a ball-serving device

Abstract

The invention provides a ball-serving device, which effectively solves the problem that the existing ball-serving machine cannot spin the ball at high speed, and the track speed of the table tennis ball is difficult to control; A U-shaped plate is fixed on the right side of the vertical plate, and table tennis balls are placed in the U-shaped plate. There are large gears on the front and rear side plates of the U-shaped plate, and there is a rotating shaft in the U-shaped plate. The pinion gear is fixed on the side of the big gear far away from the table tennis ball with a coaxial spline cylinder, and the end of the spline cylinder away from the table tennis ball is fixed with a worm gear. There is a horizontal worm screw corresponding to the worm gear in the housing cavity. Active rotation; the spline barrel is inserted with a spline shaft that can slide along its axial direction, a splint is fixed on the end of the spline shaft close to the table tennis ball, and a compression spring is installed between the splint and the big gear. The splint can clamp the table tennis ball under the action of the compression spring; a hole is provided on the right side plate of the casing, and the table tennis ball can pass through the hole.

Description

technical field [0001] The invention relates to the technical field of sports training, in particular to a ball-serving device. Background technique [0002] Spinning is the most difficult, complex and difficult style of play. All athletes hope to master the way of playing and catching this kind of ball. At present, most of the serving machines used on the market are double-roller serving machines, and its core components are two rollers whose interval is slightly larger than the diameter of table tennis balls or table tennis balls. When working, the two rollers rotate counterclockwise at high speed. When the ping-pong ball passes through the gap between the two rollers, it will generate friction with the surface of the rollers due to pressure, and will be released from the ball-serving mechanism under the action of the friction. This design structure is simple, and if the rotational speeds of the two rollers are controlled to be different, the top spin or the bottom spin o...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a ball serving device, which effectively solves the problem that the existing ball serving machine cannot spin the ball at high speed, and the trajectory speed of the table tennis ball is difficult to control.

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