CN109099072B - Quasi- zero stiffness yielding coupling - Google Patents
Quasi- zero stiffness yielding coupling Download PDFInfo
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- CN109099072B CN109099072B CN201810936411.XA CN201810936411A CN109099072B CN 109099072 B CN109099072 B CN 109099072B CN 201810936411 A CN201810936411 A CN 201810936411A CN 109099072 B CN109099072 B CN 109099072B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/56—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to a kind of quasi- zero stiffness yielding couplings.The positive rigidity elastic piece of the quasi- zero stiffness yielding coupling is fixedly connected between the first connecting shaft part and the second connecting shaft part；Stiffness tuning elastic piece one end is rotatably connected at the first connecting shaft part around first axle, and the other end is rotatably connected at the second connecting shaft part around second axis；The sagittal plane that the central plane that first axle and second axis are formed, opposite second axis and the second connecting shaft part axis are formed is in predetermined angle.When being in equipoise, if because of twisting vibration relative torsion occurs for the first, second connecting shaft part at this time, stiffness tuning elastic piece provides negative torsion stiffness, the positive torsion Stiffness provided with positive rigidity elastic piece, so that zero torsion stiffness is presented in shaft coupling.Therefore, above-mentioned quasi- zero stiffness yielding coupling has the function of high rigidity, the characteristic of low dynamic stiffness, it can be achieved that bearing big nominal torque and isolation Low Frequency Torsional Vibration, and structure is simple, components are less, processing and assembling process are simple.
Description
Technical field
The present invention relates to shafting torsion damping mechanisms, more particularly to a kind of quasi- zero stiffness yielding coupling.
Background technique
Twisting vibration phenomenon is prevalent in the fields such as automobile, naval vessel, aerospace, and essentially all of shafting has torsion
The dynamic problem of rotational oscillation.Twisting vibration can cause gear wear, axle fracture, and then influence the normal work of mechanical equipment.Violent
Twisting vibration also brings along noise problem, especially aircraft, the engine on naval vessel, the strong noise meeting due to caused by twisting vibration
Seriously affect stealth effect.For precision engineering field, such as Space Vehicle System, it is smart that twisting vibration will affect using for precision instrument
It is close.
In order to eliminate or weaken the twisting vibration of shafting, yielding coupling is widely used.Yielding coupling, such as rubber
Shaft coupling is connected between driving shaft and driven shaft, and the driving moment of driving shaft is transmitted on driven shaft, and also act as every
Effect from twisting vibration.But transmit big driving torque, it is desirable that yielding coupling has high rigidity, and torsion vibration is isolated
It is dynamic then need yielding coupling have Low rigidity.Quasi- zero stiffness yielding coupling have simultaneously can transmit large driving force square and compared with
Good isolation twisting vibration performance.
But existing quasi- zero stiffness yielding coupling structure is complex, components are more, and processing and assembling process are multiple
It is miscellaneous.
Summary of the invention
Based on this, it is necessary to for quasi- zero stiffness yielding coupling structure in the prior art it is complex, components compared with
More, the problem of processing and assembling process complexity provides a kind of simplified structure, reduces components, simplifies and process and assembling process
Quasi- zero stiffness yielding coupling.
Quasi- zero stiffness yielding coupling, comprising:
First connecting shaft part, in a ring；
Second connecting shaft part is located in the first connecting shaft part, and is coaxially disposed with the first connecting shaft part；
One end of at least two positive rigidity elastic pieces, each positive rigidity elastic piece is fixedly connected on first connecting shaft
Part, the other end are fixedly connected on the second connecting shaft part；
At least two stiffness tuning elastic pieces, one end of each stiffness tuning elastic piece connect around being parallel to described second
The first axle of shaft member axis is rotatably connected at the first connecting shaft part, and the other end is around being parallel to the second connecting shaft part axis
The second axis of line is rotatably connected at the second connecting shaft part；
The central plane that the first axle and the second axis are formed, the relatively described second axis and described second connect
The sagittal plane that the axis of shaft member is formed is in predetermined angle, when the relatively described first connecting shaft part of the second connecting shaft part is to default
In the rotary course of direction, the first connecting shaft part and the second connecting shaft part apply pressure to the stiffness tuning elastic piece respectively and answer
Power, so that the stiffness tuning elastic piece is swingable to equipoise；When the stiffness tuning elastic piece is in described quiet flat
When weighing apparatus position, the central plane is coplanar with the sagittal plane.
