CN109236948B - Inertial container with large inertial mass ratio characteristic - Google Patents

Inertial container with large inertial mass ratio characteristic Download PDF

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Publication number
CN109236948B
CN109236948B CN201811275949.7A CN201811275949A CN109236948B CN 109236948 B CN109236948 B CN 109236948B CN 201811275949 A CN201811275949 A CN 201811275949A CN 109236948 B CN109236948 B CN 109236948B
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Prior art keywords
planet wheel
bearing
inerter
gear
shaft
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CN109236948A (en
Inventor
潘存治
张林浩
王坤
徐梦超
邢海军
申永军
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Shijiazhuang Tiedao University
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Shijiazhuang Tiedao University
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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F16F15/31—Flywheels characterised by means for varying the moment of inertia
    • 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
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
    • F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Retarders (AREA)

Abstract

The invention discloses an inerter with a large inerter-mass ratio characteristic, which comprises a gear box, a shell fixedly arranged below the gear box, a planetary wheel assembly and a sun wheel assembly movably arranged with the gear box through a rotating arm, a ball nut arranged at the outer side of a ball screw section of the sun wheel assembly in a threaded manner, a ball spline shaft fixedly connected with the ball nut through a bolt, and a ball spline in matched connection with the ball spline shaft, wherein the planetary wheel assembly and the sun wheel assembly are fixedly arranged on the gear box through a rotating arm; the invention relates to an inerter with large inerter-mass ratio, which comprises a single-degree-of-freedom epicyclic gear train consisting of a planetary wheel assembly, a sun wheel assembly and a rotating arm, wherein when a ball spline shaft moves up and down relative to a shell, the ball spline shaft drives a ball nut to move up and down, the ball nut drives a ball screw shaft to rotate, and the ball screw shaft rotates to drive the single-degree-of-freedom epicyclic gear train to move, so that the speed increasing function is realized.

Description

Inertial container with large inertial mass ratio characteristic
Technical Field
The invention relates to an inerter, in particular to an inerter with a large inerter-mass ratio characteristic, and belongs to the technical field of vibration control.
Background
A novel two-end-point mechanical device of an inerter can be applied to the fields of vehicle suspension vibration isolation, building vibration isolation and the like, the stress of the device is in direct proportion to the relative acceleration of two ends, and the ratio is called as an inerter coefficient; the inerter uses smaller mass to realize the dynamic characteristic of a large inerter, the ratio of the inerter coefficient to the mass of the inerter is called the inerter ratio, the inerter ratio of the inerter is improved, the aim of reducing the mass and the size of the inerter under the condition of the same dynamic characteristic can be realized, and the inerter is very useful in vibration reduction and vibration isolation systems with large energy, such as bridge vibration reduction. Common inerter containers are divided into a mechanical type and a hydraulic type, the mechanical type comprises a ball screw type and a rack and pinion type, and the common characteristic of the mechanical type inerter container is that the kinetic energy of a mass block or a flywheel is amplified through a speed increasing mechanism, so that a larger virtual mass is obtained, and in order to improve the inerter-to-mass ratio of the inerter container, the transmission ratio of the speed increasing mechanism of the inerter container needs to be increased.
Disclosure of Invention
In order to solve the problems, the invention provides an inerter with a large inerter-to-mass ratio characteristic, which realizes a speed increasing function, and can realize a large inerter coefficient when the mass of the whole inerter is not large due to a large transmission ratio, thereby achieving the effect of a large inerter-to-mass ratio.
