CN104675955B - Combined variable tooth thickness gear - Google Patents
Combined variable tooth thickness gear Download PDFInfo
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- CN104675955B CN104675955B CN201510068215.1A CN201510068215A CN104675955B CN 104675955 B CN104675955 B CN 104675955B CN 201510068215 A CN201510068215 A CN 201510068215A CN 104675955 B CN104675955 B CN 104675955B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/12—Toothed members; Worms with body or rim assembled out of detachable parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/14—Construction providing resilience or vibration-damping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
- F16H2055/176—Ring gears with inner teeth
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Retarders (AREA)
Abstract
The invention discloses a combined variable tooth thickness gear. The gear is sequentially constructed by a plurality of annular gear pieces with the same number of teeth and variable-thickness tooth shapes; the gear teeth of each gear piece are arranged in the inner circumference of the annular gear piece; each gear piece comprises outer gear pieces and inner gear pieces positioned between the two outer gear pieces; a vibration and noise reduction sheet is connected between every two externally-adjacent gear pieces in a glued manner; a plurality of mounting holes used for fixing the gear piece are formed in the circular ring of each gear piece; the tip diameter and the root diameter of each gear piece are equal; the tooth thickness of each gear piece gradually increases or decreases along the same axial direction of the gear; the inner and outer gear pieces and the vibration reduction pieces construct a complete variable tooth thickness tangential-deflection inner gear structure. The combined variable tooth thickness gear constructs the variable tooth thickness gear by combining the gear pieces, so that the gear machining usability is good, the glued vibration and noise reduction pieces are arranged among the gear pieces, the meshing vibration is restrained at the root, the transmission noise is reduced, and the service life of a gear pair is prolonged.
Description
Technical field
The present invention relates to gear transmission technology field, more particularly to a kind of combined variable tooth thickness gear, this gear has
Complete change transverse tooth thickness tangent modification inner gear structure.
Background technology
Gear-box, as the important drive disk assembly of modern automobile industry, is main vibration source and the noise in car running process
One of source, its service behaviour has important impact to car load.Automobile vendor also pay much attention to reduce gear-box vibration and
Noise, and using it as new car bright spot.Gear engagement produces vibration, is delivered on gear housing by axle and bearing block, leads
Cause casing vibration, radiated noise simultaneously.The vibration of gear engagement interface is the decisive excitation of construct noise, how to suppress to engage
The vibration producing, reduces noise from root, has important engineering application value.
Variable tooth thickness gear, its modification coefficient changes in the axial direction according to certain rules, and profile of tooth is formed necessarily in axis direction
Taper.Just meshing backlass can be adjusted by adjusting its axial displacement, reach tune gap or the gap purpose that disappears, realize precision drive, because
This has broad application prospects in the transmission such as precision machinery people and elaborate servo.But this Gear Processing is relatively difficult, and
The lathe by the design of its forming principle is not available, and production cost is very high, therefore solves under existing level of processing at home
Its processing problems, significant for the application promoting this kind of gear.On the other hand, the variable tooth thickness gear of prior art is equal
Using overall structure, the vibration noise being produced by gear engagement is larger, solves the noise problem of variable tooth thickness gear, for promoting this
The application planting gear is also significant.
Content of the invention
The purpose of the present invention is for solving the variable tooth thickness gear processing difficulties of prior art and the change transverse tooth thickness tooth of prior art
The big problem of wheel gearing noise provides combined variable tooth thickness gear a kind of easy to process and that meshing noise is low.
