CN109420324A

CN109420324A - The new toss method of more toss wheel table tennis casting devices

Info

Publication number: CN109420324A
Application number: CN201710728069.XA
Authority: CN
Inventors: 张和
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2019-03-05

Abstract

The invention proposes a kind of new methods that table tennis is cast using more (two or more) toss wheels.This method can substantially extend the rotating range of table tennis emitted by more toss wheel table tennis casting devices, it can be achieved that projecting the rotation (i.e. rotation of the sphere relative to its geometrically symmetric center) and a wide range of combination of the skyborne flying speed of ball setting of ball.To the ball with any swing and flying speed being likely to occur in modern table tennis of dishing out.

Description

The new toss method of more toss wheel table tennis casting devices

Technical field

The present invention relates to a kind of new methods that table tennis is cast using more (two or more) toss wheels.More toss wheels are cast Method has a wide range of applications in table tenning ball servicing machine technology.

Background technique

Two classes can be divided into using the device that toss wheel casts table tennis at present.First is that single toss wheel apparatus.Second is that more (two Or more) toss wheel apparatus.The relevant technologies can refer to following patent: United States Patent (USP) 3,794, and 011,4,116,438,4,325, 351,4,917,380,4,844,458,5,009,421,5,335,9054,5,383,658,5,485,995,5,533,722, 6,186,132,6,202,236,6,371,872,6,604,517.Chinese patent 02217946,03218645,87214545, 93213663,93244555,94217832,97240522,98230401,99207740.

Rotation that single-wheel device goes out ball because of it and velocity of shuttle flight can not send out the fatal of knuckle ball always at fixed direct ratio Defect is not able to satisfy using table tennis as competitive sport and the basic demand of training, can only be met reluctantly a small number of by table tennis Requirement of the ball as body building, does not repeat here.More wheel apparatus then can realize out ball by the independent revolving speed for setting each wheel Heading, the swing of speed and ball, the almost infinite multiple combinations of direction of rotation.Here only with the rotation of two toss wheels Illustrate the status of technique for the parallel two-wheel device of axis.Fig. 1 be the schematic three-dimensional figure of two-wheel ball-projecting device (for convenience The supporting member of each toss motor is concealed in description figure).The toss wheel being fixed on motor output shaft is symmetrically arranged at table tennis Pang ball goes out the two sides of ball access.Intermarginal minimum linear distance is slightly smaller than table tennis diameter outside two-wheeled.Arrow 1 and 2 indicates in figure The direction of rotation respectively taken turns.When table tennis is pushed between two throwing wheels by left in figure, the throwing wheel that ball is just rotated is along 5 side of arrow To dishing out.When upper and lower two-wheeled is identical as the linear velocity of ball contact point, the ball dished out is non-rotary.When upper wheel and ball contact point Linear velocity when being greater than the linear velocity of lower whorl and ball contact point, the ball dished out is upper rotation.When the linear speed of upper wheel and ball contact point When degree is less than lower whorl and the linear velocity of ball contact point, the ball dished out is backspin.The difference of the rotation of ball and above-mentioned two linear velocity at Direct ratio, and the difference of this two linear velocity can arbitrarily be set in suitable range independently of velocity of shuttle flight out.Such as While upper wheel linear velocity is reduced certain value by lower whorl linear velocity increase identical value will only change the swing of ball out without Change velocity of shuttle flight out.This method was once substantially meeting people over the years, especially amateurish table tennis love Requirement of the good person to table tenning ball servicing machine.But in recent years with the development of table tennis technology and racket characteristic.Table tennis of racing is transported The swing of ball, three-dimensional rotation direction and velocity of shuttle flight in dynamic, the combination range of heading is increasing, and form is more next It is more complicated.Above-mentioned toss technology cannot achieve these complicated rotations and flight configuration.Such as profession and have it is medium more than The rotation that horizontal amateur pulls out is extremely strong and the lower upper rotation height of velocity of shuttle flight hangs hook-shot, in close-table lateral incision Nearly net short ball of the very low pole backspin of flying speed caused by new technology tieback hook-shot etc..The reason is that toss shown in Fig. 1 fills The linear velocity of two toss wheels and ball contact point is all (to define this towards output direction of ball and rotate in the forward direction for toss wheel) in setting.I.e. two The direction of rotation of wheel is fixed, although can have the revolving speed of a wheel is zero.The toss method be can get at this time in ball Maximum ball rotation degree out under the premise of flying speed is identical.But it is clear that this is equivalent to the working method of single toss wheel toss.From For the angle for improving table tennis rotary degree, more wheel ball-projecting devices that toss wheel rotates in the forward direction are not improved compared with single-wheel device.Ball Flying speed it is same when, the swing for rotating in the forward direction the ball that more wheel apparatus are dished out never is greater than the ball that single-wheel device is dished out Swing.

Summary of the invention

Still illustrate the present invention by taking the parallel two-wheel device of the rotary shaft of two toss wheels as an example now.

Fig. 2 shows toss method of the invention.Upper wheel can be rotated along 1 direction of arrow in figure, or be rotated along 3 direction of arrow, Or it does not rotate.Lower whorl can be rotated along 2 direction of arrow, or be rotated along 4 direction of arrow, or not rotate that (defining this can be with for toss wheel It is rotated along positive negative direction).Obviously when equally going out velocity of shuttle flight, the more wheel apparatus of positive and negative rotation relatively rotate in the forward direction more wheel apparatus or The swing range of single-wheel device, the ball dished out obtains great extension.Fig. 3 is that the special case of toss method shown in Fig. 2 is shown It is intended to, the height that the top sports players that can dish out easily pull out, which hangs or adds, turns hook-shot.Fig. 4 is another toss method of the invention Schematic diagram, the top sports players' flying speed caused by lateral incision new technology tieback hook-shot that can dish out easily it is very low extremely under Revolve nearly net short ball.When velocity of shuttle flight is identical, this toss method can even dish out more current table tennis technology and racket The stronger ball of the swing for the ball that can be got.

Exemplary description disclosed above and legend, the shaft and horizontal plane of each toss wheel are parallel to each other, this is only to lift Example illustrates this patented technology.Not representing this patented technology can apply and the limitation of claim.Such as when each in legend When the shaft and horizontal plane of toss wheel are not parallel, this patented technology is same for the projectile of the table tennis containing sidespin component Applicable.It declares hereby.

Claims

The toss method of (two or more) 1. more than one toss wheel table tennis casting device, it is characterized in that: in toss wheel at least There is a toss wheel using the working method of positive and negative bidirectional rotation defined in present specification.