Above-mentioned quasi- zero stiffness yielding coupling, in use, when the first connecting shaft part and the second connecting shaft part reach quiet flat
When weighing apparatus state, positive rigidity elastic piece provides and the first connecting shaft part and the second connecting shaft part is maintained to rotate synchronously since flexible deformation occurs
Torque.Therefore, the torsion stiffness of positive rigidity elastic piece is positive rigidity, plays the role of bearing nominal torque.Meanwhile rigidity tune
Section elastic piece is rocked to equipoise, i.e., above-mentioned central plane is coplanar with sagittal plane.When twist vibrate when, first connect
Small relative motion occurs for shaft member and the second connecting shaft part, and stiffness tuning elastic piece shifts the small of equipoise therewith
It swings, and generates and push the first connecting shaft part and the second connecting shaft part that the torque of relative motion occurs.Therefore, in equipoise and this
Near equipoise, the torsion stiffness of stiffness tuning elastic piece is negative stiffness.Due to, the positive rigidity of positive rigidity elastic piece and just
The negative stiffness that degree adjusts elastic piece is in parallel, so that zero torsion stiffness is presented in equipoise shaft coupling, and in equipoise
Small rigidity is presented in neighbouring shaft coupling.Therefore, shaft coupling have high Static stiffness, low dynamic stiffness feature, it can be achieved that bearing big specified
The function of torque and isolation Low Frequency Torsional Vibration.
In this way, quasi- zero stiffness yielding coupling have low dynamic rate, high static rigidity characteristic, it can be achieved that shafting is ultralow
The isolation of frequency twisting vibration, and larger driving torque can be transmitted.Meanwhile compared with prior art, above-mentioned quasi- zero stiffness elasticity connection
Axis device structure is simple, components are less, and processing and assembling process are simple.
In one embodiment, each described positive rigidity elastic piece all has bending part, and each positive rigidity bullet
Property piece the bending part to the same side protrude.In this way, increase the elastic deformation amount of positive rigidity elastic piece, be conducive to enhancing every
Vibration effect.
In one embodiment, the positive rigidity elastic piece is in " several " font.
In one embodiment, the stiffness tuning elastic piece includes first connecting portion, relative to the first connecting portion
Second connecting portion and the elastic portion that is connected between the first connecting portion and the second connecting portion, the first connecting portion
It is rotatably connected at the first connecting shaft part around the first axle, the second connecting portion can be rotated around the second axis
Ground is connected to the second connecting shaft part.
In one embodiment, the elastic portion includes two elastic pieces, and the opposite end of each elastic piece is distinguished
It is fixedly connected on the first connecting portion and the second connecting portion, and separate direction is curved to each other for two elastic pieces
It is bent.In this way, two elastic pieces are non-interference in flexible deformation phase, deformation is synchronized, and elastic-restoring force is easily controllable, not rapid wear
It is bad, long service life.
