CN100334370C - Rotation and torsional vibration compound movement mechanism based on planetary drive with small teeth difference - Google Patents
Rotation and torsional vibration compound movement mechanism based on planetary drive with small teeth difference Download PDFInfo
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- CN100334370C CN100334370C CNB2004100735235A CN200410073523A CN100334370C CN 100334370 C CN100334370 C CN 100334370C CN B2004100735235 A CNB2004100735235 A CN B2004100735235A CN 200410073523 A CN200410073523 A CN 200410073523A CN 100334370 C CN100334370 C CN 100334370C
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Abstract
The present invention discloses a transmission mechanism based on few teeth difference transmission, which realizes the compound motion of rotation and torsional vibration. An eccentric shaft connected with a power source can realize motion input; a motion conversion mechanism is composed of an external gear which is freely sheathed with the eccentric shaft and an internal gear which is engaged with the external gear; a motion output mechanism is composed of a shifting fork pin which is fixed with the external gear and a compound motion output element which is spliced with the shifting fork pin, and the compound motion output element is provided with a shifting fork slot. The shifting fork pin and the compound motion output element can realize the compound motion of the external teeth into the compound motion of rotation and torsional vibration, and the compound motion is output by the shifting fork pin and the compound motion output element. The shifting fork pin and the compound motion output element can realize that the compound motion of the external teeth into the compound motion of rotation and torsional vibration, and the compound motion is output by the shifting fork pin and the compound motion output element. Compared with the existing transmission schemes, the mechanism greatly simplifies structures, has wider movement parameter matching range and can be widely used in the technical fields of vibration tapping, vibration drilling, vibration grinding and other mechanical processing.
Description
Technical field
The invention belongs to mechanics drive technology field, relate to the driving mechanism that the few tooth difference transmission principle of a kind of usefulness is realized rotation and torsional oscillation compound motion.
Background technique
At present, in the mechanics in field of mechanical technique, realize that rotation and torsional vibration composite methods are broadly divided into three kinds.
(1) single power source mechanical motion combination mechanism: this compound motion implementation method utilization single power source, by two kinematic chains one is rotatablely moved and to be divided into two branch roads, realize low speed rotation and high speed rotary motion that compound motion is required respectively, then by a motion combination mechanism, two motions are synthesized low speed revolution and the compound forms of motion of high speed rotation, by an eccentric sheave output mechanism, compound motion is changed into low speed rotation and the compound forms of motion output of high frequency torsional vibration at last.In the prior art before the present invention, a kind of triangular cam spindle box of CN85104259 patent disclosure promptly adopts this transmission scheme.
(2) planetary transmission campaign combination mechanism: this compound motion implementation method is used the principle of planetary transmission, directly single rotatablely moving is converted into the low speed revolution and the high speed rotation compound motion of planet wheel, by an eccentric sheave output mechanism, compound motion is changed into low speed rotation and the compound forms of motion output of high frequency torsional vibration then.In the prior art before the present invention, the vibrating and tapping annex that the India scholar announces promptly adopts this mechanism [lternational JournalMachine tools Manufacture 1987.27. (3): 343-340].
(3) dual power source mechanical motion combination mechanism: this compound motion implementation method adopts two separate Transmitted chainss of two drive power source, realize low speed rotation and high speed rotary motion that compound motion is required respectively, then by a motion combination mechanism, two rotatablely moved synthesizes low speed revolution and the compound forms of motion of high speed rotation, by an eccentric sheave output mechanism compound motion is changed into low speed rotation and the compound motion of high frequency torsional vibration at last.In the prior art before the present invention, a kind of brill and hinge headstock that shakes that adopts two cover rotating shaft train drive paths of CN86106470 patent disclosure.
Above-mentioned three kinds of rotations and torsional-vibration composite-motion implementation method characteristics and deficiency separately are respectively: single action power and double dynamical transmission principle are similar substantially, all realize required low speed rotation and high speed rotary motion respectively by two Transmitted chainss, and then two motions are synthesized, realize the output of rotation and torsional-vibration composite-motion at last by output mechanism, the characteristics of these two kinds of methods are to realize the compound motion of large speed ratio, be the synthetic of low speed revolution and high frequency torsional oscillation, and speed ratio can conveniently be realized adjusting, shortcoming is the transmission chain length, complex structure, volume is big, and combination mechanism assembling and manufacturing structure manufacturability are poor; The planetary motion combination mechanism has omitted two Transmitted chainss and combination mechanism, directly rotation and revolution are synthesized on the planet wheel by Gear Planet Transmission, structural complexity is simplified greatly, but the low speed revolution is very limited with the speed ratio of high frequency torsional oscillation, and therefore this mechanism uses less aborning.Also there are many problems in rotation and torsional-vibration composite-motion aspect mechanism's realization as can be seen, thereby the feasible advanced persons' such as vibrating and tapping, fraising, drilling and grinding of this motion the vibrocutting technology that needs is difficult to effectively be applied aborning.
