阅读说明：本技术 一种基于杠杆的滚珠丝杠式半主动惯容装置 (Ball screw type semi-active inerter device based on lever ) 是由 陈志强 熊逸群 武熙超 崔康康 于 2021-10-08 设计创作，主要内容包括：本发明公开了一种基于杠杆的滚珠丝杠式半主动惯容装置,包括：旋转飞轮,其上沿周向均布有多个质量块；质量块能够相对旋转飞轮的径向往复运动,并通过连杆与套环铰接,且可相对套环转动；第一驱动单元用于带动套环上下移动,以带动质量块的移动；导向单元用于对套环的移动进行导向；滚珠丝杠单元,其中丝杠的上端与旋转飞轮相连,丝杠螺母下端与多个力臂可调的杠杆机构相连；均布在丝杠螺母下端的多个杠杆机构,杠杆机构通过与其铰接的支撑杆固定支撑在固定板上,内侧与丝杠螺母铰接,外侧设有力臂调节单元,能够调节相对支撑杆的力臂大小,同时带动丝杠螺母上下移动以驱动丝杠转动,进而带动旋转飞轮的转动。本发明增大了惯容系数的调节范围。(The invention discloses a lever-based ball screw type semi-active inertial capacity device, which comprises: the rotary flywheel is uniformly provided with a plurality of mass blocks along the circumferential direction; the mass block can do radial reciprocating motion relative to the rotating flywheel, is hinged with the lantern ring through the connecting rod and can rotate relative to the lantern ring; the first driving unit is used for driving the lantern ring to move up and down so as to drive the mass block to move; the guide unit is used for guiding the movement of the lantern ring; the upper end of the lead screw is connected with the rotating flywheel, and the lower end of the lead screw nut is connected with a plurality of lever mechanisms with adjustable moment arms; the lever mechanisms are fixedly supported on the fixing plate through support rods hinged with the lever mechanisms, the inner sides of the lever mechanisms are hinged with the screw nuts, the outer sides of the lever mechanisms are provided with force arm adjusting units, the force arm size of the relative support rods can be adjusted, and meanwhile the screw nuts are driven to move up and down to drive the screw rods to rotate so as to drive the rotary flywheels to rotate. The invention enlarges the adjusting range of the inertia capacity coefficient.)

1. A lever-based ball screw type semi-active inerter device, comprising:

the rotary flywheel is uniformly provided with a plurality of mass blocks along the circumferential direction; the mass block can reciprocate relative to the radial direction of the rotating flywheel; the mass block is hinged with the lantern ring through a connecting rod and can rotate relative to the lantern ring;

the first driving unit is used for driving the lantern ring to move up and down so as to drive the mass block to move relative to the rotating flywheel;

the guide unit is used for guiding the movement of the lantern ring in the vertical direction;

the upper end of the lead screw is connected with the rotating flywheel, and the lower end of the lead screw nut is connected with a plurality of lever mechanisms with adjustable moment arms;

the lever mechanisms are fixedly supported on the fixing plate through the supporting rods hinged with the lever mechanisms, the inner sides of the lever mechanisms are hinged with the screw nuts, the force arm adjusting units are arranged on the outer sides of the lever mechanisms, the force arm size of the opposite supporting rods can be adjusted, and meanwhile the screw nuts can be driven to move up and down to drive the screw rods to rotate so as to drive the rotary flywheels to rotate.

2. The lever-based ball-screw semi-active inertance device of claim 1, wherein the first drive unit comprises a fixed frame, a linear motor fixed to the fixed frame;

the fixed frame is fixed on the bearing, and the lead screw is fixedly connected with the rotating flywheel through the bearing; the linear motor is connected with the lantern ring and used for driving the lantern ring to move up and down.

3. The lever-based ball-screw semi-active inertance device of claim 2, wherein the guiding unit is disposed between a stationary frame and a rotating flywheel.

4. The lever-based ball screw-type semi-active inerter device of claim 1, wherein the lever mechanism comprises a mounting cylinder, an adjusting screw and an adjusting nut disposed within the mounting cylinder in cooperation with one another; the inner side of the mounting cylinder is hinged with a screw nut through a connecting rod, and the outer side of the mounting cylinder is provided with a stepping motor for driving an adjusting screw to rotate; the adjusting nut is hinged with the upper end of the sliding connecting rod, and the lower end of the sliding connecting rod is connected with the bottom plate in a sliding manner; the rotation of the stepping motor can drive the bottom plate to move up and down relative to the fixing plate, and the stepping motor, the adjusting screw rod, the adjusting nut and the bottom plate form a force arm adjusting unit.

