CN1337328A - timing gear of automobile engine - Google Patents
timing gear of automobile engine Download PDFInfo
- Publication number
- CN1337328A CN1337328A CN 00115939 CN00115939A CN1337328A CN 1337328 A CN1337328 A CN 1337328A CN 00115939 CN00115939 CN 00115939 CN 00115939 A CN00115939 A CN 00115939A CN 1337328 A CN1337328 A CN 1337328A
- Authority
- CN
- China
- Prior art keywords
- gear
- contact
- teeth
- timing gear
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims abstract description 9
- 210000000515 tooth Anatomy 0.000 claims description 20
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Gears, Cams (AREA)
Abstract
The invention belongs to the field of transportation, and particularly relates to an automobile engine timing gear, which has the technical scheme that a large timing gear on an inner camshaft of an automobile engine is processed into crowned teeth with a certain drum shape, a small timing gear on a crankshaft is processed into parallel teeth, and the large timing gear and the parallel teeth are in stable sliding contact in the actual meshing motion process, can be operated quickly and effectively, have good quality, high reliability and low noise, can fully achieve the purposes of shape modification and noise reduction, and can be widely assembled on various high-precision and low-noise automobile engines.
Description
This invention belongs to technical field of traffic transportation, particularly a kind of timing gear ofr automobile engine.
The time gear of automobile employing at present, because the load distribution in the real work, reasons such as installation error, ubiquity vibration and all bigger weakness of noise when engine operation.
The purpose of this invention provides a kind of time gear of automotive engine, helps reducing the vibration and the noise of automotive engine.
Its technical scheme: the profile of tooth of automobile time gear is carried out correction of the flank shape, sees that from the teeth directional direction big gear wheel gear teeth on the camshaft are crowned teeths, and the cydariform amount is between 3 to 8, and the miniature gears gear teeth on the bent axle are parallel teeth.
Two gear contact spots are distributed in the both sides of pitch circle on the active flank in motion process, account for 40%～50% of profile of tooth direction, miniature gears contact (area) pattern track center deflection tooth root 0.15mm～0.25mm on the bent axle, contact (area) pattern accounts for 72%～78% of facewidth direction.
Two gears do not contact in 1/10 the zone at facewidth two ends.
To liking helical spur gear, overlap ratio was greater than 3 o'clock for correction of the flank shape, and the flank of tooth of shave is concave not.
This beneficial effect of the invention shows this time gear, more corresponds to actual needs, and reliability is higher, the low noise gear of better quality.
Further describe this invention below in conjunction with embodiment.
In order to improve the transmission performance of time gear, effective way is under the condition of the certain precision that guarantees gear the wheel flank of tooth to be carried out correction of the flank shape, at first be with the round mill method hobboing cutter gear hobbing that has TIC coating, can guarantee working accuracy, primary product that rolling is come out again, be used on the Y4232 type gear tooth shaving machine and process, with involute gear shaver examination shaving wheel, decide gear grinding machines pattern correction of the flank shape length and corresponding concave amount according to the concave amount in the actual measurement of examination shaving axle, correction grinds the razor profile of tooth, adopt the feedback of the noise of contact (area) pattern and examination shaving wheel then, control the height in gear shaver correction of the flank shape district, the size of position and profiling quantity, and then the height in control time gear correction of the flank shape district, the size of position and profiling quantity is made low noise gear so that shave.
Do not pass through the involute time gear of correction of the flank shape, in order more to adapt under the mode of operation, actual conditions such as profile of tooth elastic deformation amount and actual installation error, must carry out the actv. correction of the flank shape to them, wheel is nibbled in intermeshing two timings after the correction of the flank shape, see that in the profile of tooth direction big gear wheel gear teeth on the camshaft are crowned teeths, the cydariform amount is between 3 to 8, more suitable about 4, the miniature gears gear teeth on the bent axle are parallel teeth, be that section on the profile of tooth direction is a parallelogram, two gear contact spots are distributed in the both sides of pitch circle on the active flank in the motion process, account for 45% of tooth depth direction, contact (area) pattern track center on the miniature gears, slightly be partial to tooth root 0.2mm, account for 75% of facewidth direction, substantially in central authorities, not contact in 1/10 the zone at facewidth two ends, engagement in the two gear actual motion processes meets low noise accuracy requirement, at 200mm place, distance engagement place, aim at ND type levels of precision meter that it is engaging-in or nibble outgoing direction and detect, noise figure≤the 79.5db of the main driving surface of big time gear on the camshaft, noise figure≤the 82.2db of the auxilliary driving surface of the time gear of camshaft, little time gear master driving surface noise figure≤81.2db on the bent axle, the auxilliary driving surface noise figure≤80.1db of little timing wheel gear on the bent axle.
To liking helical spur gear, overlap ratio is greater than 3 for correction of the flank shape, and the concave phenomenon does not appear in the shave process, thereby makes intermeshing two time gear on camshaft of car engine and the bent axle, and the noise precision reaches advanced international level in motion process.
Claims (4)
1, a kind of timing gear ofr automobile engine is characterized in that seeing that from the teeth directional direction big gear wheel gear teeth on the camshaft are crowned teeths that the cydariform amount is between 3 μ m to 8 μ m, and the miniature gears gear teeth on the bent axle are parallel teeth.
2, time gear according to claim 1, two gear contact spots are distributed in the both sides of pitch circle on their active flankes in motion process, account for 40%～50% of profile of tooth direction, tooth root 0.15mm slightly is partial to between the 0.25mm in contact (area) pattern track center on the miniature gears, tooth top slightly is partial at contact (area) pattern track center on the big gear wheel, and contact (area) pattern accounts for 72%～78% of facewidth direction.
3, time gear according to claim 1 is characterized in that they do not contact in 1/10 the zone at facewidth two ends.
4, time gear according to claim 1 is characterized in that time gear are helical spur gears, and overlap ratio was greater than 3 o'clock, and the flank of tooth of shave is concave not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001159399A CN1177994C (en) | 2000-08-05 | 2000-08-05 | Timing gear ofr automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001159399A CN1177994C (en) | 2000-08-05 | 2000-08-05 | Timing gear ofr automobile engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1337328A true CN1337328A (en) | 2002-02-27 |
| CN1177994C CN1177994C (en) | 2004-12-01 |
Family
ID=4585379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001159399A Expired - Fee Related CN1177994C (en) | 2000-08-05 | 2000-08-05 | Timing gear ofr automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177994C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909436A (en) * | 2012-07-17 | 2013-02-06 | 贵州群建精密机械有限公司 | Processing method for low noise gear with tooth number of less than 7 |
| CN106704543A (en) * | 2016-12-05 | 2017-05-24 | 贵州群建精密机械有限公司 | Method for reducing noise of engine by shaping timing gear of engine |
| CN113790254A (en) * | 2021-08-20 | 2021-12-14 | 浙江汇丰汽车零部件股份有限公司 | Plastic gear and mold opening method thereof |
-
2000
- 2000-08-05 CN CNB001159399A patent/CN1177994C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909436A (en) * | 2012-07-17 | 2013-02-06 | 贵州群建精密机械有限公司 | Processing method for low noise gear with tooth number of less than 7 |
| CN106704543A (en) * | 2016-12-05 | 2017-05-24 | 贵州群建精密机械有限公司 | Method for reducing noise of engine by shaping timing gear of engine |
| CN106704543B (en) * | 2016-12-05 | 2019-04-02 | 贵州群建精密机械有限公司 | A method of by reducing engine noise to engine timing gear correction of the flank shape |
| CN113790254A (en) * | 2021-08-20 | 2021-12-14 | 浙江汇丰汽车零部件股份有限公司 | Plastic gear and mold opening method thereof |
| CN113790254B (en) * | 2021-08-20 | 2022-06-21 | 浙江汇丰汽车零部件股份有限公司 | Plastic gear and mold opening method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177994C (en) | 2004-12-01 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |