CN203823005U - Structural development for backward gear of roller tractor gearbox - Google Patents
Structural development for backward gear of roller tractor gearbox Download PDFInfo
- Publication number
- CN203823005U CN203823005U CN201420132398.XU CN201420132398U CN203823005U CN 203823005 U CN203823005 U CN 203823005U CN 201420132398 U CN201420132398 U CN 201420132398U CN 203823005 U CN203823005 U CN 203823005U
- Authority
- CN
- China
- Prior art keywords
- gear
- gearwheel
- seat
- reverse gear
- backward
- 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 - Lifetime
Links
- 238000003754 machining Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Gears, Cams (AREA)
Abstract
The utility model belongs to the technical field of roller tractor gearboxes, and relates to the structural development for a backward gear of a roller tractor gearbox. The backward gear comprises a big gear and a small gear which are arranged on a backward gear seat in parallel, wherein the big gear and the backward gear seat form a split structure. The structural development has the advantages that as the big and small gears are arranged on the backward gear seat in a split way, outer teeth of the big gear and outer teeth of the small gear can be machined by a grinding machine, and the machining accuracy of each gear is improved to Level 6 from the original Level 8; as the machining accuracy is improved, when operating at a high gear, a driving gear with the Level 6 accuracy drives the small gear, with the Level 6 accuracy, of the backward gear to idle; though the meshing linear velocity reaches 20m/s, the generated noise is less than or equal to 82db, and the product production standards are met; the structural development is suitable for backward gears of roller tractor gearboxes with the same type.
Description
Technical field
The utility model belongs to wheeled tractor gearbox technical field, refers in particular to a kind of reverse gear architecture advances of wheeled tractor gearbox.
Background technique
Referring to Fig. 3: at present, the reverse gear 40 of wheeled tractor gearbox is all one-body moldedly on reverse gear seat 43 to have the gearwheel 41 and the small gear 44 that are set up in parallel, due to gearwheel 41 and small gear 44 one-body molded on reverse gear seat 43, and the external diameter of the external tooth 42 of gearwheel 41 is greater than the external diameter of the external tooth 45 of small gear 44, therefore, only have the external tooth 41 of gearwheel 41 to be convenient to process with grinding machine, its precision can reach 6 grades, and the external tooth 45 of small gear 44 only can use slotting machine processing, its precision only can reach 8 grades, when in the time that top gear turns round, driving gear 30 drives the small gear 41 of reverse gear 40 to dally, line of contact speed reaches 20m/s, because the machining accuracy of the external tooth 45 of small gear 44 is low, more than the noise of its generation reaches 92db, do not meet the production standard of product noise≤87db.
Summary of the invention
The purpose of this utility model is to provide the reverse gear architecture advances of the wheeled tractor gearbox that a kind of operating noise is little.
The purpose of this utility model is achieved in that
A kind of reverse gear architecture advances of wheeled tractor gearbox, comprises the gearwheel and the small gear that are set up in parallel on reverse gear seat, and described gearwheel and reverse gear seat are split-type structural.
The concrete structure that above-mentioned gearwheel and reverse gear seat are split-type structural is: on reverse gear seat, be provided with the gearwheel fitting seat of external key tooth and be arranged on the annular slot in gearwheel fitting seat outside, the internal key tooth arranging on gearwheel engages clamping with the external key tooth on gearwheel fitting seat, is connected with elastic spacing collar on described annular slot.
On above-mentioned gearwheel fitting seat, the external diameter of external key tooth is less than the external diameter at reverse gear seat middle part, and the external diameter at reverse gear seat middle part is less than the tooth root diameter of a circle of small gear.
The external tooth of the external tooth of the arranged outside of above-mentioned gearwheel and the arranged outside of small gear is 6 class precisions.
The utility model compared to existing technology outstanding and useful technique effect is:
Because gearwheel and small gear partial installation are on reverse gear seat, the external tooth of gearwheel and the external tooth of small gear all can utilize grinding machine processing, its machining accuracy is brought up to 6 grades by original 8 grades, due to the raising of machining accuracy, when in the time that top gear turns round, the driving gear of 6 class precisions drives the small gear idle running of 6 class precisions of reverse gear, although line of contact speed reaches 20m/s, but the noise≤82db of its generation, meet the production standard of product, the utility model is applicable to the reverse gear of gearbox of the same type.