In one embodiment, the inner wall forming of the first connecting shaft part has the axis direction along the second connecting shaft part to prolong
The first groove stretched；The one end of the first connecting portion far from the second connecting portion can be rotated around the axis of first groove
Ground is embedded in first groove；
The circumferential side wall of the second connecting shaft part is formed with the second recessed of the axis direction extension along the second connecting shaft part
Slot；The one end of the second connecting portion far from the first connecting portion is rotatably inserted into institute around the axis of second groove
It states in the second groove.In this way, realizing being rotatably connected for stiffness tuning elastic piece and the first connecting shaft part and the second connecting shaft part, make
Obtaining stiffness tuning elastic piece in actual use can swing, to have near equipoise and equipoise
Negative torsion stiffness, and then the positive torsion Stiffness with positive rigidity elastic piece, are adjusted, really with the overall stiffness to shaft coupling
It protects in static balance state, zero torsion stiffness is presented in shaft coupling, and small rigidity is presented in shaft coupling near equilbrium position.Therefore,
Shaft coupling have high Static stiffness, low dynamic stiffness feature, it can be achieved that shafting ultralow frequency twisting vibration isolation.
In one embodiment, the cross section of first groove is in the circle with the first opening；First connection
The one end in portion has the first cylindrical portion that the axis direction along the second connecting shaft part extends, and first cylindrical portion is embedded at institute
It states in the first groove, the other end of the first connecting portion is stretched out by first opening and connect with the elastic portion.
In one embodiment, the cross section of second groove is in the circle with the second opening；Second connection
The one end in portion has the second cylindrical portion that the axis direction along the second connecting shaft part extends, and second cylindrical portion is embedded at institute
It states in the second groove, the other end of the second connecting portion is stretched out by second opening and connect with the elastic portion.In this way,
When assembling stiffness tuning elastic piece, the first cylindrical portion need to be only directed to one end of the first groove, by the second cylindrical portion alignment the
Corresponding one end of two grooves, then synchronous insertion, that is, complete the assembly of stiffness tuning elastic piece, assembling process is simply easily grasped
Make, does not need by assembly tool.
In one embodiment, the positive rigidity elastic piece and the stiffness tuning elastic piece are along the second connecting shaft part
Circumferential direction replaces and arranges at equal intervals.In this way, making positive rigidity elastic piece and stiffness tuning elastic piece to the first connecting shaft part and second
The power that connecting shaft part applies reaches dynamic balance in radial directions, prevents from leading to the first connecting shaft part and second because of radial force unevenness
The center axis deviation of connecting shaft part.
In one embodiment, the first connecting shaft part, the second connecting shaft part and the positive rigidity elastic piece use 3D
Printing integrated molding.In this way, processing and manufacturing is simple.
Detailed description of the invention
Fig. 1 is the main view of the quasi- zero stiffness yielding coupling in an embodiment of the present invention；
Fig. 2 is the schematic perspective view of quasi- zero stiffness yielding coupling shown in FIG. 1；
Fig. 3 is the schematic perspective view of the stiffness tuning elastic piece of quasi- zero stiffness yielding coupling shown in FIG. 1；
Fig. 4 is the stereochemical structure signal for having removed stiffness tuning elastic piece of quasi- zero stiffness yielding coupling shown in FIG. 1
Figure；
Fig. 5 is corner-torque curve of quasi- zero stiffness yielding coupling shown in FIG. 1；
Fig. 6 is the torsion stiffness curve graph of quasi- zero stiffness yielding coupling shown in FIG. 1.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more saturating
It is thorough comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Fig. 1 is the main view of the quasi- zero stiffness yielding coupling in an embodiment of the present invention.Fig. 2 is standard shown in FIG. 1
The schematic perspective view of zero stiffness yielding coupling.
Referring to Figure 1 and Fig. 2, the quasi- zero stiffness yielding coupling in one embodiment of the invention, including the first connecting shaft part
10, the second connecting shaft part 20, at least two positive rigidity elastic pieces 30 and at least two stiffness tuning elastic pieces 40.
First connecting shaft part 10 is in a ring.Second connecting shaft part 20 is located in the first connecting shaft part 10, and with the first connecting shaft part 10
Coaxial arrangement.
Each positive 30 one end of rigidity elastic piece is fixedly connected on the first connecting shaft part 10, and the other end is fixedly connected on the second connecting shaft
Part 20.In this way, positive rigidity elastic piece 30 is to the first connecting shaft part 10 when the first connecting shaft part 10 and the second connecting shaft 20 relative rotation of part
And second connecting shaft part 20 apply respectively retardance the first connecting shaft part 10 and the second connecting shaft part 20 occur relative rotation drag.
One end of each stiffness tuning elastic piece 40 rotationally connects around the first axle for being parallel to the second connecting shaft part axis
It is connected to the first connecting shaft part 10, the other end is rotatably connected at the second connecting shaft around the second axis for being parallel to the second connecting shaft part axis
Part 20.
The axis of the central plane that first axle and second axis are formed, opposite second axis and the second connecting shaft part 20 is formed
Sagittal plane be in predetermined angle, with when the opposite first connecting shaft part 20 of the second connecting shaft part 10 is into preset direction rotary course, the
One connecting shaft part 10 and the second connecting shaft part 20 apply compression to stiffness tuning elastic piece 40 respectively, so that stiffness tuning elastic piece 40
It is swingable to equipoise.When stiffness tuning elastic piece 40 is in equipoise, central plane is coplanar with sagittal plane.
At this point, the power that applies to the first connecting shaft part 10 and the second connector 20 of stiffness tuning elastic piece 40 is along the first connecting shaft part 10 and the
The radial direction of two connecting shaft parts 20.
In actual use, the first connecting shaft part 10 is connected to driven shaft, and with driven shaft synchronous rotary.Second connecting shaft
Part 20 is connected to driving shaft, and with driving shaft synchronous rotary.
When the second connecting shaft part 20 is revolved around axis to preset direction (i.e. counter clockwise direction in Fig. 1) under the drive of driving shaft
Turn, positive rigidity elastic piece 30 and stiffness tuning elastic piece 40 are provided which to make the first connecting shaft part 10 that the second connecting shaft part 20 be followed to rotate
Torque (blocks the first connecting shaft part 10 and relative motion occurs for the second connecting shaft part 20).Positive rigidity elastic piece 30 and rigidity tune at this time
The torsion stiffness of section elastic piece 40 is positive rigidity.
When the first connecting shaft part 10 and the second connecting shaft part 20 reach static balance state (i.e. the first connecting shaft part 10 and the second connecting shaft part
20 revolving speeds are identical) when, positive rigidity elastic piece 30 provides since flexible deformation occurs and maintains the first connecting shaft part 10 and the second connecting shaft
The torque that part 20 rotates synchronously, plays the role of driving torque.Therefore, the torsion stiffness of positive rigidity elastic piece 30 is still positive just
Degree plays the role of bearing nominal torque.
Meanwhile stiffness tuning elastic piece 40 is rocked to equipoise, i.e., above-mentioned central plane is coplanar with sagittal plane.When
It twists when vibrating, small relative rotation, stiffness tuning elastic piece 40 occur for the first connecting shaft part 10 and the second connecting shaft part 20
The small sway for deviateing equipoise is generated therewith, and generates and the first connecting shaft part 10 and the second connecting shaft part 20 is pushed to occur relatively
The torque of rotation, therefore, near equipoise and the equipoise, the torsion stiffness of stiffness tuning elastic piece 40 is negative
Rigidity.Since the positive rigidity of positive rigidity elastic piece 30 is in parallel with the negative stiffness of stiffness tuning elastic piece 40, so that in static balance position
It sets shaft coupling and zero torsion stiffness is presented, and small torsion stiffness is presented in shaft coupling near equilbrium position.Therefore, shaft coupling has height
Static stiffness, low dynamic stiffness feature are, it can be achieved that bearing big nominal torque and the function of Low Frequency Torsional Vibration being isolated.Meanwhile with it is existing
Technology is compared, and above-mentioned quasi- zero stiffness yielding coupling structure is simple, components are less, and processing and assembling process are simple.
It is understood that the first connecting shaft part 10 also can connect in driving shaft, and with driving shaft synchronous rotary.Second connects
Shaft member 20 is then connected to driven shaft, and with driven shaft synchronous rotary.Quasi- zero stiffness yielding coupling and driving shaft and driven shaft
This kind of mounting means, the case where in practical application with it is above-mentioned similar, therefore details are not described herein.
Continuing with referring to Fig. 1 and Fig. 2, in the embodiment of the present invention, each positive rigidity elastic piece 30 all has bending part,
And the bending part of each positive rigidity elastic piece 30 is protruded to the same side.In this way, increasing the flexible deformation of positive rigidity elastic piece 30
Amount is conducive to enhance vibration isolating effect and is driven bigger torque.
Specific in embodiment, positive rigidity elastic piece 30 is in " several " font.
Specific in embodiment shown in FIG. 1, the bending part of each positive rigidity elastic piece 30 protrudes counterclockwise.
It, can also be with it should be noted that the cross section of the axis perpendicular to the first connecting shaft part of bending part can be rectangle
It is arc or other shapes, as long as being capable of increasing the elastic deformation amount of positive rigidity elastic piece 30, and then enhances vibration isolating effect.
Please also refer to Fig. 3, in the embodiment of the present invention, stiffness tuning elastic piece 40 includes first connecting portion 42, opposite
Second connecting portion 44 in first connecting portion 42 and the elastic portion 46 that is connected between first connecting portion 42 and second connecting portion 44.
First connecting portion 42 is rotatably connected at the first connecting shaft part 10 around first axle, and second connecting portion 44 can be rotated around second axis
Ground is connected to the second connecting shaft part 20.
In some embodiments, elastic portion 46 includes two elastic pieces 461, and each 461 opposite end of elastic piece is fixed respectively
First connecting portion 42 and second connecting portion 44 are connected to, and the separate direction bending to each other of two elastic pieces 461, so that when rigid
Degree adjusts elastic piece 40 when being compressed because of both ends stress, and flexible deformation occurs two elastic pieces for separate direction and curved to each other
It is bent.In this way, two elastic pieces 461 are non-interference in flexible deformation phase, deformation is synchronized, and elastic-restoring force is easily controllable, is not easy
Damage, long service life.Optionally, the middle part of two elastic pieces 461 separate direction bending to each other.
Specific in implementation, stiffness tuning elastic piece 40 can be integrally formed using 3D printing.In other embodiments, just
Degree, which adjusts elastic piece 40, can also be used the integrated molding of the techniques such as machine cut, casting.
Please also refer to Fig. 4, in some embodiments, the inner wall forming of the first connecting shaft part 10 has the axis along the second connecting shaft part 20
The first groove 12 that line direction extends.It the one end of first connecting portion 42 far from second connecting portion 44 can around the axis of the first groove 12
It is rotationally embedded in the first groove 12.
The circumferential side wall of second connecting shaft part 20 is formed with the second groove 22 of the axis direction extension along the second connecting shaft part 20.
The one end of second connecting portion 44 far from first connecting portion 42 is rotatably inserted into the second groove 22 around the axis of the second groove 22
It is interior.
In this way, being rotatably connected for stiffness tuning elastic piece 40 and the first connecting shaft part 10 and the second connecting shaft part 20 is realized,
Enable in actual application stiffness tuning elastic piece 40 swing, thus near equipoise and equipoise
With negative torsion stiffness, and then the positive torsion Stiffness with positive rigidity elastic piece 30, it is carried out with the overall stiffness to shaft coupling
It adjusts, it is ensured that in static balance state, zero torsion stiffness is presented in shaft coupling, and small torsion is presented in shaft coupling near equilbrium position
Rigidity.Therefore, shaft coupling have high Static stiffness, low dynamic stiffness feature, it can be achieved that shafting ultralow frequency twisting vibration isolation.
