CN202628946U - Worm rod transmission device capable of removing tooth lateral gap - Google Patents
Worm rod transmission device capable of removing tooth lateral gap Download PDFInfo
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- CN202628946U CN202628946U CN 201220297123 CN201220297123U CN202628946U CN 202628946 U CN202628946 U CN 202628946U CN 201220297123 CN201220297123 CN 201220297123 CN 201220297123 U CN201220297123 U CN 201220297123U CN 202628946 U CN202628946 U CN 202628946U
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- worm
- worm screw
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- worm rod
- tooth
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Abstract
The utility model provides a worm rod transmission device capable of removing a tooth lateral gap. Not only can the tooth lateral gap be reduced or removed, and the precise transmission is realized, but also the worm rod transmission device has the advantages of large bearing capability and convenience in machining and manufacturing. The worm rod transmission device comprises a worm rod (10) and a worm gear (20); the worm rod (10) consists of a left worm rod (11) and a right worm rod (12), which are coaxially mounted; each one of the left tooth face and the right tooth face of the worm rod (10) is formed by primary enveloping of a shaped face of a sine linear sand gear; sine-shaped gear teeth are radially and uniformly distributed on the worm gear (20); each gear tooth is formed by secondary enveloping of a hob consistent to the worm rod in shape; and an adjusting mechanism for adjusting a relative position and a relative rotation angle is arranged between the left worm rod (11) and the right worm rod (12).
Description
Technical field
The utility model belongs to worm gears, particularly a kind of transmission device of eliminating backlash.
Background technique
In gear transmission, suitable backlash is one of necessary condition of driving mechanism proper functioning.The existence of sideshake can be avoided tooth force distortion and frictional heating and expand caused extruding or stuck phenomenon; The error of making and assembling can be compensated to a certain extent, thereby the manufacturing process of less expensive can be adopted; The space that holds lubricant oil can be provided, and it is lubricated etc. to be convenient to the flank of tooth.But, because the existence of backlash brings impact, vibration, noise, reduction system servo-actuated precision and stability etc. must for modern Mechatronic Systems such as industrial robot, numerical control machine tool, printing equipment, automatic gun and radar etc.Obviously, in order to improve the gear transmission that needs frequent clockwise and anticlockwise in the transmission accuracy of transmission, the especially servo drive system, backlash is suitable little, is preferably zero on the one hand; For the ease of making and installing, improve the bearing capacity of transmission on the other hand, backlash is suitable big.In accurate heavy load transmission, the contradiction between the two is very outstanding.Therefore, research and develop out a kind of can simultaneous adaptation the anti backlash gear transmission device that requires of highi degree of accuracy, big load have the important engineering meaning.
At present, the worm drive that has proposed has multiple pattern, but with regard to there not being the adjustable worm drive of sideshake and backlash following five kinds of driving types is arranged:
The dual lead cylindrical worm transmission (Qian Guangjin. the 5th phase of new technology new process .1983.The dual lead cylindrical worm transmission is the backlash of adjusting transmission through the axial position of adjustment worm screw the attenuate amount with compensation wheel odontotripsis, this transmission by domestic and international application in the precision indexing mechanism of gear hobbing machine etc.Its main deficiency is, the compound mode number hobbing cutter spade milling of machining worm wheel and the accurate difficulty of making, and worm gear is few with the number of teeth that the worm meshing transmission contacts simultaneously; Bearing capacity is low; Easy to wear, accuracy life is short, is difficult to satisfy the requirement of high speed and precision transmission or heavy-loaded precision transmission.
The transmission of horizontal frontal plane first enveloped toroid helicoids worm (Buckingham. Wilder is breathed out and is foretold (Wildharber). worm drive. the worm drive collected works. University Of Chongqing's worm drive scientific research group is translated volume, 1976.7.).The contact area of the worm-gear tooth bi-side of horizontal frontal plane first enveloped toroid helicoids worm transmission becomes antisymmetry to distribute; So when with it when face width of tooth central plane subdivision is made; Through relatively rotating two half worm gears; Just can reach the purpose of adjustment or compensation backlash, be applicable to and make the precision indexing worm drive.Its main deficiency is, the worm screw that (1) is formed by the horizontal frontal plane envelope, when velocity ratio slightly hour, the flank of tooth of worm screw entry end will produce undercut; (2) cause in crack because dislocation disappears, two half worm gear respectively with worm screw about two flank of tooth contact simultaneously, the relative sliding velocity between the worm drive flank of tooth is bigger, so cause flank of tooth easy abrasion, transmission efficiency is low; (3) if adopt key connecting worm gear and axle, for guaranteeing wherein half worm gear half worm gear dislocation transmission relatively in addition, don't fail to the keyway of worm gear be widened with dislocation, this makes troubles for the sideshake adjustment of transmission.
Side gap adjustable becomes the transmission of transverse tooth thickness wildhaber-wormaheel toroid helicoids worm; The axial position that becomes the transverse tooth thickness worm gear through adjustment is the backlash of can regulate worm gear and worm screw; Total number of teeth in engagement is many; Big its worm screw of bearing capacity can quench and adopt the flat-faced wheel grinding, be easy to precision machining, but some shortcomings are also arranged in this transmission such as gear tooth friction is big, serious wear, efficient is on the low side etc., its realization only be that sideshake after the transmission wearing and tearing is adjusted.
The two roller double enveloping worm transmissions of no sideshake.It is a kind of new drive device; This transmission utilizes the arranged in dislocation of two halves worm gear wheel body to eliminate backlash; The sideshake problem in the worm drive can be effectively eliminated in this transmission engagement, but this transmission also has some shortcomings, as higher to the requirement on machining accuracy of two halves worm gear; Bearing capacity is not strong, and stuck phenomenon etc. takes place easily.
In addition, for realizing no sideshake transmission, some scientific workers have also proposed such as twin worm transmission (Cao Xijing; Zhang Chun, Liu Changqi, Li Ning. the application [J] of twin worm transmission in the accurate digital control calibration. Shaanxi Tech Univ's journal; 2003,21 (1): 70-72), can reduce drive gap the twin worm driving mechanism (Qiu Xinqiao. machine-building, 2003; 41 (7): 51-51.), diclinic gear structure (Guo Xinglong; Wang Gang, Li Kai. eliminate several kinds of structures [J] in transmission gap. the mechanical engineer, 2002.10:64-65) with the spur gear wheel train structure etc.To little sideshake that in the engineering field gear transmission is proposed and no sideshake requirement, the scientific worker has carried out some correlative studys both at home and abroad, and discloses the patent of some no sideshakes and the adjustable gear drive of backlash.Like number of patent application is that 200610102244.6 " backlash device for use in transmission of precise gear worm ", number of patent application are that 200510050421.6 " a kind of worm gearing ", the patent No. are ZL99117383.X " side gap adjustable, plane enveloped torus worm drive "; Though these transmission devices can be eliminated backlash; But its transmission component is many, volume big, complex structure, is difficult to be applicable to the transmission device that requires the servo drive system that transmission accuracy is high, bearing capacity is big, mechanism is compact.
The model utility content
The utility model technical problem to be solved provides a kind of worm gears of eliminating backlash, and it can not only reduce or eliminate backlash, realize precision drive, and bearing capacity is big, and is convenient to manufacturing.
It is following that the utility model solves the technological scheme that its technical problem adopted:
A kind of worm gears of eliminating backlash of the utility model comprises worm and worm wheel, it is characterized in that: said worm screw is made up of coaxial mounted left side section worm screw, right section worm screw, and its left and right sides flank of tooth is formed by sinusoidal shape emery wheel antarafacial first enveloped respectively; Said worm gear radially is being evenly distributed with the sinusoidal shape gear teeth, and the gear teeth are formed by the hobboing cutter twice-enveloping consistent with the worm screw shape; Be provided with the controlling mechanism of its relative position of adjustment and relative rotation angle between said left side section worm screw, the right section worm screw.
In technique scheme, the said worm gear gear teeth are shaped as a kind of in sine, cosine, tangent or the cotangent antarafacial curve.
The beneficial effect of the utility model is, but worm gear, all grindings of worm screw is easy to accurate the manufacturing, and the tooth logarithm ratio cylindrical worm that worm and gear contacts simultaneously is many, and bearing capacity is big; Can come to eliminate fully sideshake through the angle of swing of adjusting two sections worm screws, even behind tooth surface abrasion, also can eliminate sideshake through the angle of swing of adjusting two sections worm screws; Worm gear tooth surface and worm tooth-surface engagement, the worm gear tooth surface is formed by the hobboing cutter twice-enveloping identical with worm tooth-surface, therefore has advantages such as noise is little, transmission efficiency is high, heating value is low, friction power loss is little; Form dynamic pressure oil film easily, so difficult spot corrosion, the scuffing failure of taking place of this transmission, bearing capacity is big.
The utility model provides a kind of precision drive and powerdriven novel worm gears of combining, and can be used in precision indexing, precision drive and accurate power transmission.
Description of drawings
This specification comprises following five width of cloth accompanying drawings:
Fig. 1 is the stereogram that the utility model can be eliminated the worm gears of backlash;
Fig. 2 is the structural representation that the utility model can be eliminated the worm gears of backlash;
Fig. 3 is the structural representation that the utility model can be eliminated section worm screw in a left side in the worm gears of backlash;
Fig. 4 is the structural representation that the utility model can be eliminated the worm gears right-of-center in political views section worm screw of backlash;
Fig. 5 is the formation schematic diagram that the utility model can be eliminated the worm gears worm tooth-surface of backlash.
Component, toponym and pairing mark among the figure: worm screw 10, left side section worm screw 11, right section worm screw 12, worm shaft 13, swelling cover stud component 14, pressure spring 15, worm gear 20, worm blank 30, cutter 31.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
See figures.1.and.2; A kind of worm gears of eliminating backlash of the utility model; Comprise worm screw 10 and worm gear 20; It is characterized in that: said worm screw 10 is made up of coaxial mounted left side section worm screw 11, right section worm screw 12, and its left and right sides flank of tooth is formed by sinusoidal shape emery wheel antarafacial first enveloped respectively; Said worm gear 20 radially is being evenly distributed with the sinusoidal shape gear teeth, and the gear teeth are formed by the hobboing cutter twice-enveloping consistent with the worm screw shape; Be provided with the controlling mechanism of its relative position of adjustment and relative rotation angle between said left side section worm screw 11, the right section worm screw 12.Worm screw 10 is arranged through adjustment left side section worm screw 11, the dislocation of right section worm screw 12 angle of swing; Its left flank and the engagement of worm gear 20 gear teeth right flanks; The worm screw right flank is meshed with worm gear 20 gear teeth left flanks, remains the flank engagement with left side section worm screw 11, right section worm screw 12 at worm screw 10 throat's worm gears 20 gear teeth.Through controlling mechanism adjustment left side section worm screw 11, right section worm screw 12 relative positions and relative rotation angle; Worm gear 20 gear teeth are remained with worm screw 10 left and right sides flank of tooth contact, thereby realize no sideshake transmission, not only guarantee the proper functioning of transmission and good lubricating; And through adopting two section worm screw combination dislocation to arrange; Eliminate the hysterisis error of transmission, made stable drive, improved transmission accuracy.
It is as shown in Figure 5 that the flank of tooth that the utility model can be eliminated the worm gears worm screw 10 of backlash forms principle.The right flank of left side section worm screw 11 blanks is to be formed by the roller envelope.Left side section worm screw 11 blanks are with angular velocity omega
1Around self axis rotation, sinusoidal shape cutter 31 is with angular velocity omega
2Simultaneously do rotation again around the rotation of worm gear axis, and ω
1With ω
2Ratio be constant, be that helicoid that instrument generatrix envelope forms is exactly the right flank of left side section worm screw 11 with cylinder cutter 31 like this.The flank of tooth shaping principle of right section worm screw 12 is roughly the same with the shaping principle of left side section worm screw 11 flank of tooth, and the flank of tooth that its difference is right section worm screw 12 is formed by another section envelope of curve of sinusoidal shape sinusoidal shape cutter 31.
Fig. 2,3 and Fig. 4 show a kind of concrete structure of the utility model, promptly said left side section worm screw 11 is adopted and worm shaft 13 unitary whole structures, a right section worm screw 12 is fixed on the worm shaft 13.Said controlling mechanism comprises and is arranged on left side section worm screw 11, right section worm screw 12 pressure spring 14 circumferentially laid at interval of the edge between the end face in opposite directions, and is arranged on worm shaft 13 and overlaps stud component 13 with the swelling between the right section worm screw 12.Axial distance through pressure spring 14 adjusting left side section worm screws 11, right section worm screw 12 overlaps stud component 13 by swelling and fastens as one.
The utility model with have existing worm gears to compare to have following advantage: the advantage of inheriting existing planar double-enveloping worm transmission; But worm gear, all grindings of worm screw; Be easy to accurate the manufacturing, the tooth logarithm ratio cylindrical worm that worm and gear contacts simultaneously is many, and bearing capacity is big; Adopt two sections worm screws to form, can come to eliminate fully sideshake through the angle of swing of adjusting two sections worm screws, even behind tooth surface abrasion, also can eliminate sideshake through the angle of swing of adjusting two sections worm screws; There is not the engagement of the worm gear tooth surface of employing and worm tooth-surface; The worm gear tooth surface is formed by the hobboing cutter twice-enveloping identical with worm tooth-surface, so this worm gear pair has advantages such as the planar double-enveloping worm noise is little, transmission efficiency is high, heating value is low, friction power loss is little; Characteristics such as the roller sine of worm gears, cosine, tangent, cotangent etc. can produce a kind of of antarafacial curve in the location, the contact of its flank of tooth is for line contacts, and it is many to have a total number of teeth in engagement, and bearing capacity is strong; Form dynamic pressure oil film easily, so difficult spot corrosion, the scuffing failure of taking place of this transmission, bearing capacity is big; Be a kind of combine precision drive and powerdriven novel worm drive, can be used in precision indexing, precision drive and accurate power transmission.
Claims (4)
1. the worm gears that can eliminate backlash; Comprise worm screw (10) and worm gear (20); It is characterized in that: said worm screw (10) is made up of coaxial mounted left side section worm screw (11), right section worm screw (12), and its left and right sides flank of tooth is formed by sinusoidal shape emery wheel antarafacial first enveloped respectively; Said worm gear (20) radially is being evenly distributed with the sinusoidal shape gear teeth, and the gear teeth are formed by the hobboing cutter twice-enveloping consistent with the worm screw shape; Be provided with the controlling mechanism of its relative position of adjustment and relative rotation angle between said left side section worm screw (11), the right section worm screw (12).
2. a kind of worm gears of eliminating backlash as claimed in claim 1 is characterized in that: said worm gear (20) gear teeth are shaped as a kind of in sine, cosine, tangent or the cotangent antarafacial curve.
3. according to claim 1 or claim 2 a kind of worm gears of eliminating backlash, it is characterized in that: a said left side section worm screw (11) is adopted and worm shaft (13) unitary whole structure, and a right section worm screw (12) is fixed on the worm shaft (13).
4. a kind of worm gears of eliminating backlash as claimed in claim 3; It is characterized in that: said controlling mechanism comprises and is arranged on left side section worm screw (11), right section worm screw (12) pressure spring (14) circumferentially laid at interval of the edge between the end face in opposite directions, and is arranged on worm shaft (13) and overlaps stud component (13) with the swelling between the right section worm screw (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297123 CN202628946U (en) | 2012-06-25 | 2012-06-25 | Worm rod transmission device capable of removing tooth lateral gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297123 CN202628946U (en) | 2012-06-25 | 2012-06-25 | Worm rod transmission device capable of removing tooth lateral gap |
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| CN202628946U true CN202628946U (en) | 2012-12-26 |
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| CN 201220297123 Expired - Fee Related CN202628946U (en) | 2012-06-25 | 2012-06-25 | Worm rod transmission device capable of removing tooth lateral gap |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734389A (en) * | 2012-06-25 | 2012-10-17 | 西华大学 | Worm transmission device capable of eliminating gear backlash |
| CN104948668A (en) * | 2015-04-24 | 2015-09-30 | 中国电子科技集团公司第三十八研究所 | Radar antenna transmission gear on basis of planar double-enveloping worm gear pair |
| CN106539230A (en) * | 2016-11-05 | 2017-03-29 | 淄博正邦知识产权企划有限公司 | The spiral umbrella that a kind of Worm Wheel System closes one's umbrella |
| WO2022242684A1 (en) * | 2021-05-18 | 2022-11-24 | 成都理工大学 | Planar double-enveloping toroidal worm gear set and manufacturing method therefor |
-
2012
- 2012-06-25 CN CN 201220297123 patent/CN202628946U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734389A (en) * | 2012-06-25 | 2012-10-17 | 西华大学 | Worm transmission device capable of eliminating gear backlash |
| CN104948668A (en) * | 2015-04-24 | 2015-09-30 | 中国电子科技集团公司第三十八研究所 | Radar antenna transmission gear on basis of planar double-enveloping worm gear pair |
| CN104948668B (en) * | 2015-04-24 | 2017-07-25 | 中国电子科技集团公司第三十八研究所 | Radar antenna transmission device based on Planar Double-Enveloping Toroid Worm Gear |
| CN106539230A (en) * | 2016-11-05 | 2017-03-29 | 淄博正邦知识产权企划有限公司 | The spiral umbrella that a kind of Worm Wheel System closes one's umbrella |
| WO2022242684A1 (en) * | 2021-05-18 | 2022-11-24 | 成都理工大学 | Planar double-enveloping toroidal worm gear set and manufacturing method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140625 |
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| EXPY | Termination of patent right or utility model |