The present invention is to solve above-mentioned technical problem employed technical scheme comprise that, a kind of combined variable tooth thickness gear, described tooth
If wheel is had the identical number of teeth and has the annular gear piece sequential combination of thickening profile of tooth and constitute by dry tablet, the gear teeth of gear piece are arranged on
On the inner periphery of annular gear piece, described gear piece includes the outer gear piece located at gear axial direction two ends and is located between two outer gear pieces
Some inner blades, the thickness of outer gear piece is more than the thickness of inner blade, and all glueing joint between adjacent gear piece has vibration and noise reducing piece, tooth
The annulus of piece is provided with some fixing holes for fixing gear piece, and the tip diameter of described gear piece and root diameter are homogeneous
Deng, described gear piece transverse tooth thickness along gear same axial increasing or decreasing, inside and outside gear piece and vibration and noise reducing piece constitute one complete
Change transverse tooth thickness tangent modification inner gear structure.If the change transverse tooth thickness tangent modification gear of the present invention is had the circle of thickening profile of tooth by dry tablet
Annular gear piece combination is constituted, and gear piece includes outer gear piece and inner blade, and wherein in the both ends of the surface of gear axial direction, respectively one piece of setting is outer
Gear piece, arranges some inner blades between outer gear piece, glued joint vibration and noise reducing piece, the basic knot of vibration and noise reducing piece between adjacent gear piece
Structure is adapted with gear piece, and inside and outside gear piece and vibration and noise reducing piece are by fixing in the screw of fixing in the hole or rivet joint, thus structure
Become a complete change transverse tooth thickness tangent modification internal gear.Constituted using gear piece combination bonding mode and become transverse tooth thickness tangent modification internal tooth
Wheel, because single gear piece thickness is less, therefore easily reaches processing request, Gearmaking Technology is good, applies simple technique
Hardened gear face and the processing of high-precision variable tooth thickness gear just can be completed, solve the asking of variable tooth thickness gear processing difficulties of prior art
Topic, can improve bearing capacity and the running precision of actuating device.Here thickening profile of tooth refers to its tooth of the gear teeth on gear piece
Thickness is incrementally increased towards another side by the one of gear piece in the axial direction of gear.In addition, all glueing joint between the adjacent gear piece of the present invention
There is vibration and noise reducing piece, vibration and noise reducing piece has high damping characteristic, is gluedd joint between gear piece, can effectively suppress gear to engage
The vibration causing, reduces the mesh vibration of gear from root, reduces rotational noise, thus reducing noise.The therefore present invention
Structure can solve the problems, such as that the variable tooth thickness gear gearing noise of prior art is big, the use of gear pair can also be extended simultaneously
In the life-span, it is particularly well-suited to high-precision actuating device.In addition, the present invention passes through the dual fastening that splicing and screw or rivet are fixed
Mode is it can be ensured that the bulk strength of gear.
Preferably, the gear teeth of described gear are straight-tooth or helical teeth, the modification coefficient of described gear is in axially line along gear
Property change.
Preferably, the thickness of all inner blades is equal, the thickness of all vibration and noise reducing pieces is equal and its thickness is internal tooth
The 15% to 30% of piece thickness, the thickness of outer gear piece is equal and its thickness is 3 to 5 times of inner blade thickness.For identical material
Vibration and noise reducing piece, using the effect of vibration and noise reduction that can improve of larger thickness, but can affect the bulk strength of gear；And vibration damping fall
Make an uproar piece thickness too small, then effect of vibration and noise reduction is poor, generally select vibration and noise reducing piece thickness be inner blade thickness 15% to
30% is proper, this numerical value can also according to different operating mode gears be actually needed and unlike material vibration and noise reducing piece noise reduction
Characteristic considers selection.The outer gear piece of the present invention, in addition to the function of undertaking gear, also undertakes compression inner blade and vibration and noise reducing
The function of piece, the thickness of therefore outer gear piece is generally bigger than the thickness of inner blade, so it may also be ensured that the edge strength of gear,
Avoid positioned at outermost gear piece cracking or crimp.
The gear piece of the present invention and vibration and noise reducing piece can also adopt following several further improved structure forms:
1st, the thickness of all inner blades is equal, and the thickness positioned at the vibration and noise reducing piece of the larger inner blade side of transverse tooth thickness is more than
Positioned at the thickness of the vibration and noise reducing piece of transverse tooth thickness less inner blade side, the thickness of vibration and noise reducing piece becomes along gear is axially linear
Change, the minimum thickness of vibration and noise reducing piece is the 15% to 20% of inner blade thickness, the maximum gauge of vibration and noise reducing piece is that inner blade is thick
The 25% to 30% of degree, the thickness of outer gear piece is equal and its thickness is 3 to 5 times of inner blade thickness.In the technical program, gear
In each inner blade thickness all equal, the thickness of vibration and noise reducing piece is different, near the vibration damping of the larger inner blade side of transverse tooth thickness
The thickness of noise reduction piece is larger, less near the thickness of the vibration and noise reducing piece of transverse tooth thickness less inner blade side, and vibration and noise reducing piece
Thickness change along gear is axially linear.It is relatively large, same that this allows for transverse tooth thickness its overall dimensions of larger inner blade
Under the thickness of sample, its resonant frequency is relatively low, and the larger vibration and noise reducing piece of thickness has for the relatively low vibration of frequency and preferably declines
Subtract ability, so can on the premise of not increasing vibration and noise reducing piece integral thickness broadening gear vibration suppression frequency band, reduce
The rotational noise of gear, thus reduce noise.
2nd, the thickness of the less inner blade of transverse tooth thickness is more than the thickness of the larger inner blade of transverse tooth thickness, the thickness of maximum gauge inner blade
Degree is 1.5 to 2 times of the thickness of minimum thickness inner blade, and the thickness of inner blade changes along gear is axially linear, all vibration dampings
The thickness of noise reduction piece is equal and its thickness is the 10% to 20% of maximum inner blade thickness, and the thickness of outer gear piece is equal and its thickness is
2 to 3 times of the thickness of maximum inner blade.In the technical program, in gear, the thickness of each vibration and noise reducing piece is all equal, and interior
The thickness of gear piece is different, and the thickness of the less inner blade of transverse tooth thickness is larger, and the thickness of the larger inner blade of transverse tooth thickness is less, and this is to consider
Relatively small to transverse tooth thickness its overall dimensions of less inner blade, under same thickness, its resonant frequency is higher, suitably increases thick
Degree can make its resonant frequency decline, it is to avoid the noise band of gear is wide, facilitates views with the vibration damping fall of single damping characteristic
Piece of making an uproar eliminates the rotational noise of gear, thus reducing noise.
3rd, the thickness of the less inner blade of transverse tooth thickness is more than the thickness of the larger inner blade of transverse tooth thickness, the thickness of maximum gauge inner blade
Degree is 1.5 to 2 times of the thickness of minimum thickness inner blade, and the thickness of inner blade changes along gear is axially linear；Positioned at transverse tooth thickness
The thickness of the vibration and noise reducing piece of larger inner blade side is more than the vibration and noise reducing piece positioned at transverse tooth thickness less inner blade side
Thickness, the thickness of maximum gauge vibration and noise reducing piece is 1.5 to 2 times of the thickness of minimum thickness vibration and noise reducing piece, vibration and noise reducing piece
Thickness change along gear is axially linear, the maximum gauge of vibration and noise reducing piece is the 15% to 30% of maximum inner blade thickness, outward
The thickness of gear piece is equal and its thickness is 2 to 3 times of thickness of maximum inner blade.It is aforementioned 1,2 two kind of side in the technical program
The integration scenario of case, its operation principle is basically identical, and structure is relative complex, but has more preferable effect of vibration and noise reduction.
Preferably, inner blade includes the internal tooth chip architecture of two kinds of different hardness, it is hard for the inner blade of two kinds of different hardness
The difference of angle value is the 10% to 15% of high rigidity inner blade hardness number, and the inner blade of two kinds of different hardness is alternately arranged, described internal tooth
The total quantity of piece is odd number, and its hardness of the inner blade adjacent with outer gear piece is higher than the inner blade being adjacent, and described outer gear piece is adopted
Use composite damping steel plate structure.Be conducive to the dispersion of the noise frequency point of inner blade using the inner blade of two kinds of different hardness, from
And reducing the noise peak of same frequency point, it is to avoid noise frequency concentrates on a frequency, advantageously reduces gear noise
Maximum.The difference of hardness number here is the 10% to 15% of high rigidity inner blade hardness number, is the inner blade hardness with high rigidity
On the basis of value, the hardness number of the inner blade of soft is hard with respect to the inner blade of high rigidity with the difference of high rigidity inner blade hardness number
The percentage ratio of angle value, for example, when the inner blade hardness number of high rigidity is hrc50, then the hardness of the inner blade of soft
It is worth for hrc42.5- hrc45；The inner blade of two kinds of different hardness can be the different material of two kinds of hardness or same
Plant material and two kinds of different hardness are obtained by different heat treatment modes；And outer gear piece also may be used using composite damping steel plate structure
With the propagation of effective suppression vibration, thus reducing noise.
Preferably, every vibration and noise reducing piece is made up of single damping material, gear is provided with two kinds by different damping characteristic
The vibration and noise reducing piece that constitutes of damping material, the fissipation factor peak value of two kinds of vibration and noise reducing pieces corresponds to two kinds of frequencies, two kinds of vibration dampings
Noise reduction piece is alternately arranged between the gear piece of gear.For the above-mentioned gear adopting two kinds of different hardness inner blades, this skill
The structure of art scheme can be adapted to it, to suppress to make an uproar accordingly using two kinds of vibration and noise reducing pieces with corresponding damping characteristic
Sound, can reach good noise reduction.
