CN86104622A - A kind of rotation becomes straight-line new mechanism - Google Patents
A kind of rotation becomes straight-line new mechanism Download PDFInfo
- Publication number
- CN86104622A CN86104622A CN86104622.6A CN86104622A CN86104622A CN 86104622 A CN86104622 A CN 86104622A CN 86104622 A CN86104622 A CN 86104622A CN 86104622 A CN86104622 A CN 86104622A
- Authority
- CN
- China
- Prior art keywords
- straight
- centering block
- tooth
- bar
- dentulous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 36
- 230000021615 conjugation Effects 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 abstract description 14
- 230000000979 retarding effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 15
- 230000008901 benefit Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Landscapes
- Retarders (AREA)
- Transmission Devices (AREA)
Abstract
A kind of rotation becomes straight-line new mechanism.Take straight sided W dentulous mechanism and the straight-bar dentulous or the chain structure combining of centering block.Purpose is to make this mechanism both possess the bearing behavior of multiple tooth stressed and big retarding ability, and higher mechanical efficiency is arranged again.This mechanism is by the eccentric shaft input torque and drive centering block dentulous in the W mechanism, and the latter is the engagement by the conjugation tooth again.Drive toothed straight-bar or the straight reciprocating motion of chain row culture.This mechanism can be widely used in handling machinery and the press machine.
Description
The invention belongs to a kind of new mechanical transmission.
At present, no matter browse " mechanical design handbook " unite " mechanical design handbook " of writing Beijing 3 times printing in June nineteen eighty-three that group writes, still retrieve the international monopoly document, all can draw: not by any medium, by certain gear ratio, directly become continuous straight line motion by continuous rotation.And the various mechanisms with very big stroke are nothing but following several combinations:
(1) screw rod and nut;
(2) screw rod and tooth bar;
(3) roller and screw rod;
(4) wheel and rack;
(5) wheel and flexible element.
They have his own strong points, and also respectively have shortage, the characteristics of former three transmission to be the continuous slippage or the rolling of helicoid.The peripheral velocity direction of driving link is perpendicular to the straight line movement direction of driven member, their total deceleration force amplifier and small and exquisite advantages of compact structure, but (1), (2) two combinations are because the helicoid sliding rate of load is big, make their transmission efficiency very low, it is comparatively violent to wear and tear; (3) combination adds that accuracy of manufacturing is very high because the helicoid of load and roller roll mutually except that above-mentioned total advantage, thereby also has the high and meticulous advantage of moving of efficient concurrently.But thing followed fragile structure, technology capability difference and price are more expensive, then are its inevitable shortcomings; (4), the transport characteristics of (5) two kinds of combinations is that the peripheral velocity of driving wheel cylindrical (or pitch circle of driving wheel) is consistent with the translational velocity of driven member, so a tangible advantage is arranged: transmission efficiency is very high, life-span is longer, but with regard to its combination itself.The function of no deceleration force amplifier, in the occasion of low-speed heave-load, they all need be equipped with the huge retarder of structure, thereby the volume of complete machine is increased, and cost also rises thereupon significantly.
From the mechanism of above various combinations as seen, compact structure whether or the manufacture cost size just be the implacable contradiction of seeming of a pair of obvious existence with transmission efficiency.At this contradiction, the present invention is based on analysis to above-mentioned various mechanisms power transmission principle, proposed to form the scheme of driving mechanism by the straight sided of eccentric shaft, centering block W dentulous mechanism and straight-bar dentulous or chain etc.Purpose is to make this change to rotate to straight-line force transmission mechanism had not only had multiple tooth stressed (contact ratio is big), decelerability is good and the advantage of compact structure but also can have lower flank of tooth slip velocity and higher transmission efficiency.
The present invention is achieved in that
(1) mainly forms and the motion skeleton diagram.
Main composition is: eccentric shaft, centering block front are worn W mechanism and the straight-bar dentulous or the chain of tooth.