5. The lever-based ball screw-type semi-active inertance device of claim 1, wherein the inertance b satisfies:

wherein p is the lead of the ball screw unit and J is the moment of inertia of the rotating flywheel; l is₂The lever mechanism is hinged with the fixed plate, the lever mechanism is hinged with the screw nut, and the force arm between the two hinged points is large and small; l is₁The lever mechanism is hinged with the fixed plate, the force arm adjusting unit is hinged with the support rod, and the force arm between the two hinged points is large.

Technical Field

The invention belongs to the field of semi-active inerter, and particularly relates to a ball screw type semi-active inerter device based on a lever.

Background

The inerter is a two-terminal one-port mechanical element based on the electromechanical similarity theory, the relative acceleration at two ends of the element is in direct proportion to the force applied at two ends of the element, and a proportionality coefficient is called an inerter coefficient and has the same dimension with mass. Conventional solutions have been applied to various mechanical systems, such as automotive suspension systems. The inertial volume can generate the same vibration damping effect with a mass block which is several times of the mass of the inertial volume. The suspension with the combination of the inerter, the spring and the damper is used for an F1 racing car, so that the control performance of the racing car is greatly improved; the train suspension with the inertial container can improve the riding comfort and the running safety of a train; in a vehicle suspension system, inertial capacity can improve the vibration isolation performance of the vehicle suspension.

The inerter that has been proposed so far mainly includes three types, namely, rack and pinion type inerter, ball screw type inerter, and hydraulic type inerter. However, these inertias have the disadvantages that the inertias coefficient can not be adjusted on line and can not be adapted to the complicated and variable environment. In order to make up for the deficiency, a concept of semi-active inertial capacity is provided, and the inertial capacity coefficient of the semi-active inertial capacity can be adjusted on line and can adapt to complex and variable environments. The ball screw type semi-active inertia capacity based on the adjustable inertia flywheel realizes the adjustment of the inertia of the flywheel by changing the radial position of the upper slide block of the flywheel, and further realizes the adjustment of the inertia capacity coefficient. However, due to the limitation of the radius of the flywheel, the adjustment range of the inertial volume coefficient is limited to a certain extent, so that the applicable vibration frequency range is limited.

Disclosure of Invention

The invention aims to provide a lever-based ball screw type semi-active inertial volume device, which solves the problems that the adjustment range of an inertial volume coefficient is limited to a certain extent due to the limitation of the radius of a flywheel and the applicable vibration frequency range of the existing semi-active inertial volume based on an adjustable rotational inertia flywheel is limited, and increases the adjustment range of the inertial volume coefficient of the ball screw type semi-active inertial volume.

The technical solution for realizing the purpose of the invention is as follows:

a lever-based ball screw type semi-active inerter device, comprising:

the rotary flywheel is uniformly provided with a plurality of mass blocks along the circumferential direction; the mass block can reciprocate relative to the radial direction of the rotating flywheel; the mass block is hinged with the lantern ring through a connecting rod and can rotate relative to the lantern ring;

the first driving unit is used for driving the lantern ring to move up and down so as to drive the mass block to move relative to the rotating flywheel;

the guide unit is used for guiding the movement of the lantern ring in the vertical direction;

the upper end of the lead screw is connected with the rotating flywheel, and the lower end of the lead screw nut is connected with a plurality of lever mechanisms with adjustable moment arms;

the lever mechanisms are fixedly supported on the fixing plate through the supporting rods hinged with the lever mechanisms, the inner sides of the lever mechanisms are hinged with the screw nuts, the force arm adjusting units are arranged on the outer sides of the lever mechanisms, the force arm size of the opposite supporting rods can be adjusted, and meanwhile the screw nuts can be driven to move up and down to drive the screw rods to rotate so as to drive the rotary flywheels to rotate.

Compared with the prior art, the invention has the following remarkable advantages:

according to the invention, a lever mechanism is introduced on the basis of the ball screw type semi-active inertial container of the flywheel with adjustable rotational inertia, the rotational inertia of the rotating flywheel and the lead of the ball screw are combined, the adjustment range of the inertial volume coefficient of the equivalent semi-active inertial container can be changed by adjusting the ratio of two force arms of the lever mechanism, the vibration of an object can be eliminated, and the ball screw type semi-active inertial container has a wider application range.

Drawings

Fig. 1 is a three-dimensional view of a lever-based ball screw type semi-active inerter device according to the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a schematic structural view of the lever.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

With reference to fig. 1 to 3, the ball screw type semi-active inertia device based on the lever of the present embodiment includes a rotating flywheel and a ball screw coaxially connected up and down, and a lever with an adjustable arm-force ratio. The rotating flywheel is positioned in the fixed frame 1, the bearing 9 is arranged at the bottom of the fixed frame 1, and the top end of the screw rod 10 is fixedly connected with the rotating flywheel 8 through the bearing 9. Four evenly distributed connecting rods 21 are arranged at the lower part of a nut 11 of the ball screw, and the ball screw is connected with the lever through the connecting rods 21.

