CN1257974A - Side gap adjustable, plane enveloped torus worm drive - Google Patents
Side gap adjustable, plane enveloped torus worm drive Download PDFInfo
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- CN1257974A CN1257974A CN 99117383 CN99117383A CN1257974A CN 1257974 A CN1257974 A CN 1257974A CN 99117383 CN99117383 CN 99117383 CN 99117383 A CN99117383 A CN 99117383A CN 1257974 A CN1257974 A CN 1257974A
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Abstract
A side gap adjustable, plane enveloped torus worm drive suitable for gun, machine-tool, elevator, servo tracking and precise drive equipment features that the tooth surface of worm gear is a plane, the tooth of worm gear appears as wedge in its axial direction, and each of the two side tooth surfaces of worm is an envelopment surface formed by using the relative side tooth plane as mother plane and enveloping based on the engagement relation of worm gear with worm. Its advantages are wide range of drive ratios, high load power and engagement performance, high drive reliability, and the ability to adjust side gap and compensate the abrasion by regulating the axial position of worm wheel.
Description
The present invention relates to a kind of worm drive, especially side gap adjustable, plane enveloped torus worm drive.
Worm drive belongs to the alternating axis transmission, has compact structure, stable drive, characteristics such as noise is low, and kinematic error is little.Thereby be widely used in the mechanized equipment as speed reducer and accurate transmission mechanism.Public worm drive at present mainly contains the transmission of straight-tooth wildhaber-wormaheel toroid helicoids worm, the toroid helicoids worm transmission of helical teeth wildhaber-wormaheel and dual lead cylindrical worm transmission etc.Wherein:
The transmission of straight-tooth wildhaber-wormaheel toroid helicoids worm is nineteen twenty-two U.S. E.Wildharber invention.It is the spur gear of flank profil with the straight line that its worm gear is one, and the flank of tooth is the plane with the worm-wheel shaft line parallel; Worm screw is one to surround the toroid helicoids worm of worm gear, its flank of tooth be with above-mentioned worm-gear tooth plane as generatrix, make the envelope surface that generating motion forms by the meshing relation of worm gear and worm screw, belong to planar double enveloping worm.Therefore, the worm screw of this transmission is hardenable and use the flat-faced wheel grinding, and tooth face hardness height, roughness are low, are easy to accurate the manufacturing; The number of teeth that worm gear and worm screw mesh simultaneously is many, can reach 3～4 times of cylindrical worm gearing transmission, and gear teeth circular pitch error is had average effect.The worm gear flank of tooth is the plane, but grinding is easy to carry out precision machining, and because when it and worm meshing, instantaneous contact line only is distributed in the engaging-in partially end of gear teeth midplane.When forward, reversing drive, the instantaneous contact line of the worm gear gear teeth two lateral tooth flanks lays respectively at the both sides on its middle plane.If worm gear is made split type, promptly be split into two-part along the worm gear midplane, when two-part interlace when rotating, just can change the backlash between the adjacent flank of tooth of worm and worm wheel or the wearing and tearing attenuate amount of the compensation worm gear flank of tooth.The deficiency of this transmission is: (1). by the worm screw that the horizontal frontal plane envelope forms, i is slightly little when velocity ratio, and i≤30 o'clock for example, the flank of tooth of worm screw entrance will produce undercut; Thereby be applicable to the transmission occasion that velocity ratio is big, so be of limited application.(2). the two halves worm gear of split type is because structural restriction generally can only lean on curve bath and bolt to compress, and reliability is not as the integrated type worm gear.(3) if worm gear is by the key connecting transmission on the keyway on the wheel hub and the axle, for guarantee wherein half worm gear relatively in addition half worm gear dislocation rotate, the keyway of worm gear don't fail to be widened, this backlash adjustment to transmission is made troubles.
The transmission of helical teeth wildhaber-wormaheel toroid helicoids worm is that the nineteen fifty-one professor of Tokyo polytechnical university helps rattan Shen one invention, and in Japanese Feitian gear Co., Ltd. Development and Production, its product brand is PLANA, and velocity ratio can be less than 30.This transmission is that the inventor is restricted proposition in view of the gear range that the transmission of straight-tooth wildhaber-wormaheel toroid helicoids worm is suitable for.Its worm-gear tooth is the tapered plane tooth, tooth plane, both sides all with the inclination angle oblique of worm gear axis to equate, the inverted cone surfaces of symmetry are tangent fully with the worm gear axis being two of axis respectively; Its worm screw also belongs to planar double enveloping worm, this flank of tooth be tooth plane with the helical teeth wildhaber-wormaheel as generatrix, make the envelope surface that generating motion forms by the meshing relation of worm gear and worm screw.The instantaneous contact line of worm-gear tooth both sides is the antisymmetry distribution when worm gear and worm screw forward, reversing drive, and distribution with the increase at inclination angle from the engaging-in end of being partial to of worm gear gradually transition for relatively nibbling out end, Line of contact distributes and to be partial to engaging-in end when being small inclination, when the inclination angle during greater than certain angle its Line of contact will relatively nibble out end.The backlash that the worm gear of this transmission and worm screw are adjacent can not be adjusted, and also can't compensate the attenuate amount of wheel odontotripsis.
