CN108159666B - Table tennis rotary drills all-in-one machine - Google Patents

Table tennis rotary drills all-in-one machine Download PDF

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Publication number
CN108159666B
CN108159666B CN201810126700.3A CN201810126700A CN108159666B CN 108159666 B CN108159666 B CN 108159666B CN 201810126700 A CN201810126700 A CN 201810126700A CN 108159666 B CN108159666 B CN 108159666B
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ball
frame
transverse slat
axle sleeve
vernier
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CN108159666A (en
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张兴海
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Yanshan University
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Yanshan University
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B67/00Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
    • A63B67/04Table games physically beneficial for the human body, modelled on outdoor sports, e.g. table tennis

Abstract

A kind of table tennis rotary rehearsal all-in-one machine comprising pivoted frame mechanism, hanger mechanism and air-flow frame mechanism, the right transverse slat middle part of pivoted frame mechanism and the pneumatic device lower end of hanger mechanism are connected, and the end face at right transverse slat both ends is connected with two column lower ends of hanger mechanism respectively;The end face at the left transverse slat both ends of pivoted frame mechanism is connect with two upright bar lower ends of air-flow frame mechanism respectively, is connect in the middle part of the middle plate of pivoted frame mechanism with the cylinder lower end of air-flow frame mechanism.The present invention can intuitively demonstrate sphere rotary course and changing rule, various form work can be assisted again, to, deepen understanding of the trainee to table tennis rotary and the characteristics of motion, excite learning interest, develop skill practice effect, can in a short time fast understanding and grasp table tennis technology, it can make teaching means more specification, science, there is practical significance to table tennis teaching effect is improved.

Description

Table tennis rotary drills all-in-one machine
Technical field
The present invention relates to a kind of sports apparatus, in particular to a kind of table tennis drills machine.
Background technique
In table tennis teaching and training, in order to allow student to understand the universal law of table tennis, master a skill as early as possible dynamic Make, frequently with demonstration instrument and exercising machine assisted learning.Currently, being used for the demonstration instrument of table tennis technology theory study and being used for The exercise-equipment type of form work is more, and table tennis demonstration instrument type mainly has: table tennis ball flying path demonstrator (patent Number: 201120251860.4), table tennis coordinate axis demonstrator (patent No.: 201120251509.5) with table tennis power change Change demonstrator (patent No.: 201420368781.5) etc., these instruments are mainly the study for assisting student's table tennis technology theory, Allow student that can intuitively understand table tennis rotary changing rule.Table tennis practising device tool type mainly has: the hair of various models Ball machine, such as two ball-type table tennis practising devices (patent No.: 201320295787.X), roller table tennis practising device (patent No.: 201220714485.7), swing device for table tennis forehand attack (patent No.: 201110277679.5), oscillating-type table tennis practice Device (patent No.: 201510334970.X) and table tennis friction exercising machine (patent No.: 201610187941.X) etc., these white silks It practises device and mainly assists the practice of student's table tennis technology, student can master a skill as soon as possible movement.These instrument Shortcomings It is: has a single function, lacks the synthesis instrument that can be used for the demonstration of table tennis technology theory but also ancillary technique practice.
Summary of the invention
It is an object of the invention to propose a kind of to be used for table tennis technology theory demonstration ancillary technique is practiced again Table tennis rotary drills all-in-one machine.
