CN202230388U

CN202230388U - Device for enhancing swing oscillation amplitude automatically

Info

Publication number: CN202230388U
Application number: CN2011203649330U
Authority: CN
Inventors: 雷作胜; 陈超越; 张利杰
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2011-09-28
Filing date: 2011-09-28
Publication date: 2012-05-23
Anticipated expiration: 2021-09-28

Abstract

The utility model relates to a device for enhancing a swing oscillation amplitude automatically, comprising a swing swinging rope, a swing pedal, also a swinging length control motor and a swing motion axis. The swing motion axis is fixedly connected on the swinging length control motor, the swinging length control motor drives the swing motion axis to rotate forward and reversely and the swing swinging rope is wound on the swing motion axis; the length of the swing swinging rope changes along with the forward and reverse rotations of the swing motion axis, and the swing pedal is fixed on the swing swinging rope. Compared with the prior art, the device for enhancing the swing oscillation amplitude automatically of the utility model is simple in structure; by controlling the swinging length of a swing, a method of being simple and easy, not bothering players and driving the swing to swing by the pushing of other people or by controlling own gravity center is provided, so that the swing can swing continuously, the oscillation amplitude can be enhanced gradually in a sine function form, and the players can enjoy the swing fun most comfortably.

Description

A kind of device of automatic enhancing swing oscillation amplitude

Technical field

The utility model relates to a kind of device that makes the swing swing, and particularly a kind of device of automatic enhancing swing oscillation amplitude belongs to the recreational facilities field.

Background technology

Playing on a swing is the recreation that a kind of player's health rises and falls up and down along with swing together, and as a folk entertainment ludic activity that generation just comes into vogue from Chinese Shanxi, current trend is in all parts of the world.The dual mode of generally having played on a swing now, a kind of player of being is sitting on the pedal, by the stranger player's behind promote or body before pulling let player's health along with swing rises and falls up and down together.Another kind method is that player oneself makes swing that an initial velocity is arranged when climbing up the pedal of swing, produces a little swing, along with the action of standing up and squatting down is done in the swing of swing, when swing falls, squats down then, when swing rises, stands; The key here is to utilize the action control center of gravity of rule, thus the equivalent length of control swing pendulum rope.The defective of existing mode of playing on a swing is that when being promoted by manual work, the swing of swing is at times strong and at other times weak, can not realize the purpose that lets the swing amplitude of fluctuation progressively strengthen; During player oneself swing, center of gravity is difficult to control, and can not disposablely remain on the higher amplitude of fluctuation, can not let the player cosily enjoy the enjoyment of swing.

The utility model content

To defective of the prior art, the purpose of the utility model provides a kind of device of automatic enhancing swing oscillation amplitude.The pendulum length that proposes swing pendulum rope is periodically regulated length at its axis of rotation place according to certain frequency and amplitude.In the amplitude of pendulum length adjusting, when frequency satisfies specified conditions, depart from the swing of initial rest position and can put high more gradually more with the form of parameter resonance.

For achieving the above object, the utility model adopts following technical scheme:

A kind of device of automatic enhancing swing oscillation amplitude; Comprise swing pendulum rope and swing pedal; Also comprise pendulum length control motor and swing motion axle center; Said swing motion axle center is fixedly connected on the said pendulum length control motor, and the said swing motion of said pendulum length control motor-driven axle center positive and reverse return changes, and said swing pendulum rope is wound on said swing kinematic axis in the heart; The length of said swing pendulum rope is along with the positive and reverse return in said swing motion axle center transfers to change, and said swing pedal is fixed on the said swing pendulum rope.

This device realizes that the swing principle that pendulum is high more more gradually is following:

The utility model is at first analyzed the simple harmonic motion of swing through Lagrange's dynamical equations.Make the pendulum length of swing LWith the angle that departs from vertical position All be about the time tFunction.Then swing motion control equation is:

（1）

Make pendulum length LThe frequency that changes satisfies the condition of swing single pendulum natural frequency, thereby makes the swing of swing and the variation of pendulum length form parameter resonance, and puts higher and higher with the form of parameter resonance.Therefore make ; Wherein is swing pendulum rope initial length;

changes amplitude for the swing pendulum length; With seasonal swing pendulum rope length variations frequency is the multiple of swing natural frequency, so swing motion control equation becomes:

Figure 2011203649330100002DEST_PATH_IMAGE007

（2）

Through setting starting condition and finding the solution this equation and can obtain a result, promptly utilize periodically and control swing pendulum length length, make the horizontal shift of swing constantly increase, thereby reach the purpose that makes swing put higher and higher with the form that parameter resonates.

The utility model has following conspicuous outstanding substantive distinguishing features compared with prior art:

Than existing technology; The utility model is simple in structure; Utilize control swing pendulum length to provide a kind of simple; And do not make the player take a lot of trouble to let other people promote or the way that oneself control center of gravity drives the swing swing can be gone down swing in persistent oscillation, and make the amplitude of vibration progressively strengthen, make the enjoyment of enjoying swing of player's the most comfortable with the form of a sine function.

Description of drawings

Fig. 1 is the side schematic view of the utility model swing kinematic system.

Fig. 2 is the front schematic view of the utility model swing kinematic system.

Fig. 3 is the figure as a result of the swing wobble amplitude of the utility model embodiment.

Embodiment

Embodiment to the utility model describes in further detail below in conjunction with accompanying drawing,

As depicted in figs. 1 and 2; A kind of device of automatic enhancing swing oscillation amplitude; Comprise swing pendulum rope 2 and swing pedal 3, also comprise pendulum length control motor 1 and swing motion axle center 4, said swing motion axle center 4 is fixedly connected on the said pendulum length control motor 1; Said pendulum length control motor 1 drives said swing motion axle center 4 positive and negative rotations; Said swing pendulum rope 2 is wound on the said swing motion axle center 4, and the length of said swing pendulum rope 2 is along with the positive and reverse return in said swing motion axle center 4 then change, and said swing pedal 3 is fixed on the said swing pendulum rope 2.

According to (2) formula; In the present embodiment; The initial pendulum length

of swing pendulum rope 2 is 5m; It is 0.001 that the swing pendulum length changes amplitude

, and the pendulum length change frequency of being controlled by pendulum length control motor 1 is

=2.8.After giving less initial velocity of swing, let it vibrate naturally, open pendulum length control motor 1 periodic Control pendulum length simultaneously, make the amplitude of swing progressively increase.As shown in Figure 3, by calculating swing displacement in the horizontal direction, along with the carrying out of swing, swing is put higher and higher.Can regulate the swing pendulum length as required and change maximum amplitude, parameters such as the pendulum length of swing are to satisfy different crowd, the needs of occasion.

Claims

1. device that automatically strengthens the swing oscillation amplitude; Comprise swing pendulum rope (2) and swing pedal (3); It is characterized in that also comprise pendulum length control motor (1) and swing motion axle center (4), said swing motion axle center (4) is fixedly connected on the said pendulum length control motor (1); Said pendulum length control motor (1) drives the said swing motion positive and negative rotation in axle center (4); Said swing pendulum rope (2) is wound on the said swing motion axle center (4), and the length of said swing pendulum rope (2) is along with the positive and reverse return in said swing motion axle center (4) then change, and said swing pedal (3) is fixed on the said swing pendulum rope (2).