Vibration and noise reducing piece can also adopt structures below form:
1st, every vibration and noise reducing piece is made up of single damping material, and gear is provided with the two or more resistances by different damping characteristic
The vibration and noise reducing piece that damping material is constituted, the corresponding different frequency of fissipation factor peak value of every kind of vibration and noise reducing piece, different damping is special
Property vibration and noise reducing piece between the gear piece of gear alternate cycles arrangement.The technical program is for three kinds and more than three kinds but total
Number is three kinds less than the vibration and noise reducing piece situation of gear piece gap number, such as vibration and noise reducing piece, but the gear piece gap number of gear is six
Individual, now three kinds of vibration and noise reducing pieces adopt the arrangement mode of 1+2+3+1+2+3 in the axial direction of gear, this vibration and noise reducing piece
The plan of establishment is mainly used in broadening vibration and noise reducing piece frequency suppression scope, can pass in the larger gear of some frequency noise scopes
Use in dynamic system.
2nd, every vibration and noise reducing piece is made up of single damping material, and on gear, the vibration and noise reducing piece of diverse location is hindered by difference
The damping material of damping characteristics is constituted, the corresponding different frequency of fissipation factor peak value of every vibration and noise reducing piece, different damping characteristic
Vibration and noise reducing piece in the axial direction of gear the frequency size as corresponding to fissipation factor peak value be arranged in order, less with transverse tooth thickness
Its frequency corresponding to fissipation factor peak value of the vibration and noise reducing piece that outer gear piece is close to is close to higher than the outer gear piece larger with transverse tooth thickness
Its frequency corresponding to fissipation factor peak value of vibration and noise reducing piece.The technical program be using equal number of with gear piece gap number,
There is different damping characteristic vibration and noise reducing piece to suppress gear noise, the plan of establishment of this vibration and noise reducing piece be also mainly for
Broadening vibration and noise reducing piece frequency suppresses scope, can use in the larger gear train assembly of some frequency noise scopes.
The vibration and noise reducing piece of the present invention can adopt polymer damping material, it would however also be possible to employ alloy damping material, different
The different frequency of its fissipation factor peak value of the damping material of damping characteristic correspondence, can have a lot of selections.Such as macromolecule material
Ethylene propylene diene rubber in material corresponding frequency is 750hz, and butyl rubber is 450 hz, and natural rubber is 580 hz
Left and right, 2 chlorobutadiene-acrylonitrile copolymer is 250 hz；Polyacrylate, polyurethane, epoxy resin can also be selected
And nitrile rubber etc..Damping alloy also has a large amount in variety, such as al-zn alloy, mn-cu alloy, mg-zi alloy and ni-ti alloy
Multiple high-damping such as fe-cr-al, fe-al, fe-mo, fe-w, fe-cr-mo, fe-cr-co is just had to close Deng, iron-based damping alloy
Golden material, the description of vibration and noise reducing material and its characteristic belong to known technology, can be public according to the present invention when actually used
The system of selection opened the actual condition selection suitable material making vibration and noise reducing piece according to gear or gear train.
Preferably, vibration and noise reducing piece is provided with frequency fine tuning hole, described frequency fine tuning hole is 3 to 6, along inner blade
Circumference be evenly arranged, the frequency fine tuning hole on adjacent two panels vibration and noise reducing piece shifts to install.Setting frequency on vibration and noise reducing piece
The damped frequency peak point position corresponding to vibration and noise reducing piece can be finely tuned in rate fine setting hole, so that vibration and noise reducing piece meets difference
Frequency suppression require, frequency fine tuning hole can be arranged on part vibration and noise reducing piece it is also possible to be arranged on all of vibration damping fall
Make an uproar on piece, when being respectively provided with frequency fine tuning hole on adjacent two panels vibration and noise reducing piece it should avoid frequency fine tuning hole to occur in gear
Same axial direction on, that is, avoid part gear piece both sides that the situation of cavity occurs simultaneously, prevent from causing new vibration.
The processing method of combined variable tooth thickness gear of the present invention is: some foils are added by the profile of tooth of regulation and size
Work becomes thickening gear piece, by each gear piece by regulation order alignment overlapped, and between gear piece glued joint vibration and noise reducing piece, by
All gear pieces are fixed by fixing in the hole setting screw or rivet, are finally constituted a complete change transverse tooth thickness tangent modification internal tooth
Wheel construction.
The invention has the beneficial effects as follows: it efficiently solves the variable tooth thickness gear processing difficulties of prior art and existing skill
The big problem of the variable tooth thickness gear gearing noise of art, the combined variable tooth thickness gear of the present invention, with gear piece overlapping combinations mode structure
Become gear, unlike material, different-thickness can be adopted, and the foil polish of different heat treatment state forms gear piece,
Gearmaking Technology is good, applies simple technique just can complete Hardened gear face and the processing of high-precision variable tooth thickness gear, thus carrying
The bearing capacity of high actuating device and running precision；And glued joint vibration and noise reducing piece between gear piece, suppression gear from root
Mesh vibration, decreases rotational noise, extends the service life of gear pair, is particularly well-suited to high-precision actuating device.