The rotating flywheel comprises a linear motor 2, a rotating shaft 3, a lantern ring 4, four movable mass blocks 7 and a flywheel turntable 8. One end of the linear motor 2 is fixedly connected with the fixed frame 1, the other end of the linear motor is fixedly connected with the lantern ring 4, the lantern ring 4 is sleeved on the rotating shaft 3, the upper end of the rotating shaft 3 penetrates through the fixed frame 1, and the lower end of the rotating shaft is fixed on the flywheel turntable 8 to guide the lantern ring 4; the lantern ring 4 and the four movable masses 7 are hinged through the connecting rods 5 respectively. The lantern ring 4 is internally provided with a bearing, the lower end of the connecting rod 5 is hinged with the mass block 7, and the upper end of the connecting rod 5 is hinged with the bearing, so that the mass block 7 can rotate relative to the lantern ring 4; the four mass blocks 7 are uniformly distributed along the circumferential direction of the flywheel turntable 8, the flywheel turntable 8 is provided with fixed slide rails 6, and the mass blocks 7 can move along the slide rails 6 in the radial direction of the flywheel turntable 8. The linear motor 2 can drive the lantern ring 4 to move up and down, and the mass block 7 is pulled to move through the connecting rod 5.

The ball screw comprises a screw shaft 10 and a nut 11 driving it in rotation. The nut 11 can move up and down under the action of the lever to drive the screw rod 10 to rotate, so that the flywheel turntable 8 is driven to rotate.

The lever with the adjustable arm-force ratio comprises an installation barrel 18, four stepping motors 13, four adjusting screw rods 12, four adjusting nuts 14 matched with the four adjusting screw rods 12 respectively, four sliding connecting rods 23, a fixing plate 16 and a bottom plate 17. The bottom plate 17 is provided with a slide rail, the upper end of the slide connecting rod 23 is hinged (hinge point 19) with the adjusting nut 14, and the lower end can move along the slide rail and keep vertical during the moving process. The stepping motor 13 is fixed with the mounting cylinder 18, the rotating shaft is connected with the adjusting screw 12, and the adjusting screw 12 can be driven to rotate, so that the adjusting nut 14 on the adjusting screw 12 linearly moves along the direction of the lever 12, the force arm of the lever is changed, and the force-arm ratio of the lever is changed. Two ends of the adjusting screw 12 are supported in the mounting cylinder 18 through bearings, the mounting cylinder 18 is connected with the fixing plate 16 through a support rod 15, the upper end of the support rod 15 is hinged (hinged point 20) with the mounting cylinder 18, and the lower end is fixedly connected with the fixing plate 16. One end of the mounting tube 18 near the rotating shaft 3 is hinged to a link 21 at the lower end of the nut 11 of the ball screw (hinge point 22).

The stepping motor 13 rotates to drive the adjusting nut 14 to move, the adjusting nut 14 drives the sliding connecting rod 23 to slide, so that the nut 11 is driven to move up and down, the bottom plate 17 is driven to move up and down relative to the fixing plate 16, the nut 11 moves up and down to drive the screw rod 10 to rotate, and the flywheel turntable 8 and the movable mass block 7 rotate together while the screw rod 10 rotates. The linear motor 2 can push the lantern ring 4 to move up and down, and the lantern ring 4 is connected with the movable mass 7 through the connecting rod 5, so that the movable mass 7 can move along the track of the sliding rail 6 on the flywheel turntable 8 due to the movement of the lantern ring 4. When the semi-active inertial volume rotates, the integral moment of inertia is changed by the movement of the movable mass block 7, so that the aim of adjusting the inertial volume on line is fulfilled.

As shown in FIG. 3, if the moment arm from the hinge point 20 (fulcrum) to the hinge point 19 between the connecting rod 23 and the adjusting nut 14 is L₁The force arm from the hinge point 20 (fulcrum) to the hinge point 22 between the mounting cylinder 18 and the connecting rod 21 is L₂The inertia capacity of the lever-based ball screw type semi-active inertia capacity can be obtained through force analysis and can be expressed as follows:

where p is the lead of the ball screw and J is the moment of inertia of the rotating flywheel. According to the formula, the inertia capacity b can be obtained by changing the distance L₁And the radius of rotation of the movable mass 7 is adjusted online.