CN107837522A - Tennis training machine - Google Patents
Tennis training machine Download PDFInfo
- Publication number
- CN107837522A CN107837522A CN201711204163.1A CN201711204163A CN107837522A CN 107837522 A CN107837522 A CN 107837522A CN 201711204163 A CN201711204163 A CN 201711204163A CN 107837522 A CN107837522 A CN 107837522A
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- CN
- China
- Prior art keywords
- tennis
- serve
- push pedal
- collecting net
- main rope
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/38—Training appliances or apparatus for special sports for tennis
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B47/00—Devices for handling or treating balls, e.g. for holding or carrying balls
- A63B47/02—Devices for handling or treating balls, e.g. for holding or carrying balls for picking-up or collecting
- A63B47/025—Installations continuously collecting balls from the playing areas, e.g. by gravity, with conveyor belts
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
- A63B69/406—Stationarily-arranged devices for projecting balls or other bodies with rotating discs, wheels or pulleys gripping and propelling the balls or bodies by friction
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
- A63B69/407—Stationarily-arranged devices for projecting balls or other bodies with spring-loaded propelling means
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
- A63B2069/402—Stationarily-arranged devices for projecting balls or other bodies giving spin
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/02—Tennis
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Toys (AREA)
Abstract
The present invention discloses a kind of tennis training machine,Belong to sports equipment technical field,Tennis training machine,Including collecting net,The biography buckle device set below collecting net,Collecting net end is provided with return of serve shell,Buckle device is passed to be horizontally installed on below collecting net,Pass the ground below buckle device and be provided with bounce-back net corresponding with the outlet of return of serve shell,Pass buckle device tail end and be provided with corresponding conveyer belt higher than head end and tail end side,Transmission tape feeding direction tilts upward setting,Guide rail is provided with below the transmission end of conveyer belt,Guide rail head and end is provided with difference in height,Guide rail end is provided with rotary chuck,Fibre optical sensor is provided with rotary chuck,Rotary chuck and the stepper motor of lower section connect,The electrical control gear being connected with rotary chuck is provided with below guide rail end,The device of the present invention can receive ball automatically,Service,Return of serve,It is stable to receive ball,Not by windage,Serve speed is convertible,Return of serve variable-angle,Automaticity is high.
Description
Technical field
The invention belongs to sports equipment technical field, and in particular to tennis training machine.
Background technology
Because tennis beginner is unskilled to the shot of tennis racket, does not fix, cause square stance action yielding, from
And the position batted, rotation, direction, strength control are bad, beginner is needed by a large amount of training and exercise, during exercise
Practitioner is also required to spend certain strength to go to pick up ball, and this can undoubtedly increase the fatigue after training degree of beginner, be unfavorable for beginner
Exercising net playing skill is skilful, and wastes time and energy, and exercise efficiency is low, at present, although in the market is in the presence of the service for being exclusively used in tennis training
Machine, but this kind equipment is mostly costly, and fault rate is higher, and operation is also complex, is not suitable for college teaching and uses.
The content of the invention
It is an object of the invention to provide one kind can receive ball, service, return of serve automatically, receive ball stabilization, not by windage, hair
Ball speed variable changes, variable-angle of returning serve, the high tennis training machine of automaticity.
The scheme taken to achieve the above object of the present invention is：Tennis training machine, including collecting net, collecting net lower section are set
The biography buckle device put, collecting net end are provided with return of serve shell, pass buckle device and are horizontally installed on below collecting net, pass below buckle device
Ground is provided with bounce-back net corresponding with the outlet of return of serve shell, passes buckle device tail end and is provided with corresponding pass higher than head end and tail end side
Band is sent, transmission tape feeding direction tilts upward setting, is provided with guide rail below the transmission end of conveyer belt, guide rail head and end is provided with
Difference in height, guide rail end are provided with rotary chuck, and the stepper motor of fibre optical sensor, rotary chuck and lower section is provided with rotary chuck
Connection, guide rail end lower section are provided with the electrical control gear being connected with rotary chuck, and the device will can be impacted onto collecting net
Tennis, which is collected into, to be passed on buckle device, passes buckle device and the tennis of collection is sent into conveyer belt, transmitted tennis by conveyer belt paramount
The guide rail at place, tennis are tumbled to guide rail tail end in guide rail and collected by rotary chuck, and the fibre optical sensor in rotary chuck is simultaneously
Detecting and transmit signals to electrical control gear, electrical control gear transmits signal operation stepper motor, falls tennis, and
And when trainer is very big by power of the tennis impact to collecting net top and impact, tennis falls tennis after rise by return of serve shell
To bounce-back net, the effect that tennis is netted through rebounding is fought back carries out return of serve training at trainer for it, whole to collect, serve a ball and return serve
Process is simple and quick, without trainer carry out it is any pick up ball exercise make.