Specific in embodiment, the cross section of the first groove 12 is in the circle with the first opening.First connecting portion 42
One end has the first cylindrical portion 422 (see Fig. 3) that the axis direction along the second connecting shaft part 20 extends, and the first cylindrical portion 422 is embedded
In in the first groove 12.The other end of first connecting portion 42 is stretched out by the first opening and is connect with elastic portion 46.
The cross section of second groove 22 is in the circle with the second opening.One end of second connecting portion 44 has to be connected along second
The second cylindrical portion 442 that the axis direction of shaft member 20 extends (see Fig. 3).Second cylindrical portion 442 is embedded in the second groove 22, the
The other end of two interconnecting pieces 44 is stretched out by the second opening and is connect with elastic portion 46.In this way, in assembly stiffness tuning elastic piece 40
When, only the first cylindrical portion 422 need to be directed at the first groove 12, the second cylindrical portion 442 is directed to one end of the second groove 22, then
Synchronous insertion, that is, complete the assembly of stiffness tuning elastic piece 40, assembling process is simple to operation, does not need by assembler
Tool.
In the embodiment of the present invention, positive rigidity elastic piece 30 is with stiffness tuning elastic piece 40 along the circumferential direction of the second connecting shaft part 20
It arranges alternately and at equal intervals.In this way, making positive rigidity elastic piece 30 and stiffness tuning elastic piece 40 to the first connecting shaft part 10 and
The power that two connecting shaft parts 20 apply reaches dynamic balance in radial directions, prevents from leading to the first connecting shaft part 10 because of radial force unevenness
With the center axis deviation of the second connecting shaft part 20.
Specific in embodiment shown in FIG. 1, positive rigidity elastic piece 30 includes three, and stiffness tuning elastic piece 40 includes three
A, positive rigidity elastic piece 30 replaces along the circumferential direction of the second connecting shaft part 20 with stiffness tuning elastic piece 40 and arranges at equal intervals.
It is understood that the number of positive rigidity elastic piece 30 and stiffness tuning elastic piece 40 needs to bear according to shaft coupling
The size of torque determine.If desired the torque born is big, then needs that more positive rigidity elastic piece 30 and stiffness tuning is arranged
Elastic piece 40.If desired the torque born is small, then settable less positive rigidity elastic piece 30 and stiffness tuning elastic piece 40.
In the embodiment of the present invention, the first connecting shaft part 10, the second connecting shaft part 20 and positive rigidity elastic piece 30 are integrally formed.Into
One step reduces the components of quasi- zero stiffness yielding coupling, simplifies processing and assembling process.
Specific in embodiment, the first connecting shaft part 10, the second connecting shaft part 20 and positive rigidity elastic piece 30 use 3D printing one
It is body formed.In this way, processing and manufacturing is simple.In other embodiments, the first connecting shaft part 10, the second connecting shaft part 20 and positive rigidity elasticity
The preparation of the techniques such as machine cut, casting can also be used in piece 30.
In the embodiment of the present invention, the first connecting shaft part 10, the second connecting shaft part 20, positive rigidity elastic piece 30 and stiffness tuning bullet
The material of property piece 40 can be the same or different, all can be metal may be nonmetallic.It is not limited thereto.It is optional
Ground, the first connecting shaft part 10, the second connecting shaft part 20, positive rigidity elastic piece 30 and stiffness tuning elastic piece 40 material can be used it is high tired
Labor strength alloys steel.
Continuing with referring to fig. 2, in the embodiment of the present invention, quasi- zero stiffness yielding coupling further includes being fixedly connected on first
The axis installation part 50 of connecting shaft part 10, axis installation part 50 for driving shaft or driven shaft to be fixedly mounted so that the first connecting shaft part 10 with
Driving shaft or driven shaft rotate synchronously.In this way, facilitating the fixed installation of the first connecting shaft part 10 and driving shaft or driven shaft.
In some embodiments, axis installation part 50 is locked by threaded fastener in the side of the first connecting shaft part 10, and
It is coaxially disposed with the first connecting shaft part 10.
Specific in embodiment, axis installation part 50 is in the form of annular discs, and threaded fastener includes multiple, and along axis installation part 50
It is circumferential to arrange at equal intervals.
Optionally, threaded fastener can be screw bolt and nut, can also be screw.
Fig. 5 is referred to, Fig. 5 is corner-torque curve of quasi- zero stiffness yielding coupling of the invention, wherein abscissa
For the angle that the first connecting shaft part 10 and the second connecting shaft part 20 relatively rotate, unit is " rad "；Zero stiffness elasticity joins subject to ordinate
The torque that axis device is born, unit are " Nmm ".From figure 5 it can be seen that the first connecting shaft part 10 and the second connecting shaft part 20 are opposite
Quasi- zero stiffness yielding coupling reaches static balance state, and the curve near static balance state when rotational angle is 0.2rad
Very flat, i.e., the torque variable quantity that quasi- zero stiffness yielding coupling is born is small, and torque transfer is stablized, and is typical Gao Jinggang
Degree, low dynamic stiffness characteristic.Show, quasi- zero stiffness yielding coupling of the invention have simultaneously can transmit large driving force square and
Good isolation twisting vibration performance.
Fig. 6 is referred to, Fig. 6 is the torsion stiffness curve graph of quasi- zero stiffness yielding coupling of the invention.Wherein abscissa
For the angle that the first connecting shaft part 10 and the second connecting shaft part 20 relatively rotate, unit is " rad "；Zero stiffness elasticity joins subject to ordinate
The torsion stiffness of axis device, unit are " Nmm/rad ".As can be seen that in 20 opposite turns of the first connecting shaft part 10 and the second connecting shaft part
It moves quasi- zero stiffness yielding coupling when angle is 0.2rad and reaches static balance state, at this point, quasi- zero stiffness yielding coupling is whole
Body rigidity is zero；Curve is relatively flat near static balance state, and overall stiffness is relatively low；It also shows, standard zero of the invention
Rigidity yielding coupling has can transmit large driving force square and good isolation twisting vibration performance simultaneously.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. quasi- zero stiffness yielding coupling characterized by comprising
First connecting shaft part, in a ring；
Second connecting shaft part is located in the first connecting shaft part, and is coaxially disposed with the first connecting shaft part；
One end of at least two positive rigidity elastic pieces, each positive rigidity elastic piece is fixedly connected on the first connecting shaft part,
The other end is fixedly connected on the second connecting shaft part；
At least two stiffness tuning elastic pieces, one end of each stiffness tuning elastic piece is around being parallel to the second connecting shaft part
The first axle of axis be rotatably connected at the first connecting shaft part, the other end is around the axis for being parallel to the second connecting shaft part
The second axis of line is rotatably connected at the second connecting shaft part；
The central plane that the first axle and the second axis are formed, the relatively described second axis and the second connecting shaft part
The sagittal plane that is formed of axis be in predetermined angle, when the relatively described first connecting shaft part of the second connecting shaft part is to preset direction
In rotary course, the first connecting shaft part and the second connecting shaft part apply compression to the stiffness tuning elastic piece respectively,
So that the stiffness tuning elastic piece is swingable to equipoise；When the stiffness tuning elastic piece is in the static balance position
When setting, the central plane is coplanar with the sagittal plane.
2. quasi- zero stiffness yielding coupling according to claim 1, which is characterized in that each described positive rigidity elastic piece
Bending part is all had, and the bending part of each positive rigidity elastic piece is protruded to the same side.
3. quasi- zero stiffness yielding coupling according to claim 2, which is characterized in that the positive rigidity elastic piece is in " several "
Font.
4. quasi- zero stiffness yielding coupling according to claim 1, which is characterized in that the stiffness tuning elastic piece includes
First connecting portion, relative to the first connecting portion second connecting portion and be connected to the first connecting portion and it is described second connect
Elastic portion between socket part, the first connecting portion are rotatably connected at the first connecting shaft part, institute around the first axle
It states second connecting portion and is rotatably connected at the second connecting shaft part around the second axis.