Brief description
Fig. 1 is a kind of structural representation of combined variable tooth thickness gear of the present invention；
Fig. 2 is a kind of cross-sectional structure schematic diagram of internal gear of the present invention；
A kind of structural representation of Fig. 3 inner blade of the present invention；
A kind of structural representation of Fig. 4 vibration and noise reducing of the present invention piece.
In figure: 1. outer gear piece, 2. inner blade, 3. vibration and noise reducing piece, the 4. gear teeth, 5. fixing hole, 6. frequency fine tuning hole, 7. riveting
Nail.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
In embodiment 1 shown in Fig. 1 Fig. 2, a kind of combined variable tooth thickness gear, described gear has identical tooth by 10
The annular gear piece sequential combination counting and having thickening profile of tooth is constituted, and the gear teeth of gear piece are arranged on the inner periphery of annular gear piece
On, described gear piece include located at gear axial direction two ends outer gear piece 1 and be located at two outer gear pieces between 8 inner blade 2(see figure
3), the thickness of all inner blades is equal, and the thickness of outer gear piece is 4 times of inner blade thickness, and all glueing joint between adjacent gear piece has
Vibration and noise reducing piece 3, arranges 9 vibration and noise reducing pieces altogether, and the thickness of described vibration and noise reducing piece is the 30% of inner blade thickness, gear piece
Annulus is provided with some fixing holes 5 for fixing gear piece, and the tip diameter of described gear piece and root diameter are all equal, institute
State the same axial increasing or decreasing of the transverse tooth thickness of gear piece along gear, the modification coefficient of gear changes along gear is axially linear, interior
Outer gear piece and vibration and noise reducing piece are fixed by rivet 7 one being arranged on fixing in the hole, and inside and outside gear piece and vibration and noise reducing piece are constituted
One complete change transverse tooth thickness tangent modification internal spur gear structure.
Embodiment 2
The gear of embodiment 2 is helical gear, and the thickness of 7 in gear piece inner blade is equal, and vibration and noise reducing piece is 8, position
Thickness in the vibration and noise reducing piece of the larger inner blade side of transverse tooth thickness is more than the vibration damping fall positioned at transverse tooth thickness less inner blade side
Make an uproar the thickness of piece, the thickness of vibration and noise reducing piece changes along gear is axially linear, and the minimum thickness of vibration and noise reducing piece is inner blade
The 15% of thickness, the maximum gauge of vibration and noise reducing piece is the 30% of inner blade thickness, and the thickness of outer gear piece is equal and its thickness is interior
3 times of gear piece thickness, remaining is identical with embodiment 1.
Embodiment 3
In embodiment 3, gear includes 9 inner blades and 10 vibration and noise reducing pieces, and inner blade has different thickness, tooth
The thickness of thick less inner blade is more than the thickness of the larger inner blade of transverse tooth thickness, and the thickness of maximum gauge inner blade is minimum thickness
1.8 times of the thickness of inner blade, the thickness of inner blade changes along gear is axially linear, and the thickness of all vibration and noise reducing pieces is equal
And its thickness is the 18% of maximum inner blade thickness, the thickness of outer gear piece is equal and its thickness be maximum inner blade thickness 2.5
Times, remaining is identical with embodiment 1 or embodiment 2.
Embodiment 4
In example 4, gear includes 10 inner blades and 11 vibration and noise reducing pieces, and inner blade has different thickness,
The thickness of the less inner blade of transverse tooth thickness is more than the thickness of the larger inner blade of transverse tooth thickness, and the thickness of maximum gauge inner blade is minimum thick
1.6 times of the thickness of degree inner blade, the thickness of inner blade changes along gear is axially linear；Vibration and noise reducing piece has different thickness
Degree, the thickness of the vibration and noise reducing piece positioned at the larger inner blade side of transverse tooth thickness is more than subtracting positioned at transverse tooth thickness less inner blade side
Shake the thickness of noise reduction piece, and the thickness of maximum gauge vibration and noise reducing piece is 1.7 times of the thickness of minimum thickness vibration and noise reducing piece, vibration damping
The thickness of noise reduction piece changes along gear is axially linear, and the maximum gauge of vibration and noise reducing piece is the 20% of maximum inner blade thickness, outward
The thickness of gear piece is equal and its thickness is 2 times of thickness of maximum inner blade, and remaining is identical with embodiment 1 or embodiment 2.
Embodiment 5
In embodiment 5, the total quantity of gear inner blade is odd number, including 11 inner blades and 12 vibration and noise reducing pieces,
Inner blade includes the internal tooth chip architecture of two kinds of different hardness, and the difference of its hardness number of the inner blade of two kinds of different hardness is in high rigidity
The 10% of gear piece hardness number, the inner blade of two kinds of different hardness is alternately arranged, its hardness of the inner blade adjacent with outer gear piece be higher than with
Its adjacent inner blade, described outer gear piece adopts composite damping steel plate structure.The inner blade of two kinds of different hardness of the present embodiment
It is that commaterial is obtained by different heat treatment modes it is also possible to select the different material of two kinds of hardness.Embodiment 5 every
Piece vibration and noise reducing piece is made up of single damping material, and gear is provided with the vibration damping that two kinds of damping materials by different damping characteristic are constituted
Noise reduction piece, the fissipation factor peak value of two kinds of vibration and noise reducing pieces corresponds to two kinds of frequencies, two kinds of vibration and noise reducing pieces gear gear piece it
Between be alternately arranged, remaining with embodiment 1 embodiment 2 or embodiment 3 or embodiment 4 identical.
Embodiment 6
In embodiment 6, gear includes 5 inner blades and 6 vibration and noise reducing pieces, and every vibration and noise reducing piece is by single damping
Material is constituted, and gear is provided with the vibration and noise reducing piece that three kinds of damping materials by different damping characteristic are constituted, every kind of vibration and noise reducing piece
The corresponding not frequency of fissipation factor peak value, the vibration and noise reducing piece of different damping characteristic alternate cycles cloth between the gear piece of gear
Put.The vibration and noise reducing piece of the present embodiment is three kinds, and the gear piece gap number of gear is six, and three kinds of vibration and noise reducing pieces are in the axle of gear
Adopt the arrangement mode of 1+2+3+1+2+3 upwards, remaining with embodiment 1 embodiment 2 or embodiment 3 or embodiment 4 identical.
Embodiment 7
In embodiment 7, gear includes 6 inner blades and 7 vibration and noise reducing pieces, and every vibration and noise reducing piece is by single damping
Material is constituted, and on gear, the vibration and noise reducing piece of diverse location is made up of the damping material of different damping characteristic, every vibration and noise reducing
The fissipation factor peak value different frequencies of correspondence of piece, the vibration and noise reducing piece of different damping characteristic press in the axial direction of gear loss because
Frequency size corresponding to sub- peak value is arranged in order, its fissipation factor peak of vibration and noise reducing piece that outer gear piece less with transverse tooth thickness is close to
Its frequency corresponding to fissipation factor peak value of vibration and noise reducing piece that the corresponding frequency of value is close to higher than the outer gear piece larger with transverse tooth thickness
Rate, remaining with embodiment 1 embodiment 2 or embodiment 3 or embodiment 4 identical.
Embodiment 8
In embodiment 8, vibration and noise reducing piece is provided with frequency fine tuning hole 6(and sees Fig. 4), described frequency fine tuning hole is 6,
Circumference along inner blade is evenly arranged, and the frequency fine tuning hole on adjacent two panels vibration and noise reducing piece shifts to install, and the present embodiment is subtracting
Shake and the version in frequency fine tuning hole is arranged on noise reduction piece can adopt on the vibration and noise reducing piece of an any of the above described embodiment,
In the middle of above-described embodiment 1-7, the new embodiment of the present invention is just constituted using the vibration and noise reducing piece with frequency fine tuning hole, frequently
Rate fine setting hole can be arranged on part vibration and noise reducing piece it is also possible to be arranged on all of vibration and noise reducing piece.
The vibration and noise reducing piece of the present invention can adopt polymer damping material, it would however also be possible to employ alloy damping material, different
The different frequency of its fissipation factor peak value of the damping material of damping characteristic correspondence, can have a lot of selections.Such as macromolecule material
Ethylene propylene diene rubber in material corresponding frequency is 750hz, and butyl rubber is 450 hz, and natural rubber is 580 hz
Left and right, 2 chlorobutadiene-acrylonitrile copolymer is 250 hz；Polyacrylate, polyurethane, epoxy resin can also be selected
And nitrile rubber etc..Damping alloy also has a large amount in variety, such as al-zn alloy, mn-cu alloy, mg-zi alloy and ni-ti alloy
Multiple high-damping such as fe-cr-al, fe-al, fe-mo, fe-w, fe-cr-mo, fe-cr-co is just had to close Deng, iron-based damping alloy
Golden material, the description of vibration and noise reducing material and its characteristic belong to known technology, can be public according to the present invention when actually used
The system of selection opened the actual condition selection suitable material making vibration and noise reducing piece according to gear or gear train.