The invention mainly comprises pivoted frame mechanism, hanger mechanism and air-flow frame mechanisms, wherein in the middle part of the right transverse slat of pivoted frame mechanism It is connected with the pneumatic device lower end of hanger mechanism, the end face at right transverse slat both ends is connected with two column lower ends of hanger mechanism respectively; The end face at the left transverse slat both ends of pivoted frame mechanism is connect with two upright bar lower ends of air-flow frame mechanism respectively, in the middle plate of pivoted frame mechanism Portion is connect with the cylinder lower end of air-flow frame mechanism;
The pivoted frame mechanism includes: square tube, big vernier, upper clamp plate, lower clamp plate, cube pipe, vertical pivot, axle sleeve, perpendicular ball, circular arc Frame, right transverse slat, left transverse slat, middle plate, upper gusset and lower gusset, wherein square tube and big vernier are socketed, and big vernier is equipped with positioning spiral shell Silk, square tube both ends respectively with one end of two cubes of pipes be connected, the other end of two cubes of pipes respectively with two lower clamp plates one End is connected relatively, and the other end of lower clamp plate is equipped with fixing bolt, one end of two upper clamp plates middle part with two cubes of pipes respectively It is connected relatively, the other end of upper clamp plate is free end;Big vernier upper end and one end of vertical pivot are connected, and are cased with axle sleeve in vertical pivot, Axle sleeve is equipped with circular hole, and the vertical pivot both ends in axle sleeve are equipped with bearing and are respectively equipped with fastening spiral shell on the vertical pivot at both ends outside axle sleeve Mother, the other end of vertical pivot are connect with perpendicular ball;One jiao of two lower gussets is connected with axle sleeve lower end respectively, two upper one jiao point of gussets Be not connected with axle sleeve upper end, other two angle of the upper gusset of two lower gussets and two respectively and meanwhile with two circular arc frame lower surfaces It is connected;Two circular arc frame both ends are connected with above-mentioned right transverse slat and left transverse slat both ends respectively, middle board ends respectively with the transverse slat one that keeps left Two circular arc framves of side are fixedly connected to the inner side.
The axle sleeve is equipped with circular hole, covers and is equipped with groove corresponding with circular hole on the vertical pivot in axle sleeve, limit adjustment The positioning pin of device passes through the circular hole of axle sleeve, and the end of positioning pin is inserted in the groove on vertical pivot.
The hanger mechanism includes: balladeur train, pneumatic device, hanging ball, lifting rope, small vernier, screw rod, inner sleeve, outer tube, perpendicular trip Mark, crossbearer and column, wherein crossbearer both ends are connect with the upper end of two columns respectively, and being respectively equipped on two columns can be upper and lower The perpendicular vernier of sliding erects vernier and is equipped with fixed screw, and the outside of two perpendicular verniers is connected with one end of two outer tubes respectively, The other end of two outer tubes is socketed with one end of inner sleeve respectively, and is screwed, the other end point of two inner sleeves It is not connected with balladeur train;Balladeur train is equipped with slideway, and two small verniers are socketed on the slideway of balladeur train, is equipped with spiral shell on two small verniers Bar is connect on two screw rods respectively with one end of two lifting ropes, and the other end of two lifting ropes is connected with two hanging balls respectively;It is located at The switch with speed shelves is set on pneumatic device in the middle part of right transverse slat, one end of conducting wire is connect with pneumatic device, and the other end and plug connect It connects.
The air-flow frame mechanism include: cylinder, square plate, the longitudinal axis, vertical ball, long arrow shaft, round frame, arrow, short arrow shaft, vertical bar, Upright bar, horizontal axis and horizontal ball, wherein the upper end for the cylinder being located on middle plate and square plate lower end are connected, the one of the inside of square plate and the longitudinal axis End is connected, and the other end of the longitudinal axis is connect with vertical ball, and the outside upright of square plate is successively connected with the rod end of three long arrow shafts, three long Arrow shaft one end with the arrow is connected with the side of round frame respectively, the round frame other side vertically successively with the arrow with three short arrow shafts one End is connected, and the rod end and vertical bar of three short arrow shafts are connected, and lays in the round frame between three long arrow shafts and three short arrow shafts There are two the arrows that can be turned;The sphere of horizontal ball is ball cover, and horizontal ball is equipped with central through hole, and horizontal axis passes through horizontal ball center Through-hole, both ends are equipped with horizontal axis and hold in the ball of horizontal axis for passing through central through hole, and the outer both ends of ball are equipped with fastening nut, horizontal axis Both ends respectively be located at left transverse slat both ends end face on two upright bars upper end be connected.