Summary of the invention
At the problem that exists in above-mentioned rotation and the torsional oscillation compound motion implementation procedure, the object of the present invention is to provide a kind of transmission simple, compact structure, the number of components is few, be easy to realize the low speed revolution and high frequency torsional oscillation of large speed ratio, and amplitude is easy to adjust, realizes the driving mechanism of rotation and torsional oscillation compound motion with few tooth difference transmission.
Now design of the present invention and technical solution are described below:
The present invention adopts transmission principle that few tooth difference transmission realizes rotation and torsional oscillation compound motion as shown in Figure 1, it is characterized in that: by eccentric shaft 1, with the external gear 2 of eccentric shaft 1 empty cover, with the internal gear 3 of external gear 2 engagements, connect firmly together shifting fork pin 4, constitute with the compound motion output element 5 of shifting fork pin 4 sliding band fork slots of joining with external gear 2.Eccentric shaft 1, internal gear 3, external gear 2 constitute few tooth difference transmission of standard.Shifting fork pin 4, the compound motion output element 5 of band fork slot has constituted the output mechanism of rotation and torsional oscillation compound motion, shifting fork pin 4 connects firmly with external gear 2 and is integral, the movement locus of any is identical arbitrarily on its motion and the external gear 2, assembly relation between the compound motion output element 5 of shifting fork pin 4 and band fork slot as depicted in figs. 1 and 2, the low speed revolution of shifting fork pin 4 is directly output as the low speed rotation of the compound motion output element 5 of band fork slot, the high speed rotating plane motion of shifting fork pin 4 can be resolved into radially the vibration with tangential two Vertical direction as shown in Figure 2, wherein radial vibration is released, do not produce output, and tangential vibrations is converted into the torsional vibration of the compound motion output element 5 of band fork slot.Thereby obtained the rotation and the torsional oscillation compound motion that need on the compound motion output element 5 of band fork slot, the pass between this compound motion and the input motion is:
(1) the low-speed rotation rotation speed n is:
Wherein: i is few tooth difference reduction speed ratio; n
InputRotating speed for eccentric shaft 1; n
OutputRotating speed for compound motion output element 5.
(2) torsional frequency f is:
(3) torsional vibration angular amplitude θ is:
Wherein: e
1Be inside and outside Gear center distance, e
2Be distance between shifting fork pin and the input output shaft centre line.
The present invention has following several big outstanding advantage compared with prior art:
(1) greatly simplified in the transmission, the entire mechanism compact structure, number of components and weight only are about 1/5th of existing mechanism, assembling and manufacturing structure manufacturability are greatly improved.
(2) low speed of realizing large speed ratio easily turns round and the high frequency torsional oscillation the fine requirement of satisfying the vibrocutting technology.
(3) adjustment of the existing angular amplitude θ of torsional oscillation mechanism can only realize by the eccentric shift fork of changing different offsets, and torsional oscillation of the present invention mechanism is by changing the position e of shifting fork pin
2, be easy to realize the adjustment of torsional vibration angular amplitude θ.
(4) the present invention can be widely used in vibrating and tapping, fraising, vibration drilling, vibration grinding and other engineering fields.