The inerter with the large inerter-mass ratio characteristic comprises a gear box, a shell fixedly arranged below the gear box, a planetary wheel assembly and a sun wheel assembly movably arranged with the gear box through a rotating arm, a ball nut arranged at the outer side of a ball screw rod section of the sun wheel assembly in a threaded mode, a ball spline shaft fixedly connected with the ball nut through a bolt, and a ball spline in matched connection with the ball spline shaft; the ball screw section of the sun gear assembly penetrates through the gear box and extends into the shell;
the gear box comprises an annular box body, a box cover and a box bottom which are respectively arranged on the upper side and the lower side of the annular box body, a blank cover fixedly arranged at the center of the upper side of the box cover, and a through cover fixedly arranged at the center of the lower side of the box bottom;
the planet wheel assembly comprises a planet wheel shaft, a first planet wheel, a second planet wheel and a blocking cover, wherein the first planet wheel and the second planet wheel are respectively installed with the planet wheel shaft through a planet wheel bearing in a transmission way, and the blocking cover is fixed with the planet wheel shaft through a bolt; the first planet wheel and the second planet wheel are respectively positioned at two ends of a planet wheel shaft;
the sun wheel assembly comprises a ball screw shaft, and a rotating sun wheel and a fixed sun wheel which are respectively arranged with the ball screw shaft through a first sleeve and a second sleeve; the upper side and the lower side of the rotating sun gear and the fixed sun gear on the ball screw shaft are respectively provided with a rotary arm bearing and an angular contact bearing; the rotating sun wheel is fixedly arranged on the ball screw shaft and is positioned between the first sleeve and the rotary arm bearing; the fixed sun wheel is sleeved on the second sleeve, and the upper end surface of the fixed sun wheel is provided with a threaded blind hole; the fixed sun gear is fixedly connected with the gear box through a bolt; the rotating sun wheel is fixed on the ball screw shaft, the fixed sun wheel is fixedly connected with the gear box through a bolt, the ball screw shaft is supported on the gear box and the fixed sun wheel through an angular contact bearing, the rotating arm is supported on the ball screw shaft through a rotating arm bearing, and the planetary wheel assembly is supported on the rotating arm through a planetary wheel bearing;
the rotating arm is provided with a plurality of bearing holes; the inner hole surface of the bearing hole is matched with the outer rings of the planet wheel bearing and the rotating arm bearing; the end faces of the hole shoulders of the bearing holes are tightly attached to the end faces of the outer rings of the planet wheel bearing and the rotating arm bearing, the bearing holes are used for positioning the end faces of the outer rings of the planet wheel bearing and the rotating arm bearing, and the number of the bearing holes which are uniformly distributed along the circumferential direction is the same as that of the planet wheel assemblies;
the rotating sun wheel is externally meshed with the first planet wheel; the fixed sun gear is externally meshed with the second planet gear; the modulus of the first planet wheel, the modulus of the second planet wheel, the modulus of the rotating sun wheel and the modulus of the fixed sun wheel are the same; the difference value of the product of the number of teeth of the rotating sun wheel and the number of teeth of the second planet wheel and the product of the number of teeth of the fixed sun wheel and the number of teeth of the first planet wheel is 1, so that a single-degree-of-freedom epicyclic gear train can be formed by the planet wheel assembly, the sun wheel assembly and the rotating arm, and the angular speed of the rotating arm is far greater than that of the first planet wheel.
Furthermore, an upper annular groove and a lower annular groove are respectively arranged on the upper inner ring and the lower inner ring of the annular box body; the center of the box cover and the box bottom is respectively provided with an upper boss and a lower boss which are matched with an upper annular groove and a lower annular groove of the annular box body; the box cover and the annular box body are clamped with an upper annular groove arranged on the upper inner ring of the annular box body through an upper boss arranged on the box cover and are fixedly connected through bolts; the box bottom and the annular box body are clamped with a lower annular groove arranged on an inner ring at the lower side of the annular box body through a lower boss arranged on the box bottom and are fixedly connected through bolts.
Further, the ball spline is mounted to the lower end of the housing and is axially positioned through the aperture with a circlip.
