CN103807408A - Variable-axial-pressure-angle gear - Google Patents
Variable-axial-pressure-angle gear Download PDFInfo
- Publication number
- CN103807408A CN103807408A CN201410010206.2A CN201410010206A CN103807408A CN 103807408 A CN103807408 A CN 103807408A CN 201410010206 A CN201410010206 A CN 201410010206A CN 103807408 A CN103807408 A CN 103807408A
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- China
- Prior art keywords
- pressure angle
- gear
- axial
- tooth
- variable pressure
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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
- F16H55/18—Special devices for taking up backlash
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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
- F16H55/10—Constructively simple tooth shapes, e.g. shaped as pins, as balls
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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
- F16H55/14—Construction providing resilience or vibration-damping
- F16H55/16—Construction providing resilience or vibration-damping relating to teeth only
Abstract
The invention provides a variable-axial-pressure-angle gear capable of effectively eliminating or reducing backlash in circular tooth and return difference. The variable-axial-pressure-angle gear is provided with an inner end surface and an outer end surface, wherein the inner end surface is meshed with other gears and opposite to the outer end surface, one or two sides of gear teeth of the variable-axial-pressure-angle gear have a pressure angle changing in the axial direction of the variable-axial-pressure-angle gear from the inner end surface to the outer end surface, and included angles with opposite tooth surface cones are formed between the tooth crest and the pitch circle and between the tooth root and the pitch circle of the same-side tooth surface of one or more sides of the gear teeth respectively. In this way, the backlash in circular tooth and return difference can be effectively eliminated or reduced by the variable-axial-pressure-angle gear, axial forces generated during meshing can offset each other, and therefore vibration and noise are reduced, bearing ability and transmission rigidity are improved, and the service life of the variable-axial-pressure-angle gear is prolonged.
Description
Technical field
The present invention relates to mechanical transmission fields, particularly, relate to a kind of axial variable pressure angle gear that can regulate sideshake.
Background technique
Along with the growth requirement of precision drive, to realizing disappear gap transmission and sideshake adjusting device, requirements at the higher level are proposed.In traditional precision gear transmission, in order to realize disappear gap transmission and the adjustable engagement of sideshake, there is complex structure and assemble the shortcomings such as more difficult in conventional technological scheme.For this reason, conventionally adopt the Conical Involute Gears (for example U.S. Pat 3174356, US3171212 and US5400672) of radial shift to solve the problems referred to above.But for the Conical Involute Gears of radial shift, because top circle is tapered, when engagement, its slip ratio constantly changes vertically, will directly increase gear-box wearing and tearing, reduces working life.
In order to overcome above-mentioned shortcoming, Chinese invention patent CN100575750C discloses a kind of adjustable side play and variable thickness gear driving pair, the gear of this gear driving pair by flank profil from the long middle part of tooth respectively to the two ends end face axial of tooth gradually thickening and attenuation realize beveloid gear, thereby control transmission sideshake.In addition, Chinese invention patent CN101285520B discloses a kind of tooth thickness variable cylinder modified gear.This gear adopts coefficient of profile tangential shift dangerous section axially to change by ascending rule along gear disk, the ascending direction of the coefficient of profile tangential shift dangerous section of two flank of tooth of the gear teeth is identical, thereby make two flank of tooth shapes of the gear teeth at a certain angle, eliminate thus or reduce backlash and return difference.
The flank of tooth of the disclosed gear of above-mentioned existing patent documentation is all to form in one direction angle, this makes gear in the time of transmission, inevitably produce axial force, the axial force producing when gear transmission can cause gear axial float, increases vibration and noise, and reduces working life.In addition, the transverse tooth thickness of the disclosed beveloid gear of above-mentioned existing patent documentation is all at an end face thickening, another end face attenuation, bearing capacity and the transmission stiffness of the whole flank of tooth are reduced to transverse tooth thickness attenuation end by transverse tooth thickness thickening end vertically, in gear transmission, cause contact force and distribute uneven phenomenon, more easily cause gear teeth generation fatigue damage.
Summary of the invention
In order to address the above problem, to the invention provides and a kind ofly can effectively eliminate or reduce the axial variable pressure angle gear that backlash and return difference and axial force can be cancelled out each other.Axial variable pressure angle gear according to the present invention can reduce vibration and noise, thereby realizes precision drive, improves bearing capacity and transmission stiffness simultaneously.
Axial variable pressure angle gear according to the present invention have with the interior edge face of other gear engagement and with interior edge face relative exterior edge face, wherein at least one side in the both sides of the gear teeth of axial variable pressure angle gear has the pressure angle axially changing from the outside end face of interior edge face along axial variable pressure angle gear, and the corresponding flanks of described at least one side of the gear teeth forms respectively the contrary angle of flank of tooth taper from tooth top to pitch circle region and from tooth root to pitch circle region.