Description of drawings:
Fig. 1: rotation and torsional oscillation compound motion transmission principle schematic representation
Fig. 2: low speed revolution and high speed rotating plane motion are converted into rotation and torsional oscillation compound motion track schematic representation
Fig. 3: one of embodiment of the invention vibrating and tapping and fraising lathe scheme schematic representation
Fig. 4: two vibration grinding lathe scheme schematic representation of the embodiment of the invention
Wherein:
Fig. 1 is rotation of the present invention and torsional oscillation compound motion transmission principle figure schematic representation, in this structure provided by the invention, only need 5 basic building blocks can realize rotation and torsional oscillation compound motion, existing eccentric shaft 1, the external gear 2 that joins with eccentric shaft 1, with the internal gear 3 of external gear 2 engagements, connect firmly together shifting fork pin 4 with external gear 2, constitute with the compound motion output element 5 of shifting fork pin 4 sliding band fork slots of joining and rotate and torsional oscillation compound motion driving mechanisms.When eccentric shaft 1 input speed is the high speed rotary motion of n (rpm), it is that low speed revolution and the rotating speed of n/i (rpm) is that n (rpm), the turning radius are e that the few tooth difference transmission mechanism that constitutes by inside and outside gear 3,2 converts it into rotating speed
1The high speed rotating plane motion, and two motions are compounded on the external gear 2 simultaneously.Like this, on the external gear 2 arbitrarily the motion of any just show as the low speed revolution movement locus mutually compound with the high speed rotating plane motion, as shown in Figure 2, so far just possessed and realized rotating and the required primary condition of torsional oscillation compound motion.
The compound motion track of Fig. 2 for a bit being had arbitrarily on the external gear 2 in the mechanism of the present invention, and rotation and torsional oscillation compound motion output principle.
Fig. 3 is used for the desktop computer conceptual scheme of vibrating and tapping and fraising for mechanism of the present invention, and wherein: 6 lathe power source AC motor, 7 adopt mechanism of the present invention to realize the vibrating spindle case of rotation and torsional oscillation, 8 desktop computer columns, 9 desktop computer worktable.
Fig. 4 is used for the external cylindrical grinding machine fundamental diagram of vibration grinding technology for mechanism of the present invention, and wherein: 10 usefulness mechanism of the present invention realizes the rotation and the torsional oscillation vibrating bin of compound motion, 11 dials, 12 emery wheels, 13 workpiece, 14 tailstocks.
Embodiment:
Now in conjunction with the accompanying drawings the specific embodiment of the invention is described further:
Embodiment 1: the headstock structure that mechanism of the present invention is used for vibrating and tapping and fraising desktop computer.
Referring to Fig. 3: common tapping and fraising technology are that screw tap or the reamer that is installed on the main shaft only carries out the low speed rotation motion, and cutting speed is low, and cutting torque is big in the course of working, and cutter life is short, the cutting fluid lubrication weak effect, attack the system screw thread and the precision that reams lower.Vibrating and tapping and fraising are on the basis of traditional tapping and reaming method, apply torsional vibration clocklike for artificially screw tap or reamer, form pulsed and be interrupted cutting, thereby improve screw tap or the instantaneous cutting speed of reamer, make screw tap or reamer pressing machined surface repeatedly in the process of reciprocal advance and retreat, reduce cutting force, improve the cutting fluid lubrication effect, improve machined surface quality.The rotation and the torsional oscillation composite-motion mechanism that the present invention is based on the transmission of few tooth difference are on the basis of common desktop computer, rotation of the present invention and torsional oscillation composite-motion mechanism are applied to machine tool chief axis box part 7, other parts such as power source 6, column 8 and worktable 9 are not done any change, can make main shaft obtain rotation and torsional oscillation compound motion, thereby realize vibrating and tapping and fraising function.
Embodiment 2: the special device structure that mechanism of the present invention is used for vibration grinding technology
Referring to Fig. 4: 10 in normal cylindrical grinding spindle case provides the low speed rotation motion, the workpiece 13 that is installed between headstock 10 and the tailstock 14 can only carry out the low speed revolution under the effect of dial 11, the emery wheel 12 of high speed rotating is finished the grinding operation, because workpiece 13 ceaselessly rotates and does length feed with worktable, all the time there is bigger specific pressure between emery wheel 12 and the workpiece 13, the grinding temperature height, the workpiece of easily burning, grinding efficiency is low.The present invention was by adding the unidirectional rotation motion of plain external grinding machine headstock the compound motion of torsional oscillation for rotation, can form new vibration grinding method, it is little that this method has a grinding force, can prevent advantages such as burn, rotation provided by the invention and torsional oscillation composite-motion mechanism are applied to normal cylindrical mill spindle box part 10, can make workpiece 13 obtain rotation and torsional oscillation compound motion, realize vibration grinding operation efficiently.