The vertical ball is identical with perpendicular spherical structure, and center is equipped with circular hole, the both ends of the vertical pivot and the longitudinal axis that are inserted into circular hole It is equipped with small bearing, sphere circle set is outer to be surrounded by one layer of crust.
In the use of the present invention, all-in-one machine is fixed in the middle part of table tennis table by upper clamp plate and lower clamp plate, according to practice Or demo content adjusts the position of big vernier, and is fixed by positioning screw, is rotated further by circular arc frame, passes through limit after adjusting good position Position adjuster is fixed.
When imparting knowledge to students using hanger mechanism secondary presentation, by the centre of two hanging ball of air port center alignment of pneumatic device, make two Lob it is stationary after, power on, start pneumatic device.Wind speed is placed on first blocks slowly, and two balls are attracting and rotational case for observation. Then the case where again wind speed being adjusted to block fastly, then observing attracting two balls at this time and rotation.At this moment it can be observed that two ball rotations Attracting in the process and long-time maintains the experimental phenomenas such as this attracting position.Explain that " flow velocity is faster, pressure in conjunction with this phenomenon is demonstrated Strong smaller, flow velocity is slower, and pressure is bigger " table tennis hydrodynamics pressure difference principle, allow trainee intuitively to understand table tennis Flight rule in rotary course.
When using hanger mechanism auxiliary exercise, two perpendicular verniers are turned up and are fixed, inner sleeve is elongated, and is fixed.Again Two small verniers are transferred to balladeur train two sides respectively, two lifting rope tune are long, it allows hanging ball to be in and facilitates impact position.Use forehand attack Or technology impact hanging ball practice of backhanding attack, form work can also be carried out in conjunction with paces.
When being imparted knowledge to students using air-flow frame mechanism secondary presentation, round frame demonstrates circulation phenomenon, and round frame upward arrow indicates Direction of circulation, Long arrow shaft indicates the sphere direction of motion, and short arrow shaft indicates air drag direction, and horizontal axis demonstrates Y-axis, and horizontal ball is rotated around this axis Demonstrate top spin and chop.It is explained in conjunction with demonstration, Y-axis is by the centre of sphere and the perpendicular axis of table tennis heading.Ball Top spin is rotated to be before this axial direction, ball rotates to be chop after this axial direction.
When demonstrating the top spin characteristics of motion, arrow is turned, it is directed toward counterclockwise, rotates horizontal ball, make it Along being rotated before X direction.Then, it is explained in conjunction with demonstration, at this moment the rotation property of horizontal ball is upper rotation, is formed around horizontal ball With the circulation rotated with it, such as: circulation of the round frame as gas.Horizontal ball top is due to encountering air drag direction and Direction of circulation shape At convection current, so flow velocity is slow, horizontal ball lower part due to encountering air drag direction and Direction of circulation forms fair current, so flow velocity is fast. According to the bernoulli equation in hydrodynamics: flow velocity is faster, and pressure is smaller, and flow velocity is slower, and pressure is bigger.Therefore on top spin Portion's pressure is big, and lower part pressure is small, upper and lower pressure difference occurs, makes ball in movement arc trajectory in " dive " state, such as: circular arc frame Top spin motion profile can be regarded as.
When demonstrating the chop characteristics of motion, arrow is turned, it is directed toward clockwise, rotates horizontal ball, make it Along horizontal axis back rotation.Then, it is explained in conjunction with demonstration, at this moment the rotation property of horizontal ball is backspin, is formed around horizontal ball With the circulation rotated with it.At this moment, horizontal ball top forms fair current due to encountering air drag direction and Direction of circulation, so flow velocity Fastly, horizontal ball lower part forms convection current due to encountering air drag direction and Direction of circulation, so flow velocity is slow.According in hydrodynamics Known to bernoulli equation: flow velocity is faster, and pressure is smaller, and flow velocity is slower, and pressure is bigger.Therefore chop top pressure is small, lower part pressure It is powerful, there is upper and lower pressure difference, makes ball in movement arc trajectory in " upwarping " state.
When imparting knowledge to students using vertical ball secondary presentation, vertical ball is allowed by up time or to rotate in an anti-clockwise direction around the longitudinal axis.Then, in conjunction with drilling Show explanation antero posterior axis concept, antero posterior axis: it is the axis parallel with the heading of ball by the centre of sphere.Ball is around this axis by clockwise Direction rotates to be running ball, and ball rotates to be inverse spiral around this axis counterclockwise.
When using air-flow frame mechanism auxiliary exercise, it can use impact or inverse spiral or running ball sent out in the vertical ball that rubs, practice; The screw of one end upright bar lower end can also be unloaded, then terminal screw under cylinder is unloaded, it can be by (the circle of coupling part above cylinder Column, square plate, length arrow shaft, vertical ball and round frame) it unloads, then the screw of upright bar lower end is screwed on again.At this moment it can use horizontal ball Practice various technologies, such as: acting impact with forehand attack or the horizontal ball that rubs is practiced, with movement impact or the horizontal ball that rubs of backhanding attack Practice etc..
When being imparted knowledge to students using perpendicular ball secondary presentation, turning perpendicular ball with hand rotates it to the left or to the right along vertical pivot, then, knot It costars and shows explanation, vertical pivot is upper and lower axle, and perpendicular ball is rotated along upper and lower axle, and the rotation property at this moment erecting ball is side spin.It is logical Cross the centre of sphere and the perpendicular axis of table top.On the basis of striker, ball is rotated to the left as left side spiral, and ball rotates to the right as right side rotation Ball.
When being practiced using perpendicular ball, big vernier can be moved on to and be fixed after cube pipe, it is perpendicular using racket friction or impact Ball practices reverse twist service technology.
The invention has the following advantages over the prior art:
1, structure is simple, easy to use.All-in-one machine can be fixed on billiard table by the upper clamp plate and lower clamp plate of pivoted frame mechanism, Big vernier can move in square tube, facilitate all-in-one machine entirety transverse shifting;Vertical pivot and axle sleeve are set on big vernier, can be made upper and lower Gusset and circular arc frame facilitate circular arc frame to demonstrate sphere difference flight line around vertical axis, facilitate the horizontal ball of adjustment and hanging ball Position;Perpendicular ball is set on vertical pivot, can be demonstrated perpendicular ball along vertical axis phenomenon, to explain being left side spiral, can be revolved for right side Ball.
2, the small vernier of hanger mechanism moves on balladeur train, the position for facilitating adjustment to lob.It is assisted using two hanging balls, it can To carry out impact hanging ball practice;It is assisted, can be demonstrated attracting equal existing during two ball rotations using two hanging balls and pneumatic device As to explain the flight rule during table tennis rotary.
3, the horizontal ball of air-flow frame mechanism can be rotated around horizontal axis, can demonstrate the upper and lower rotary motion phenomenon of table tennis.Circle Frame and frame upward arrow can demonstrate table tennis ambient gas circulation phenomenon, and long and short arrow bar, which can be demonstrated in table tennis, meets The phenomenon that air drag.With explain can as chop, can be top spin and the upper chop characteristics of motion;Vertical ball can be around vertical Axis rotation can demonstrate table tennis along rotation phenomenon clockwise or counterclockwise, and to explain being running ball, what is inverse rotation Ball;Coupling part above cylinder is laid down, can strike or rub horizontal ball, practice forehand attack or technology of backhanding attack.
4, sphere rotary course and changing rule and the various form work of auxiliary can intuitively be demonstrated.To deepen Understanding of the trainee to table tennis rotary and the characteristics of motion excites learning interest, and develop skill practice effect, can be Fast understanding and grasp table tennis technology in short time;It can make teaching means more specification, science, to raising table tennis teaching effect With practical significance.