Preferably, passing spiral-lock is set to conveyer mechanism, the transmission belt surface of conveyer mechanism is slightly larger than net provided with aperture
The ball of bulb diameter, pass buckle device lateral surface and be provided with baffle plate, the tennis being collected into is transmitted using conveyer mechanism, pass button
Buncher is provided with below device to control the transfer rate of conveyer mechanism, particularly more than the tennis training person and batting amount is big
When can accelerate to pass the speed of service of buckle device by buncher, set baffle plate to prevent tennis from passing through passing buckle device side
Fall on and passed outside buckle device under after collecting net collection.
Preferably, being provided with PLC in electrical control gear, PLC is connected with fibre optical sensor and stepper motor respectively, in net
Fibre optical sensor detects to fall to have tennis in clamp corresponding to rotary chuck after ball falls into rotary chuck, transmits signals to electrically
PLC in control device, PLC are rotated by output pulse signal Driving Stepping Motor, rotate rotary chuck, realize that tennis turns
It is dynamic to fall, impacted for trainer, whole process is few by ectocine without manual operation.
Preferably, collecting net is made up of main rope and secondary rope braiding, pair rope is inclined at main rope both sides, and angle of inclination is
28 ° ~ 45 °, secondary restrict for the main rope side that the pair of main side of restricting is restricted and main rope is adjacent is cross-linked, the pair rope of main opposite side of restricting and master
The secondary end portion connection of the adjacent main rope side of rope opposite side, main rope and secondary restrict of both sides form feathery structure, using the knot
The collecting net of the formation of structure by tennis when being impacted, the stretchable deformation Dissipated energy of secondary rope section of the end connection on collecting net
Amount, and the stretching variable amount of the secondary rope of end connection is big, the energy absorption energy of tennis is strengthened, while pass through intersection
The secondary rope of braiding ensures that the severe bends deformation a large amount of impulsive forces that absorb tennis of collecting net when by tennis prevent collecting net
Rupture, and the sectional area for the secondary rope being cross-linked can increase, and at the same time, collecting net is to the energy absorption of tennis with pair rope
Sectional area increase and increase, pass through formula, W in formulaaFor collecting net dissipation energy,
R is average nettle diameter, MpFor nettle section Limited Plasticity moment of flexure, angles of the α between nettle, preferably inclining for major-minor nettle
Rake angle is 28 ° ~ 45 °, takes the collecting net of above-mentioned angular range braiding big to the energy absorbing device of tennis, particularly multiple
The more preferable effect for also creating flat of dissipation when tennis impacts collecting net, effectively reduces tennis and is collecting the rotation of net surface,
The abrasion between tennis and collecting net is reduced, power consumption of the collecting net to tennis can reach more than 87.3%, realize that collecting net is quickly inhaled
Energy caused by tennis impact is received, tennis impact collecting net is effectively solved and the situation of resilience occurs.
Preferably, main wearing for both sides intermittent of rope connects latex band, latex band undulate is arranged on main rope, latex band
1/2-3/4 be arranged inside main rope, be connected with tungsten filament between the latex band of both sides inside main rope, the latex set on main rope
Band can increase the sectional area and deformability and then the energy consumption effect for improving main rope of main rope, when main rope is impacted by tennis,
Main rope deforms upon, and now internal latex band deforms upon simultaneously and stretches tungsten filament, and the latex band outside main rope is into main rope
Contraction distortion is produced, realizes the sectional area increased inside main rope, and the energy absorbed is concentrated on tungsten filament, in this process
Tungsten filament and latex band produce deformation absorption tennis and impact caused ability, and tennis hits the air rotation that collecting net produces noise
Whirlpool declines on the collecting net of feathery structure, and collecting net is decreased obviously to windage caused by wind, improves collecting net to tennis
Power consumption, ensures the collecting effect of tennis, prevents resilience and because resilience occurs in windage.
Preferably, rotary chuck is made up of rotating disk, clamp and thrust device, clamp is circumferentially positioned at around rotating disk, phase
Thrust device is provided between adjacent clamp, and thrust device spacer ring collects tennis simultaneously around being arranged on rotating disk using rotary chuck
Tennis is driven to trainer to pat scope and make tennis fall using gravity and inertia when rotary chuck rotates and realizes service,
Breaktest is carried out for trainer or tennis beginner etc., and what the thrust device being provided with can accelerate tennis goes out ball speed, interval
Thrust device is set to use ball speed speed and be varied from, ability is seen clearly in the vision of intensive training person and the sense of hearing, tempers instruction
The harmony of white silk person, make its shot specification.
Preferably, thrust device includes preceding push pedal, preceding push pedal is separately positioned on adjacent clamp inwall, preceding push pedal one end
The preceding push pedal being fixedly connected with clamp upper inside wall, push pedal after the other end connection of preceding push pedal, the angle of rear push pedal and preceding push pedal
For 50 ° -150 °, rear push pedal end is provided with spheroid, and spheroid is located at clamp lower surface, and spheroid is connected with fluid bag by spring,
Fluid bag is located at disc surfaces, and fluid bag surface middle part is provided with fibre optical sensor, when tennis is transferred on rotary chuck through guide rail
When, tennis is fallen between the clamp on rotary chuck, clamp inwall setting before and after push pedal can make tennis in the moment fallen into
Tennis is fixed on clamp bottom, tennis fall caused by power be converted to extruding force and expand the angle of front and rear push pedal, pusher
Plate moves to disc surfaces, and extrusion spring, and in extrusion spring, the liquid position in fluid bag, which returns, to change, also convenient
Light sensor detects the presence of tennis entrance, and the accumulation of energy of the spring when rotary chuck rotates below tennis can be with tennis position
Change and change, the liquid distribution position in fluid bag also can with rotary chuck rotate and change, when tennis is downward
Gravity with rotary chuck reduce when, and fluid bag is slid downwards with rotary chuck, utilizes the accumulation of energy in spring and liquid
The downward gravity of body bag and tennis self gravitation are realized ejects rotary chuck by tennis, during ejection, fluid bag
Liquid distribution situation differs the situation for occurring that ejection dynamics differs, and the rotary speed of ball is also different, realizes
Different serve speeds and launch angle, the flexibility of training is increased, the vision and the sense of hearing for improving trainer see clearly ability, are not required to
Training mate is wanted to improve " feel of the ball " of trainer.
Preferably, the length ratio of preceding push pedal and rear push pedal is 3-4:1, preceding plate surfaces are evenly equipped with the bounce-back film of circle,
Clockwork spring is provided with inside bounce-back film, when preceding push pedal receives tennis extruding, the bounce-back film on its surface can be squeezed power and deform
Film is set indent occur, while indent, the clockwork spring meeting accumulation of energy inside the film that rebounds, when spring and fluid bag make what is launched to tennis
The film surface pressure that rebounds simultaneously is released, and the clockwork spring inside the film that rebounds releases energy and the film meeting spirogyrate that rebounds is paired
The extrapolability of tennis, net can be made because the uniform bounce-back film evagination surrounding time point of preceding plate surfaces is inconsistent when extrapolation
There is rotary motion in ball, realizes the service of different rotation rates, chooses the length ratio of preceding push pedal and rear push pedal to prevent pusher
Plate crosses ambassador's thrust device to extruding force caused by spring and " stuck " phenomenon occurs, and spring and fluid bag can be ensured to tennis
The ejection effect of realization.
Preferably, return of serve shell afterbody is arc, demarcation strip, demarcation strip and return of serve shell afterbody inwall are provided with the middle part of return of serve shell
Spacing be 2-3 times of tennis diameter, the elastic plate provided with arc above return of serve shell afterbody inwall, when trainer's striking force compared with
When big or batter's box is fallen above collecting net, tennis can enter in return of serve shell, and tennis makees return of serve fortune along return of serve shell inwall
Dynamic, when tennis, tennis collides with elastic plate and accelerates spheroid motion after demarcation strip, spheroid is quickly fallen on bounce-back online
Fight back to trainer, make its return practicing, and the position-adjustable for the net that rebounds, you can control return of serve angle, it can meet not
Trainer with demand carries out return of serve exercise.
Compared with prior art, beneficial effects of the present invention are：1）Return of serve training, and angle of returning serve can be provided for trainer
Degree is adjustable, meets that the trainer of different demands carries out return of serve exercise；2）To realize and collect, serve a ball and return serve, process is simple and quick,
Without trainer carry out it is any pick up ball exercise make, improve trainer's practice effect；3）Reliable and stable collection tennis, solves tennis
There is the situation of resilience in impact collecting net, and can reduce the influence of noise and wind-force to collecting net when tennis hits net；4）It is real
Showing different serve speeds and launch angle, increase the flexibility of training, the vision and the sense of hearing for improving trainer see clearly ability,
Training mate is not needed to improve " feel of the ball " of trainer.
Brief description of the drawings
Fig. 1 is the tennis training machine schematic diagram of the present invention；
Fig. 2 is collecting net partial schematic diagram of the present invention；
Fig. 3 is the main rope partial sectional view of the present invention；
Fig. 4 is the rotary chuck schematic diagram of the present invention；
Fig. 5 is the thrust device schematic diagram of the present invention；
Fig. 6 is the return of serve shell schematic internal view of the present invention.