Claims (3)
1, a kind ofly realize the driving mechanism of rotation and torsional oscillation compound motion having motion input, conversion, output mechanism based on few tooth difference transmission, it is characterized in that: the motion input mechanism is by realizing with the power source eccentric shaft (1) that joins; Movement conversion mechanism is by with the external gear (2) of the empty cover of eccentric shaft (1), realize with the internal gear (3) of external gear engagement; The motion output mechanism is realized by the compound motion output element (5) of the band fork slot that connects firmly together shifting fork pin (4) with external gear (2), pegs graft with shifting fork pin (4).
2, according to claim 1ly a kind ofly realize it is characterized in that the driving mechanism of rotation and torsional oscillation compound motion based on few tooth difference transmission: it is that n/i, unit are that low speed revolution and the rotating speed of rpm is that n, unit are that rpm, the turning radius are e that few tooth difference transmission that inside and outside gear (3,2) constitutes changes into rotating speed with high speed rotary motion
1The mutually compound movement locus of high speed rotating plane motion,
Wherein, n is the rotating speed of input eccentric shaft (1), and i is few tooth difference reduction speed ratio, e
1Centre distance for inside and outside gear (3,2).
3, a kind of driving mechanism based on few tooth difference transmission realization rotation and torsional oscillation compound motion according to claim 1 is characterized in that: realized converting low speed revolution and high speed rotating plane motion to rotation and torsional-vibration composite-motion by shifting fork pin (4) and compound motion output element (5):
Wherein, the torsional frequency f that is converted into is:
The angular amplitude θ that is converted into torsional vibration is:
In the formula: n is input as the rotating speed of eccentric shaft (1); e
1Be the centre distance of inside and outside gear (3,2), e
2Be distance between shifting fork pin (4) and the input output shaft centre line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100735235A CN100334370C (en) | 2004-12-29 | 2004-12-29 | Rotation and torsional vibration compound movement mechanism based on planetary drive with small teeth difference |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100735235A CN100334370C (en) | 2004-12-29 | 2004-12-29 | Rotation and torsional vibration compound movement mechanism based on planetary drive with small teeth difference |
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| CN1632347A CN1632347A (en) | 2005-06-29 |
| CN100334370C true CN100334370C (en) | 2007-08-29 |
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| CNB2004100735235A Expired - Fee Related CN100334370C (en) | 2004-12-29 | 2004-12-29 | Rotation and torsional vibration compound movement mechanism based on planetary drive with small teeth difference |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633064B (en) * | 2009-08-12 | 2011-01-05 | 北京航空航天大学 | High-low frequency compound torsional vibration tapping device |
| CN104919919A (en) * | 2015-03-06 | 2015-09-23 | 李阳铭 | Vibration type crushing and ridging box |
| JP2017209738A (en) * | 2016-05-23 | 2017-11-30 | リョービ株式会社 | Motor-driven polishing device |
| CN114570965B (en) * | 2022-03-23 | 2023-07-25 | 河北工业职业技术学院 | Vibration drilling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104259A (en) * | 1985-05-30 | 1986-12-03 | 国营惠丰机械厂 | Spindle box |
| CN86106470A (en) * | 1986-09-24 | 1987-05-06 | 国营惠丰机械厂 | Bore and the hinge main spindle box that shakes |
| US5123882A (en) * | 1991-10-10 | 1992-06-23 | Trogetec, Inc. | Compound planocentric cycloidal gear drives with orthogonal planet arrangements |
| CN1166396A (en) * | 1996-05-23 | 1997-12-03 | 中国人民解放军国防科学技术大学 | Spherical involute gear transmission mechanism |
| JP2000205350A (en) * | 1999-01-12 | 2000-07-25 | Nagahito Matsuda | Composite rotary drive device |
-
2004
- 2004-12-29 CN CNB2004100735235A patent/CN100334370C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104259A (en) * | 1985-05-30 | 1986-12-03 | 国营惠丰机械厂 | Spindle box |
| CN86106470A (en) * | 1986-09-24 | 1987-05-06 | 国营惠丰机械厂 | Bore and the hinge main spindle box that shakes |
| US5123882A (en) * | 1991-10-10 | 1992-06-23 | Trogetec, Inc. | Compound planocentric cycloidal gear drives with orthogonal planet arrangements |
| CN1166396A (en) * | 1996-05-23 | 1997-12-03 | 中国人民解放军国防科学技术大学 | Spherical involute gear transmission mechanism |
| JP2000205350A (en) * | 1999-01-12 | 2000-07-25 | Nagahito Matsuda | Composite rotary drive device |
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