CN101701618A - None self-locking worm and worm wheel retarding mechanism - Google Patents
None self-locking worm and worm wheel retarding mechanism Download PDFInfo
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- CN101701618A CN101701618A CN200910310607A CN200910310607A CN101701618A CN 101701618 A CN101701618 A CN 101701618A CN 200910310607 A CN200910310607 A CN 200910310607A CN 200910310607 A CN200910310607 A CN 200910310607A CN 101701618 A CN101701618 A CN 101701618A
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- worm
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- worm wheel
- retarding mechanism
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Abstract
The invention discloses a none self-locking worm and worm wheel retarding mechanism which comprises an Archimedean worm and a worm wheel in transmission fit with the Archimedean worm, wherein a tooth surface of the worm wheel is an outwards involute helical tooth surface, the worm wheel is made of nylon 1010, and the surface roughness Ra of the tooth surface of the Archimedean worm is smaller than 0.1 micron. the obtained none self-locking worm and worm wheel retarding mechanism has a frictional angle rho smaller than 3 degrees and can realize no self-locking under the condition without changing the original mechanical transmission characteristic of worms and worm wheels, the none self-locking worm and worm wheel retarding mechanism can replace the prior various worm wheels, and no self-locking can be realized while the output mode and the speed ratio parameter of a reduction box body are not changed; when in production, a power source disappears, and the none self-locking worm and worm wheel retarding mechanism can be reversely transmitted with not need of adding kickoff mechanisms including a clutch and the like if special conditions including power failure occur, bringing convenience to production, and simultaneously reducing noise and saving cost.
Description
Technical field
The present invention relates to a kind of drive mechanism, especially a kind of none self-locking worm and worm wheel retarding mechanism.
Background technique
Common turbine and worm decelerator is self-locking mechanism substantially, it is in 3 °～5 ° from locking angle γ, the transmission direction of moment can only be to import into to the worm gear end from worm screw end to export, if power source occurring disappears, as special circumstances such as power failures, this moment need again to by the transmission object from the reverse driving of output terminal, common way is that certain link in the Transmitted chains is installed additional the clutch kickoff mechanism, implementing clutch frees and can realize, brought inconvenience to production, people also thirst for the worm and gear of this routine always can realize not self-locking.According to studies show that of the drive characteristic of worm and gear, when transmission is initiatively the time with the worm gear, its effectiveness formula is that (γ-ρ)/tan γ when satisfying friction angle ρ＜γ, can realize not self-locking to η=tan.And friction angle ρ=arctan μ (μ is the engaging friction coefficient), because the influence factor of μ is more, as worm and gear transmission type, relative sliding velocity, material property, flank of tooth processing situation, lubrication circumstances, all will influence engaging friction coefficient μ, in order to satisfy the situation of friction angle ρ＜γ, must be by a large amount of tests, employing is in conjunction with different worm and gear transmission types, material property, flank of tooth processing situation etc., workload is big, experimentation cost is very high, so existingly be in 3 °～5 ° turbine and worm decelerator from locking angle γ and be difficult to satisfy the situation of friction angle ρ＜γ, especially under the less situation of Sliding velocity (as less than 0.05m/s), being the speed conditions that artificial reverse driving can reach, making friction angle ρ be reduced to the situation littler than γ, is to be difficult to realize under the usual conditions.
Summary of the invention
The objective of the invention is a kind of friction angle ρ of providing for the deficiency that solves above-mentioned technology less than 3 ° none self-locking worm and worm wheel retarding mechanism.
In order to achieve the above object, the none self-locking worm and worm wheel retarding mechanism that the present invention is designed, it comprises Archimedes' worm and the worm gear that cooperates with its transmission, the flank of tooth of described worm gear is outer involute helical tooth flank, this worm gear is made by nylon 1010, and the flank of tooth surface roughness of described Archimedes' worm is less than Ra0.1um.
In this structure, from the essence of the visible engagement of worm shaft section is the gear rack transmission, engagement system changes outer flank of tooth engagement into by the engagement of worm gear inner toothed surface, by face contact a becoming contact, the change of engagement pair form reduces engaging friction coefficient μ, then cause friction angle ρ to reduce, change condition of self-locking.In addition, the flank of tooth surface roughness of Archimedes' worm is the key factor that obtains non-comparatively easily self-locking effect, therefore our company has done a large amount of experiments and has reached a conclusion, when flank of tooth surface roughness can make engaging friction coefficient μ reduce to lower during less than Ra0.1um, in conjunction with the little characteristics of nylon 1010 friction factor, final friction angle ρ is decreased to the situation less than 3 °, satisfies the situation of friction angle ρ＜γ, thereby realizes not self-locking.
For the flank of tooth surface roughness that makes Archimedes' worm less than Ra0.1um, worm tooth-surface technology can adopt the extruding mirror process.
The none self-locking worm and worm wheel retarding mechanism that the present invention obtains, friction angle ρ is less than 3 °, under the situation that does not change the original mechanical transmission characteristic of worm and gear, can realize not self-locking, can replace existing various worm gear, in the way of output that does not change deceleration box and speed ratio parameter, can realize not self-locking, power source when producing, occurs and disappear, as special circumstances such as power failures, can reverse transmission, need not to install additional kickoff mechanisms such as clutch, brought facility to production; Simultaneously can reduce noise, save cost.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a partial sectional view of the present invention.