The processing method of combined variable tooth thickness gear of the present invention is: some thin slices are processed into by the profile of tooth of regulation and size
Thickening gear piece, each gear piece is overlapped by the order alignment of regulation, and is gluedd joint vibration and noise reducing piece between gear piece, by fixing
All gear pieces are fixed by the hole setting screw or rivet, are finally constituted a complete change transverse tooth thickness tangent modification internal tooth rolling hitch
Structure.
If the combined variable tooth thickness gear of the present invention is combined by the gear piece that dry tablet has thickening profile of tooth constituting, gear piece includes setting
Put some inner blades between outer gear piece and outer gear piece in the both ends of the surface of gear axial direction, between adjacent gear piece, glued joint vibration damping fall
Make an uproar piece, inside and outside gear piece and vibration and noise reducing piece by fixing in the screw of fixing in the hole or rivet joint, thus constituting an entirety
Variable tooth thickness gear.Variable tooth thickness gear is constituted using overlapping combinations mode, because single gear piece thickness is less, therefore easily reaches and add
Work requires, and Gearmaking Technology is good, applies simple technique just can complete Hardened gear face and the processing of high-precision variable tooth thickness gear,
Solve the problems, such as the variable tooth thickness gear processing difficulties of prior art.In addition, being equipped with vibration damping between the adjacent gear piece of the present invention
Noise reduction piece, vibration and noise reducing piece has high damping characteristic, by it between gear piece, can effectively suppress gear engagement cause shake
Dynamic, the mesh vibration of gear being reduced from root, reducing rotational noise, thus reducing noise.The structure of the therefore present invention can
Big with the variable tooth thickness gear gearing noise that solves the problems, such as prior art, the service life of gear pair can also be extended simultaneously, special
It is not applied to high-precision actuating device.
In addition to the implementation, in the scope disclosed in claims of the present invention and description, the skill of the present invention
Art feature or technical data can be reselected and be combined, thus constituting new embodiment, these present invention are not in detail
The embodiment of thin description is that those skilled in the art just can realize easily without creative work, and therefore these are not detailed
The embodiment of description also should be regarded as the specific embodiment of the present invention and within protection scope of the present invention.
Claims (7)
1. a kind of combined variable tooth thickness gear it is characterised in that: if described gear has the identical number of teeth by dry tablet and has thickening
The annular gear piece sequential combination of profile of tooth is constituted, and the gear teeth (4) of gear piece are arranged on the inner periphery of annular gear piece, described gear piece
Including the outer gear piece (1) located at gear axial direction two ends and some inner blades (2) between two outer gear pieces, the thickness of outer gear piece
More than the thickness of inner blade, all glued joint between adjacent gear piece has vibration and noise reducing piece (3) to degree, and the annulus of gear piece is provided with some use
In the fixing hole (5) of fixing gear piece, the tip diameter of described gear piece and root diameter are all equal, the transverse tooth thickness edge of described gear piece
The same axial increasing or decreasing of gear, inside and outside gear piece and vibration and noise reducing piece constitute a complete change transverse tooth thickness tangent modification internal tooth
Wheel construction；Inner blade includes the internal tooth chip architecture of two kinds of different hardness, and the difference of its hardness number of the inner blade of two kinds of different hardness is
The 10% to 15% of high rigidity inner blade hardness number, the inner blade of two kinds of different hardness is alternately arranged, the total quantity of described inner blade
For odd number, its hardness of the inner blade adjacent with outer gear piece is higher than the inner blade being adjacent, and described outer gear piece adopts composite damping
Steel plate structure；Every vibration and noise reducing piece is made up of single damping material, and gear is provided with two kinds of damping materials by different damping characteristic
The vibration and noise reducing piece that material is constituted, the fissipation factor peak value of two kinds of vibration and noise reducing pieces corresponds to two kinds of frequencies, and two kinds of vibration and noise reducing pieces exist
It is alternately arranged between the gear piece of gear.
2. combined variable tooth thickness gear according to claim 1 it is characterised in that: the gear teeth of described gear are straight-tooth or tiltedly
Tooth, the modification coefficient of described gear changes along gear is axially linear.
