CN108116529A - A kind of analysis method of motion - Google Patents
A kind of analysis method of motion Download PDFInfo
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- CN108116529A CN108116529A CN201711377143.4A CN201711377143A CN108116529A CN 108116529 A CN108116529 A CN 108116529A CN 201711377143 A CN201711377143 A CN 201711377143A CN 108116529 A CN108116529 A CN 108116529A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Abstract
The invention discloses a kind of analysis methods of motion, belong to mechanical mechanism field.The described method includes：Motion is analyzed, determines motion whether comprising bypass mechanism；If comprising bypass mechanism, motion is made of bypass mechanism and original mechanism；Bypass mechanism is used to that original mechanism to be driven to move by initial trace, and, bypass mechanism is 0 compared with the degree of freedom of original mechanism.The present invention is by analyzing motion, it determines if containing bypass mechanism, if contain bypass mechanism, then when analyzing the movement locus of motion, bypass mechanism can be removed, the movement locus of original mechanism is only analyzed, can so simplify the analytic process of motion movement locus.If not containing bypass mechanism in motion, then motion can regard original mechanism as in itself, can increase original mechanism bypass mechanism at this time as actuator, provide power to the movement of original mechanism, improve adaptability during motion application.
Description
Technical field
The present invention relates to mechanical mechanism field, more particularly to a kind of analysis method of motion.
Background technology
For being capable of for the mechanical mechanism of self-movement, including multiple components mutually constrained, multiple component synergisms
Effect, to assign the mechanism specific movement locus.It is analyzed by the movement locus to mechanism, is better understood when the machine
The mechanism of structure.
In the prior art, the motion process of multiple components while in analysis institution, to determine the movement locus of the mechanism.
Inventor has found the prior art, and at least there are following technical problems：
When mechanism includes a fairly large number of component, the analytic process of movement locus is numerous and diverse.
The content of the invention
An embodiment of the present invention provides a kind of analysis methods of motion, can solve above-mentioned technical problem.Particular technique
Scheme is as follows：
A kind of analysis method of motion is provided, the described method includes：Motion is analyzed, is determined described
Whether motion includes bypass mechanism；
If comprising the bypass mechanism, the motion is made of the bypass mechanism and original mechanism；
The bypass mechanism for the original mechanism to be driven to be moved by initial trace, and, the bypass mechanism compared with
The degree of freedom of the original mechanism is 0.
In a kind of possible design, the motion includes the bypass mechanism, when the analysis motion
During movement locus, the movement locus of the original mechanism is analyzed.
In a kind of possible design, the motion does not include the bypass mechanism, and the motion is added
The bypass mechanism, the motion is as original mechanism；
Using the bypass mechanism original mechanism is driven to move.
It is described that motion is analyzed in a kind of possible design, determine the motion whether comprising side
Road mechanism, including：
Determine the engine base of the motion；
Multiple clamp mechanisms that one end is connected with the engine base are determined from the motion；
Using each described clamp mechanism as default bypass mechanism, the motion removes the default bypass mechanism
Part is as default original mechanism；
Degree of freedom of the default bypass mechanism compared with corresponding default original mechanism is calculated respectively, if the degree of freedom
For 0, then the default bypass mechanism is determined as target bypass mechanism, it is determined that the motion includes bypass mechanism.
It is described to calculate the default bypass mechanism compared with corresponding default original mechanism in a kind of possible design
Degree of freedom, including：
Determine the number of components that the default bypass mechanism is included；
Determine the kinematic pair of the connecting pin of each component in the default bypass mechanism；
If the default bypass mechanism is plane mechanism, the degree of freedom=number of components * 3- are each described
The sum of degree of freedom that kinematic pair is constrained；
If the default bypass mechanism is space mechanism, the degree of freedom=number of components * 6- are each described
The sum of degree of freedom that kinematic pair is constrained.