Description of reference numerals：1. collecting net；101. main rope；101a. latex bands；101b. tungsten filament；102. pair rope；2. return of serve
Shell；201. elastic plate；202. demarcation strip；3. conveyer belt；4. guide rail；5. rotary chuck；501. thrust device；Push pedal before 501a.；
Push pedal after 501b.；501c. spring；501d. fluid bag；501e. bounce-back films；501f. clockwork spring；501g. fibre optical sensor；502.
Clamp；503. rotating disk；6. stepper motor；7. electrical control gear；8. pass buckle device；9. buncher；10. rebound net；11. net
Ball.
Embodiment
The present invention is described in further detail with accompanying drawing with reference to embodiments：
Embodiment 1：
As shown in Fig. 1,5,6, tennis training machine, including collecting net 1, the biography buckle device 8 that the lower section of collecting net 1 is set, the end of collecting net 1
Portion is provided with return of serve shell 2, passes buckle device 8 and is horizontally installed on the lower section of collecting net 1, the ground for passing the lower section of buckle device 8 is provided with and return of serve
Shell 2 exports corresponding bounce-back net 10, biography buckle device 8 tail end conveyer belt, conveyer belt provided with corresponding to higher than head end and tail end side
Conveying direction tilts upward setting, is provided with guide rail 4 below the transmission end of conveyer belt, the head and end of guide rail 4 is provided with difference in height, led
The end of rail 4 is provided with rotary chuck 5, and fibre optical sensor 501g, rotary chuck 5 and the stepper motor 6 of lower section are provided with rotary chuck 5
Connection, the end of guide rail 4 lower section are provided with the electrical control gear 7 being connected with rotary chuck 5.
Biography buckle device 8 is conveyer mechanism, and the transmission belt surface of conveyer mechanism is provided with aperture slightly larger than tennis diameter
Ball, pass the lateral surface of buckle device 8 and be provided with baffle plate, the tennis 3 being collected into is transmitted using conveyer mechanism, pass buckle device 8
Lower section is provided with buncher 9 to control the transfer rate of conveyer mechanism, and particularly more than the tennis training person and batting amount is big
When can accelerate to pass the speed of service of buckle device 8 by buncher 9, set baffle plate to prevent tennis 3 passing buckle device 8 side
Fall on and passed outside buckle device 8 under after the collection of collecting net 1.
PLC is provided with electrical control gear 7, PLC is connected with fibre optical sensor 501g and stepper motor 6 respectively, in tennis 3
Fall into fibre optical sensor 501g after rotary chuck 5 and detect and fall to have tennis 3 corresponding to rotary chuck 5 in clamp 502, signal is passed
The PLC being handed in electrical control gear 7, PLC are rotated by output pulse signal Driving Stepping Motor 6, make 5 turns of rotary chuck
It is dynamic, realize that tennis 3 rotates and fall, impacted for trainer, whole process is few by ectocine without manual operation.
The afterbody of shell 2 of returning serve is arc, and the middle part of return of serve shell 2 is provided with demarcation strip 202, demarcation strip 202 and the return of serve afterbody inwall of shell 2
Spacing be preferably 2 times of tennis diameter, the elastic plate 201 of arc is provided with above the return of serve afterbody inwall of shell 2, when trainer bats
Strength is larger or when batter's box is fallen above collecting net 1, and tennis 3 can enter in return of serve shell 2, and tennis 3 is along in return of serve shell 2
Wall makees return of serve motion, and when tennis 3, tennis 3 and elastic plate 201 collide and accelerate spheroid motion after demarcation strip 202, make ball
Body quickly falls on bounce-back net 10 and fights back to go out to trainer, makes its return practicing, and the position-adjustable for the net 10 that rebounds, you can
Control return of serve angle, can meet that the trainer of different demands carries out return of serve exercise.
Embodiment 2：
As shown in Figure 2,3, the present embodiment is further optimized on the basis of embodiment 1：Collecting net 1 is by main rope 101 and secondary rope
102 braiding compositions, pair rope 102 are inclined at 101 both sides of main rope, and angle of inclination is preferably 38 °, the secondary rope of 101 sides of main rope
102 are cross-linked with the secondary rope 102 of the 101 adjacent sides of main rope 101 of main rope, secondary rope 102 and the main rope of 101 opposite sides of main rope
102 ends of the secondary rope connection of the adjacent side of main rope 101 of 101 opposite sides, main rope 101 and the secondary rope 102 of both sides form featheriness
Structure, using the structure formation collecting net 1 when being impacted by tennis 3, the secondary rope 102 of end on collecting net 1 connection
The stretchable deformation dissipation energy in part, and the stretching variable amount of the secondary rope 102 of end connection is big, to the energy absorption of tennis 3
Energy is strengthened, while ensures that severe bends of the collecting net 1 when by tennis 1 deform by the secondary rope 102 of interlacing
A large amount of impulsive forces for absorbing tennis 3 prevent collecting net 1 from rupturing, and the sectional area for the secondary rope 102 being cross-linked can increase, with this
Meanwhile collecting net 1 increases with the sectional area increase of secondary rope 102 energy absorption of tennis 3, passes through formula, W in formulaaFor collecting net dissipation energy, r is average nettle diameter, MpCut for nettle
Face Limited Plasticity moment of flexure, the angle of inclination of angles of the α between nettle, preferably major-minor nettle is 38 °, takes above-mentioned angle model
Enclose that the collecting net of braiding is big to the energy absorbing device of tennis 3, the particularly dissipation when multiple tennises 3 impact collecting net 1 is more preferable
The effect of flat is also created, rotation of the tennis 3 on the surface of collecting net 1 is effectively reduced, reduces between tennis 3 and collecting net 1
Abrasion, power consumption of the collecting net 1 to tennis 3 can reach more than 87.3%, realize collecting net 1 quickly absorbs tennis 3 impact it is caused
Energy, effectively solve the impact collecting net 1 of tennis 3 and the situation of resilience occur.
Wearing for 101 both sides intermittents of main rope meets latex band 101a, and latex band 101a undulates are arranged on main rope 101,
Latex with 101a 1/2 be arranged at it is main rope 101 inside, it is main rope 101 inside both sides latex band 101a between be connected with tungsten filament
101b, the latex set on main rope 101 can increase the sectional area and deformability and then the main rope of raising of main rope 101 with 101a
101 energy consumption effect, when impact of the main rope 101 by tennis 3, main rope 101 deforms upon, now internal latex band 101a
Deform upon simultaneously and stretch tungsten filament 101b, the latex band 101a outside main rope 101 produces contraction distortion into main rope 101, real
Now increase the sectional area of the main inside of rope 101, and the energy of absorption is concentrated on tungsten filament 101b, tungsten filament 101b in this process
With latex band 101a produce deformation absorb tennis 3 impact caused by ability, tennis 3 hit collecting net 1 generation noise sky
Cyclone whirlpool declines on the collecting net 1 of feathery structure, and collecting net 1 is decreased obviously to windage caused by wind, and it is right to improve collecting net 1
The power consumption of tennis 3, ensure the collecting effect of tennis 3, prevent resilience and because resilience occurs in windage.
The latex band 101a of the present invention is prepared by following preparation technology, is taken by weight：900 parts of latax, pure water
220 parts, 30 parts of glacial acetic acid, 2 parts of oleic acid, 50 parts of titanium dioxide, 10 parts of potassium hydroxide, 2 parts of ammoniacal liquor, 0.01 part of triethylamine, diethyl
0.7 part of hydramine, 0.2 part of casein, 0.4 part of bentonite, 3 parts of dispersant, 0.34 part of accelerator, 15 parts of zinc oxide, 6 parts of silicone oil,
8 parts of antioxidant, 0.003 part of mould inhibitor, 7 parts of sulphur, 8 parts of talcum powder, wherein dispersant, accelerator, antioxidant and mould proof
Agent is bought by market, is inserted after above-mentioned material is allocated in retort, is obtained mixed glue solution, by mixed glue solution filtering and extruder head
Aperture flows into glass tube in thread, inserts in acetic acid groove and disengages moisture shaping, flat containing 0.3wt%D- in the acetic acid in acetic acid groove
The mixture of peach acid methyl esters and L- methyl mandelates, obtain rubber latex thread and cleaned using hot water, rubber latex thread is carried out after the completion of cleaning
Drying and processing, rubber latex thread is carried out being spliced into latex band by the rubber latex thread of drying by stone flour machine bread, then spliced band machine, will be spelled
The latex band connect carries out fluidized hot processing through fluidized furnace, and the fluidisation time is 15min, and temperature control is at 110 DEG C -130 DEG C, after taking-up
Quickly cooled down using cooling cylinder, obtain latex band 101a, the mass ratio of D- methyl mandelates and L- methyl mandelates is 62：3, in vinegar
The mixture of addition has to the association between the side chain amino acid in chitosan molecule and silk gum structure and improved in acid tank
Effect, efficiently solves chitosan and the generation hydrogen bond upset of the heterocoagulation blending emulsion system of silk gum graft and natural emulsion is whole
The problem of crystal habit of body, the latex band 101a for preparing gained have good telescopicing performance, and the thickness of latex band can be quick
Regulation, preparing, there is tiny micropore to make latex band 101a by retractable variable when impact inside the latex band 101a of formation
The air swirl for increasing and producing noise during to being impacted has good assimilation effect.
Embodiment 3：
As shown in Figure 4,5, the present embodiment further prioritization scheme on the basis of embodiment 1 is：Rotary chuck 5 by rotating disk 503,
Clamp 502 and thrust device 501 are formed, and clamp 502 is circumferentially positioned at around rotating disk 503, and thrust is provided between adjacent clamp 502
Device 501, and the spacer ring of thrust device 501 collects tennis 3 using rotary chuck 5 and works as revotating card around being arranged on rotating disk 503
Tennis 3 is driven to trainer to pat scope and make tennis 3 fall using gravity and inertia when disk 5 rotates and realizes service, for instruction
White silk person or tennis beginner etc. carry out breaktest, and what the thrust device 501 being provided with can accelerate tennis 3 goes out ball speed, interval
Thrust device 501 is set to use ball speed speed and be varied from, ability is seen clearly in the vision of intensive training person and the sense of hearing, is taken exercise
The harmony of trainer, make its shot specification.
Thrust device 501 includes preceding push pedal 501a, and preceding push pedal 501a is separately positioned on the adjacent inwall of clamp 502, preceding to push away
Push pedal after the preceding push pedal 501a that plate 501a one end is fixedly connected with the upper inside wall of clamp 502, preceding push pedal 501a other end connection
501b, rear push pedal 501b and preceding push pedal 501a variable angle scope are 50 ° -150 °, and rear push pedal 501b ends are provided with spheroid, ball
Body is located at the lower surface of clamp 502, and spheroid is connected with fluid bag 501d by spring 501c, and fluid bag 501d is located at rotating disk 503
Surface, fluid bag 501d surface middle parts are provided with fibre optical sensor 501g, when tennis 3 is transferred on rotary chuck 5 through guide rail 4,
Tennis is fallen between the clamp 502 on rotary chuck 5, before and after the setting of clamp 502 inwall push pedal can fall into tennis 3
Moment makes tennis 3 be fixed on the bottom of clamp 502, tennis 3 fall caused by power be converted to extruding force and make the angle of front and rear push pedal
Expand, rear push pedal 501b moves to the surface of rotating disk 503, and extrusion spring 501c, in extrusion spring 501c, in fluid bag 501d
Liquid position return change, also facilitate light sensor 501g to detect the presence of tennis 3 and enter, when rotary chuck 5 rotates
The spring 501c of the lower section of tennis 3 accumulation of energy can change, the liquid distribution position in fluid bag 501d with the change of the position of tennis 3
Putting also can be as rotary chuck 5 rotates and changes, when the downward gravity of tennis 3 reduces with rotary chuck 5, and liquid
Body bag 501d slides downwards with rotary chuck 5, utilizes the gravity and net that the accumulation of energy in spring 501c and fluid bag 501d are downward
The self gravitation of ball 3 is realized ejects rotary chuck 5 by tennis 3, during ejection, fluid bag 501d liquid distribution situation
Differ the situation for occurring that ejection dynamics differs, and the rotary speed of ball is also different, realizes different serve speeds
And launch angle, the flexibility of training is increased, the vision and the sense of hearing for improving trainer see clearly ability, it is not necessary to which training mate can carry
" feel of the ball " of high trainer.
Preceding push pedal 501a and rear push pedal 501b length ratio preferably 3:1, preceding push pedal 501a surfaces are evenly equipped with the anti-of circle
Film 501e is played, clockwork spring 501f is provided with inside bounce-back film 501e, when preceding push pedal 501a receives tennis 3 and extruded, the bounce-back on its surface
Film 501e, which can be squeezed power and deform, makes film indent occur, while indent, the clockwork spring 501f inside the film 501e that rebounds
Meeting accumulation of energy, the film 501e surfaces pressure that rebounded while spring 501c and fluid bag 501d is launched tennis 3 are released
To put, the clockwork spring 501f inside bounce-back film 501e releases energy and the extrapolability for the film 501e meeting paired tennises 3 of spirogyrate that rebound,
Can occur tennis 3 because the uniform bounce-back film 501e evaginations surrounding time point in preceding push pedal 501a surfaces is inconsistent when extrapolation
Rotary motion, realizes the service of different rotation rates, after the preceding push pedal 501a of selection and rear push pedal 501b length ratio is to prevent
Push pedal 501b crosses ambassador's thrust device 501 to extruding force caused by spring 501c and " stuck " phenomenon occurs, and can ensure spring
The ejection effect that 501c and fluid bag 501d realizes to tennis 3.
Embodiment 4：
When the present apparatus actually uses：Impact to the tennis 3 on collecting net 1 is collected into and passed on buckle device 8, passing buckle device 8 will receive
The tennis 3 of collection is sent to conveyer belt, and tennis 3 is transferred to the guide rail 4 of eminence by conveyer belt, and tennis 3 is tumbled in guide rail 4 to leading
Rail tail end is collected by rotary chuck 5, and the fibre optical sensor 501g in rotary chuck 5 is detected simultaneously and transmitted signals to electric-controlled
Device 7 processed, electrical control gear 7 transmit signal operation stepper motor 6, fall tennis 3, and when trainer hits tennis 3
When the power got to the top of collecting net 1 and impacted is very big, tennis 3 makes tennis 2 fall after rise to the net 10 that rebounds, net by return of serve shell 2
Effect of the ball 3 through the net 3 that rebounds is fought back carries out return of serve training at trainer for it, and whole collection, service and return of serve process are simple
Quickly, without trainer carry out it is any pick up ball exercise make.
Embodiment 5：
For the tennis training machine of the checking present invention, choose Zhejiang Ocean university 2016 grades of tennis volleyball sports, 4 arts classes and 4
Science class, it is using object for 8 teaching 214 students of class, randomly selects 2 arts classes, 2 science classes are experimental group, separately
Outer 2 arts classes and 2 science classes are control group, and every classmate is investigated, it is found that most of classmate does not have before this
Overpass campaign is contacted, is beginner, but it is interested all to tennis（Device is as shown in table 1 using object situation）, in upper half
Mid-March phase is 8 class to teaching experiment, school hour is carried out by the end of April, wherein being 45min per the class time.
The device of table 1 uses object basic condition table
| Group | Man | Female | It is total |
| Experimental group | 56 | 52 | 108 |
| Control group | 52 | 54 | 106 |
Experimental group student is practised in teaching using the tennis training machine of the present invention, and control group student is in teaching using normal
Rule teaching method is imparted knowledge to students.
Student is examined at the end of school hour, examination item is estimation Tennis Federation（ITF）Defined hair
Ball, which acts, swings the bat, waves the actions such as impact, return of serve is examined, and each project 10 is divided, and total score 100 is divided, and is sent out after examination
It is existing, the student of experimental group integral into good performance in control group student's entirety achievement, and in experimental group best result with minimum point and compareing
Best result and the minimum point of presence of group necessarily divide difference, and two composition achievements are as shown in table 2.
The experimental group of table 2 and control group achievement situation
| Total marks of the examination | Average mark | Highest achievement | Minimum achievement |
| Experimental group | 88.6 | 98 | 69.5 |
| Control group | 79.4 | 92 | 62.5 |
It can be seen that carrying out teaching use to student using the tennis training machine of the present invention, be advantageous to improve the tennis level of student and learn
Speed is practised, training student is not limited only to be used for student instruction to the interest of tennis, the certainly tennis training machine of the present invention, can also
For training athlete, amusement etc..
The prior art of routine techniques dawn known to those skilled in the art in above-described embodiment, thus it is no longer detailed herein
Description.
It should be understood that above-described embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After the content of the invention described has been read, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (9)
1. tennis training machine, including collecting net（1）, collecting net（1）The biography buckle device that lower section is set（8）, it is characterised in that：It is described
Collecting net（1）End is provided with return of serve shell（2）, the biography buckle device（8）It is horizontally installed on collecting net（1）Lower section, pass buckle device（8）
The ground of lower section is provided with and shell of returning serve（2）Bounce-back net corresponding to outlet（10）, pass buckle device（8）Tail end is higher than head end and tail end
Side is provided with corresponding conveyer belt, and the transmission tape feeding direction tilts upward setting, is provided with below the transmission end of conveyer belt
Guide rail（4）, the guide rail（4）Head and end is provided with difference in height, the guide rail（4）End is provided with rotary chuck（5）, rotary chuck
（5）It is interior to be provided with fibre optical sensor（501g）, the rotary chuck（5）With the stepper motor of lower section（6）Connection, the guide rail（4）
End lower section is provided with and rotary chuck（5）The electrical control gear of connection（7）.
2. tennis training machine according to claim 1, it is characterised in that：Pass buckle device（8）For conveyer mechanism, the biography
The transmission belt surface of tape-feed is provided with the ball that aperture is slightly larger than tennis diameter, passes buckle device（8）Lateral surface is provided with baffle plate.
3. tennis training machine according to claim 1, it is characterised in that：The electrical control gear（7）It is interior to be provided with PLC,
The PLC respectively with fibre optical sensor（501g）And stepper motor（6）Connection.
4. tennis training machine according to claim 1, it is characterised in that：The collecting net（1）By main rope（101）Restricted with pair
（102）Braiding composition, the secondary rope（102）It is inclined at main rope（101）Both sides, angle of inclination are 28 ° ~ 45 °, the main rope
（101）The secondary rope of side（102）With main rope（101）Adjacent main rope（101）The secondary rope of side（102）It is cross-linked, the master
Rope（101）The secondary rope of opposite side（102）With main rope（101）The adjacent main rope of opposite side（101）The secondary rope of side（102）End connects
Connect.
5. tennis training machine according to claim 4, it is characterised in that：The main rope（101）Wearing for both sides intermittent connects
Latex band（101a）, latex band（101a）Undulate is arranged at main rope（101）On, the latex band（101a）1/2-3/4
It is arranged at main rope（101）Inside, main rope（101）The latex band of internal both sides（101a）Between be connected with tungsten filament（101b）.
6. tennis training machine according to claim 1, it is characterised in that：The rotary chuck（5）By rotating disk（503）, card
Plate（502）And thrust device（501）Composition, the clamp（502）It is circumferentially positioned at rotating disk（503）Around, adjacent clamp（502）
Between be provided with thrust device（501）, and thrust device（501）Spacer ring is around being arranged in rotating disk（503）On.
7. tennis training machine according to claim 6, it is characterised in that：The thrust device（501）Including preceding push pedal
（501a）, the preceding push pedal（501a）It is separately positioned on adjacent clamp（502）On inwall, preceding push pedal（501a）One end and clamp
（502）The preceding push pedal that upper inside wall is fixedly connected（501a）, preceding push pedal（501a）The other end connection after push pedal（501b）, pusher
Plate（501b）With preceding push pedal（501a）Angle be 50 ° -150 °, it is described after push pedal（501b）End is provided with spheroid, and spheroid is located at
Clamp（502）Lower surface, the spheroid pass through spring（501c）It is connected with fluid bag（501d）, the fluid bag（501d）Position
In rotating disk（503）Surface, the fluid bag（501d）Surface middle part is provided with fibre optical sensor（501g）.
8. tennis training machine according to claim 7, it is characterised in that：The preceding push pedal（501a）With rear push pedal（501b）
Length ratio be 3-4:1, the preceding push pedal（501a）Surface is evenly equipped with the bounce-back film of circle（501e）, the bounce-back film（501e）
Inside is provided with clockwork spring（501f）.
9. tennis training machine according to claim 1, it is characterised in that：The return of serve shell（2）Afterbody is arc, described time
Spherical shell（2）Middle part is provided with demarcation strip（202）, the demarcation strip（202）With shell of returning serve（2）The spacing of afterbody inwall is tennis diameter
2-3 times, return serve shell（2）The elastic plate of arc is provided with above afterbody inwall（201）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204163.1A CN107837522A (en) | 2017-11-27 | 2017-11-27 | Tennis training machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204163.1A CN107837522A (en) | 2017-11-27 | 2017-11-27 | Tennis training machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107837522A true CN107837522A (en) | 2018-03-27 |
Family
ID=61680317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711204163.1A Pending CN107837522A (en) | 2017-11-27 | 2017-11-27 | Tennis training machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107837522A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110465059A (en) * | 2019-08-23 | 2019-11-19 | 沈阳建筑大学 | A kind of Tennis net frame with tennis collecting function |
| CN115317880A (en) * | 2022-09-23 | 2022-11-11 | 河南农业职业学院 | Auxiliary training device for basketball skills |
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| CN206454235U (en) * | 2017-01-09 | 2017-09-01 | 雷庆福 | A kind of tennis ball serving device of physical education |
| CN206543385U (en) * | 2017-02-23 | 2017-10-10 | 南京工业职业技术学院 | A kind of tennis serve machine of net service |
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| DE3108083A1 (en) * | 1981-03-04 | 1982-09-16 | Johann 3000 Hannover Zwaka | Service wall for tennis or the like |
| DE3405902A1 (en) * | 1984-02-18 | 1985-08-22 | Merkt, Hildegard, 7240 Horb | Ball serving machine |
| JP2005000579A (en) * | 2003-06-16 | 2005-01-06 | Takayuki Ebinuma | Table tennis serve practice apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110465059A (en) * | 2019-08-23 | 2019-11-19 | 沈阳建筑大学 | A kind of Tennis net frame with tennis collecting function |
| CN115317880A (en) * | 2022-09-23 | 2022-11-11 | 河南农业职业学院 | Auxiliary training device for basketball skills |
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Application publication date: 20180327 |