According to an aspect of the present invention, a side of the gear teeth has the pressure angle changing from the outside end face of interior edge face along axially.
The pressure angle of a described side of the gear teeth can ascendingly change.
Alternatively, the pressure angle of a described side of the gear teeth also can descendingly change.
According to another aspect of the present invention, the both sides of the gear teeth all have the pressure angle changing from the outside end face of interior edge face along axially.
The size of the pressure angle of the both sides of the gear teeth changes according to identical Changing Pattern.
Alternatively, the size of the pressure angle of the both sides of the gear teeth also can change according to different Changing Patterns.
Further, the pressure angle of the gear teeth can change and any in changing of circular arc changes with linear change, parabola.
Accompanying drawing explanation
Above-mentioned and other side of the present invention and feature are by from presenting embodiment's explanation is clear below in conjunction with accompanying drawing, wherein:
Fig. 1 (a) is the axial variable pressure angle tooth-formation of gear schematic diagram according to the first embodiment of the present invention;
Fig. 1 (b) is the axial variable pressure angle tooth-formation of gear sectional view according to the first embodiment of the present invention;
Fig. 2 shows according to the stereogram of the structure of the axial variable pressure angle gear of the first embodiment of the present invention;
Fig. 3 (a) is axial variable pressure angle tooth-formation of gear schematic diagram according to a second embodiment of the present invention;
Fig. 3 (b) is axial variable pressure angle tooth-formation of gear sectional view according to a second embodiment of the present invention;
Fig. 4 is the stereogram that shows the structure of axial variable pressure angle gear according to a second embodiment of the present invention;
Fig. 5 is the axial variable pressure angle tooth-formation of gear sectional view of a third embodiment in accordance with the invention;
Fig. 6 is the axial variable pressure angle tooth-formation of gear sectional view of a fourth embodiment in accordance with the invention; And
Fig. 7 is the outer gearing schematic diagram according to axial variable pressure angle gear pair of the present invention.
Embodiment
The present invention relates to a kind of axially variable pressure angle gear, this axial variable pressure angle gear have with the interior edge face of other gear engagement and with described interior edge face relative exterior edge face.Axial variable pressure angle gear according to the present invention adopts the form of axial variable pressure angle, make the flank of tooth of gear tooth form certain taper angle along Gear axis, be capable of regulating meshing backlass by adjusting the axial position of intermeshing gear, thereby can effectively eliminate or reduce backlash and return difference, realize precision drive.In addition; the corresponding flanks that the pressure angle of axial variable pressure angle gear of the present invention changes forms respectively the contrary angle of flank of tooth taper from tooth top to pitch circle region and from tooth root to pitch circle region; the axial force producing when this makes to engage can be cancelled out each other, thereby reduces vibration and noise; And the thickness on pitch circle of the gear teeth remains unchanged vertically, further improve bearing capacity and transmission stiffness, therefore can increase the service life.
Particularly, there is the pressure angle axially changing from the outside end face of interior edge face along axial variable pressure angle gear according at least one side in the both sides of the gear teeth of axial variable pressure angle gear of the present invention, and the corresponding flanks of described at least one side of the gear teeth forms respectively the contrary angle of flank of tooth taper from tooth top to pitch circle region and from tooth root to pitch circle region.According to the present invention, the pressure angle of wheel flank can be along axially from the descending or ascending variation of the outside end face of interior edge face.In the case of the pressure angle of gear teeth both sides all changes, the size of pressure angle can change according to identical or different Changing Pattern.For example, in the situation that gear teeth pressure at both sides angle changes according to different Changing Patterns, the ascending variation of pressure angle of a side of the gear teeth, and the descending variation of the pressure angle of opposite side.In addition, the pressure angle of the gear teeth can change and any in changing of circular arc changes with linear change, parabola.
, enumerate with reference to the accompanying drawings illustrative of the present invention, non-limiting example below, so that axial variable pressure angle gear according to the present invention is elaborated.