Brief description of the drawings
Fig. 1 is structure sectional view of the present utility model.
Fig. 2 is the sectional view after the utility model engages with driving gear.
Fig. 3 is the sectional view after prior art engages with driving gear.
Embodiment
The utility model is further described with specific embodiment below in conjunction with accompanying drawing, referring to Fig. 1-Fig. 2:
A kind of reverse gear architecture advances of wheeled tractor gearbox, comprises the gearwheel 13 and the small gear 12 that are set up in parallel on reverse gear seat 11, and described gearwheel 13 is split-type structural with reverse gear seat 11.
Above-mentioned gearwheel 13 with the concrete structure that reverse gear seat 11 is split-type structural is: on reverse gear seat 11, be provided with the gearwheel fitting seat of external key tooth 111 and be arranged on the annular slot in gearwheel fitting seat outside, the internal key tooth 132 arranging on gearwheel 13 engages clamping with the external key tooth 111 on gearwheel fitting seat, on described annular slot, be connected with elastic spacing collar 20, carry out spacing and fixing to gearwheel 13.
Above-mentioned gearwheel 13 also can be taked following structure with reverse gear seat 11 for split-type structural: on reverse gear seat, be provided with gearwheel fitting seat, described gearwheel 13 is screwed onto on reverse gear seat by bolt.
On above-mentioned gearwheel fitting seat, the outer diameter D 1 of external key tooth 111 is less than the outer diameter D 2 at reverse gear seat middle part 14, and the outer diameter D 2 at reverse gear seat middle part 14 is less than the tooth root diameter of a circle D3 of small gear 12.
The external tooth 121 of the external tooth 131 of the arranged outside of above-mentioned gearwheel 13 and the arranged outside of small gear 12 is 6 class precisions.
Above-described embodiment is only preferred embodiment of the present utility model, not limits according to this protection domain of the present utility model, therefore: all equivalences of doing according to structure of the present utility model, shape, principle change, within all should being covered by protection domain of the present utility model.
Claims (3)
1. the reverse gear architecture advances of a wheeled tractor gearbox, comprise the gearwheel and the small gear that are set up in parallel on reverse gear seat, it is characterized in that: described gearwheel and reverse gear seat are split-type structural, the concrete structure of split-type structural is: on reverse gear seat, be provided with the gearwheel fitting seat of external key tooth and be arranged on the annular slot in gearwheel fitting seat outside, the internal key tooth arranging on gearwheel engages clamping with the external key tooth on gearwheel fitting seat, is connected with elastic spacing collar on described annular slot.
2. the reverse gear architecture advances of a kind of wheeled tractor gearbox according to claim 1, it is characterized in that: on described gearwheel fitting seat, the external diameter of external key tooth is less than the external diameter at reverse gear seat middle part, the external diameter at reverse gear seat middle part is less than the tooth root diameter of a circle of small gear.
3. according to the reverse gear architecture advances of a kind of wheeled tractor gearbox described in claim 1-2 any one, it is characterized in that: the external tooth of the external tooth of the arranged outside of described gearwheel and the arranged outside of small gear is 6 class precisions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132398.XU CN203823005U (en) | 2014-03-22 | 2014-03-22 | Structural development for backward gear of roller tractor gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132398.XU CN203823005U (en) | 2014-03-22 | 2014-03-22 | Structural development for backward gear of roller tractor gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203823005U true CN203823005U (en) | 2014-09-10 |
Family
ID=51478512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420132398.XU Expired - Lifetime CN203823005U (en) | 2014-03-22 | 2014-03-22 | Structural development for backward gear of roller tractor gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203823005U (en) |
-
2014
- 2014-03-22 CN CN201420132398.XU patent/CN203823005U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Zhenghua Inventor before: Chen Zhengwen |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: CHEN ZHENGWEN TO: CHEN ZHENGHUA |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
|
| CX01 | Expiry of patent term |