Embodiment
The invention will be further described in conjunction with the accompanying drawings below by embodiment.
As shown in Figure 1, the described none self-locking worm and worm wheel retarding mechanism of present embodiment, it comprises Archimedes' worm 1 and the worm gear 2 that cooperates with its transmission, the flank of tooth of described worm gear 2 is outer involute helical tooth flank, this worm gear 2 is made by nylon 1010, worm screw is formed from steel, worm tooth-surface process using extruding mirror process, and its flank of tooth surface roughness is less than Ra0.1um.
As shown in Figure 2, in this structure, from the essence of the visible engagement of worm shaft section is the gear rack transmission, engagement system changes outer flank of tooth engagement into by the engagement of worm gear 2 inner toothed surface, by face contact a becoming contact, the change of engagement pair form reduces engaging friction coefficient μ, causes friction angle ρ to reduce then, changes condition of self-locking.
Nylon is as a kind of common used in industry material, be widely used in various mechanical parts manufacturing, piston ring as the nylon manufacturing, seal ring, slide block, impeller, cam, nut etc., but nylon is as the application of mechanical material, mainly be to get its mechanical strength height, good toughness, shock resistance, antifatigue, wear resistance is good, the characteristics that chemical stability is good, but worm gear 2 is because its drive characteristic is different with other mechanical parts such as grade, traditional thinking is that nylon intensity is not as steel, mechanical parts such as copper, damage easily, thereby deformation does not reach using effect, and is especially stressed easier like this when self-locking, thereby prior art does not adopt nylon to make worm gear 2 usually; And our company reaches a conclusion through a large amount of experiments, and various nylon are attempted, and finds that the friction factor of steel and nylon 1010 is 0.02, and nylon 1010 more is applicable to not self-locking structure of the present invention; Our company passes through the research to the flank of tooth surface roughness of Archimedes' worm 1 in addition, think that flank of tooth surface roughness is the key factor that obtains non-comparatively easily self-locking effect, therefore our company has done a large amount of experiments and has reached a conclusion, when flank of tooth surface roughness during less than Ra0.1um, in conjunction with the above-mentioned kind of drive, make worm gear 2 with nylon 1010, can make engaging friction coefficient μ reduce to lower, final friction angle ρ is decreased to the situation less than 3 °, satisfy the situation of friction angle ρ＜γ, thus realize not self-locking and also need not to change worm gear 2 worm screws other output transmission parameter.
Claims (2)
1. none self-locking worm and worm wheel retarding mechanism, the worm gear (2) that it comprises Archimedes' worm (1) and cooperates with its transmission, the flank of tooth that it is characterized in that described worm gear (2) is outer involute helical tooth flank, this worm gear (2) is made by nylon 1010, and the flank of tooth surface roughness of described Archimedes' worm (1) is less than Ra0.1um.
2. none self-locking worm and worm wheel retarding mechanism according to claim 1 is characterized in that worm tooth-surface process using extruding mirror process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910310607A CN101701618A (en) | 2009-11-30 | 2009-11-30 | None self-locking worm and worm wheel retarding mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910310607A CN101701618A (en) | 2009-11-30 | 2009-11-30 | None self-locking worm and worm wheel retarding mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101701618A true CN101701618A (en) | 2010-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910310607A Pending CN101701618A (en) | 2009-11-30 | 2009-11-30 | None self-locking worm and worm wheel retarding mechanism |
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| CN (1) | CN101701618A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016625A (en) * | 2011-09-23 | 2013-04-03 | 鞍钢重型机械有限责任公司 | Circular arc helical gear pair |
| CN104110463A (en) * | 2014-06-20 | 2014-10-22 | 南京康尼机电股份有限公司 | Compact type worm gear reducer capable of achieving low temperature resistance and low noise |
| CN105134881A (en) * | 2015-07-08 | 2015-12-09 | 曹西京 | Worm wheel and worm mechanism with reverse output function |
| CN109969762A (en) * | 2019-03-28 | 2019-07-05 | 刘哲森 | A kind of single track separate type cam slide unit |
| CN110735576A (en) * | 2019-10-30 | 2020-01-31 | 徐州恒永电子科技有限公司 | automatic control system for travel of electric window opener |
| CN111955876A (en) * | 2020-08-20 | 2020-11-20 | 邹翔宇 | Luggage case convenient to push and pull |
-
2009
- 2009-11-30 CN CN200910310607A patent/CN101701618A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016625A (en) * | 2011-09-23 | 2013-04-03 | 鞍钢重型机械有限责任公司 | Circular arc helical gear pair |
| CN104110463A (en) * | 2014-06-20 | 2014-10-22 | 南京康尼机电股份有限公司 | Compact type worm gear reducer capable of achieving low temperature resistance and low noise |
| CN105134881A (en) * | 2015-07-08 | 2015-12-09 | 曹西京 | Worm wheel and worm mechanism with reverse output function |
| CN109969762A (en) * | 2019-03-28 | 2019-07-05 | 刘哲森 | A kind of single track separate type cam slide unit |
| CN110735576A (en) * | 2019-10-30 | 2020-01-31 | 徐州恒永电子科技有限公司 | automatic control system for travel of electric window opener |
| CN111955876A (en) * | 2020-08-20 | 2020-11-20 | 邹翔宇 | Luggage case convenient to push and pull |
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Open date: 20100505 |