The motion skeleton diagram:
(2) various W mechanism in the present invention with the relation of " centering block ":
(Shanghai science tech publishing house publishes for BH Ke Telve person husband work, Chinese translation, the 1st printing April in 1962 in " planetary pinion transmission ".) in the literary composition the 5th page putting down in writing passage like this: " we discuss K-H-V transmission (Fig. 6) now.Between parallel axes, realize velocity ratio equal+mechanism's (abbreviating the W of mechanism later on as) of 1 is the inalienable part of this transmission, does not adopt gear engagement in W mechanism ..." in the present invention W mechanism be inalienable part too, this is because it has the cause of unique motion: establish two-parallel axis and be respectively A, B.When arbitrary axle A among them and frame fixedly the time, under the drive of eccentric shaft, another root axle B will do translation, and any point track on it will be that some same eccentric arms with eccentric shaft are the circle of radius.The present invention as plate-like, and make this B axle abundant and has the tooth of same tooth corridor in its straight sided, is named " centering block ".From last summary as can be known: the tooth on " centering block ".Based on " same track " this point, under band tooth straight-bar or the external force effect on the chain, will produce almost same stress from conjugation with it.Why the present invention that Here it is has the basic place of very big contact ratio.
According to the definition of " planetary pinion transmission " literary composition, the scope of the W mechanism of indication has been included following several mechanisms at least, and by above design, any among them all can produce among the present invention " centering block ":
(1) parallel-crank mechanism (accompanying drawing 4):
In the fourbar linkage " ABCD ", crank AD and crank CB are isometric, and connecting rod CD and frame AB are isometric, are called as parallel-crank mechanism.When as eccentric shaft and with isometric another crank EF of AD during with angular velocity+ω rotation, connecting rod DC goes up any point and will produce E and order the same the circle that track-radius equals EF, but with regard to connecting rod itself.It only does translation, and is the same with frame.Its angular velocity of rotation is zero, thereby it is a kind of of W mechanism.If make tooth, promptly become and of the present inventionly " centering block " at the upper side of such connecting rod.
(2) output mechanism in few tooth poor (N type) planetary pinion transmission-comprise pin axle type and slide block type (see in " mechanical design handbook " the 674th page of volume second edition-" mechanical design handbook " unite write group write).
(3) Green's shaft coupling (cross rolling shaft coupling-" planetary pinion transmission " (BH Ke Telve person husband work.Chen Dejian etc. translate, and Shanghai science tech publishing house publishes.The 1st printing April in 1962) the 5th page of note.〕
As with making " straight sided has tooth " with part that planet wheel is connected mutually in (2), (3) mechanism, also just become " centering block " among the present invention.
(3) relation between eccentric shaft, centering block and toothed straight-bar or the chain (accompanying drawing 2, accompanying drawing 3):
Modern is that " circle "-be named this " circle " is pinwheel or roller with the tooth tooth corridor on straight-bar or the chain, and straight-bar is a shank accordingly.Corresponding chain is a roller chain; Tooth tooth corridor on the centering block is that this situation of equidistant curve of cycloid is an example, make an explanation following (situation of the conjugation tooth of other type is therewith roughly the same):
Fig. 2 represents the structural principle of an example of the present invention.
Centering block (11), (12), (13) that Fig. 3 a, 3b, 3c and 3d express in certain ifm diagram 2 reach the relation between (14), pinwheel (4) and each eccentric disc (6).OO among Fig. 3
1, OO
2, OO
3And OO
4Be respectively and the eccentric arm of corresponding each eccentric disc of centering block, their size is e, and with horizontal angle promptly " phase place " φ be respectively 0,1/2 π, π and 3/4 π.Their phase difference △ φ=1/2 π.Fig. 3 also expresses teeth groove (" EFG " of Fig. 3 a of adjacent centering block side." the E of Fig. 3 d
1F
1G
1") center line is with respect to the center of circle O by each centering block hole
1, O
2, O
3And O
4Horizontal position relation:
Both overlap Fig. 3 a; Fig. 3 d, 3c and 3b are then respectively at a distance of C, 2C and 3C.Wherein C is " straight line potential difference ", its value:
C＝ 1/4 ×2πe＝ 1/2 πe
In addition:
(1) when the centering block number is m, phase difference △ φ=(2 π)/(m); Straight line potential difference C=(2 π e)/(m).
(2) pinwheel pitch (or straight-bar tooth pitch)=centering block tooth pitch=T=2 π e, the distance of passing by in turn in the center of circle in this value and centering block hole matches.In this pitch, can settle n tooth (n=1,2,3,4) on demand again.At this moment the distance of adjacent teeth homonymy tooth corridor on the nodel line is called tooth apart from T
n, its value:
T
n＝ (T)/(n+1)
Suppose when the eccentric shaft of forming by driving shaft (5) and eccentric disc (6) rotation among Fig. 2, to make the eccentric arm among Fig. 3 do counterclockwise to rotate.Illustrating moment, centering block (11) has been in the position finally of one-period.Be about to break away from pinwheel; Centering block (14) just enters engagement; Centering block (13) and (12) all are in disengaging configuration.Change if eccentric shaft turns over 1/4th, just eccentric arm is by counterclockwise turning over 1/2 π, and then transposition will be distinguished in the center of circle in each centering block hole:
Phase of living in after the center of circle transposition in centering block hole
O
4→ O
O
3→ 3/4 π
O
2→ π
O
1→ 1/2 π
Consequently: centering block (14) finishes engagement, and centering block (13) enters engagement, and all the other then are in disengaged position ...The rest may be inferred, moves in endless cycles.The operating angle of each centering block is 1/2 π-from 3/2 π to 2 π in the middle of this, and promotes toothed straight-bar or chain displacement distance 1/2 π e successively.After eccentric shaft rotated a turn over, it was 2 π e that the accumulative total of straight-bar or chain is moved distance.
From as can be known above-mentioned, desire to make the continuous motion of straight-bar or chain energy.The quantity of centering block must be more than two.
(4) at the shaped tooth of the straight sided of " centering block ".
The driven member that the present invention is directly carried is the straight-bar or the chain of band tooth, and the tooth of centering block is conjugation with it, and promptly its tooth corridor equation should be a condition with the characteristics of motion and the driven member tooth corridor of demand, serves as according to deriving with basic engagement theorem.As an example, list centering block tooth corridor equation following (accompanying drawing 5) with the pinwheel conjugation below:
If the characteristics of motion of the straight-bar of demand or chain is S=ewt.:
In the formula:
S is the distance of moving of straight-bar or chain; T is a time parameter; E is the throw of eccentric of eccentric shaft; A is the pinwheel outer radius; W is the angular velocity of rotation of eccentric shaft." xoy " shown in Figure 5 is a bit being initial point on the nodel line, and the rectangular coordinate system that is connected with centering block.
Equation (A) representative be the equidistant curve b of a cycloid a.It draws like this: make centering block with respect to the shank stop motion with the conversion of motion method.And translation opposite with centering block moving direction of the extra acquisition of shank.At this moment, it is that the round as a ball d of e is when rolling on nodel line Ox that the track of the some O process on the centering block plane that fixes with shank will be equivalent to radius among Fig. 5, the track of the O point process on motionless plane that fixes with it, (spacing is the curve b that a) is equation (A) representative to the equidistant curve of this track.According to same reason, when on the centering block pinwheel being set, the conjugation tooth corridor on the straight-bar that moves also will be the equidistant curve that is formed cycloid n by round as a ball m.In addition, as the tooth corridor,,, curve b can be replaced with approximate circular arc in the less demanding use occasion of kinematic accuracy for the actual demand on using and processing.
When eccentric distance e is big, also be feasible with straight-tooth-involute fully as conjugation tooth of the present invention corridor, in a word, as long as meet characteristics of motion S=ewt, the tooth corridor of mutual conjugation all can be used as the tooth corridor of wanting required for the present invention again.
Flank of tooth contact ratio of the present invention is very big at first as can be known from above-mentioned, and this is one of its characteristics, according to formula:
S=ewt; When wt=2 π, S=2 π e=T
As can be known when eccentric distance e hour, initiatively eccentric shaft is whenever goed around, the moving of the straight-bar of band tooth or chain, thereby the present invention has decelerability preferably apart from also less, this is two of its characteristics.When adopting four " centering block ", derivation draws according to theory: if the conjugation tooth corridor among the present invention adopts " circle " to reach the equidistant curve of " cycloid ", their loss coefficient φ in transmission process are about 8.5%, and be that 2.5 °, friction factor are that 0.1 common spiral motion is in fact secondary for helix angle, its loss coefficient is then up to 70%.This shows that the present invention also has higher transmission efficiency and long life-span, this is three of its characteristics.
Based on these characteristics, under the suitable situation of transferring power, volume and weight of the present invention has only 1/3～1/2 of rack and pinion drive mechanism; The complete machine transmission efficiency then is 2.5～3 times of bolt and nut mechanism.It can be widely used in handling machinery and the press.
Using an example of the present invention is a small-sized hand crane tool.The complete machine structure is shown in accompanying drawing 1,2.Made a model machine, it has fully confirmed the correct of theory analysis on motion principle and bearing behavior.
