CN85105554A - Buffering weakening coupling and buffering weakening connecting rod - Google Patents
Buffering weakening coupling and buffering weakening connecting rod Download PDFInfo
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- CN85105554A CN85105554A CN 85105554 CN85105554A CN85105554A CN 85105554 A CN85105554 A CN 85105554A CN 85105554 CN85105554 CN 85105554 CN 85105554 A CN85105554 A CN 85105554A CN 85105554 A CN85105554 A CN 85105554A
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Abstract
The present invention relates in a kind of mechanical actuation can elimination and separating vibration, raising band inertia load ability have the buffering weakening coupling and the buffering weakening connecting rod of higher transmission accuracy again.The way that adopts two-way prefastening torque (or power) and add internal friction moment of torsion (or power) obtains the effect of buffering and weakening.
Description
The present invention relates in a kind of mechanical transmission can elimination and separating vibration, raising band inertia load ability have the buffering weakening coupling of higher transmission accuracy again, and the buffering weakening connecting rod that has identical inventive concept, similar drive characteristic with it.
Known rigid coupling, as and case butt coupling, have higher transmission accuracy, do not eliminate and the performance of separating vibration but do not have, and be with the ability of inertia load lower, be not suitable for Fraquent start, stop and occasion such as rotation speed change fierceness.Under aforementioned occasion, often to solve contradiction with the cost that strengthens input power or reduction motion speed.
The elastic coupling flexible coupling of known connection Xiao Zi cylindrical bag rubber (or leather) cover utilizes the internal damping of elastic material to carry out weakening, and the weakening effect is obvious inadequately.This coupling under the influence of load friction, can make transmission produce the dead band, can not be used for the high occasion of required precision.Reduce the torsional stiffness of elastic coupling flexible coupling, can improve buffer function, this is because the resiliently deformable of coupling can prolong the adding (subtracting) speed time of load when starting, stopping with the rotation speed change fierceness inertia torque to be descended, the reduction of coupling rigidity on the other hand, correspondingly reduce the natural frequency of vibration of system, can play the vibration between isolation power plant and load.But so, because of transmitting angle hysteresis error that load torque produces and because of arriving unallowable degree greatly in fricative transmission dead band; Increase elastic link simultaneously, also may cause excited vibration; In addition, under the influence of dynamic and static frictional drop, the reduction of system stiffness increases the possibility that generation is creeped under the low speed transmission.Here it is does not generally adopt the reason of hanging down torsional stiffness elasticity shaft coupling up to now.
Relation curve M=F(φ from angular displacement φ between the moment of torsion M of coupling transmission and input, output terminal): the M=F(φ of rigid coupling) be similar to vertical line by true origin; The M=F(φ of elastic coupling flexible coupling) curve is the oblique line by origin of coordinate, different M=F(φ) curve, determined this two kinds of coupling advantage separately and problem of existence.
Task of the present invention be design a kind of can elimination with separating vibration, raising band inertia load ability and the buffering weakening coupling of higher transmission accuracy is arranged and have identical inventive concept and the buffering weakening connecting rod of similar drive characteristic.
Achieve the above object, will concentrate the advantage on rigid coupling and the elastic coupling flexible coupling performance, overcome the problem that they exist separately again.Concrete design is:
1. add elastic link and suitably reduce the torsional stiffness of elastic component, utilize resiliently deformable be improved the band inertia load ability and isolate the effect of vibrating between power plant and load.
2. add friction torque in coupling inside, when producing relative movement between coupling input, output, work to eliminate vibration.
3. adopt the way of two-way pretension moment shell, add side effects such as the possibility increase of creeping under driving angle hysteresis error, dead band and the low speed transmission that friction torque brings to eliminate because of introducing elastic link and coupling inside.
Adopt the relation curve M=F(φ of relative angular displacement φ between the torsion pass square M of coupling institute of above design design and input/output terminal) have step evolution to change at φ=0 M of place, in φ＞0 and φ＜0 separate stagnant ring is arranged.In the step response of φ=0 o'clock M, embody the character of rigid coupling, can eliminate angle hysteresis error and transmission dead band in the stable state transmission.Before this, under the topic, suitably reduce the firm change of reversing of elastic component, make the corresponding reduction of dynamic rate at φ=0 place, thereby good buffer function is arranged, can improve the ability of band inertia load and isolate the effect of vibrating between power plant and load.The long-pending pairing energy of the anchor ring that stagnates is the used up vibrational energy of friction, is used for the original vibration of elimination system and because of introducing the excited vibration that elastic link may cause.Because the φ angle that needs produced of buffering changes the dynamic driving error of bringing, can obtain corresponding compensation by the raising of eliminating the dynamic transmission precision that vibrates and obtain.The influence of the inner dynamic and static frictional drop of coupling is at characteristic curve M=F(φ) in only be reflected as the variation of φ=0 o'clock M step amplitude, overcome the static friction moment of torsion, do not rely on the increase of elastic component potential energy.Therefore, the sound frictional drop of coupling itself and flexible cooperation can not become the factor of creeping.Suitably select the step amplitude of φ=0 o'clock M, make prefastening torque, just can prevent the crawling problems that brings behind this coupling in the transmission at a slow speed because of using greater than coupling inside static friction moment of torsion and load static friction moment of torsion sum.
More than the principle of Fen Xiing also is applicable to the straight-line buffering weakening connecting rod of transmission.
The concrete structure of buffering weakening coupling is:
Coupling two ends respectively are a sleeve that an end band monodentate is arranged, and the band increment endoporus and the same axle of two sleeves are slippery, and the other end is the spline endoporus.Two Xiao Zi that are vertically fixed on the axle cylindrical link to each other with the pretension torsion spring that an end is fixed on two opposite directions rotation on the sleeve respectively, make Xiao Zi be pressed on the tooth of sleeve ends, produce the prefastening torque of positive and negative two directions.Axle two ends outwards are equipped with friction plate, pad, belleville spring and adjustment nut successively.The friction plate periphery is made the splined hole cunning of spline-shaped and sleeve and is joined.Regulate to adjust nut, can regulate belleville spring and be added to pressure on the friction plate, reach the purpose of regulating friction torque by pad.
Require lower occasion at some, also can use following simplified structure: an end and the axle cunning of sleeve are joined, leaf spring is stuck in the radially elongated slot of sleeve and axle two sides, and has made it certain precompression, is used to produce between sleeve and axle prefastening torque in relative rotation.The triangular rubbing action of sleeve, axle and leaf spring produces the friction torque of coupling inside.
Have the structure of the buffering weakening connecting rod of common inventive concept, similar drive characteristic to be to buffering weakening shaft joint:
Two ends of sleeve are slippery with the end bead of two axles respectively.Two stage clips match with sleeve, axle and adjustment cover respectively and produce rightabout pretightening force.Regulate the power of holding tightly that plug can be regulated the friction ring center roller, thereby regulate the size of frictional force between axle and friction ring.
Describe below in conjunction with accompanying drawing:
Fig. 1 is the torque angle displacement characteristic curve M=F(φ of rigid coupling), be the vertical line that is similar to by origin of coordinate, promptly the φ perseverance is zero.This coupling has the high advantage of transmission accuracy; Shortcoming is not have buffer function, can not eliminate vibration.
Fig. 2 is the torque angle displacement characteristic curve M=F(φ of elastic coupling flexible coupling), be oblique line by origin of coordinate 0.Moment of torsion M effect outside produces angular displacement φ down between input, output terminal, the advantage of buffer function is arranged, and shortcoming is that driving error is big, and friction load moment of torsion M is being arranged
0The time, can produce △ φ 〉=φ 〉=-dead band of △ φ scope.
Fig. 3 is the structural drawing of buffering weakening coupling:
Two sleeves (1) and same axle (2) sliding fit, two Xiao Zi (3) that are fixed on the axle (2) are connected with the end of dextrorotation spring (4) with left-handed spring (5) respectively.The other end of spring (4), (5) respectively be fixed on sleeve (1) on two Xiao Zi (6) be connected.Prefastening torque by spring (4), (5) is pressed on the end tooth of sleeve (1) two Xiao Zi (3) respectively.Regulate to adjust nut (7) may command belleville spring (8) and be added in pressure on the friction plate (10), the size that can regulate friction torque by pad (9).
When Fig. 4 is expression transmitting torque M (M is greater than prefastening torque and friction torque sum), produce the situation of relative angular displacement φ between input, output terminal.
Fig. 5 is M(or the φ that continuously changes among Fig. 4) time relation curve M=F(φ that obtains).The step response of φ=0 o'clock M is similar in appearance to the characteristic of rigid coupling, at Md 〉=M 〉=M
nScope in, have the character of rigid coupling, higher transmission accuracy is arranged and can not produce crawling problems under dead band and the low speed transmission.The M=F(φ at φ ≠ 0 place), similar in appearance to the characteristic of low rigidity elastic coupling flexible coupling, making has good buffer function under the current intelligence of φ ≠ 0 o'clock, can improve band inertia load ability and isolate the effect of vibrating between power plant and load.Stagnate and encircle the area of ABCD and EFGH, be proportional to the energy that friction consumes, work to eliminate vibration.
Fig. 6 is the simplified structure of buffering weakening coupling:
Sleeve (1) and axle (2) are sliding joins, and leaf spring (3) is stuck in the radially elongated slot of sleeve (1) and axle (2) side and makes it certain impacting force, is used to produce between sleeve (1) and axle (2) prefastening torque in relative rotation.The friction torque of the friction-produced coupling inside between sleeve (1) axle (2) and leaf spring (3) three.
Fig. 7 is buffering weakening bar linkage structure figure:
Two ends of sleeve (1) are slippery with two axles (2) end bead respectively.Two stage clips (3) match with sleeve (1), axle (2) and two adjustment covers (4), produce rightabout axial pre tightening force.Adjust cover (4) and can regulate the size of pretightening force.Plug (5) can regulate tapered sleeve (6) is to the pressure of friction ring (7), thereby the power of holding tightly of regulating friction ring (7) center roller (2) finally reaches the frictional force of regulating axial relative movement between axle (2) and friction ring (7).
Fig. 8 is the comparison schematic representation that the original power angle displacement wave deltoid (1) when being equivalent to the reaction stepping motor single step run of step input and adding cushions the power angle displacement wave deltoid (2) after the transmission of weakening coupling.As can be seen from the figure, reach equilibrium position φ
1The former is t time
1, the latter is t
2, and t
2＞t
1Explanation is at (t＜the t for example of stage hard
1) time, can increase dynamin error after adding the buffering vibration absorber.But, depart from equilibrium position φ with waveform because waveform (2) is steady
1The area that is comprised be as the criterion (integral estimation) make comparisons, add buffering weakening coupling after dynamic precision be significantly improved.Among Fig. 8 as at t
3Stepper motor begins to walk next step constantly, and then former scheme this process occurs repeatedly because vibration accumulation amplitude will strengthen, and frequency multiplication resonance will occur, and stepper motor produces fierce vibration and loses the step even.In order to prevent to lose the step, some producers adopt the way of axial pretightening bearing to produce friction torque, to eliminate partial vibration.So, not only can lose the partial load moment of torsion, can produce the dead band simultaneously and make precise decreasing.Carry out the stepper motor weakening with buffering weakening coupling, not only can make motion quite steady, and do not lose load torque and produce the dead band.Buffering weakening coupling can also make the band inertia load starting capability of reaction stepping motor obviously improve.
It below only is a kind of application example of buffering weakening coupling.
Claims (4)
1, a kind of machenical coupling, it is characterized in that with two-way pretension and add the way of internal friction, the short angle characteristic M=F of its transmission (φ) is had in step variation and 1,3 quadrants at φ=0 M of place separate stagnant ring, plays the buffering weakening, and corresponding principle also can be used for mechanical linkage.
2,, it is characterized in that dextrorotation spring (4) and left-handed spring (5) add the prefastening torque of positive and negative two directions respectively by two pins (3) and two pins (6) between two sleeves (1) and axle (2) according to the buffering weakening coupling of claim 1.Regulate to adjust nut (7) adjustable disc-shape spring (8) and be added to pressure on the friction plate (10) by pad (9), thus the friction torque when relatively rotating between regulating sleeve (1) and axle (2).
3, according to the simplification buffering weakening coupling of claim 1, it is characterized in that leaf spring (3) is pressed in the radially elongated slot of sleeve (1) and axle (2) two sides, produce the prefastening torque of relative movement between sleeve (1) and axle (2); The rubbing action of relative movement produces the internal friction moment of torsion of coupling between sleeve (1) and axle (2), leaf spring (3) three.
4, according to the buffering weakening connecting rod of claim 1, the two end endoporus that it is characterized in that sleeve (1) are slippery with the end flange of two single mandrel (2) respectively, adjust cover (3) and regulate the axial pre tightening force that two springs (4) produce the different direction between two axles (2) and sleeve (1); Plug (5) promotes tapered sleeve (6) makes friction ring (7) hold the frictional force that axle (2) produces axle (2) and friction ring (7) relative movement tightly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85105554 CN85105554A (en) | 1985-07-22 | 1985-07-22 | Buffering weakening coupling and buffering weakening connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85105554 CN85105554A (en) | 1985-07-22 | 1985-07-22 | Buffering weakening coupling and buffering weakening connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85105554A true CN85105554A (en) | 1987-01-28 |
Family
ID=4794552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85105554 Pending CN85105554A (en) | 1985-07-22 | 1985-07-22 | Buffering weakening coupling and buffering weakening connecting rod |
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| Country | Link |
|---|---|
| CN (1) | CN85105554A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107951531A (en) * | 2017-11-03 | 2018-04-24 | 师新虎 | A kind of medical robot bone drill component |
| CN107951530A (en) * | 2017-11-03 | 2018-04-24 | 师新虎 | A kind of pneumatic bone drill for medical robot |
| CN110985557A (en) * | 2019-11-15 | 2020-04-10 | 徐州九鼎锻造科技有限公司 | Aerogenerator main shaft that buffering effect is good |
| CN112290724A (en) * | 2020-10-19 | 2021-01-29 | 苏州朗高电机有限公司 | Protective structure for new energy passenger car driving motor |
-
1985
- 1985-07-22 CN CN 85105554 patent/CN85105554A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107951531A (en) * | 2017-11-03 | 2018-04-24 | 师新虎 | A kind of medical robot bone drill component |
| CN107951530A (en) * | 2017-11-03 | 2018-04-24 | 师新虎 | A kind of pneumatic bone drill for medical robot |
| CN107951531B (en) * | 2017-11-03 | 2019-10-22 | 杨少伟 | A kind of medical robot bone drill component |
| CN107951530B (en) * | 2017-11-03 | 2019-10-25 | 曹学成 | A kind of pneumatic bone drill for medical robot |
| CN110985557A (en) * | 2019-11-15 | 2020-04-10 | 徐州九鼎锻造科技有限公司 | Aerogenerator main shaft that buffering effect is good |
| CN110985557B (en) * | 2019-11-15 | 2021-11-23 | 徐州九鼎锻造科技有限公司 | Aerogenerator main shaft that possesses buffer function |
| CN112290724A (en) * | 2020-10-19 | 2021-01-29 | 苏州朗高电机有限公司 | Protective structure for new energy passenger car driving motor |
| CN112290724B (en) * | 2020-10-19 | 2021-06-29 | 苏州朗高电机有限公司 | Protective structure for new energy passenger car driving motor |
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