5. quasi- zero stiffness yielding coupling according to claim 4, which is characterized in that the elastic portion includes two elasticity
Piece, the opposite end of each elastic piece are respectively fixedly connected in the first connecting portion and the second connecting portion, and two
The separate direction bending to each other of a elastic piece.
6. quasi- zero stiffness yielding coupling according to claim 4, which is characterized in that the inner wall of the first connecting shaft part at
Shape has the first groove of the axis direction extension along the second connecting shaft part；The first connecting portion is far from the second connecting portion
One end be rotatably inserted into first groove around the axis of first groove；
The circumferential side wall of the second connecting shaft part is formed with the second groove of the axis direction extension along the second connecting shaft part；Institute
It states the one end of second connecting portion far from the first connecting portion and is rotatably inserted into described around the axis of second groove
In two grooves.
7. quasi- zero stiffness yielding coupling according to claim 6, which is characterized in that the cross section of first groove is in
Circle with the first opening；One end of the first connecting portion has that the axis direction along the second connecting shaft part extends
One cylindrical portion, first cylindrical portion are embedded in first groove, and the other end of the first connecting portion is by described first
Opening is stretched out and is connect with the elastic portion.
8. quasi- zero stiffness yielding coupling according to claim 7, which is characterized in that the cross section of second groove is in
Circle with the second opening；One end of the second connecting portion has that the axis direction along the second connecting shaft part extends
Two cylindrical portions, second cylindrical portion are embedded in second groove, and the other end of the second connecting portion is by described second
Opening is stretched out and is connect with the elastic portion.
9. quasi- zero stiffness yielding coupling according to claim 1, which is characterized in that the positive rigidity elastic piece with it is described
Stiffness tuning elastic piece replaces along the circumferential direction of the second connecting shaft part and arranges at equal intervals.
10. quasi- zero stiffness yielding coupling according to any one of claims 1 to 9, which is characterized in that first connecting shaft
Part, the second connecting shaft part and the positive rigidity elastic piece are integrally formed using 3D printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936411.XA CN109099072B (en) | 2018-08-16 | 2018-08-16 | Quasi- zero stiffness yielding coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936411.XA CN109099072B (en) | 2018-08-16 | 2018-08-16 | Quasi- zero stiffness yielding coupling |
Publications (2)
| Publication Number | Publication Date |
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| CN109099072A CN109099072A (en) | 2018-12-28 |
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| CN111998025A (en) * | 2020-07-22 | 2020-11-27 | 同济大学 | Torsion quasi-zero rigidity vibration isolation structure with flexibility |
| CN113027968B (en) * | 2021-03-15 | 2022-10-28 | 中车青岛四方车辆研究所有限公司 | Quasi-zero-rigidity elastic node and construction method and construction device thereof |
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| CN104455199A (en) * | 2014-10-20 | 2015-03-25 | 湖南大学 | Torsion quasi-zero stiffness vibration isolator |
| CN105526270A (en) * | 2016-01-18 | 2016-04-27 | 西安交通大学 | Quasi-zero stiffness coupling |
| US10030731B1 (en) * | 2013-03-13 | 2018-07-24 | Hrl Laboratories, Llc | Assembly with negative torsional stiffness |
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| US10030731B1 (en) * | 2013-03-13 | 2018-07-24 | Hrl Laboratories, Llc | Assembly with negative torsional stiffness |
| CN104455199A (en) * | 2014-10-20 | 2015-03-25 | 湖南大学 | Torsion quasi-zero stiffness vibration isolator |
| CN105526270A (en) * | 2016-01-18 | 2016-04-27 | 西安交通大学 | Quasi-zero stiffness coupling |
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| 《准零刚度隔振器的研究进展综述》;柴凯等;《2017年全国声学设计与噪声振动控制工程学术会议论文集》;20171024;第72-78页 * |
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