CN208221534U - A kind of antifriction sprocket wheel - Google Patents
A kind of antifriction sprocket wheel Download PDFInfo
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- CN208221534U CN208221534U CN201721558204.2U CN201721558204U CN208221534U CN 208221534 U CN208221534 U CN 208221534U CN 201721558204 U CN201721558204 U CN 201721558204U CN 208221534 U CN208221534 U CN 208221534U
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- groove
- sprocket wheel
- sprocket
- pit
- antifriction
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Abstract
The utility model relates to a kind of antifriction sprocket wheel, sprocket faces have Surface Texture, and Surface Texture is groove or pit or micro-nano groove, and groove is parallel to sprocket wheel axial direction；Pit is uniformly distributed in sprocket faces；Micro-nano groove shape and arrangement are irregular.The utility model can mitigate the mesh impact between sprocket wheel and roller, reduce the coefficient of friction of sprocket surface, improve chain drive system service life.
Description
Technical field
The utility model relates to mechanical transmission fields more particularly to a kind of sprocket wheels.
Background technique
Include drive sprocket and driven sprocket in chain drive system, be wound on sprocket wheel in polygon feature due to chain rather than
Circle, this allows for causing driven sprocket and speed chain non-constant when drive sprocket is rotated with constant speed, and is in one
Fixed mechanical periodicity.Namely constant revolving speed input, the revolving speed of output is variable.The speed at chain both ends will generate in this way
Cyclic swing, so that the chain movement speed with string feature generates fluctuation, this is polygon effect.This polygon effect
It can also be impacted before engagement from the different generations of chain link engagement spot speed because of chain link, especially in chain high-speed cruising, this punching
The influence hit is bigger.The amplitude of meshing impact can increase with the increase of chain tension and chain conveyer speed.Due to more
Mesh impact caused by the shape effect of side between chain part roller and sprocket wheel is the main reason for causing chain drive system to fail.
On the one hand, chain part roller is process using the processing method of cold-heading, is had on roller and is rushed bottom crackle, chain
Revolving speed height, the mesh impact between chain roller and sprocket wheel is more serious, or even will cause the fragmentation of roller.It improves and starts chain
System working life, the mesh impact mitigated between roller and sprocket wheel is effective ways.
On the other hand, the mesh impact between roller and sprocket wheel is the main reason for causing chain wear to extend.Chain
Abrasion is mainly the abrasion between chain part pin shaft and sleeve this friction pair.For engine chain, pin shaft and sleeve
Between abrasion based on adhesive wear and fatigue wear, and the mesh impact between roller and sprocket wheel is that pin shaft sleeve is caused to rub
The main reason for wiping secondary fatigue wear.The abrasion of roller and sprocket wheel will certainly aggravate the mesh impact of roller and sprocket wheel.Mitigate
Abrasion between sprocket wheel and roller mitigates the mesh impact between roller and sprocket wheel, can partially alleviate the fatigue wear of chain.
Utility model content
For the above technical problems, the purpose of the utility model is to provide a kind of antifriction sprocket wheel, mitigate sprocket wheel with
Mesh impact between roller improves chain drive system service life.
The technical solution of the utility model is as follows:
A kind of antifriction sprocket wheel, sprocket faces have a Surface Texture, and Surface Texture is groove or pit or irregular groove,
Groove is parallel to sprocket wheel axial direction, and groove is parallel to sprocket wheel axial direction；Groove is parallel to sprocket wheel axial direction, recess width 0.05mm-
0.2mm, depth 0.02mm-0.05mm, away from for 0.1mm-0.3mm, groove length is less than sprocket at center between adjacent two groove
Face width.Pit is uniformly distributed in sprocket faces, pit diameter 0.1mm-0.4mm, depth 0.05mm-0.2mm, adjacent two pit
Between center away from for 1mm-5mm.Groove dimensions are in the micron-scale or nanoscale.
The Surface Texture is obtained by machining or chemical etching.
The Surface Texture is uniformly distributed in sprocket wheel tooth surface.
Studies have shown that surface of friction pair is not more smooth more wear-resisting；It processes in surface of friction pair with certain pattern
Texture can play capture wear particle, form micro- oil storage tank to store lubricant medium and generate hydrodynamic lubrication effect and then mention
High bearing capacity, the effect for reducing surface abrasion.
Result of study proves: the unevenness array of component of machine rule of surface arrangement is improving bearing capacity, antifriction
Wear-resistant, extension machine service life etc. has the effect of highly significant.He thinks: small recessed under the conditions of sufficient lubrication
The main function of hole or groove is to generate hydrodynamic carrying oil film to separate two surface of friction pair；And in Starved Lubrication condition
Under, unevenness or groove are then used as oil-bearing structure, provide lubricating oil for surface of friction pair when rubbing secondary relative motion to change
Kind lubrication state, these all can undoubtedly drop the coefficient of friction of low friction pair, improve the wearability of product.