The dual lead cylindrical worm transmission claims " compound mode number worm drive " again, its worm screw is the cylindrical worm that two lateral tooth flank moduluses differ in size, and correspondingly, the helical pitch of its both sides helicoid does not wait yet, because the accumulation of helical pitch difference makes the transverse tooth thickness of worm screw gradually change along its axis; Worm gear is processed by corresponding compound mode number worm gear hob.Adjust its worm screw axial position, can adjust the attenuate amount of the backlash or the compensation wheel odontotripsis of transmission.This transmission by domestic and international application in the precision indexing mechanism of gear hobbing machine etc.The main deficiency of this transmission is: (1). the compound mode number hobbing cutter spade milling difficulty of machining worm wheel, worm gear can not grindings, accurate manufacture cost height.(2). the backlash that adjacent teeth is right during the worm and gear engagement driving is unequal, can not guarantee that the backlash of every pair of tooth all meets required precision.(3). worm gear is few with the tooth logarithm that worm screw contacts simultaneously, and bearing capacity is low, and lack easy to wear, accuracy life, is difficult to the requirement of competent high speed and precision transmission (as high speed gear hobber) or heavy-loaded precision transmission (as cannon, lift machine).
The purpose of this invention is to provide a kind of side gap adjustable, plane enveloped torus worm drive, the attenuate amount that backlash adjacent one another are can be adjusted or the gear teeth are worn when the worm gear of this transmission and worm meshing can compensate, to guarantee the orthodont side clearance of transmission, satisfy the requirement that engineering is heavy to the worm drive load, precision is high, the backlash amount is little.
Concrete scheme of the present invention is: comprise worm gear, worm screw, it is characterized in that: the flank of tooth of worm gear is the plane, and worm-gear tooth axially is wedge shape along it; Worm screw two lateral tooth flanks be respectively with the respective side tooth plane of these wildhaber-wormaheel gear teeth as generatrix, make the envelope surface that generating motion forms by the meshing relation of worm gear and worm screw.
The present invention compared with prior art has following advantage:
1. this transmission has kept the advantage of prior art planar double enveloping worm transmission, but all grindings of worm gear, worm screw are easy to accurate the manufacturing, and the tooth logarithm ratio cylindrical worm gearing transmission that worm and gear contacts simultaneously is many; Its bearing capacity and meshing characteristic are all good than dual lead cylindrical worm transmission.
2. this transmission can be adjusted backlash or compensate the attenuate amount that worm-gear tooth is worn by the axial position that changes worm gear.It also can be used as precision drive except the characteristics with helical teeth wildhaber-wormaheel toroid helicoids worm Transmission bearing, applicable situation is wider than the transmission of helical teeth wildhaber-wormaheel toroid helicoids worm.
3. the worm gear of this transmission is the integrated type worm gear, does not have the existing defective of split type worm gear.The reliability height, and backlash is easy to adjust.
4. the worm-gear tooth plane of this transmission is not limited to horizontal frontal plane, and suitable gear range is bigger than the transmission of straight-tooth wildhaber-wormaheel toroid helicoids worm.
The present invention is further described below in conjunction with accompanying drawing:
Fig. 1 is that worm gear 1 flank of tooth forms schematic diagram among the present invention;
Fig. 2 is that worm screw 2 flank of tooth form schematic diagram among the present invention;
Fig. 3 is the plan view of Fig. 1;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is overall structure figure of the present invention, i.e. worm and gear engagement figure;
Fig. 6 is the left view of Fig. 5, also is that the present invention is by adjusting the axial position of worm gear, a kind of situation of the reduction in tooth thickness of the backlash of adjacent teeth side or compensation wheel odontotripsis when changing transmission.
Fig. 7 is a transmission Line of contact distribution map of the present invention, and wherein fine line is represented forward transmission Line of contact, and dotted line is represented the reversing drive Line of contact.
By above-mentioned accompanying drawing as can be known: the present invention is made up of worm gear 1 and worm screw 2; Structure characteristic of the present invention is: the flank of tooth of worm gear 1 is the plane, and worm-gear tooth axially is wedge shape along it; 2 liang of lateral tooth flanks of worm screw be respectively with the respective side tooth plane of these wildhaber-wormaheel 1 gear teeth as generatrix, make the envelope surface that generating motion forms by worm gear 1 and the meshing relation of worm screw 2.The tooth plane, both sides of the gear teeth of worm gear 1 is the unequal (β in inclination angle of its axis relatively
1≠ β
2).
Transmission of the present invention is made up of a worm gear 1 and a toroid helicoids worm 2, and Fig. 5 is that their position concerns schematic representation.Wherein the gear teeth two lateral tooth flanks of worm gear 1 all are the planes, but the unequal (β in inclination angle of their relative worm gear axis
1≠ β
2), tangent with two inverted cone surfaces that with the worm gear axis are center line respectively, the end circular diameter of two back tapers on the worm gear central plane can equate also can be unequal, as shown in Figure 1.2 liang of lateral tooth flanks of worm screw be respectively with the respective side tooth plane of these wildhaber-wormaheel gear teeth as generatrix, make the envelope surface that generating motion forms by the meshing relation of worm gear and worm screw, as shown in Figure 2.With regard to lateral tooth flank idol engagement driving, this transmission and the transmission of aforementioned existing wildhaber-wormaheel toroid helicoids worm are just the same, and the inclination angle size on gear teeth plane is also consistent with the rule of the instantaneous contact line of worm screw to worm gear; But when forward and reverse transmission, according to the theory of engagement analysis of this transmission, after transmission parameter is determined, the inclination angle, tooth plane, both sides of worm-gear tooth respectively less than with greater than angle beta
1, β
2The time, the instantaneous contact line of worm gear and worm screw forward, reversing drive will lay respectively at the end that the gear teeth are partial in worm gear gear teeth both sides, as shown in Figure 7.Because the worm gear flank of tooth of this transmission is the plane, and worm-gear tooth axially is wedge shape along it, therefore, can be by the axial position adjustment (as shown in Figure 6) of worm gear, the reduction in tooth thickness of the backlash of adjacent teeth side or compensation wheel odontotripsis when changing transmission, thereby guarantee the orthodont side clearance of transmission, satisfy the requirement that engineering is heavy to the worm drive load, precision is high, the backlash amount is little.
Claims (2)
1. side gap adjustable, plane enveloped torus worm drive comprises worm gear (1), worm screw (2), and it is characterized in that: the flank of tooth of worm gear (1) is the plane, and worm-gear tooth axially is wedge shape along it; Worm screw (2) two lateral tooth flanks be respectively with the respective side tooth plane of this wildhaber-wormaheel (1) gear teeth as generatrix, make the envelope surface that generating motion forms by worm gear (1) and the meshing relation of worm screw (2).
2. side gap adjustable, plane enveloped torus worm drive according to claim 1 is characterized in that: the tooth plane, both sides of the gear teeth of worm gear (1) is the unequal (β in inclination angle of its axis relatively
1≠ β
2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117383A CN1105840C (en) | 1999-11-24 | 1999-11-24 | Side gap adjustable, plane enveloped torus worm drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117383A CN1105840C (en) | 1999-11-24 | 1999-11-24 | Side gap adjustable, plane enveloped torus worm drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1257974A true CN1257974A (en) | 2000-06-28 |
| CN1105840C CN1105840C (en) | 2003-04-16 |
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ID=5280013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99117383A Expired - Fee Related CN1105840C (en) | 1999-11-24 | 1999-11-24 | Side gap adjustable, plane enveloped torus worm drive |
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| Country | Link |
|---|---|
| CN (1) | CN1105840C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883679A (en) * | 2013-01-24 | 2014-06-25 | 洛阳凯环精密机械有限公司 | Planar double enveloping worm drive capable of maintaining precision after wear of worm gear teeth |
| CN104675926A (en) * | 2013-12-02 | 2015-06-03 | 洛阳世必爱特种轴承有限公司 | globoid worm gear transmission pair |
| CN103742601B (en) * | 2014-01-10 | 2017-01-18 | 西华大学 | Precise and heavy-load type involute beveloid gear-enveloping hourglass worm transmission |
| CN111536218A (en) * | 2020-05-15 | 2020-08-14 | 重庆大学 | Point-line evolvable enveloping worm transmission pair and working mode thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050504U (en) * | 1989-01-26 | 1990-01-03 | 齐锋 | Cylindrical gear worm pair of varying tooth thickness |
-
1999
- 1999-11-24 CN CN99117383A patent/CN1105840C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883679A (en) * | 2013-01-24 | 2014-06-25 | 洛阳凯环精密机械有限公司 | Planar double enveloping worm drive capable of maintaining precision after wear of worm gear teeth |
| CN103883679B (en) * | 2013-01-24 | 2016-07-06 | 洛阳凯环精密机械有限公司 | The Property of Plane-enveloped Worm Transmission of precision can be kept after worm gear teeth abrasion |
| CN104675926A (en) * | 2013-12-02 | 2015-06-03 | 洛阳世必爱特种轴承有限公司 | globoid worm gear transmission pair |
| CN103742601B (en) * | 2014-01-10 | 2017-01-18 | 西华大学 | Precise and heavy-load type involute beveloid gear-enveloping hourglass worm transmission |
| CN111536218A (en) * | 2020-05-15 | 2020-08-14 | 重庆大学 | Point-line evolvable enveloping worm transmission pair and working mode thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1105840C (en) | 2003-04-16 |
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Granted publication date: 20030416 Termination date: 20151124 |
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