CN201262215Y - Double-intermediate shaft automobile speed variator with major-minor case structure - Google Patents
Double-intermediate shaft automobile speed variator with major-minor case structure Download PDFInfo
- Publication number
- CN201262215Y CN201262215Y CNU2008200303409U CN200820030340U CN201262215Y CN 201262215 Y CN201262215 Y CN 201262215Y CN U2008200303409 U CNU2008200303409 U CN U2008200303409U CN 200820030340 U CN200820030340 U CN 200820030340U CN 201262215 Y CN201262215 Y CN 201262215Y
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- China
- Prior art keywords
- odd
- box
- gear
- major
- main tank
- 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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- General Details Of Gearings (AREA)
Abstract
The utility model relates to a double intermediate shaft automobile gear box with a structure of a main box and an auxiliary box, and aims to solve the problems of increase the strength of auxiliary box gears and preventing the premature failure of the gear box. The intermediate shaft automobile gear box with the main box and the auxiliary box provided by the utility model comprises the main box and the auxiliary box; both the main box and the auxiliary box adopt double intermediate shaft gears for transmission; and the center distance between the meshed auxiliary box gears is larger than the center distance between the meshed main box gears.
Description
Technical field
The utility model belongs to the automotive transmission field, particularly relates to a kind of two jack shaft automotive transmissions of major-minor box structure.
Background technique
At present domestic and international main automobile double countershaft transmission product all is to adopt the two jack shaft structures of major-minor case, and the gear engagement centre distance of its main tank and odd-side is identical.Major-minor case twin countershaft transmission in use, the odd-side strength of gear is much higher than the main tank strength of gear, particularly heavy truck is all the more so, though designing requirement has been satisfied in the strong method that adds by some routines, but because the heavy truck use condition of China is very complicated at present, low-grade use condition of speed changer and service condition are much more abominable than the design initial conditions, cause odd-side gear premature failure, and this has become one of major failure point of twin countershaft transmission.Along with the continuous increase of speed changer input torque, be necessary the intensity of odd-side gear is improved, but under the condition of present gearbox designs layout, only adopt the way of widening the odd-side gear to be difficult to effectively solve the problem of the odd-side strength of gear teeth.
Summary of the invention
Problem to be solved in the utility model is improved the odd-side gear transmission structure at the problem that prior art exists, and a kind of secondary box of gearbox strength of gear teeth that strengthens is provided, and improves two jack shaft automotive transmissions of the major-minor box structure of odd-side gear life.
The technological scheme that addresses the above problem is: two jack shaft automotive transmissions of the major-minor box structure that is provided comprise main tank and odd-side, main tank and odd-side all adopt two countershaft-gear transmissions, and improvements of the present utility model are the centre distance of the centre distance of said odd-side gear engagement greater than the main tank gear engagement.
The utility model can strengthen the centre distance of odd-side gear engagement on the basis of original design space, therefore do not change original other structure, and its cost does not almost increase.Test result shows, after the centre distance of odd-side gear engagement strengthened, not only the intensity of odd-side gear obtained bigger enhancing, and synchronizer also can correspondingly increase, and makes the gear shift operation more reliable and more stable.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing content of the present utility model is illustrated.
As shown in Figure 1: automotive transmission has main tank 1 and odd-side 2, is provided with main tank main shaft 11 and two main tank jack shafts 12 in the main tank 1, is provided with odd-side main shaft 21 and two odd-side jack shafts 22 in the odd-side 2.Actuation gear 31 on the input shaft 3 often meshes with first gear 13 on the main tank jack shaft 12, and each the gear driving gear 14 on the main tank jack shaft 12 and each shift gear 15 of main tank main shaft are meshed, and wherein one group of engaging gear has only drawn among the figure.Driving gear 16 on the main tank main shaft and odd-side countershaft drive gear 23 often mesh, and odd-side jack shaft 22 is provided with a tooth 24, and this tooth 24 and odd-side reduction gear 25 often mesh.The centre distance that odd-side jack shaft 22 and odd-side main shaft are 21 is greater than the centre distance of 11 on main tank jack shaft 12 and main tank main shaft, and promptly the centre distance of odd-side gear engagement is greater than the centre distance of main tank gear engagement.Generally speaking, the centre distance of odd-side gear engagement is advisable for big 5～10 millimeters than the centre distance of main tank gear engagement, and this moment, the intensity of odd-side gear can increase 1 times or more.All the other numberings among the figure: 4---main tank synchronizer, 26---the odd-side synchronizer.
The transmission process of this example is identical with existing major-minor case twin countershaft transmission.
Claims (2)
1, a kind of two jack shaft automotive transmissions of major-minor box structure comprise main tank and odd-side, and main tank and odd-side all adopt two countershaft-gear transmissions, it is characterized in that the centre distance of the centre distance of said odd-side gear engagement greater than the main tank gear engagement.
2, two jack shaft automotive transmissions of major-minor box structure according to claim 1 is characterized in that the centre distance of odd-side gear engagement is bigger 5～10 millimeters than the centre distance of main tank gear engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200303409U CN201262215Y (en) | 2008-09-19 | 2008-09-19 | Double-intermediate shaft automobile speed variator with major-minor case structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200303409U CN201262215Y (en) | 2008-09-19 | 2008-09-19 | Double-intermediate shaft automobile speed variator with major-minor case structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201262215Y true CN201262215Y (en) | 2009-06-24 |
Family
ID=40808688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200303409U Expired - Fee Related CN201262215Y (en) | 2008-09-19 | 2008-09-19 | Double-intermediate shaft automobile speed variator with major-minor case structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201262215Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591238A (en) * | 2013-11-05 | 2014-02-19 | 通海宏兴工贸有限公司 | Tractor gearbox with side transmission case |
-
2008
- 2008-09-19 CN CNU2008200303409U patent/CN201262215Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591238A (en) * | 2013-11-05 | 2014-02-19 | 通海宏兴工贸有限公司 | Tractor gearbox with side transmission case |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20170919 |