Furthermore, a first shaft collar is arranged on one side, away from the blocking cover, of the planet wheel bearing; the two first shaft rings are respectively sleeved on the periphery of the planetary wheel shaft; the planet wheel bearing, the first planet wheel and the baffle cover are sequentially contacted with the inner ring end surface of the planet wheel bearing and the end surface of the first planet wheel through the first shaft ring to realize the axial positioning of the planet wheel shaft; the planet wheel bearing, the second planet wheel and the baffle cover are sequentially contacted with each other through the first shaft collar, the inner ring end surface of the planet wheel bearing and the end surface of the second planet wheel to realize axial positioning of the planet wheel shaft; the first planet wheel and the second planet wheel are respectively positioned in the circumferential direction of the planet wheel shaft by means of key connection.
Furthermore, a second collar is arranged on one side of the rocker bearing, which is far away from the angular contact bearing; the two second shaft rings are respectively sleeved on the periphery of the ball screw shaft; the tumbler bearing, the rotary sun gear, the first sleeve and the angular contact bearing are sequentially contacted through the second shaft ring and the inner ring end surface of the tumbler bearing, and the rotary sun gear is sequentially contacted through the second shaft ring, the inner ring end surface of the tumbler bearing, the rotary sun gear, the first sleeve and the inner ring end surface of the angular contact bearing to realize the axial positioning of the ball screw shaft; the rotating sun wheel is connected with the ball screw shaft through keys to realize circumferential positioning of the ball screw shaft; the tumbler bearing, the second sleeve and the angular contact bearing are sequentially contacted with each other through the second collar, the inner ring end face of the tumbler bearing, the inner ring end face of the second sleeve and the inner ring end face of the angular contact bearing, so that the axial positioning of the ball screw shaft is realized.
Furthermore, the excircle of the non-gear part of the fixed sun gear is matched with a first positioning hole arranged on the box cover; the blank cover, the box cover and the fixed sun gear are screwed on the threaded blind hole of the fixed sun gear through the bolt passing through the blank cover and the unthreaded hole arranged on the box cover to form fixed connection; the inner circle of the non-gear part of the fixed sun gear is matched with the angular contact bearing; a gap is reserved between the end face of the blank cap and the end face of the outer ring of the angular contact bearing; a second positioning hole arranged at the box bottom is matched with an outer ring of the angular contact bearing; the end face of the through cover is contacted with the end face of the outer ring of the angular contact bearing.
As a preferred embodiment, a plurality of planet wheel assemblies are movably arranged in the gear box through a rotating arm, and the planet wheel assemblies are uniformly distributed on the rotating arm.
In a preferable embodiment, the fixed sun gear and the two second planet gears are both externally engaged through straight-toothed spur gear transmission; in order to ensure standard top clearance and zero backlash meshing, at least one pair of fixed sun gears and the straight toothed spur gear of the second planet gear are in meshing transmission by adopting modified gears.
Furthermore, the upper end of the shell is provided with a circular groove matched with a lower boss of the box bottom, and the circular groove is fixedly connected with the box bottom through a bolt.
Further, a connecting flange is mounted at the lower end of the shell; its lower extreme of ball spline shaft is provided with connecting thread, and the casing lower extreme sets up the flange as a link, and the ball spline shaft lower extreme sets up the screw thread as another link, and the motion transmission line does: the ball spline shaft moves up and down relative to the shell → the ball nut moves up and down → the ball screw shaft rotates → the rotating sun gear rotates → the rotating arm rotates, and the speed increasing function is realized because the angular speed of the rotating arm is far greater than that of the first planet gear.
Compared with the prior art, the inertia container with the large inertia-mass ratio characteristic has the advantages that the rotating speed of the rotating arm in the single-degree-of-freedom epicyclic gear train consisting of the planet wheel assembly, the sun wheel assembly and the rotating arm is far greater than that of the rotating sun wheel, when the ball spline shaft moves up and down relative to the shell, the ball spline shaft drives the ball nut to move up and down, the ball nut drives the ball screw shaft to rotate, the ball screw shaft rotates to drive the single-degree-of-freedom epicyclic gear train to move, the speed increasing function is realized, and due to the large transmission ratio, when the mass of the whole inertia container is not large, the large inertia-mass ratio characteristic can be realized, so that the effect of the large inertia-mass.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the gearbox configuration of the present invention.