Fig. 1 (a), Fig. 1 (b) and Fig. 2 have shown the axial variable pressure angle gear according to the first embodiment of the present invention.In the first embodiment, the flank of tooth pressure angle of gear teeth both sides all adopts along gear shaft to from the interior edge face linear change rule ascending towards exterior edge face.The solid line of Fig. 1 represents exterior edge face profile of tooth, and dotted line represents interior edge face profile of tooth.From left side flank profil, 1A-3A section is exterior edge face large pressure angle involute profile, and 2A-4A section is the little pressure angle involute profile of interior edge face, and 5A is pitch circle.Cross section IA and cross section IIA are respectively the cross section of the upper and lower two sections of somewhere involute gear tooths of pitch circle.8A and 9A are respectively the left and right profile of tooth schematic diagram of cross section IA, and 6A and 7A are respectively the left and right profile of tooth schematic diagram of cross section IIA.Can find out from schematic diagram, on the gear teeth two lateral tooth flanks, pitch circle 5A forms the outside angle of taper to the tooth top section flank of tooth, and pitch circle 5A forms the inside angle of taper to the tooth root section flank of tooth, and corresponding flanks forms the contrary angle (for example 6A and 8A, 7A and 9A) of taper.
Fig. 3 (a), Fig. 3 (b) and Fig. 4 have shown axial variable pressure angle gear according to a second embodiment of the present invention.The second embodiment of the present invention and the first embodiment's difference is, gear teeth left flank pressure angle adopts along gear shaft to from the ascending linear change rule of the outside end face of interior edge face, and right flank pressure angle adopts along gear shaft to from the descending linear change rule of the outside end face of interior edge face.Can find out from schematic diagram, on gear teeth left flank, pitch circle 5B forms the outside angle of taper to the tooth top section flank of tooth, and pitch circle 5B forms the inside angle of taper to the tooth root section flank of tooth.On gear teeth right flank, pitch circle 5B forms the inside angle of taper to the tooth top section flank of tooth, and pitch circle 5B forms the outside angle of taper to the tooth root section flank of tooth.That is to say, corresponding flanks forms the contrary angle (as 6B and 8B, 7B and 9B) of taper.
Fig. 5 is the axial variable pressure angle tooth-formation of gear sectional view of a third embodiment in accordance with the invention.In the 3rd embodiment, gear teeth left flank pressure angle adopts along gear shaft to from the ascending linear change rule of the outside end face of interior edge face, and right flank pressure angle is constant.On gear teeth left flank, pitch circle 5C forms the outside angle of taper to the tooth top section flank of tooth, and pitch circle 5C forms the inside angle of taper to the tooth root section flank of tooth, and corresponding flanks forms the contrary angle (as 6C and 8C) of taper.
Fig. 6 is the axial variable pressure angle tooth-formation of gear sectional view of a fourth embodiment in accordance with the invention.In the 4th embodiment, gear teeth left flank pressure angle adopts along gear shaft to from the ascending parabola Changing Pattern of the outside end face of interior edge face, and right flank pressure angle adopts along gear shaft to from the ascending linear change rule of the outside end face of interior edge face.On the gear teeth two lateral tooth flanks, pitch circle 5D forms the outside angle of taper to the tooth top section flank of tooth, and pitch circle 5D forms the inside angle of taper to the tooth root section flank of tooth, and corresponding flanks forms the contrary angle (as 6D and 8D, 7D and 9D) of taper.
The pressure angle that the present invention illustrates at least one side of gear tooth illustratively at this changes with linearity or parabola.But axial variable pressure angle gear according to the present invention is not limited to this, the pressure angle of at least one side of the gear teeth can along gear shaft to changing with any rule, for example, change with circular arc.
Fig. 7 is the outer gearing schematic diagram according to axial variable pressure angle gear pair of the present invention.Gear 10 is respectively the consistent axial variable pressure angle gear of Surface of action pressure angle Changing Pattern with gear 11, because corresponding flanks forms taper contrary angle at the pitch circle two sections flank of tooth, therefore can by regulating two engaging gears, right axial position be adjusted meshing backlass.Thereby, can effectively eliminate or reduce backlash and return difference according to axial variable pressure angle gear of the present invention, and the axial force that when engagement produces can cancel out each other, reduce vibration and noise, the good result increasing the service life thereby reach.According to axial variable pressure angle gear of the present invention, thickness on pitch circle remains unchanged vertically, arbitrary end section transverse tooth thickness is in thickening and the attenuation gradually respectively of pitch circle two sections, in gear transmission, contact force, along gear shaft to being evenly distributed, has further improved bearing capacity and the transmission stiffness of whole gear.
Although exemplary embodiments of the present invention is illustrated, obviously it will be understood by those skilled in the art that in the situation that not deviating from spirit of the present invention and principle and can change, its scope claims with and equivalent in limit.
Claims (8)
1. an axial variable pressure angle gear, described axial variable pressure angle gear have with the interior edge face of other gear engagement and with described interior edge face relative exterior edge face, wherein:
At least one side in the both sides of the gear teeth of described axial variable pressure angle gear has the pressure angle axially changing to described exterior edge face from described interior edge face along described axial variable pressure angle gear; And
The corresponding flanks of described at least one side of the described gear teeth forms respectively the contrary angle of flank of tooth taper from tooth top to pitch circle region and from tooth root to pitch circle region.