3. combined variable tooth thickness gear according to claim 1 it is characterised in that: the thickness of all inner blades is equal, institute
Have vibration and noise reducing piece thickness is equal and its thickness is the 15% to 30% of inner blade thickness, the thickness of outer gear piece is equal and its thickness
It is 3 to 5 times of inner blade thickness.
4. combined variable tooth thickness gear according to claim 1 it is characterised in that: the thickness of all inner blades is equal, position
Thickness in the vibration and noise reducing piece of the larger inner blade side of transverse tooth thickness is more than the vibration damping fall positioned at transverse tooth thickness less inner blade side
Make an uproar the thickness of piece, the thickness of vibration and noise reducing piece changes along gear is axially linear, and the minimum thickness of vibration and noise reducing piece is inner blade
The 15% to 20% of thickness, the maximum gauge of vibration and noise reducing piece is the 25% to 30% of inner blade thickness, the thickness of outer gear piece equal and
Its thickness is 3 to 5 times of inner blade thickness.
5. combined variable tooth thickness gear according to claim 1 it is characterised in that: the thickness of the less inner blade of transverse tooth thickness is big
In the thickness of the larger inner blade of transverse tooth thickness, the thickness of maximum gauge inner blade is the 1.5 to 2 of the thickness of minimum thickness inner blade
Times, the thickness of inner blade changes along gear is axially linear, and the thickness of all vibration and noise reducing pieces is equal and its thickness is imperial palace
The 10% to 20% of gear piece thickness, the thickness of outer gear piece is equal and its thickness is 2 to 3 times of thickness of maximum inner blade.
6. combined variable tooth thickness gear according to claim 1 it is characterised in that: the thickness of the less inner blade of transverse tooth thickness is big
In the thickness of the larger inner blade of transverse tooth thickness, the thickness of maximum gauge inner blade is the 1.5 to 2 of the thickness of minimum thickness inner blade
Times, the thickness of inner blade changes along gear is axially linear；Thickness positioned at the vibration and noise reducing piece of the larger inner blade side of transverse tooth thickness
More than the thickness of the vibration and noise reducing piece positioned at transverse tooth thickness less inner blade side, the thickness of maximum gauge vibration and noise reducing piece is to degree
1.5 to 2 times of the thickness of little thickness vibration and noise reducing piece, the thickness of vibration and noise reducing piece changes along gear is axially linear, and vibration damping drops
The maximum gauge of piece of making an uproar is the 15% to 30% of maximum inner blade thickness, and the thickness of outer gear piece is equal and its thickness is maximum inner blade
2 to 3 times of thickness.
7. the combined variable tooth thickness gear according to any one of claim 1-6 it is characterised in that: vibration and noise reducing piece is provided with
Frequency fine tuning hole (6), described frequency fine tuning hole is 3 to 6, and the circumference along inner blade is evenly arranged, adjacent two panels vibration damping fall
The frequency fine tuning hole made an uproar on piece shifts to install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510068215.1A CN104675955B (en) | 2015-02-09 | 2015-02-09 | Combined variable tooth thickness gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510068215.1A CN104675955B (en) | 2015-02-09 | 2015-02-09 | Combined variable tooth thickness gear |
Publications (2)
| Publication Number | Publication Date |
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| CN104675955A CN104675955A (en) | 2015-06-03 |
| CN104675955B true CN104675955B (en) | 2017-01-25 |
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| CN201510068215.1A Expired - Fee Related CN104675955B (en) | 2015-02-09 | 2015-02-09 | Combined variable tooth thickness gear |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111853202A (en) * | 2020-06-23 | 2020-10-30 | 广西玉柴机器股份有限公司 | Vibration reduction gear and engine thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB256254A (en) * | 1925-07-29 | 1927-06-30 | Alfred Thomas Harman | Improved toothed gear wheel |
| GB326048A (en) * | 1929-04-02 | 1930-03-06 | Arthur Keighley | Improvements in and relating to laminated staggered tooth gears |
| US2228828A (en) * | 1938-12-29 | 1941-01-14 | Katakura Seishi Boseki Kabushi | Noiseless toothed wheel |
| US3988942A (en) * | 1975-04-28 | 1976-11-02 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag | Laminated gear |
| CN1412456A (en) * | 2002-11-20 | 2003-04-23 | 赵永彬 | Gear and its production method |
| CN101285520B (en) * | 2008-05-30 | 2010-11-03 | 重庆大学 | Tooth thickness variable cylinder profile modified gear and gearing device using same |
| CN201502683U (en) * | 2009-08-21 | 2010-06-09 | 陈翊柜 | Combined gear |
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