Detailed description of the invention
Three-dimensional simplified schematic diagram Fig. 1 of the invention;
Fig. 2 is that Fig. 1 erects A-A of ball and axle sleeve part to cross-sectional view;
Fig. 3 is B-B of the horizontal ball portion of Fig. 1 to cross-sectional view;
Fig. 4 is application schematic diagram of the invention.
In figure, 1- plug, 2- conducting wire, 3- balladeur train, the right transverse slat of 4-, 5- switch, the pneumatic device of 6-, 7- hanging ball, 8- lifting rope, 9- are small Vernier, 10- screw rod, 11- inner sleeve, 12- outer tube, 13- erect vernier, 14- crossbearer, 15- column, 16- circular arc frame, the upper angle 17- Plate, 18- nut, 19- vertical pivot, 20- erect ball, 21- indulges ball, the 22- longitudinal axis, 23- square plate, 24- long arrow shaft, 25- round frame, 26- instruction The horizontal ball of arrow, 27-, 28- horizontal axis, the short arrow shaft of 29-, 30- vertical bar, 31- upright bar, the left transverse slat of 32-, plate, 34- cylinder, 35- in 33- Lower gusset, 36- limit adjuster, 37- axle sleeve, the big vernier of 38-, 39- square tube, 40- upper clamp plate, 41- bolt, 42- lower clamp plate, 43- cubes of pipe, 44- bearing, the small bearing of 45-, 46- crust, 47- circle covers, 48- horizontal axis is held, 49- ball cover.
Specific embodiment
In table tennis rotary rehearsal all-in-one machine simplified schematic diagram shown in Fig. 1, square tube 39 and big vernier 38 are socketed, big vernier Be equipped with set screw, square tube both ends respectively with one end of two cubes of pipes 43 be connected, the other end of two cubes of pipes respectively with One end of two lower clamp plates 42 is connected relatively, and the other end of lower clamp plate is equipped with fixing bolt 41, one end point of two upper clamp plates 40 Not opposite with the middle part of two cubes of pipes to be connected, the other end of upper clamp plate is free end;Big vernier upper end and the one of vertical pivot 19 End is connected, as shown in Fig. 2, being cased with axle sleeve 37 in vertical pivot, axle sleeve is equipped with circular hole, and the vertical pivot both ends covered in axle sleeve are equipped with axis It holds 44 and is respectively equipped with fastening nut 18 on the vertical pivot at both ends outside axle sleeve, the other end of vertical pivot is connect with perpendicular ball 20;It covers in axle sleeve Interior vertical pivot is equipped with groove corresponding with circular hole, and the positioning pin of limit adjuster 36 passes through the circular hole of axle sleeve, positioning pin End is inserted in the groove on vertical pivot;One jiao of two lower gussets 35 is connected with axle sleeve lower end respectively, two upper 17 1 jiaos of gussets It is connected respectively with axle sleeve upper end, other two angle of two lower gussets and two upper gussets is respectively simultaneously and under two circular arc framves 16 Surface is connected;Two circular arc frame both ends respectively with the both ends of right transverse slat 4 and left transverse slat 32 be connected, 33 both ends of middle plate respectively with keep left Two circular arc framves of transverse slat side are fixedly connected to the inner side;
The both ends of crossbearer 14 are connect with the upper end of two columns 15 respectively, two column lower ends respectively with right transverse slat both ends End face is connected, and the perpendicular vernier that can be slided up and down is respectively equipped on two columns, erects vernier and is equipped with fixed screw, two perpendicular trips Be connected respectively with one end of two outer tubes 12 on the outside of target, the other end of two outer tubes respectively with an end cap of inner sleeve 11 It connects, and is screwed, the other end of two inner sleeves is connected with balladeur train 3 respectively;Balladeur train is equipped with slideway, two small verniers 9 are socketed on the slideway of balladeur train, are equipped with screw rod 10 on two small verniers, one end with two lifting ropes 8 respectively on two screw rods Connection, the other end of two lifting ropes are connect with two hanging balls 7 respectively;It is located on the pneumatic device 6 in the middle part of right transverse slat and sets band speed shelves Switch 5, one end of conducting wire 2 connect with pneumatic device, and the other end is connect with plug 1.
The lower end of the upper end and square plate 23 that are located at the cylinder 34 on plate is connected, and the inside of square plate and one end of the longitudinal axis 22 are solid Even, the other end of the longitudinal axis is connect with vertical ball 21, and the outside upright of square plate is successively connected with the rod end of three long arrow shaft 24, three long Arrow shaft one end with the arrow is connected with the side of round frame 25 respectively, and the round frame other side is successively with the arrow with three short arrow shaft 29 vertically One end be connected, the rod ends of three short arrow shafts and vertical bar 30 are connected, in the round frame between three long arrow shafts and three short arrow shafts It is laid with two arrows that can be turned 26;As shown in figure 3, the sphere of horizontal ball 27 is ball cover 49, during horizontal ball is equipped with Heart through-hole, horizontal axis 28 pass through horizontal ball center's through-hole, and both ends are equipped with horizontal axis and hold 48 in the ball of horizontal axis for passing through central through hole, ball Outer both ends are equipped with fastening nut, the both ends of horizontal axis respectively be located at left transverse slat both ends end face on two upright bars 31 upper end It is connected, the lower end of two upright bars is connected with the end face at left transverse slat both ends respectively.
The vertical ball is identical with perpendicular spherical structure, and center is equipped with circular hole, the both ends of the vertical pivot and the longitudinal axis that are inserted into circular hole It is equipped with small bearing 45, is surrounded by one layer of crust 46 outside sphere circle set 47.
As shown in figure 4, when in use, all-in-one machine is fixed in the middle part of table tennis table by upper clamp plate and lower clamp plate, according to Practice or demo content adjust the position of big vernier, and are fixed by positioning screw, are rotated further by circular arc frame, lead to after adjusting good position Limit adjuster is crossed to fix.

Claims (2)

1. a kind of table tennis rotary drills all-in-one machine comprising pivoted frame mechanism, hanger mechanism and air-flow frame mechanism, feature exist Be connected in the middle part of the right transverse slat of: pivoted frame mechanism with the pneumatic device lower end of hanger mechanism, the end face at right transverse slat both ends respectively with hanger Two column lower ends of mechanism are connected;The end face at the left transverse slat both ends of pivoted frame mechanism is respectively and under two upright bars of air-flow frame mechanism The middle plate middle part of end connection, pivoted frame mechanism is connect with the cylinder lower end of air-flow frame mechanism;
The pivoted frame mechanism include: square tube, big vernier, upper clamp plate, lower clamp plate, cube pipe, vertical pivot, axle sleeve, perpendicular ball, circular arc frame, Right transverse slat, left transverse slat, middle plate, upper gusset and lower gusset, wherein square tube and big vernier are socketed, and big vernier is equipped with set screw, Square tube both ends are connected with one end of two cubes of pipes respectively, the other end of two cubes of pipes one end phase with two lower clamp plates respectively To being connected, the other end of lower clamp plate is equipped with fixing bolt, and one end of two upper clamp plates is opposite with the middle part of two cubes of pipes respectively It is connected, the other end of upper clamp plate is free end;Big vernier upper end and one end of vertical pivot are connected, and are cased with axle sleeve, axle sleeve in vertical pivot It is equipped with circular hole, the vertical pivot both ends in axle sleeve is covered and is equipped with bearing and be respectively equipped with fastening spiral shell on the vertical pivot at both ends outside axle sleeve Mother, the other end of vertical pivot are connect with perpendicular ball;One jiao of two lower gussets is connected with axle sleeve lower end respectively, two upper one jiao point of gussets Be not connected with axle sleeve upper end, other two angle of the upper gusset of two lower gussets and two respectively and meanwhile with two circular arc frame lower surfaces It is connected;Two circular arc frame both ends are connected with above-mentioned right transverse slat and left transverse slat both ends respectively, middle board ends respectively with the transverse slat one that keeps left Two circular arc framves of side are fixedly connected to the inner side;
The axle sleeve is equipped with circular hole, covers and is equipped with groove corresponding with circular hole on the vertical pivot in axle sleeve, limits adjuster Positioning pin passes through the circular hole of axle sleeve, and the end of positioning pin is inserted in the groove on vertical pivot;
The hanger mechanism include: balladeur train, pneumatic device, hanging ball, lifting rope, small vernier, screw rod, inner sleeve, outer tube, perpendicular vernier, Crossbearer and column, wherein crossbearer both ends are connect with the upper end of two columns respectively, and downslide can be gone up by being respectively equipped on two columns Dynamic perpendicular vernier erects vernier and is equipped with fixed screw, and the outside of two perpendicular verniers is connected with one end of two outer tubes respectively, and two The other end of a outer tube is socketed with one end of inner sleeve respectively, and is screwed, the other end difference of two inner sleeves It is connected with balladeur train;Balladeur train is equipped with slideway, and two small verniers are socketed on the slideway of balladeur train, is equipped with spiral shell on two small verniers Bar is connect on two screw rods respectively with one end of two lifting ropes, and the other end of two lifting ropes is connected with two hanging balls respectively;It is located at The switch with speed shelves is set on pneumatic device in the middle part of right transverse slat, one end of conducting wire is connect with pneumatic device, and the other end and plug connect It connects;
The air-flow frame mechanism include: cylinder, square plate, the longitudinal axis, vertical ball, long arrow shaft, round frame, arrow, short arrow shaft, vertical bar, upright bar, Horizontal axis and horizontal ball, wherein the upper end for the cylinder being located on middle plate and square plate lower end are connected, the inside of square plate and one end of the longitudinal axis are solid Even, the other end of the longitudinal axis is connect with vertical ball, and the outside upright of square plate is successively connected with the rod end of three long arrow shafts, three long arrow shafts One end with the arrow is connected with the side of round frame respectively, and the round frame other side is successively solid with three short arrow shafts one end with the arrow vertically Even, the rod end of three short arrow shafts and vertical bar are connected, and are laid with two in the round frame between three long arrow shafts and three short arrow shafts A arrow that can be turned;The sphere of horizontal ball is ball cover, and horizontal ball is equipped with central through hole, and horizontal axis is logical across horizontal ball center Hole, both ends are equipped with horizontal axis and hold in the ball of horizontal axis for passing through central through hole, and the outer both ends of ball are equipped with fastening nut, and the two of horizontal axis End respectively be located at left transverse slat both ends end face on two upright bars upper end be connected.
2. table tennis rotary according to claim 1 drills all-in-one machine, it is characterised in that: the vertical ball and perpendicular spherical structure phase Together, center is equipped with circular hole, and the both ends of the vertical pivot and the longitudinal axis that are inserted into circular hole are equipped with small bearing, and sphere circle set is outer to be surrounded by one Layer crust.
CN201810126700.3A 2018-02-08 2018-02-08 Table tennis rotary drills all-in-one machine Active CN108159666B (en)

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CN108159666B true CN108159666B (en) 2019-06-25

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CN112435547B (en) * 2020-11-24 2021-08-17 燕山大学 Table tennis dynamic rotation demonstration instrument

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US20130053191A1 (en) * 2011-08-24 2013-02-28 Wei Lin LU Multi-Function Table
CN202263369U (en) * 2011-10-20 2012-06-06 燕山大学 Table tennis trainer with double rotatable balls
CN102512795B (en) * 2011-12-30 2014-08-20 哈尔滨师范大学 Ping-pong ball return drop point training device with two-dimensional simulating system
CN205028520U (en) * 2015-10-15 2016-02-10 燕山大学 Table tennis rotation axis full court demonstration appearance
CN106512360B (en) * 2016-11-25 2018-11-30 林国胜 A kind of table tennis attacking driving teaching exercise machine
CN206730435U (en) * 2017-05-11 2017-12-12 山东省产品质量检验研究院 A kind of spontaneous ball soldier pang ball training station

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