Fig. 3 is a schematic view of the planetary gear set structure of the present invention.
Fig. 4 is a schematic view of the sun gear set structure of the present invention.
Fig. 5 is a schematic view of the front view structure of the rotating arm of the present invention.
Fig. 6 is a schematic view of a sectional structure of a rotating arm in a top view.
Fig. 7 is a mechanism motion diagram of a single-degree-of-freedom epicyclic gear train consisting of a planet wheel assembly, a sun wheel assembly and a rotating arm.
The parts in the drawings are marked as follows: 1-a gear box; 101-box bottom; 102-an annular box; 103-box cover; 104-blank cap; 105-through cap; 106-first positioning hole; 107-a second positioning hole; 2-a planet wheel assembly; 201-a first planet; 202-planet wheel shaft; 203-planet wheel bearings; 204-a second planet; 205-stop cover; 206-a first collar; 3-a sun wheel assembly; 301-ball screw section; 302-angular contact bearing; 303-a first sleeve; 304-a rotating sun gear; 305-tumbler bearing; 306-a second sleeve; 307-a stationary sun gear; 308-threaded blind holes; 309-second collar; 310-ball screw shaft; 4-a rotating arm; 401-bearing bore; 5-a shell; 6-ball nut; 7-a ball spline shaft; 8-ball spline; and 9-elastic check ring for hole.
Detailed Description
Example 1:
the inerter with high inerter ratio as shown in fig. 1 to 6 comprises a gear box 1, a shell 5 fixedly arranged below the gear box 1, a planet wheel assembly 2 and a sun wheel assembly 3 movably arranged with the gear box 1 through a rotating arm 4, a ball nut 6 arranged outside a ball screw section 301 of the sun wheel assembly 3 in a threaded manner, a ball spline shaft 7 fixedly connected with the ball nut 6 through a bolt, and a ball spline 8 in matched connection with the ball spline shaft 7; the ball screw section 301 of the sun gear assembly 3 passes through the gear box 1 and extends into the shell 5;
the gear box 1 comprises an annular box body 102, a box cover 103 and a box bottom 101 which are respectively arranged on the upper side and the lower side of the annular box body 102, a blank cover 104 fixedly covering the center of the upper side of the box cover 103, and a through cover 105 fixedly arranged on the center of the lower side of the box bottom 101;
the planet wheel assembly 2 comprises a planet wheel shaft 202, a first planet wheel 201 and a second planet wheel 204 which are respectively installed with the planet wheel shaft 202 through a planet wheel bearing 203 in a transmission way, and a blocking cover 205 fixed with the planet wheel shaft 202 through bolts; the first planet wheel 201 and the second planet wheel 204 are respectively positioned at two ends of the planet wheel shaft 202;
the sun gear assembly 3 comprises a ball screw shaft 310, and a rotating sun gear 304 and a fixed sun gear 307 which are respectively arranged with the ball screw shaft 310 through a first sleeve 303 and a second sleeve 306; a rotary arm bearing 305 and an angular contact bearing 302 are respectively arranged on the upper side and the lower side of the rotary sun gear 304 and the fixed sun gear 307 on the ball screw shaft 310; the method comprises the following steps of; the rotating sun gear 304 is fixedly mounted on the ball screw shaft 310 and is located between the first sleeve 303 and the pivot bearing 305; the fixed sun gear 307 is sleeved on the second sleeve 306, and a threaded blind hole 308 is formed on the upper end surface thereof; the fixed sun gear 307 is fixedly connected with the gear box 1 through a bolt; the rotating sun gear 304 is fixed to a ball screw shaft 310, the fixed sun gear 307 is fixedly connected to the gear case 1 by a bolt, the ball screw shaft 310 is supported by the gear case 1 and the fixed sun gear 307 through an angular contact bearing 302, the rotating arm 4 is supported by the ball screw shaft 310 through a rotating arm bearing 305, and the planetary wheel assembly 2 is supported by the rotating arm 4 through a planetary wheel bearing 203;