In a kind of possible design, when the motion is hood hinge, the hood hinge bag
It includes：Pedestal；
Lower end and the first hinged rod piece of the pedestal；
Lower end and the second hinged rod piece of the pedestal；
3rd rod piece hinged with the upper end of first rod piece and second rod piece simultaneously；
Lower end is connected with the pedestal by cylindrical pair, and upper end passes through the secondary gas spring structure being connected of ball with the 3rd rod piece
Part；
The gas spring component includes：By sliding secondary the first gas spring and the second gas spring connected from bottom to top；
The hood hinge is analyzed, determines whether the hood hinge includes bypass mechanism, including：
It is engine base to determine the pedestal；
First rod piece, second bar that one end is connected with the engine base are determined from the hood hinge
Part, the gas spring component；
Respectively using first rod piece, second rod piece, the gas spring component as default bypass mechanism, the hair
Dynamic hood hinge removes the part of the default bypass mechanism as default original mechanism；
First rod piece, second rod piece, the gas spring component are calculated respectively compared with corresponding default original
The degree of freedom of mechanism；
When the gas spring component is as default bypass mechanism, the gas spring component is compared with corresponding default original
The degree of freedom of mechanism is 0, at this point, determining the bypass mechanism that the gas spring component is the hood hinge.
In a kind of possible design, when the movement locus to the hood hinge is analyzed, from the hair
Dynamic hood hinge removes the gas spring component, by the pedestal, first rod piece, second rod piece, the 3rd bar
The entirety that part cooperation is formed only analyzes the movement locus of the original mechanism as original mechanism.
In a kind of possible design, when the motion is automobile front suspension, the automobile front suspension includes：Turn
To machine body, subframe, turn to interior bar, turning machine pull rod, control arm, knuckle, the first traveller, the second traveller, fixed point, steady
Determine part；
The turning machine body is rigid connection with the subframe；
The steering interior bar is connected with the turning machine body by sliding pair, and the steering interior bar is drawn with the turning machine
Bar is connected by universal joint, and the turning machine pull rod is connected with the knuckle by the way that ball is secondary；
The control arm is connected with the subframe by revolute, and the control arm is secondary even by ball with the knuckle
It connects；
The knuckle is rigid connection with first traveller, and first traveller passes through sliding with second traveller
Pair connection, second traveller are connected with the fixed point by the way that ball is secondary；
The stabilizing member includes：Stabiliser bar connected in sequence and connecting rod, the stabiliser bar pass through rotation with the subframe
Turn secondary connection, the stabiliser bar is connected with the connecting rod by universal joint, and the connecting rod passes through ball with first traveller
Pair connection；
The automobile front suspension is analyzed, determines whether the automobile front suspension includes bypass mechanism, including：
Determine the generally engine base that the turning machine body, the subframe, the fixed point are formed；
Determine that one end was connected with the engine base described turns to interior bar, the control arm, institute from the automobile front suspension
State the second traveller, the stabilizing member；
Respectively using the steering interior bar, the control arm, second traveller, the stabilizing member as default bypass machine
Structure, the automobile front suspension remove the part of the default bypass mechanism as default original mechanism；
The steering interior bar, the control arm, second traveller, the stabilizing member are calculated respectively compared with corresponding pre-
If the degree of freedom of original mechanism；
When the stabilizing member is as default bypass mechanism, the stabilizing member compared with corresponding default original mechanism from
By spending for 0, at this point, determining the bypass mechanism that the stabilizing member is the automobile front suspension.
In a kind of possible design, when the movement locus to the automobile front suspension is analyzed, from the automobile
Front suspension removes the stabilizing member, the automobile front suspension is removed the remainder of the stabilizing member as prototype structure, only
Analyze the movement locus of the prototype structure.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
By analyzing motion, determine if containing bypass mechanism, the definition based on bypass mechanism, it is known that
It is used to that original mechanism to be driven to move by initial trace, and, bypass mechanism is 0 compared with the degree of freedom of the original mechanism.It can
See, according to the condition, such as if it is determined that obtaining containing bypass mechanism in motion, then in the movement locus of analysis motion
When, bypass mechanism can be removed, the movement locus of original mechanism is only analyzed, can so simplify motion movement locus
Analytic process.In addition, based on bypass mechanism compared with the degree of freedom of original mechanism for 0, original mechanism is driven by bypass mechanism,
So if not containing bypass mechanism in motion, then motion can regard original mechanism as in itself, not change original at this time
On the basis of the movement locus of beginning mechanism, bypass mechanism can be increased original mechanism as actuator, the movement to original mechanism
Power is provided, improves adaptability during motion application.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is structure diagram when motion provided in an embodiment of the present invention is hood hinge mechanism；
Fig. 2 is structure diagram when motion provided in an embodiment of the present invention is front overhang frame mechanism.
Reference numeral represents respectively：
A- pedestals,
The first rod pieces of b-,
The second rod pieces of c-,
The 3rd rod pieces of d-,
E- gas spring components,
The first gas springs of e1-,
The second gas springs of e2-,
A- turning machine bodies,
B- subframes,
C- turns to interior bar,
D- turning machine pull rods,
E- control arms,
F- knuckles,
The first travellers of G-,
The second travellers of H-,
I- fixed points,
J- stabilizing members,
J1- stabiliser bars,
J2- connecting rods.
Specific embodiment
Unless otherwise defined, all technical terms used in the embodiment of the present invention are respectively provided with usual with those skilled in the art
The identical meaning understood.To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to this hair
Bright embodiment is described in further detail.
An embodiment of the present invention provides a kind of analysis method of motion, this method includes：Motion is divided
Whether analysis determines motion comprising bypass mechanism；If comprising bypass mechanism, motion is by bypass mechanism and original mechanism
Composition.Wherein, bypass mechanism is used to that original mechanism to be driven to move by initial trace, and, bypass mechanism is compared with original mechanism
Degree of freedom is 0.
Method provided in an embodiment of the present invention by analyzing motion, determined if containing bypass mechanism,
Definition based on bypass mechanism, it is known that it is used to that original mechanism to be driven to move by initial trace, and, bypass mechanism is compared with described
The degree of freedom of original mechanism is 0.As it can be seen that according to the condition, such as if it is determined that obtaining containing bypass mechanism in motion, then dividing
When analysing the movement locus of motion, bypass mechanism can be removed, only analyzes the movement locus of original mechanism, it so being capable of letter
Change the analytic process of motion movement locus.
In addition, based on bypass mechanism compared with the degree of freedom of original mechanism for 0, original mechanism is driven by bypass mechanism,
So if not containing bypass mechanism in motion, then motion can regard original mechanism as in itself, not change original at this time
On the basis of the movement locus of beginning mechanism, bypass mechanism can be increased original mechanism as actuator, the movement to original mechanism
Power is provided, improves adaptability during motion application.
In the embodiment of the present invention, motion includes：Always fixed engine base and it is arranged on multiple on engine base
Movable part, wherein, for motion, driving link (component of active movement), driven is contained in multiple movable parts
Part (driven component).Motion carries out the condition that movement possesses：The degree of freedom of motion be greater than or equal to 1, and, fortune
The number of the driving link of motivation structure is equal to the number of the degree of freedom of motion.In embodiments of the present invention, bypass mechanism can be with
It is interpreted as driving link.
For the original motion trajectory of original mechanism, refer to the movement that original mechanism obtains under the driving of driving link
Track.That is, movement locus (i.e. original motion trajectory) of the original mechanism under the driving of its driving link drives with it in bypass mechanism
Under movement locus it is consistent.
Above-mentioned bypass mechanism is 0 compared with the degree of freedom of original mechanism, refers to bypass mechanism with original mechanism completely about
Beam (i.e. the two is mutually by Complete Bind each other), the movement relation of the two corresponds, when original mechanism does not move, bypass mechanism
It can not move, when bypass mechanism moves, original mechanism is driven to movement.
Effect of the bypass mechanism in the analysis of motion is given below and is elaborated：
If after analyzing motion, determine that motion includes bypass mechanism, when the movement of analysis motion
During track, the movement locus of original mechanism is analyzed.
It, can be from movement when analyzing the movement locus of motion for the motion for including bypass mechanism
Bypass mechanism is removed in mechanism (for example, bypass mechanism can be dismantled directly, alternatively, can also directly ignore bypass mechanism
In the presence of at this time actual dismounting can not be carried out to bypass mechanism), after removing bypass mechanism, the movement to remaining original mechanism
It is analyzed track.It specifically, can be by calculating the degree of freedom of original mechanism, to analyze the movement locus of original mechanism.
It further,, can be directly to its core by removing bypass mechanism when being improved optimization to motion
Original mechanism be improved, and the removal of bypass mechanism is not only convenient for intuitively observing the connection relation of original mechanism, and energy
Reduce workload.
Original mechanism can be driven to be moved by initial trace based on above-mentioned bypass mechanism, be analyzed when to motion,
When determining that motion does not include bypass mechanism, it can select to add bypass mechanism to motion, at this point, motion conduct
Original mechanism is moved using bypass mechanism driving original mechanism.
It is moved using bypass mechanism driving original mechanism, in the movement locus and its premise of effect for not changing original mechanism
Under, provide power for the movement of original mechanism.So operation changes the power source of original mechanism, for the original of inconvenience driving
Beginning mechanism, increases the bypass mechanism convenient for driving, and the movement for making original mechanism is more convenient.Also, according to onsite application demand, choosing
The driving link selected driving bypass mechanism and then original mechanism is driven to move or directly drive original mechanism transports original mechanism
It is dynamic, increase the diversity of selection, expand the scope of application of original mechanism.
It can be seen from the above, bypass mechanism has great importance for the analytic process for simplifying motion, and it is above-mentioned
Refer to, bypass mechanism for original mechanism to be driven to be moved by initial trace, and, bypass mechanism compared with original mechanism degree of freedom
For 0, it is seen then that when determining bypass mechanism, can be determined according to above-mentioned condition.It specifically, can be according to following methods
Determine motion whether comprising bypass mechanism：
Determine the engine base of motion.
Multiple clamp mechanisms that one end is connected with engine base are determined from motion.
Using each clamp mechanism as default bypass mechanism, motion removes the part of default bypass mechanism as default
Original mechanism.
Degree of freedom of the default bypass mechanism compared with corresponding default original mechanism is calculated respectively, if degree of freedom is 0, in advance
If bypass mechanism is determined as target bypass mechanism, at this point, can determine that motion includes bypass mechanism.
Pass through above-mentioned steps, it may be determined that whether comprising bypass mechanism in motion, simplify the analysis of motion.Also
It can be increased newly by regarding the mechanism for meeting above-mentioned condition as bypass mechanism in motion, the movement of drive motion mechanism.
In the embodiment of the present invention, the engine base of motion refers to：Motion is during the motion, stationary always
Component, it is seen then that engine base be always during exercise other components provide support.
Multiple clamp mechanisms that one end is connected with engine base are determined from motion, refers to and has been found out in motion
And only one end is connected to the clamp mechanism on engine base, which can be individual component, or multiple components are formed
Assembly.
After treating that above-mentioned multiple clamp mechanisms determine, respectively using each clamp mechanism as default bypass mechanism, i.e. assuming that its
For bypass mechanism, at this point, removing the default bypass mechanism from motion, remaining part can be used as corresponding default original
Beginning mechanism.Then, degree of freedom of the default bypass mechanism compared with corresponding default original mechanism is calculated.Specifically, preset
Bypass mechanism can be calculated compared with the degree of freedom of default original mechanism by following methods：
Determine the number of components that default bypass mechanism is included.
Determine the kinematic pair of the connecting pin of each component.
If default bypass mechanism is plane mechanism, each kinematic pair institutes of above-mentioned degree of freedom=number of components * 3- are about
The sum of degree of freedom of beam.
If default bypass mechanism is space mechanism, each kinematic pair institutes of above-mentioned degree of freedom=number of components * 6- are about
The sum of degree of freedom of beam.
By above-mentioned computational methods, degree of freedom of the default bypass mechanism compared with default original mechanism can be calculated, with
Determine default bypass mechanism whether be necessary being bypass mechanism, that is, target bypass mechanism.It is it is understood that above-mentioned
Plane mechanism refer to that default bypass mechanism moves in a plane.
Above-mentioned space mechanism refers to that default bypass mechanism moves in space.
For motion, the kinematic pair of each component connecting pin, and each type of fortune are would know that by observation
The number for the degree of freedom that dynamic pair is constrained is known and definite.For example, in plane mechanism, when kinematic pair is is hinged,
It limits two degree of freedom.
The sum of degree of freedom that each kinematic pair is constrained refers to the number for the degree of freedom for being constrained each kinematic pair
Summation is added, kinematic pair is calculated and constrains how many a degree of freedom altogether.
In plane mechanism, each component has three degree of freedom, is respectively：X, y, θ, respectively represent move along the x-axis away from
From, move along y-axis with a distance from, the angle that rotates.Therefore, bypass mechanism is preset when not constrained be subject to kinematic pair, total
Number of degrees of freedom=number of components * 3.
In space mechanism, each component has 6 degree of freedom, is respectively x, y, z, a, b, c, represents to move along the x-axis respectively
Distance, the distance moved along y-axis, the distance being moved along the z-axis, around the rotational angle of x-axis, around the rotational angle of y-axis, around z-axis
Rotational angle.Therefore, bypass mechanism is preset when not constrained be subject to kinematic pair, total number of degrees of freedom=number of components
Mesh * 6.
Therefore, when calculating the degree of freedom of default bypass mechanism, its total number of degrees of freedom, when not suffering restraints need to only be used
Mesh subtracts the number of degrees of freedom of constraint of kinematic pair.
If default bypass mechanism is plane mechanism, degree of freedom=each kinematic pairs of number of components * 3- constrained from
By the sum of degree；
If default bypass mechanism is space mechanism, degree of freedom=each kinematic pairs of number of components * 6- constrained from
By the sum of degree.
The analysis method of motion provided by the invention will be illustrated by specific embodiment below：
As a kind of example：
As shown in Figure 1, when motion is hood hinge, hood hinge includes：Pedestal a；
Lower end and the first hinged pedestal a rod piece b；
Lower end and the second hinged pedestal a rod piece c；
3rd rod piece d hinged with the upper end of the first rod piece b and the second rod piece c simultaneously；
Lower end is connected with pedestal a by cylindrical pair, and upper end passes through the secondary gas spring component e being connected of ball with the 3rd rod piece d；
Gas spring component e includes：By sliding the first gas spring e1 and the second gas spring that secondary connection connects from bottom to top
e2。
Hood hinge is analyzed, determines whether hood hinge includes bypass mechanism, including：
It is engine base to determine pedestal a.
The first rod piece b, the second rod piece c, the gas spring component e that one end is connected with engine base are determined from hood hinge.
Respectively using the first rod piece b, the second rod piece c, gas spring component e as default bypass mechanism, hood hinge removes
The part of default bypass mechanism is gone to as default original mechanism.
Calculate respectively the first rod piece b, the second rod piece c, gas spring component e compared with corresponding default original mechanism freedom
Degree.
When gas spring component e is as default bypass mechanism, gas spring component e is compared with corresponding default original mechanism
Degree of freedom is 0, at this point, determining the bypass mechanism that gas spring component e is hood hinge.
Due to hood hinge at work, pedestal a is fixed on vehicle body, therefore, pedestal a is determined as engine base.So
Determine that the sub- component that one end is connected with engine base is respectively afterwards：First rod piece b, the second rod piece c, gas spring component e.
Using the first rod piece b as default bypass mechanism, and it is plane mechanism, calculates the first rod piece b compared with correspondence
Default original mechanism degree of freedom, in plane mechanism, hingedly constrain two degree of freedom：
Fb=3*1-2*2=-1, relative freedom are not 0.
Using the second rod piece c as default bypass mechanism, and it is plane mechanism, calculates the second rod piece c compared with correspondence
Default original mechanism degree of freedom, in plane mechanism, hingedly constrain two degree of freedom：
Fc=3*1-2*2=-1, relative freedom are not 0.
Using gas spring component e as default bypass mechanism, and it (is deposited based on cylindrical pair and ball are secondary for space mechanism
), degree of freedom of the gas spring component e compared with corresponding default original mechanism is calculated, in space mechanism, slides secondary constraint 5
Degree of freedom, cylindrical pair constrain 4 degree of freedom, ball 3 degree of freedom of secondary constraint：
Fe=6*2-5*1-4*1-3*1=0, relative freedom 0.
It was therefore concluded that：Gas spring component e can be as the bypass mechanism in hood hinge mechanism.
Based on above-mentioned, when the movement locus to hood hinge is analyzed, degassing bullet is removed from hood hinge
Spring component e, the entirety that the first rod piece b, the second rod piece c, the 3rd rod piece d, pedestal a cooperations are formed is as original mechanism, analysis
The movement locus of original mechanism.
By the removing gas spring component e from hood hinge, calculation amount when analyzing original mechanism is reduced,
Convenient for optimizing to original mechanism, improving.
As another example：
As shown in Figure 2, when motion is automobile front suspension, automobile front suspension includes：Turning machine body A, secondary vehicle
Frame B, interior bar C, turning machine pull rod D, control arm E, knuckle F, the first traveller G, the second traveller H, fixed point I, stabilizing member are turned to
J。
Wherein, turning machine body A and subframe B is rigid connection.
It turns to interior bar C to be connected by sliding pair with turning machine body A, turns to interior bar C and turning machine pull rod D and pass through universal joint
Connection, turning machine pull rod D are connected with knuckle F by the way that ball is secondary.
Control arm E is connected with subframe B by revolute, and control arm E is connected with knuckle F by the way that ball is secondary.
Knuckle F and the first traveller G is rigid connection, and the first traveller G is connected with the second traveller H by sliding pair, second
Traveller H is connected with fixed point I by the way that ball is secondary.
Stabilizing member J includes stabiliser bar J1 connected in sequence and connecting rod J2, and stabiliser bar J1 and subframe B is connected by revolute
It connects, stabiliser bar J1 is connected with connecting rod J2 by universal joint, and connecting rod J2 is connected with the first traveller G by the way that ball is secondary.
Automobile front suspension is analyzed, determines whether automobile front suspension includes bypass mechanism, including：
Determine the generally engine base that turning machine body A, subframe B, fixed point I are formed.
What definite one end was connected with engine base from automobile front suspension turns to interior bar C, control arm E, the second traveller H, stabilizing member
J。
Interior bar C, control arm E, the second traveller H, stabilizing member J will be turned to respectively as default bypass mechanism, institute's front overhang
Frame removes the part of default bypass mechanism as default original mechanism.
It calculates respectively and turns to interior bar C, control arm E, the second traveller H, stabilizing member J compared with corresponding default original mechanism
Degree of freedom.
When stabilizing member J is as default bypass mechanism, stabilizing member J is compared with the degree of freedom of corresponding default original mechanism
0, at this point, determining that gas spring component stability part J is target bypass mechanism.
In automobile front suspension motion process, turning machine body A, subframe B, fixed point E are fixed, by turning machine body
A, the engine base of subframe B, fixed point E as front overhang frame mechanism.
Determine steering interior bar C, control arm E, the second traveller H, stabilizing member J that one end is connected with engine base.
Interior bar C will be turned to as default bypass mechanism, calculate turn to interior bar C compared with corresponding default original mechanism from
By spending, in space mechanism, 5 degree of freedom of secondary constraint are slid, universal joint constrains 4 degree of freedom：
FC=6*1-5*1-4*1=-3, relative freedom are not 0.
Using control arm E as default bypass mechanism, freedom of the control arm E compared with corresponding default original mechanism is calculated
It spends, in space mechanism, revolute constrains 5 degree of freedom, ball 3 degree of freedom of secondary constraint：
FE=6*1-5*1-3*1=-2, relative freedom are not 0.
Using the second traveller H as default bypass mechanism, calculate the second traveller H compared with corresponding default original mechanism from
By spending, in space mechanism, 5 degree of freedom of secondary constraint, ball 3 degree of freedom of secondary constraint are slid：
FH=6*1-5*1-3*1=-2, relative freedom are not 0.
Using stabilizing member J as default bypass mechanism, freedom of the stabilizing member J compared with corresponding default original mechanism is calculated
It spends, in space mechanism, revolute constrains 5 degree of freedom, and universal joint constrains 4 degree of freedom, ball 3 degree of freedom of secondary constraint：
FJ=6*2-5*1-4*1-3*1=0, relative freedom 0.
It was therefore concluded that stabilizing member J can be as the bypass mechanism in front overhang frame mechanism.
Based on above-mentioned, when the movement locus to automobile front suspension is analyzed, stabilizing member J is removed from automobile front suspension,
Automobile front suspension is removed into the remainder of stabilizing member J as prototype structure, analyzes the movement locus of prototype structure.
By from automobile front suspension remove stabilizing member J, reduce calculation amount when analyzing original mechanism, convenient for pair
Original mechanism optimization, improvement etc..
Above-mentioned two embodiment provides the specific steps that bypass mechanism is judged from motion, utilizes the judgement side
Method can also increase original mechanism bypass mechanism as actuator.The mechanism increased need to only meet above-mentioned decision condition, i.e.,
It may make up bypass mechanism.
For example, when increasing mechanism newly as bypass mechanism in motion, one end of newly-increased mechanism is connected first
On pedestal, the other end is connected on the movable part of motion.Then by determining each component connecting pin of newly-increased mechanism
Kinematic pair, make the sum of number of degrees of freedom of constraint of kinematic pair be equal to each component in newly-increased mechanism it is unfettered when total degree of freedom,
It is 0 to make to increase mechanism newly compared with the degree of freedom of motion, increases the decision condition that mechanism meets above-mentioned bypass mechanism newly at this time, can
It is added to as bypass mechanism in motion, does not influence the movement locus of motion.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modifications, equivalent replacements and improvements are made should be included in protection scope of the present invention
Within.
Claims (9)
1. a kind of analysis method of motion, which is characterized in that the described method includes：Motion is analyzed, is determined
Whether the motion includes bypass mechanism；
If comprising the bypass mechanism, the motion is made of the bypass mechanism and original mechanism；
The bypass mechanism is used to that the original mechanism to be driven to move by initial trace, and, the bypass mechanism is compared with described
The degree of freedom of original mechanism is 0.
2. according to the method described in claim 1, it is characterized in that, the motion include the bypass mechanism, work as analysis
During the movement locus of the motion, the movement locus of the original mechanism is analyzed.
3. according to the method described in claim 1, it is characterized in that, the motion does not include the bypass mechanism, to institute
It states motion and adds the bypass mechanism, the motion is as original mechanism；
Using the bypass mechanism original mechanism is driven to move.
4. according to the method described in claim 1, it is characterized in that, described analyze motion, the movement is determined
Whether mechanism includes bypass mechanism, including：
Determine the engine base of the motion；
Multiple clamp mechanisms that one end is connected with the engine base are determined from the motion；
Using each described clamp mechanism as default bypass mechanism, the motion removes the part of the default bypass mechanism
As default original mechanism；
Degree of freedom of the default bypass mechanism compared with corresponding default original mechanism is calculated respectively, if the degree of freedom is 0,
Then the default bypass mechanism is determined as target bypass mechanism, it is determined that the motion includes bypass mechanism.
5. according to the method described in claim 4, it is characterized in that, described calculate the default bypass mechanism compared with corresponding
The degree of freedom of default original mechanism, including：
Determine the number of components that the default bypass mechanism is included；
Determine the kinematic pair of the connecting pin of each component in the default bypass mechanism；
If the default bypass mechanism is plane mechanism, the degree of freedom=number of components * 3- each movements
The sum of degree of freedom that pair is constrained；
If the default bypass mechanism is space mechanism, the degree of freedom=number of components * 6- each movements
The sum of degree of freedom that pair is constrained.
6. according to the method described in claim 5, it is characterized in that, when the motion be hood hinge when, it is described
Hood hinge includes：Pedestal (a)；
Lower end and the first hinged rod piece (b) of the pedestal (a)；
Lower end and the second hinged rod piece (c) of the pedestal (a)；
3rd rod piece (d) hinged with the upper end of first rod piece (b) and second rod piece (c) simultaneously；
Lower end is connected with the pedestal (a) by cylindrical pair, and upper end passes through the secondary gas spring being connected of ball with the 3rd rod piece (d)
Component (e)；
The gas spring component (e) includes：By sliding secondary the first gas spring (e1) and the second gas spring connected from bottom to top
(e2)；
The hood hinge is analyzed, determines whether the hood hinge includes bypass mechanism, including：
It is engine base to determine the pedestal (a)；
First rod piece (b), second rod piece that one end is connected with the engine base are determined from the hood hinge
(c), the gas spring component (e)；
Respectively using first rod piece (b), second rod piece (c), the gas spring component (e) as default bypass mechanism,
The hood hinge removes the part of the default bypass mechanism as default original mechanism；
First rod piece (b), second rod piece (c), the gas spring component (e) are calculated respectively compared with corresponding default
The degree of freedom of original mechanism；
When the gas spring component (e) is as default bypass mechanism, the gas spring component (e) is compared with corresponding default original
The degree of freedom of beginning mechanism is 0, at this point, determining the bypass mechanism that the gas spring component (e) is the hood hinge.
7. according to the method described in claim 6, the movement locus of the hood hinge is divided it is characterized in that, working as
During analysis, the gas spring component (e) is removed from the hood hinge, by the pedestal (a), first rod piece (b), institute
The second rod piece (c), the entirety of the 3rd rod piece (d) cooperation composition are stated as original mechanism, only analyzes the original mechanism
Movement locus.
8. according to the method described in claim 5, it is characterized in that, when the motion be automobile front suspension when, the vapour
Chinese herbaceous peony suspension includes：Turning machine body (A), subframe (B) turn to interior bar (C), turning machine pull rod (D), control arm (E), steering
Save (F), the first traveller (G), the second traveller (H), fixed point (I), stabilizing member (J)；
The turning machine body (A) is rigid connection with the subframe (B)；
The steering interior bar (C) is connected with the turning machine body (A) by sliding pair, described to turn to interior bar (C) and described turn
It is connected to machine pull rod (D) by universal joint, the turning machine pull rod (D) is connected with the knuckle (F) by the way that ball is secondary；
The control arm (E) is connected with the subframe (B) by revolute, and the control arm (E) is logical with the knuckle (F)
Cross the secondary connection of ball；
The knuckle (F) is rigid connection, first traveller (G) and second traveller (H) with first traveller (G)
By sliding secondary connection, second traveller (H) is connected with the fixed point (I) by the way that ball is secondary；
The stabilizing member (J) includes：Stabiliser bar (J1) connected in sequence and connecting rod (J2), the stabiliser bar (J1) and the pair
Vehicle frame (B) is connected by revolute, and the stabiliser bar (J1) is connected with the connecting rod (J2) by universal joint, the connecting rod
(J2) it is connected with first traveller (G) by the way that ball is secondary；
The automobile front suspension is analyzed, determines whether the automobile front suspension includes bypass mechanism, including：
Determine the generally engine base that the turning machine body (A), the subframe (B), the fixed point (I) are formed；
From the automobile front suspension determine one end be connected with the engine base it is described turn to interior bar (C), the control arm (E),
Second traveller (H), the stabilizing member (J)；
Respectively using the steering interior bar (C), the control arm (E), second traveller (H), the stabilizing member (J) as default
Bypass mechanism, the automobile front suspension remove the part of the default bypass mechanism as default original mechanism；
Calculate respectively it is described steering interior bar (C), the control arm (E), second traveller (H), the stabilizing member (J) compared with
The degree of freedom of corresponding default original mechanism；
When the stabilizing member (J) is as default bypass mechanism, the stabilizing member (J) is compared with corresponding default original mechanism
Degree of freedom is 0, at this point, determining the bypass mechanism that the stabilizing member (J) is the automobile front suspension.
9. according to the method described in claim 8, the movement locus of the automobile front suspension is analyzed it is characterized in that, working as
When, the stabilizing member (J) is removed from the automobile front suspension, the automobile front suspension is removed to the residue of the stabilizing member (J)
Component only analyzes the movement locus of the prototype structure as prototype structure.
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