2. axial variable pressure angle gear according to claim 1, wherein, a side of the described gear teeth has the pressure angle axially changing to described exterior edge face from described interior edge face along described.
3. axial variable pressure angle gear according to claim 2, wherein, the ascending variation of pressure angle of a described side of the described gear teeth.
4. axial variable pressure angle gear according to claim 2, wherein, the descending variation of pressure angle of a described side of the described gear teeth.
5. axial variable pressure angle gear according to claim 1, wherein, the both sides of the described gear teeth all have the pressure angle axially changing to described exterior edge face from described interior edge face along described.
6. axial variable pressure angle gear according to claim 5, wherein, the size of the pressure angle of the both sides of the described gear teeth changes according to identical Changing Pattern.
7. axial variable pressure angle gear according to claim 5, wherein, the size of the pressure angle of the both sides of the described gear teeth changes according to different Changing Patterns.
8. according to the axial variable pressure angle gear described in any one in claim 1-7, wherein, any during the pressure angle of the described gear teeth changes with linear change, parabola variation and circular arc changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010206.2A CN103807408B (en) | 2014-01-09 | 2014-01-09 | Axial variable pressure angle gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010206.2A CN103807408B (en) | 2014-01-09 | 2014-01-09 | Axial variable pressure angle gear |
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| Publication Number | Publication Date |
|---|---|
| CN103807408A true CN103807408A (en) | 2014-05-21 |
| CN103807408B CN103807408B (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410010206.2A Active CN103807408B (en) | 2014-01-09 | 2014-01-09 | Axial variable pressure angle gear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106032838A (en) * | 2015-03-12 | 2016-10-19 | 哈尔滨理工大学 | Intelligent design of new-type line-contact space-meshing beveloid gear |
| WO2018190966A1 (en) * | 2017-04-10 | 2018-10-18 | Caterpillar Global Mining Llc | Gear tooth geometry for crowd gear assembly on rope shovel |
| US10634231B2 (en) | 2016-04-19 | 2020-04-28 | Ford Global Technologies, Llc | Gears with varying pressure angle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01288664A (en) * | 1988-05-13 | 1989-11-20 | Meidensha Corp | Mechanism for removing backlash of gear |
| KR20020038346A (en) * | 2000-11-17 | 2002-05-23 | 이계안 | Gear |
| JP2007247894A (en) * | 2006-02-15 | 2007-09-27 | Enplas Corp | Gear and gearing device |
| CN201093048Y (en) * | 2007-10-26 | 2008-07-30 | 天津建筑机械厂 | Gradual changing tooth thickness gear |
| CN102207185A (en) * | 2011-06-07 | 2011-10-05 | 南京航空航天大学 | Involute straight tooth cylinder profile shifted gear with modification coefficient changing gradually and axially and manufacturing method |
-
2014
- 2014-01-09 CN CN201410010206.2A patent/CN103807408B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01288664A (en) * | 1988-05-13 | 1989-11-20 | Meidensha Corp | Mechanism for removing backlash of gear |
| KR20020038346A (en) * | 2000-11-17 | 2002-05-23 | 이계안 | Gear |
| JP2007247894A (en) * | 2006-02-15 | 2007-09-27 | Enplas Corp | Gear and gearing device |
| CN201093048Y (en) * | 2007-10-26 | 2008-07-30 | 天津建筑机械厂 | Gradual changing tooth thickness gear |
| CN102207185A (en) * | 2011-06-07 | 2011-10-05 | 南京航空航天大学 | Involute straight tooth cylinder profile shifted gear with modification coefficient changing gradually and axially and manufacturing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106032838A (en) * | 2015-03-12 | 2016-10-19 | 哈尔滨理工大学 | Intelligent design of new-type line-contact space-meshing beveloid gear |
| US10634231B2 (en) | 2016-04-19 | 2020-04-28 | Ford Global Technologies, Llc | Gears with varying pressure angle |
| WO2018190966A1 (en) * | 2017-04-10 | 2018-10-18 | Caterpillar Global Mining Llc | Gear tooth geometry for crowd gear assembly on rope shovel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103807408B (en) | 2016-03-09 |
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Effective date of registration: 20170809 Address after: 224015 Salt Road, 318, Yancheng City, Jiangsu Patentee after: Jiangsu Zhongli Gear Co., Ltd. Address before: 224051 Yancheng City Lake Lake District, hope road, No. 9, Jiangsu Patentee before: Yangcheng Institute of Technology |