a plurality of bearing holes 401 are formed in the rotating arm 4; the inner hole surface of the bearing hole 401 is matched with the outer rings of the planet wheel bearing 203 and the tumbler bearing 305; the end face of the hole shoulder of the bearing hole 401 is tightly attached to the end face of the outer ring of the planet wheel bearing 203 and the end face of the tumbler bearing 305; the outer ring end faces of the planet wheel bearing 203 and the tumbler bearing 305 are positioned, and the number of the bearing holes 401 uniformly distributed along the circumferential direction is the same as that of the planet wheel assemblies 2;
the rotating sun gear 304 is externally engaged with the first planet gear 201; the fixed sun gear 307 is in external mesh with the second planet gears 204; the modules of the first planet wheel 201, the second planet wheel 204, the rotating sun wheel 304 and the fixed sun wheel 307 are the same; the difference between the product of the number of teeth of the rotating sun gear 304 and the number of teeth of the second planet gear 204 and the product of the number of teeth of the fixed sun gear 307 and the number of teeth of the first planet gear 201 is 1, so that the single-degree-of-freedom epicyclic gear train can be formed by the planet gear assembly 2, the sun gear assembly 3 and the rotating arm 4, and the angular speed of the rotating arm 4 is far greater than that of the first planet gear 201.
The inner rings of the upper side and the lower side of the annular box body 102 are respectively provided with an upper annular groove and a lower annular groove; the center of the box cover 103 and the box bottom 101 is respectively provided with an upper boss and a lower boss which are matched with an upper annular groove and a lower annular groove of the annular box body 102; the box cover 103 and the annular box body 102 are clamped with an upper annular groove arranged on the inner ring on the upper side of the annular box body 102 through an upper boss arranged on the box cover 103 and are fixedly connected through bolts; the box bottom 101 and the annular box body 102 are clamped with a lower annular groove arranged on the lower inner ring of the annular box body 102 through a lower boss arranged on the box bottom 101, and are fixedly connected through bolts.
The ball spline 8 is mounted to the lower end of the housing 5 and is axially located through the hole by a circlip 9.
A first shaft ring 206 is arranged on one side of the planet wheel bearing 203, which is far away from the baffle cover 205; the two first collars 206 are respectively sleeved on the periphery of the planetary wheel shaft 202; the planet wheel bearing 203, the first planet wheel 201 and the baffle cover 205 are axially positioned on the planet wheel shaft 202 through sequential contact of a first shaft ring 206, the end surface of the inner ring of the planet wheel bearing 203 and the end surface of the first planet wheel 201; the planet wheel bearing 203, the second planet wheel 204 and the baffle cover 205 are axially positioned on the planet wheel shaft 202 through sequential contact of a first shaft collar 206, the end surface of the inner ring of the planet wheel bearing 203 and the end surface of the second planet wheel 204; the first planet wheel 201 and the second planet wheel 204 are respectively positioned in the circumferential direction of the planet wheel shaft 202 by means of key connection.
A second collar 309 is mounted on the side of the pivot bearing 305 facing away from the angular contact bearing 302; the two second collars 309 are respectively sleeved on the periphery of the ball screw shaft 310; the tumbler bearing 305, the rotating sun gear 304, the first sleeve 303 and the angular contact bearing 302 are sequentially contacted through the second collar 309, the inner ring end surface of the tumbler bearing 305, the rotating sun gear 304, the first sleeve 303 and the angular contact bearing 302 to realize the axial positioning of the ball screw shaft 310; the rotary sun gear 304 is connected with the ball screw shaft 310 in a key manner to realize circumferential positioning; the tumbler bearing 305, the second sleeve 306 and the angular contact bearing 302 are axially positioned on the ball screw shaft 310 by sequentially contacting the second collar 309, the end face of the inner race of the tumbler bearing 305, the end face of the inner race of the second sleeve 306 and the end face of the inner race of the angular contact bearing 302.
The outer circle of the non-gear part of the fixed sun gear 307 is matched with a first positioning hole 106 arranged on the box cover 103; the blank cover 104, the box cover 103 and the fixed sun gear 307 are screwed on the threaded blind hole 308 of the fixed sun gear 307 through the unthreaded hole arranged on the blank cover 104 and the box cover 103 by bolts to form fixed connection; the inner circle of the non-gear tooth part of the fixed sun gear 307 is matched with the angular contact bearing 302; a gap is reserved between the end surface of the blank cap 104 and the end surface of the outer ring of the angular contact bearing 302; a second positioning hole 107 formed in the box bottom 101 is matched with an outer ring of the angular contact bearing 302; the end face of the through cover 105 is in contact with the end face of the outer ring of the angular contact bearing 302.
A plurality of planet wheel assemblies 2 are movably mounted in the gear box 1 through a rotating arm 4, and the planet wheel assemblies 2 are uniformly distributed on the rotating arm 4.
The upper end of the shell 5 is provided with a circular groove (not shown) for matching with the lower boss of the box bottom 101, and the circular groove is fixedly connected with the box bottom 101 through a bolt.
A connecting flange (not shown) is mounted at the lower end of the housing 5; the lower end of the ball spline shaft 7 is provided with a connecting thread; 5 lower extremes of casing set up the flange as a link, and 7 lower extremes of ball spline shaft set up the screw thread as another link, and the motion transmission line is: the ball spline shaft 7 moves up and down relative to the housing 5 → the ball nut 6 moves up and down → the ball screw shaft 310 rotates → the rotating sun gear 304 rotates → the tumbler 4 rotates, and since the angular velocity of the tumbler 4 is much larger than that of the first planetary gear 201, a speed-increasing function is realized.
Example 2:
the inerter with large inerter-mass ratio as shown in fig. 1, 3 and 4 has a structure substantially the same as that of embodiment 1, wherein the fixed sun gear 307 and the two second planet gears 204 are both in external transmission engagement through a spur gear (not shown); in order to ensure standard top clearance and zero backlash meshing, at least one pair of fixed sun gears 307 is in meshing transmission with the straight toothed spur gear of the second planet gear 204 by adopting modified gear transmission.
As shown in FIG. 7, the inerter with large inerter-mass ratio of the invention comprises a single degree of freedom epicyclic gear train consisting of a planet wheel component 2, a sun wheel component 3 and a rotating arm 4, wherein the number of teeth of a rotating sun wheel 304 is set as Z1The number of teeth of the first planet wheel I201 is Z2The number of teeth of the second planet wheel 204 is Z3The number of teeth of the fixed sun gear 307 is Z4Angular velocity of the rotating sun gear 304 is ω1The angular velocity of the rotating arm 4 is omegaHThe angular velocity of the fixed sun gear 307 is ω4The calculation formula according to the transmission ratio of the epicyclic gear train is shown as formula (1) which is equal to 0,
Figure BDA0001846975200000091
the expression of the gear ratio obtained by the above equation is shown in equation (2),
Figure BDA0001846975200000092
when Z is3Z1And Z2Z42When the difference is 1, such as: z3＝Z1，Z2＝Z1+1 Z2＝Z1+1， Z4＝Z1-1 Z4＝Z1-1, the denominator of the above formula is 1, if Z3＝Z1＝20 Z3＝Z120, the transmission ratio
Figure 1
The transmission ratio is very high and according to the above analysis, a large transmission ratio, Z, is to be achieved1、Z2、Z3、Z4The number of teeth is close, because the center distance between the rotating sun gear 304 and the first planet gear 201 is equal to the fixed sun gear 307 andthe second planet wheels 204 have the same center distance, i.e. m (Z)1+Z2)＝m'(Z3+Z4)m(Z1+Z2)＝m′(Z3+Z4) Where m is the module of the rotating sun gear 304 and the first planet gear 201, m 'is the fixed sun gear 307 and the second planet gear 204, m and m ″ are standard values, and m' are the same to realize the standard backlash and backlash free of two pairs of meshing, and at least one pair of meshing transmission is the shift transmission.
The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.

Claims (10)

1. An inerter with high inerter ratio characteristics, comprising: the planetary gear type sun wheel assembly is characterized by comprising a gear box, a shell fixedly arranged below the gear box, a planetary wheel assembly and a sun wheel assembly movably arranged with the gear box through a rotating arm, a ball nut arranged at the outer side of a ball screw rod section of the sun wheel assembly in a threaded mode, a ball spline shaft fixedly connected with the ball nut through a bolt, and a ball spline in matched connection with the ball spline shaft; the ball screw section of the sun gear assembly penetrates through the gear box and extends into the shell;
the gear box comprises an annular box body, a box cover and a box bottom which are respectively arranged on the upper side and the lower side of the annular box body, a blank cover fixedly arranged at the center of the upper side of the box cover, and a through cover fixedly arranged at the center of the lower side of the box bottom;
the planet wheel assembly comprises a planet wheel shaft, a first planet wheel, a second planet wheel and a blocking cover, wherein the first planet wheel and the second planet wheel are respectively installed with the planet wheel shaft through a planet wheel bearing in a transmission way, and the blocking cover is fixed with the planet wheel shaft through a bolt; the first planet wheel and the second planet wheel are respectively positioned at two ends of a planet wheel shaft;
the sun wheel assembly comprises a ball screw shaft, and a rotating sun wheel and a fixed sun wheel which are respectively arranged with the ball screw shaft through a first sleeve and a second sleeve; the upper side and the lower side of the rotating sun gear and the fixed sun gear on the ball screw shaft are respectively provided with a rotary arm bearing and an angular contact bearing; the rotating sun wheel is fixedly arranged on the ball screw shaft and is positioned between the first sleeve and the rotary arm bearing; the fixed sun wheel is sleeved on the second sleeve, and the upper end surface of the fixed sun wheel is provided with a threaded blind hole; the fixed sun gear is fixedly connected with the gear box through a bolt;
the rotating arm is provided with a plurality of bearing holes; the inner hole surface of the bearing hole is matched with the outer rings of the planet wheel bearing and the rotating arm bearing; the end surface of the hole shoulder of the bearing hole is tightly attached to the end surface of the planet wheel bearing and the end surface of the outer ring of the rotating arm bearing;
the rotating sun wheel is externally meshed with the first planet wheel; the fixed sun gear is externally meshed with the second planet gear; the modulus of the first planet wheel, the modulus of the second planet wheel, the modulus of the rotating sun wheel and the modulus of the fixed sun wheel are the same; the difference between the product of the number of teeth of the rotating sun gear and the number of teeth of the second planet gear and the product of the number of teeth of the fixed sun gear and the number of teeth of the first planet gear is 1.
2. The inerter with high inerter ratio of claim 1, wherein: the inner rings of the upper side and the lower side of the annular box body are respectively provided with an upper annular groove and a lower annular groove; the center of the box cover and the box bottom is respectively provided with an upper boss and a lower boss which are matched with an upper annular groove and a lower annular groove of the annular box body; the box cover and the annular box body are clamped with an upper annular groove arranged on the upper inner ring of the annular box body through an upper boss arranged on the box cover and are fixedly connected through bolts; the box bottom and the annular box body are clamped with a lower annular groove arranged on an inner ring at the lower side of the annular box body through a lower boss arranged on the box bottom and are fixedly connected through bolts.
3. The inerter with high inerter ratio of claim 1, wherein: the ball spline is mounted at the lower end of the shell, and the ball spline is axially positioned by a spring retainer ring through a hole.
4. The inerter with high inerter ratio of claim 1, wherein: a first shaft collar is arranged on one side, which is far away from the blocking cover, of the planet wheel bearing; the two first shaft rings are respectively sleeved on the periphery of the planetary wheel shaft; the planet wheel bearing, the first planet wheel and the baffle cover are sequentially contacted with the inner ring end surface of the planet wheel bearing and the end surface of the first planet wheel through the first shaft ring to realize the axial positioning of the planet wheel shaft; the planet wheel bearing, the second planet wheel and the baffle cover are sequentially contacted with each other through the first shaft collar, the inner ring end surface of the planet wheel bearing and the end surface of the second planet wheel to realize axial positioning of the planet wheel shaft; the first planet wheel and the second planet wheel are respectively positioned in the circumferential direction of the planet wheel shaft by means of key connection.
5. The inerter with high inerter ratio of claim 1, wherein: a second collar is arranged on one side of the rocker bearing, which is far away from the angular contact bearing; the two second shaft rings are respectively sleeved on the periphery of the ball screw shaft; the tumbler bearing, the rotary sun gear, the first sleeve and the angular contact bearing are sequentially contacted through the second shaft ring and the inner ring end surface of the tumbler bearing, and the rotary sun gear is sequentially contacted through the second shaft ring, the inner ring end surface of the tumbler bearing, the rotary sun gear, the first sleeve and the inner ring end surface of the angular contact bearing to realize the axial positioning of the ball screw shaft; the rotating sun wheel is connected with the ball screw shaft through keys to realize circumferential positioning of the ball screw shaft; the tumbler bearing, the second sleeve and the angular contact bearing are sequentially contacted with each other through the second collar, the inner ring end face of the tumbler bearing, the inner ring end face of the second sleeve and the inner ring end face of the angular contact bearing, so that the axial positioning of the ball screw shaft is realized.
6. The inerter with high inerter ratio of claim 1, wherein: the excircle of the non-gear part of the fixed sun gear is matched with a first positioning hole arranged on the box cover; the blank cover, the box cover and the fixed sun gear are screwed on the threaded blind hole of the fixed sun gear through the bolt passing through the blank cover and the unthreaded hole arranged on the box cover to form fixed connection; the inner circle of the non-gear part of the fixed sun gear is matched with the angular contact bearing; a gap is reserved between the end face of the blank cap and the end face of the outer ring of the angular contact bearing; a second positioning hole arranged at the box bottom is matched with an outer ring of the angular contact bearing; the end face of the through cover is contacted with the end face of the outer ring of the angular contact bearing.
7. The inerter with high inerter ratio of claim 1, wherein: a plurality of planet wheel assemblies are movably mounted in the gear box through a rotating arm, and the planet wheel assemblies are uniformly distributed on the rotating arm.
8. The inerter with high inerter ratio of claim 1, wherein: the fixed sun gear and the two second planet gears are both in external meshing through straight-tooth cylindrical gear transmission.
9. The inerter with high inerter ratio of claim 1, wherein: the upper end of the shell is provided with a circular groove matched with a lower boss of the box bottom, and the circular groove is fixedly connected with the box bottom through a bolt.
10. The inerter with high inerter ratio of claim 1, wherein: the lower end of the shell is provided with a connecting flange; and the lower end of the ball spline shaft is provided with a connecting thread.
CN201811275949.7A 2018-10-30 2018-10-30 Inertial container with large inertial mass ratio characteristic Expired - Fee Related CN109236948B (en)

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CN110644350B (en) * 2019-08-23 2020-12-29 深圳大学 Bridge movable pneumatic measure device based on inertial volume vibration reduction and control method thereof
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
CN113147819B (en) * 2021-04-19 2023-01-17 中车青岛四方车辆研究所有限公司 Rotating arm joint and method for improving impact load resistance

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