Accompanying drawing 1 is the schematic perspective view of an example of the present invention.
Accompanying drawing 3 is kinematic relation figure of eccentric disc, centering block and shank.(4) be pinwheel; (6) be eccentric disc; (11), (12), (13) and (14) are centering blocks; O is the center of driving shaft; O
1, O
2, O
3And O
4It is the center of circle in centering block hole; E is the eccentric arm of eccentric disc; T is the pitch of shank or tooth.
Accompanying drawing 4 is schematic representation of parallelogram lindage.
Accompanying drawing 5 is cycloid figure.A and n are cycloids; D and m are round as a ball, and their radius is e; C is a pinwheel; B is the equidistant curve of cycloid a.(x(t) .y(t)) be the coordinate of putting on this equidistant curve; Xoy is a bit being initial point on the nodel line and rectangular coordinate system that be connected with centering block.
Claims (3)
1, a kind of rotation becomes straight-line new mechanism, it is characterized in that W mechanism and straight-bar dentulous or chain etc. that the present invention wears tooth by eccentric shaft, centering block front form.
2,, it is characterized in that being provided with in the W mechanism straight sided centering block dentulous more than two according to the described mechanism of claim 1.
3, according to claim 1,2 described mechanisms, it is characterized in that on centering block and straight-bar or the chain the mutual conjugation in tooth tooth corridor or near conjugation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86104622 CN1016525B (en) | 1986-06-27 | 1986-06-27 | Conversion mechanism of rotation to rectilinear motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86104622 CN1016525B (en) | 1986-06-27 | 1986-06-27 | Conversion mechanism of rotation to rectilinear motion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86104622A true CN86104622A (en) | 1987-01-14 |
| CN1016525B CN1016525B (en) | 1992-05-06 |
Family
ID=4802541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86104622 Expired CN1016525B (en) | 1986-06-27 | 1986-06-27 | Conversion mechanism of rotation to rectilinear motion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016525B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2540902B1 (en) * | 2011-06-30 | 2020-05-13 | Electrolux Home Products Corporation N.V. | Laundry washing machine |
-
1986
- 1986-06-27 CN CN 86104622 patent/CN1016525B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1016525B (en) | 1992-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202955184U (en) | Complex wave type harmonic drive speed reducer | |
| CN103277478A (en) | Combined-harvester four-gear gearbox assembly | |
| CN108297075A (en) | A kind of leaf spring type variation rigidity flexible actuator based on rack pinion | |
| CN2315354Y (en) | Cycloidal steel ball speed reducer | |
| CN1580609A (en) | Parallel shaft transmission | |
| CN86104622A (en) | A kind of rotation becomes straight-line new mechanism | |
| CN201071906Y (en) | Hydraulic reversing transmission of minitype loader | |
| CN1580607A (en) | Parallel shaft transmission | |
| CN103115112B (en) | Inner and outer tooth form meshing gear reducer | |
| CN201606458U (en) | Speed changing box of mini-tiller | |
| CN212447948U (en) | Labor-saving accelerating device | |
| CN2369034Y (en) | Transmission roller, gear rack and wheel | |
| CN203233706U (en) | Combine-harvester five-gear transmission assembly | |
| CN211715701U (en) | Multi-tooth meshing speed change mechanism | |
| CN214699047U (en) | Lever linkage machine | |
| CN208793530U (en) | A kind of transmission case of double dynamical output | |
| CN2784673Y (en) | A speed regulating device | |
| CN2311655Y (en) | Compound pendulum type internal engagement few tooth differential planetary driver | |
| CN212928699U (en) | Novel penetrating rod movable tooth transmission device | |
| CN208369390U (en) | A kind of umbrella tooth type rotary-connecting electric cylinder | |
| CN1368422A (en) | Speed reducer with micro back lash for industrial robot | |
| CN2304502Y (en) | Horizontal lathe feed gearbox | |
| CN2471454Y (en) | Horizontal lathe feed gearbox | |
| CN211820655U (en) | Speed reducer with skewed tooth clutch | |
| CN1804391A (en) | Gravity engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CI01 | Publication of corrected invention patent application |
Correct: Shao Xiaomiao False: Zou Xiaomiao Number: 3 Page: 52 Volume: 3 |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ERR | Gazette correction |
Free format text: CORRECT FROM: ZOU XIAOMIAO TO: SHAO XIAOSEN |
|
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |