CN102506122A - Gear rack type inertial container with variable inertial coefficient - Google Patents
Gear rack type inertial container with variable inertial coefficient Download PDFInfo
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- CN102506122A CN102506122A CN2011102957409A CN201110295740A CN102506122A CN 102506122 A CN102506122 A CN 102506122A CN 2011102957409 A CN2011102957409 A CN 2011102957409A CN 201110295740 A CN201110295740 A CN 201110295740A CN 102506122 A CN102506122 A CN 102506122A
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Abstract
A gear rack type inertial container with a variable inertial coefficient is characterized in that a guide groove is arranged on a flywheel of the inertial container, a mass block capable of freely and radially moving in the guide groove is nested in the guide groove, and a magnetic sleeve ring is arranged at the axis of the flywheel and can suck the mass block to a position close to the axis of the flywheel when being static. When a pair of external forces oppositely acts at two endpoints of the inertial container, a rack indirectly drives the flywheel fixed onto a box to rotate, and centrifugal force enables the mass block to radially move, so that the inertial coefficient changes along with the movement state, impact generated in instantaneous action of high load is relieved, the dead weight of the inertial container can be reduced, and the inertial container is simple and practicable in structure.
Description
Technical field
The present invention relates to a kind of case of being used to, refer in particular to the variable pinion and-rack of being used to the matter coefficient and be used to case.
Background technique
Chinese patent 200810123830.8 discloses a kind of pinion and-rack and has been used to container; Be gear rack inertial mass accumulator or gear rack inertia energy accumulator again; The same as the spring in the mechanical system with damper; This device need be not a reference system with the inertial coodinate system, is a kind of real two-end-point element.In new electromechanical analogy theory, replace traditional mass elements through adopting this device, make in machinery and the circuitry the strict equity of element of simulation mutually, thereby solved the difficult problem that electromechanical analogy is theoretical uses.This device can be widely used in the vibration isolation technique field, like directions such as vehicle suspension, train suspension, constructure shakeproof and the vibrations of absorption dynamic power machine.
Pinion and-rack is used to container and is made up of casing, flywheel, pinion shaft A, gearwheel, pinion shaft B and tooth bar; Its structural type is: tooth bar places in the guide groove of casing; Can carry out translation, tooth bar is meshed with pinion shaft B, and gearwheel links with pinion shaft B is coaxial; And be meshed with pinion shaft A, flywheel then links with gear shaft A is coaxial.Its working principle is: tooth bar and casing can be considered two end points being used to container, and when a pair of external force relativity during in two end points, tooth bar produces translation with respect to casing, drives each gear that is meshed and rotates, and finally drives the flywheel rotation.In this process, make the kinetic energy of two-end-point be converted into the potential energy of flywheel and store.
The kinetic equations that pinion and-rack is used to container does
, wherein
FExpression be applied to power on the two-end-point,
bThe expression be used to matter coefficient (its unit is kg),
With
The acceleration of expression two-end-point, being used to the matter coefficient can be calculated by the rotary inertia of rotary inertia, radius and the flywheel of gear train.According to kinetic equations, the size that changes flywheel and gear train just can obtain having the suitable pinion and-rack of being used to the matter coefficient and be used to container.
In application process, pinion and-rack is used to container owing to adopt even matter flywheel, and himself weight is bigger; And once design its to be used to the matter coefficient immutable; Especially under the momentary action of big load, because the internal mechanical action of inertia, be easy to generate instantaneous big impedance and transship.
Summary of the invention
To be used to the container own wt big in order to overcome pinion and-rack, and it is immutable to be used to the matter coefficient, is difficult to bear the deficiency of big load snap, and the present invention designs a kind of variable pinion and-rack of being used to the matter coefficient and is used to container, thereby overcomes the above problems.
The technical solution adopted for the present invention to solve the technical problems is: comprise casing, flywheel, pinion shaft A, gearwheel, pinion shaft B, tooth bar, guide groove, cylindrical body mass block and magnetic lasso; Tooth bar places translation in the guide rail on the casing; B is meshed with pinion shaft; Gearwheel is fixed on the casing with coaxial the linking of pinion shaft B, and is meshed with pinion shaft A, and flywheel then is fixed on the casing with coaxial the linking of pinion shaft A; Radially have cylindric guide groove on the flywheel, the cylindrical body mass block is nested in the interior freedom of guide groove and radially slides; The magnetic lasso is settled in axle center at flywheel, and the magnetic force of lasso is set to and can when flywheel is static, near the flywheel axle center, gets final product by the adsorbate gauge block; The bar number of the groove of convincing by patient analysis, and the weight of mass block is looked being used to the matter coefficient calculations of actual demands of engineering and is decided.
Different according to the nested mode of mass block and shape, patent of the present invention has other two kinds of concrete technological schemes.
Scheme one comprises casing, flywheel, pinion shaft A, gearwheel, pinion shaft B, tooth bar, guide groove, mass block and magnetic lasso.Tooth bar and casing can be considered two end points being used to container, and when a pair of active force acted on two end points being used to container, the relative casing of tooth bar produced translation, and drive each gear rotation that is meshed, and finally drive the flywheel rotation; In the time of the flywheel rotation, the mass block in the guide groove is in the radial motion of action of centrifugal force lower edge.
The characteristics of scheme one are, mass block is designed to the cuboid of cross section for " worker " font, and two grooves on its mass block form nested the cooperation with the interior two edges of flywheel upper rail, and mass block can be nested with at guide groove and radially slide.
Scheme two is different from scheme one part, mainly is in the guide groove of flywheel, radially settles little guide rod in guide groove symmetry axis position, and mass block is designed to hollow cylinder, and passes little guide rod and in guide groove, radially slide.
The invention has the beneficial effects as follows: when reducing the conventional gears rack-type and be used to container dead weight, the matter coefficient of being used to of being used to container is changed with the change of motion state, and can bear big load snap better in being used to the impact that container causes, simple for structure.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is that the variable pinion and-rack of being used to the matter coefficient is used to the container front schematic view.
Fig. 2 is the local schematic rear view of flywheel that comprises mass block.
Fig. 3 is " worker " font cuboid mass block and the nested cross sectional representation that cooperates of flywheel guide groove.
Fig. 4 is that the hollow cylinder mass block passes the nested cooperation schematic representation of little guide rod.
Among the figure, 1. casing, 2. tooth bar, 3. gearwheel, 4. pinion shaft B, 5. pinion shaft A, 6. flywheel, 7. guide groove, 8. mass block, the lasso that 9. has magnetic, 10. little guide rod.
Embodiment
In Fig. 1, tooth bar 2 is placed in the guide rail of casing 1, can carry out translation, and tooth bar 2 is two free relatively end points being used to container with casing 1.Tooth bar 2 is meshed with pinion shaft B4, pinion shaft B4 and gearwheel 3 coaxial being connected and fixed on the casing 1, and pinion shaft A5 and gearwheel 3 are meshed; Flywheel 6 is connected and fixed on the casing 1 with pinion shaft A5 is coaxial; On flywheel 6, leave four guide grooves 7, the length of guide groove 7 is less than flywheel 6 radiuses, and mass block 8 is placed in the guide groove 7; And carry out nested cooperation, mass block 8 can be radially slided along guide groove 7.
In Fig. 2, the axle center of flywheel 6 place settles the lasso with magnetic, guarantee when static can adsorbate gauge block 8 near the flywheel axle center.
If the tooth radius of pinion shaft B4 does
r 1 , the radius of gearwheel 3 does
r 2 , the radius of pinion shaft A5 does
r 3 , the rotary inertia of flywheel 6 does
J, quality does
mFor the explanation easy during, suppose that the quality of other assembly is ignored, bin movement speed
v 1 =0, the movement velocity of tooth bar does
v 2 , the power that acts on tooth bar does
F, be used to the matter coefficient and do
b, according to gear-driven movement characteristic, can obtain following relation:
According to being used to the dynamic (dynamical) definition of container, have
Can know that by formula (1) and formula (2) what pinion and-rack was used to container is used to the matter coefficient, for
Know by the definition of solid moment of inertia, the quality that it equals each particle in the rigid body and particle to spool the sum of products of perpendicular distance square, promptly
According to above derivation, can know that by formula (3) and formula (4) mass distribution that changes flywheel 6 can effectively improve the rotary inertia of flywheel, and then improve be used to container be used to the matter coefficient.
Conclusion below in conjunction with deriving is described further the present invention.
Through changing the method that flywheel 6 is improved quality and distributed, change the rotary inertia of flywheel 6, be used to the purpose that container is used to the matter coefficient thereby realize changing pinion and-rack.Through in the guide groove 7 of flywheel 6, settling the mass block 8 of radial motion; In flywheel 6 rotary courses; Because centrifugal action; Make mass block 8 away from axe movement to guide groove 7 outer rims, so just can when reducing flywheel 6 weight, realize increasing the effect of flywheel 6 rotary inertias through using less mass block 8.Settle magnetic lasso 9 at flywheel 6 axle center places, make that when static, mass block 8 is adsorbed on the axle center magnetic lasso 9; When big load snap when being used to container; Because mass block 8 is in shaft core position, this moment, flywheel 6 unitary rotation inertia were little, caused to be used to integral container to be used to the matter coefficient little; Bear big loading easily, alleviate the excessive overload that causes of internal mechanical effect of inertia.Rotation gradually along with flywheel 6; Because action of centrifugal force makes mass block 8 break away from 9 absorption of magnetic lasso, away from axe movement; In this process along with the change of the mass distribution of flywheel 6; Increase the rotary inertia of flywheel 6, thus increase that this is used to container be used to the matter coefficient, and reach the effect that the matter coefficient is used in progressively change.
Different according to the nested mode of mass block 8 and shape are explained two kinds of concrete technological schemes of patent of the present invention in conjunction with accompanying drawing.
In Fig. 3, mass block 8 is designed to the cuboid of cross section for " worker " font, and two grooves of mass block 8 are in two nested cooperations in edge of flywheel 6 upper rails 7, and mass block 8 can freely radially slide in guide groove 7 like this.
In Fig. 4, mass block 8 is designed to hollow cylinder, and radially settles little guide rod 10 at the symmetry axis place of guide groove 7, and mass block 8 passes little guide rod 10 and is placed in radially slip in the guide groove 7.
The flywheel that the present invention is used to container to pinion and-rack designs, and makes when reducing to be used to container dead weight, through changing the method that flywheel mass distributes, reaches the effect that changes Rotary Inertia of Flywheel.Like this, be used to being used to the matter coefficient and just can changing of container with the change of being used to the container motion state.Because when static, be used to container to be used to the matter coefficient lower, when big loading when being used to container, through design of the present invention, just can alleviate the excessive overload that causes of internal mechanical effect of inertia, improve the performance of being used to container, and method is simple.
Claims (5)
1. a variable pinion and-rack of being used to the matter coefficient is used to case, it is characterized in that: comprise casing (1), flywheel (6), pinion shaft (A5), gearwheel (3), pinion shaft (B4), tooth bar (2), guide groove (7), mass block (8) and magnetic lasso (9); Tooth bar (2) places translation in the guide rail on the casing (1); Same pinion shaft (B4) is meshed; Gearwheel (3) is fixed on the casing (1) with coaxial the linking of pinion shaft (B4), and is meshed with pinion shaft (A5), and flywheel (6) then is fixed on the casing (1) with coaxial the linking of pinion shaft (A5); Radially have guide groove (7) on the flywheel (6); Said four guide grooves (7) length is less than flywheel (6) radius, and mass block (8) radially is free to slide in guide groove (7), settles magnetic lasso (9) in the axle center of flywheel (6).
2. the variable pinion and-rack of being used to the matter coefficient according to claim 1 is used to case, it is characterized in that: the magnetic force of said magnetic lasso (9) is adsorbed on mass block (8) flywheel (6) axle center one end of guide groove (7) when flywheel is static.
3. the variable pinion and-rack of being used to the matter coefficient according to claim 1 and 2 is used to container, it is characterized in that: said guide groove (7) is for cylindric, and mass block (8) is a cylindrical body, and mass block (8) is nested in the guide groove (7) and radially is free to slide.
4. the variable pinion and-rack of being used to the matter coefficient according to claim 1 and 2 is used to container; It is characterized in that: said mass block (8) is the cuboid of " worker " font for cross section; Two grooves on the mass block (8) form nested the cooperation with the interior two edges that are provided with of flywheel upper rail, and mass block (8) radially is free to slide in guide groove (7).
5. the variable pinion and-rack of being used to the matter coefficient according to claim 1 and 2 is used to container; It is characterized in that: also comprise little guide rod (10); Little guide rod (10) is radially settled in the symmetry axis position of said guide groove (7); Mass block (8) is a hollow cylinder, and passes little guide rod, and mass block (8) radially is free to slide in guide groove (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102957409A CN102506122A (en) | 2011-10-08 | 2011-10-08 | Gear rack type inertial container with variable inertial coefficient |
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| CN2011102957409A CN102506122A (en) | 2011-10-08 | 2011-10-08 | Gear rack type inertial container with variable inertial coefficient |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401195A (en) * | 2014-11-14 | 2015-03-11 | 江苏大学 | Mechanical ball screw-type inerter device variable in inerter coefficient |
| CN104455203A (en) * | 2014-11-19 | 2015-03-25 | 江苏大学 | Inertial container with two-level adjustable inertial mass coefficients |
| CN105162278A (en) * | 2015-07-31 | 2015-12-16 | 中国人民解放军国防科学技术大学 | Mechanical and electronic inerter capable of actively controlling inertial mass coefficient and control method thereof |
| CN105626802A (en) * | 2016-03-09 | 2016-06-01 | 石家庄铁道大学 | Motion converter based on eccentric flywheel and vibration damper with motion converter |
| CN108674115A (en) * | 2018-04-17 | 2018-10-19 | 江苏大学 | A kind of slipper block connecting bar type variable comprising used matter coefficient is used to the ISD suspension systems of container |
| CN109025450A (en) * | 2018-09-07 | 2018-12-18 | 山东大学 | A kind of used matter vibration absorber of temperature control intelligent tuning |
| CN109707791A (en) * | 2019-01-30 | 2019-05-03 | 江苏大学 | A kind of used case of protecting against shock |
| CN109723779A (en) * | 2019-01-11 | 2019-05-07 | 南京理工大学 | Based on the used appearance of hydraulic continuous variable |
| CN110001418A (en) * | 2019-04-09 | 2019-07-12 | 凌飞 | A kind of simple and reliable electric vehicle increasing journey power supply system and increasing journey electric vehicle |
| CN110219938A (en) * | 2019-05-31 | 2019-09-10 | 河海大学 | A kind of adjustable used capacitance device of used capacity |
| CN110985626A (en) * | 2019-11-18 | 2020-04-10 | 河海大学 | Gear rack inertial container device with unidirectional rotation flywheel |
| CN111119257A (en) * | 2019-12-31 | 2020-05-08 | 青岛理工大学 | Pile top dynamic load simulation device and method |
| CN111237418A (en) * | 2020-01-15 | 2020-06-05 | 河海大学 | Driving ratio adjustable inerter device |
| CN112257194A (en) * | 2020-10-06 | 2021-01-22 | 大连理工大学 | Design method for inertia ratio self-adaptive adjustment inertia container |
| CN112594316A (en) * | 2020-12-17 | 2021-04-02 | 华中科技大学 | Inertial mass damping system with adjustable inertial mass coefficient |
| CN112855877A (en) * | 2021-01-28 | 2021-05-28 | 江苏大学 | Rotary inertia container for realizing inertia mass two-stage adjustment based on planetary gear mechanism |
| CN114763817A (en) * | 2021-01-14 | 2022-07-19 | 南京理工大学 | Inertial container device with rod type structure |
| CN115637638A (en) * | 2022-10-26 | 2023-01-24 | 哈尔滨工业大学 | Variable inertial mass semi-active tuned mass damper inertial container and frequency tuning method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067265A1 (en) * | 1981-06-12 | 1982-12-22 | Volkmann Eduard Haas | Method and device for storing kinetic energy in a rotary mass |
| JPH05215185A (en) * | 1991-04-09 | 1993-08-24 | Yan Tai-Haa | Flywheel structure of main driving or centrifugal-force linear slave driving |
| CN101327722A (en) * | 2008-06-05 | 2008-12-24 | 江苏大学 | Vehicle suspension fork with inertia energy accumulator |
-
2011
- 2011-10-08 CN CN2011102957409A patent/CN102506122A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067265A1 (en) * | 1981-06-12 | 1982-12-22 | Volkmann Eduard Haas | Method and device for storing kinetic energy in a rotary mass |
| JPH05215185A (en) * | 1991-04-09 | 1993-08-24 | Yan Tai-Haa | Flywheel structure of main driving or centrifugal-force linear slave driving |
| CN2146604Y (en) * | 1991-04-09 | 1993-11-17 | 杨泰和 | Dynamic flywheel |
| CN101327722A (en) * | 2008-06-05 | 2008-12-24 | 江苏大学 | Vehicle suspension fork with inertia energy accumulator |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401195A (en) * | 2014-11-14 | 2015-03-11 | 江苏大学 | Mechanical ball screw-type inerter device variable in inerter coefficient |
| CN104401195B (en) * | 2014-11-14 | 2016-08-24 | 江苏大学 | The ball screw type of the variable used appearance coefficient of machinery is used to container |
| CN104455203A (en) * | 2014-11-19 | 2015-03-25 | 江苏大学 | Inertial container with two-level adjustable inertial mass coefficients |
| CN105162278A (en) * | 2015-07-31 | 2015-12-16 | 中国人民解放军国防科学技术大学 | Mechanical and electronic inerter capable of actively controlling inertial mass coefficient and control method thereof |
| CN105162278B (en) * | 2015-07-31 | 2017-07-07 | 中国人民解放军国防科学技术大学 | It is a kind of can the used matter coefficient of active control electromechanics used container and its control method |
| CN105626802A (en) * | 2016-03-09 | 2016-06-01 | 石家庄铁道大学 | Motion converter based on eccentric flywheel and vibration damper with motion converter |
| CN108674115B (en) * | 2018-04-17 | 2019-11-05 | 江苏大学 | A kind of ISD suspension system for being used to container comprising being used to the variable slipper block connecting bar type of matter coefficient |
| CN108674115A (en) * | 2018-04-17 | 2018-10-19 | 江苏大学 | A kind of slipper block connecting bar type variable comprising used matter coefficient is used to the ISD suspension systems of container |
| CN109025450A (en) * | 2018-09-07 | 2018-12-18 | 山东大学 | A kind of used matter vibration absorber of temperature control intelligent tuning |
| CN109723779A (en) * | 2019-01-11 | 2019-05-07 | 南京理工大学 | Based on the used appearance of hydraulic continuous variable |
| CN109707791A (en) * | 2019-01-30 | 2019-05-03 | 江苏大学 | A kind of used case of protecting against shock |
| CN110001418A (en) * | 2019-04-09 | 2019-07-12 | 凌飞 | A kind of simple and reliable electric vehicle increasing journey power supply system and increasing journey electric vehicle |
| CN110219938A (en) * | 2019-05-31 | 2019-09-10 | 河海大学 | A kind of adjustable used capacitance device of used capacity |
| CN110985626A (en) * | 2019-11-18 | 2020-04-10 | 河海大学 | Gear rack inertial container device with unidirectional rotation flywheel |
| CN111119257A (en) * | 2019-12-31 | 2020-05-08 | 青岛理工大学 | Pile top dynamic load simulation device and method |
| CN111237418A (en) * | 2020-01-15 | 2020-06-05 | 河海大学 | Driving ratio adjustable inerter device |
| CN112257194A (en) * | 2020-10-06 | 2021-01-22 | 大连理工大学 | Design method for inertia ratio self-adaptive adjustment inertia container |
| CN112594316A (en) * | 2020-12-17 | 2021-04-02 | 华中科技大学 | Inertial mass damping system with adjustable inertial mass coefficient |
| CN114763817A (en) * | 2021-01-14 | 2022-07-19 | 南京理工大学 | Inertial container device with rod type structure |
| CN114763817B (en) * | 2021-01-14 | 2024-04-09 | 南京理工大学 | Inertial container device with rod type structure |
| CN112855877A (en) * | 2021-01-28 | 2021-05-28 | 江苏大学 | Rotary inertia container for realizing inertia mass two-stage adjustment based on planetary gear mechanism |
| CN112855877B (en) * | 2021-01-28 | 2022-07-22 | 江苏大学 | Rotary inertia container for realizing inertia mass two-stage adjustment based on planetary gear mechanism |
| CN115637638A (en) * | 2022-10-26 | 2023-01-24 | 哈尔滨工业大学 | Variable inertial mass semi-active tuned mass damper inertial container and frequency tuning method |
| CN115637638B (en) * | 2022-10-26 | 2024-01-12 | 哈尔滨工业大学 | Inertial container of variable inertial semi-active tuning mass damper and frequency tuning method |
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Application publication date: 20120620 |