Friction pair under high speed light loading service condition, generating additive fluid dynamic pressure is considered as that Surface Texture is most heavy
The effect wanted.Classical lubrication theory thinks that Newtonian fluid cannot generate hydrldynamic pressure lubrication film between relatively parallel surface
And make the separation of two surfaces to reduce friction, so that it is believed that the more smooth surface of friction pair the better.In fact, due to being subject to processing
The influence of precision the surface roughness obtained after surface finish work such as is polished to surface, is ground and being restricted always.And
Early stage finds that the surface roughness in parallel surfaces has very the greasy property of thrust bearing to the experimental study of thrust bearing
Big positive influences.Due to the presence of surface roughness, lubricating film can be made to be formed between the parallel bearing surface of opposite sliding
It is enough to support the hydrodynamic pressure of its external load, is pointed out on the basis of test and the calculated results, it is this thick by surface
Rugosity and the lubricating action that generates cannot be explained with classical lubrication theory, the lubricating film between opposed parallel surfaces why can
Enough effects for generating carrying external load are because there are hydrodynamic pressure distributions at each small pattern, in parallel by two
Topical oil film separates, to generate lubricant effect.The scholar of early stage, which proposes, generates additive fluid using surface minute protrusions
The idea of dynamic pressure.They think to form convergence wedge between one side of protrusion and the another side of friction pair and generate hydrodynamic
Power, and raised another side forms diverging wedge and the negative pressure that generates is since cavitation is limited, to be produced to friction surface
Additional bearing capacity is given birth to.
Detailed description of the invention
Fig. 1 is antifriction sprocket wheel schematic diagram.
Fig. 2 is 1 structural schematic diagram of embodiment.
Fig. 3 is 2 structural schematic diagram of embodiment.
Specific embodiment:
Embodiment 1
Finished product sprocket wheel is taken, after removing surface and oil contaminant corrosion, is processed using laser micromachining process in sprocket wheel tooth surface a plurality of
Groove, groove are parallel to sprocket wheel axial direction, recess width 0.1mm, depth 0.02mm, spacing 0.2mm between groove, as shown in Figure 2.It is recessed
After slot processing, sprocket wheel is integrally polished, removes machined burrs and foul.
Embodiment 2
Sprocket wheel blank is taken, after removing surface and oil contaminant, pit is extruded in sprocket wheel tooth surface using pressure carving method.Pit diameter
0.3mm, depth 0.05mm, center is away from for 1-5mm between adjacent two pit, as shown in Figure 3.After pressing engraved pit, sprocket wheel is cleaned, and is done
Heat treatment.
Embodiment 3
Finished product sprocket wheel, deoils and derusts, and etches the other ditch of micro- (receiving) meter level in sprocket faces using the method for chemical etching
Slot.Etching liquid is NaOH solution (concentration 50%).After etching, sprocket wheel is cleaned, and does antirust treatment.
Claims (4)
1. a kind of antifriction sprocket wheel, it is characterised in that: sprocket faces have Surface Texture, and Surface Texture is groove or pit or does not advise
Groove then；The groove or pit class Surface Texture are uniformly distributed in sprocket wheel tooth surface；Groove is parallel to sprocket wheel axial direction, groove
Width 0.05mm-0.2mm, depth 0.02mm-0.05mm, center is away from for 0.1mm-0.3mm, groove length between adjacent two groove
Less than sprocket faces width；Pit is uniformly distributed in sprocket faces, pit diameter 0.1mm-0.4mm, depth 0.05mm-0.2mm,
Center is away from for 1mm-5mm between adjacent two pit.
2. a kind of antifriction sprocket wheel as described in claim 1, it is characterised in that: the groove or pit class Surface Texture pass through machine
Tool processing obtains.
3. a kind of antifriction sprocket wheel as described in claim 1, it is characterised in that: the groove is obtained by chemical etching.
4. a kind of antifriction sprocket wheel as claimed in claim 3, it is characterised in that: the irregular groove dimensions in the micron-scale or are received
Meter level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558204.2U CN208221534U (en) | 2017-11-21 | 2017-11-21 | A kind of antifriction sprocket wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558204.2U CN208221534U (en) | 2017-11-21 | 2017-11-21 | A kind of antifriction sprocket wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208221534U true CN208221534U (en) | 2018-12-11 |
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ID=64532375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721558204.2U Active CN208221534U (en) | 2017-11-21 | 2017-11-21 | A kind of antifriction sprocket wheel |
Country Status (1)
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| CN (1) | CN208221534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021165679A1 (en) * | 2020-02-18 | 2021-08-26 | Alex Trimnell | Drivetrain components with surface texture |
-
2017
- 2017-11-21 CN CN201721558204.2U patent/CN208221534U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021165679A1 (en) * | 2020-02-18 | 2021-08-26 | Alex Trimnell | Drivetrain components with surface texture |
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