CN206352646U - Variable tooth thickness gear - Google Patents
Variable tooth thickness gear Download PDFInfo
- Publication number
- CN206352646U CN206352646U CN201621399182.5U CN201621399182U CN206352646U CN 206352646 U CN206352646 U CN 206352646U CN 201621399182 U CN201621399182 U CN 201621399182U CN 206352646 U CN206352646 U CN 206352646U
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- gear
- working
- tooth thickness
- coupling
- flank
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- 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.)
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Abstract
The utility model provides a kind of variable tooth thickness gear, including first gear and second gear, wavy spring is provided between first gear and second gear, second gear is fixedly installed in first gear by straight pin, the end face of second gear installs circlip for shaft.Variable tooth thickness gear of the present utility model, when first gear is contacted with the working face of coupling gear, the non-working flank of second gear is also also contacted with the non-working flank of coupling gear, the non-working flank distance of a pair of coupling gears is effectively decreased to 0, and can change with Parameters variations such as the tooth pitch of coupling gear, circular runout, transverse tooth thickness, when it also avoid that distance is less than 0 between non-working flank simultaneously, increase gear teeth face compression and radially of the axis of rotation pressure so that the problem of reducing gear, the life-span of rotary shaft.Gear has been effectively eliminated because the distance of reserved 0.1mm 0.3mm when being designed between non-working surface makes the abnormal sound produced in engine working process.
Description
Technical field
The utility model is related to gear technique field, more particularly to timing gear for diesel engine.
Background technology
Existing timing gear for diesel engine is as shown in figure 1, outside circle transverse tooth thickness d is 3mm（It is immutable）, now work tooth
When face is contacted with coupling gear working flank, non-working flank is not contacted, i.e., spacing is 0.1-0.3mm.Engine gear is engaged
During also change therewith with the change of operation conditions, the rotating speed and stress of gear, therefore, cause gear non-working surface it
Between contact so that produce abnormal sound during gear engagement, and the distance between a pair of gear non-working surfaces are bigger, when it is contacted
Impact is bigger, therefore, and the abnormal sound of gear is bigger.Due to equipment, manufacturing process and installation influence, and temperature during gear operation
Rise transverse tooth thickness and become big, distance is too small between causing non-working surface, when referring mainly to distance between non-working surface and being less than 0, can now increase
The compression of the gear wheel flank of tooth and radially of the axis of rotation pressure, so as to reduce gear, the life-span of rotary shaft.Therefore, a pair of gears
The distance between non-working surface is designed between 0.1mm-0.3mm, and is continually changing as gear parameter tolerance etc. changes,
It is inevitable to produce abnormal sound under current design point, in Meshing Process of Spur Gear.
Utility model content
The problem of in order to solve to produce abnormal sound in existing timing gear for diesel engine engagement process, the utility model is provided
A kind of variable tooth thickness gear.
The technical scheme that the utility model is used to achieve the above object is：Variable tooth thickness gear, including first gear 1
With second gear 2, wavy spring 3 is provided between first gear 1 and second gear 2, second gear 2 is fixed by straight pin 5 pacifies
Loaded in first gear 1.
The end face of the second gear 2 installs circlip for shaft 4.
The straight pin 5 coordinates with the gap of second gear 2 to be installed, and straight pin 5 is interference fitted with first gear 1 and installed.
Variable tooth thickness gear of the present utility model, when first gear is contacted with the working face of coupling gear, second gear
Non-working flank is also also contacted with the non-working flank of coupling gear, effectively by the non-working flank distance of a pair of coupling gears
It is decreased to 0, and can changes with Parameters variations such as the tooth pitch of coupling gear, circular runout, transverse tooth thickness, while it also avoid non-
When distance is less than 0 between working flank, the compression of increase gear teeth face and radially of the axis of rotation pressure are so as to reduce gear, rotation
The problem of life-span of rotating shaft.Gear has been effectively eliminated because the distance of reserved 0.1mm-0.3mm when being designed between non-working surface makes
The abnormal sound produced in engine working process.
Brief description of the drawings
Fig. 1 is existing timing gear for diesel engine structure chart.
Fig. 2 is the variable transverse tooth thickness gear structure figure of the utility model.
In figure：1st, first gear, 2, second gear, 3, wavy spring, 4, circlip for shaft, 5, straight pin, 6, work
The flank of tooth, 7, non-working flank.
Embodiment
Gear structure of the present utility model is as shown in Fig. 2 one group of gear in the helical gear of a pair of cooperations is by two parameters
The same but the different first gear 1 of structure and second gear 2 are constituted, and a waveform is placed between first gear 1 and second gear 2
Spring 3, can compress within the specific limits, place a circlip for shaft 4 in the end face of second gear 2, second gear 2 is consolidated
It is scheduled in first gear 1, while limiting position relationship of two gears in circumferencial direction by two straight pins 5.
Effective outside circle transverse tooth thickness k of first gear 1 and second gear 2 is changed into 3.5mm, the working flank of first gear 1 with
When coupling gear is engaged, the working flank 6 of second gear 2 is not involved in the inoperative tooth of engagement, non-working flank and coupling gear
Face is contacted.Install after gear, wavy spring 3 is compressed, second gear 2 is along circlip for shaft 4 in axial direction to first gear 1
It is mobile, until the non-working flank of first gear 1 and second gear 2 is changed to apart from 0.5mm（Non-working flank under former design point
Do not contact）When spacing is 0.1-0.3mm, i.e., the non-working flank of second gear 2 is contacted with the non-working flank of coupling gear,
In running, if because the reasons such as manufacture, installation, temperature rise and abrasion cause the actual range of non-working flank to change from small to big
When, due to wavy spring 3 be in change from confined state to free state so that the non-working flank of second gear 2 with
The non-working flank of coupling gear is in contact condition all the time, reaches the effect for eliminating abnormal sound；And actual range from large to small when
Wavy spring 3 can still diminish because of recompression.Above-mentioned numerical value is distance explanation, can be according to the reality of engine during actual design
State is adjusted.
Claims (3)
1. variable tooth thickness gear, it is characterised in that：Including first gear（1）And second gear（2）, first gear（1）With second
Gear（2）Between be provided with wavy spring（3）, second gear（2）Pass through straight pin（5）It is fixedly installed in first gear（1）On.
2. variable tooth thickness gear according to claim 1, it is characterised in that：The second gear（2）End face installation axle
Use circlip（4）.
3. variable tooth thickness gear according to claim 1, it is characterised in that：The straight pin（5）With second gear（2）Between
Gap, which coordinates, to be installed, straight pin（5）With first gear（1）Interference fit is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621399182.5U CN206352646U (en) | 2016-12-20 | 2016-12-20 | Variable tooth thickness gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621399182.5U CN206352646U (en) | 2016-12-20 | 2016-12-20 | Variable tooth thickness gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206352646U true CN206352646U (en) | 2017-07-25 |
Family
ID=59346602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621399182.5U Active CN206352646U (en) | 2016-12-20 | 2016-12-20 | Variable tooth thickness gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206352646U (en) |
-
2016
- 2016-12-20 CN CN201621399182.5U patent/CN206352646U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |