bevel gear can be realized accurate manufacturing with cutting working method, but the worker duration, manufacture cost is large, and it is supporting equally also to be not suitable for automobile differential.
The model utility content
The utility model proposes a kind of correction spiral bevel gear mainly for the practical problem of the difficult demoulding of the spiral bevel gear of conventional design, and it is little that this gear and the spiral bevel gear curved tooth of conventional design are compared helix angle, and pressure angle is large, and the high coefficient of tooth item is little, easy demoulding during finish forge.
The utility model is achieved through the following technical solutions technical goal.
Revise spiral bevel gear, it comprises planetary pinion and the differential gear that is meshed with curved tooth.Its improvements are: the curved tooth corrected parameter of described planetary pinion and differential gear is helix angle 1
0～10
0, pressure angle 22.5
0～25
0And addendum coefficient 0.7～0.8.
In the said structure, need to adjust helix angle, pressure angle and addendum coefficient according to concrete tooth profile parameter as the gear with curved teeth of planetary pinion and differential gear.The adjustment of helix angle need to take into account the size of bearing size, contact ratio of directly depanning, axial force.Whether pressure angle is mainly considered direct depanning favourable.Addendum coefficient will consider whether tooth top comes to a point and the size of contact ratio.
The utility model compared with prior art has following good effect:
1, the flank engagement of curved tooth is originally as the part contact, and profile of tooth correction design is easy, easily realization;
2, helix angle and the increase pressure angle by reducing curved tooth, and these improve the measure of curved-surface structure to adopt short tooth system, so that the demoulding is accessible behind the spiral gear finish forge, is conducive to use study on precision forging technology and realizes in enormous quantities, low-cost production;
Be the instantaneous point contact when 3, revising Spiral Bevel Gear Transmission, be conducive to improve smoothness of operation and the bearing capacity of transmission.
Description of drawings
Fig. 1 uses the planetary pinion of the utility model making and differential gear forms transmission in automobile differential structural representation.
Fig. 2 is the utility model planetary pinion finish forge tooth mode structure enlarged diagram, shows among the figure that the curved tooth structure is provided with obstacle to the demoulding.
Fig. 3 is the utility model differential gear finish forge tooth mode structure enlarged diagram, shows among the figure that the curved tooth structure is provided with obstacle to the demoulding.
Embodiment
The below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in further detail.
Correction spiral bevel gear shown in Fig. 1, it comprises planetary pinion and the differential gear that is meshed with curved tooth.The curved tooth corrected parameter of described planetary pinion 1 and differential gear 2 is helix angle 1
0～10
0, pressure angle 22.5
0～25
0And addendum coefficient 0.7～0.8.Planetary pinion 1 is 12 teeth in the present embodiment, and differential gear 2 is 18 teeth, and mating engagement is in automobile differential.In order to accomplish the accessible demoulding behind the finish forge, special with curved tooth by helix angle 1
0, pressure angle 25
0, addendum coefficient 0.775 is revised design.Owing to adopt above-mentioned parameter correction design, so that curved tooth is tending towards is straight, short short, can accomplish direct demold behind the finish forge.Revising spiral bevel gear processes with study on precision forging technology, when greatly reducing worker and manufacture cost, it is the instantaneous point contact when the most important thing is to revise Spiral Bevel Gear Transmission, smoothness of operation and the bearing capacity of transmission have been improved, be particularly suitable for the supporting application of automobile differential, be conducive to improve the transmission quality of automobile.
Claims (1)
1. correction spiral bevel gear, it comprises planetary pinion (1) and the differential gear (2) that is meshed with curved tooth; It is characterized in that: the curved tooth corrected parameter of described planetary pinion (1) and differential gear (2) is helix angle 1
0～10
0, pressure angle 22.5
0～25
0And addendum coefficient 0.7～0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220433454 CN202756571U (en) | 2012-08-29 | 2012-08-29 | Corrected spiral bevel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220433454 CN202756571U (en) | 2012-08-29 | 2012-08-29 | Corrected spiral bevel gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756571U true CN202756571U (en) | 2013-02-27 |
Family
ID=47735755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220433454 Expired - Fee Related CN202756571U (en) | 2012-08-29 | 2012-08-29 | Corrected spiral bevel gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202756571U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806724A (en) * | 2015-03-30 | 2015-07-29 | 江苏太平洋齿轮传动有限公司 | Automobile differential mechanism |
| CN105114598A (en) * | 2015-09-25 | 2015-12-02 | 江苏太平洋齿轮传动有限公司 | Relieving structure for bending stress of tooth roots of straight bevel gear |
-
2012
- 2012-08-29 CN CN 201220433454 patent/CN202756571U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806724A (en) * | 2015-03-30 | 2015-07-29 | 江苏太平洋齿轮传动有限公司 | Automobile differential mechanism |
| CN105114598A (en) * | 2015-09-25 | 2015-12-02 | 江苏太平洋齿轮传动有限公司 | Relieving structure for bending stress of tooth roots of straight bevel gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20210829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |