CN108635803B

CN108635803B - Tennis training machine

Info

Publication number: CN108635803B
Application number: CN201810443285.4A
Authority: CN
Inventors: 叶楠
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2018-05-10
Filing date: 2018-05-10
Publication date: 2020-04-03
Anticipated expiration: 2038-05-10
Also published as: CN108635803A

Abstract

The invention relates to the technical field of sports training equipment, in particular to a tennis training machine. The invention provides a tennis training machine, which comprises a ball supply device, a ball serving device, a power device and a control device, wherein the ball supply device, the power device and the control device are arranged on a vehicle body, the control device controls the power device to provide continuous power for the ball serving device, the ball supply device supplies tennis balls for the ball serving device, the vehicle body is provided with wheels for moving the vehicle body, the control device comprises a control panel, a single chip microcomputer is arranged in the control panel, a CPU arranged in the single chip microcomputer is respectively connected with a memory, a collector and a controller, the vehicle body is provided with a ball serving box body and a ball storage box, a ball serving pipe in the ball serving box body is provided with a piston and an air cylinder, and the CPU charges and discharges compressed air into the air. The tennis training system can train primary enthusiasts and train higher-level tennis enthusiasts in a state of simulating actual matches, and achieves the purposes of increasing tennis training antagonism and interestingness and reducing the number and physical strength of coaches and trainees.

Description

Tennis training machine

Technical Field

The invention belongs to the technical field of sports training equipment, and particularly relates to a tennis training machine.

Background

With the improvement of living standard, people pay more and more attention to physical training, many people enjoy playing tennis at present, because tennis sport has low popularity in China and lacks a large number of tennis coaches and trainers, tennis lovers often only can choose to practice by facing to a wall or installing tennis on a long rope when not having suitable training partner, for beginners, the practice mode is very limited for improving the level, the existing tennis coaches are rare, the working strength is high, the working time is long, and therefore an automatic tennis training machine for relieving the working strength of the coaches is urgently needed.

Disclosure of Invention

The invention provides a tennis training machine, wherein a serving box body and a tennis storage box are arranged on a movable vehicle body, tennis stored in the tennis storage box body enters a cylinder cavity formed in the serving box body through a conveying pipe, a piston is arranged in the cylinder cavity, a cylinder joint at the upper part of the cylinder cavity is connected with an air storage tank through an air pipe, after an outlet end of the air storage tank is provided with a second electromagnetic valve which is opened, a large amount of high-pressure air can be charged and discharged into the cylinder instantly to eject the tennis, the piston is pressed to the bottom of the cylinder cavity, a pressure spring is arranged at the bottom of the cylinder cavity, a lock tongue arranged on the side wall of the cylinder cavity controls the bouncing of the piston through an electromagnetic relay, a control panel arranged on the vehicle body and the firing speed, the interval time and the rotating direction of the tennis controlled by a singlechip are arranged on the vehicle body, and the purpose of simulating.

In order to achieve the above object, the present invention provides a tennis training machine, comprising a ball feeding device, a ball serving device, a power device and a control device, wherein the control device controls the power device to provide continuous power for the ball serving device, and the ball feeding device supplies tennis balls to the ball serving device;

the ball supply device comprises a funnel-shaped ball storage box, and the ball storage box is fixedly connected with the ball serving device through a conveying pipe;

the ball serving device comprises a ball serving box body, the top surface of the ball serving box body is respectively provided with an air cylinder connector and a conveying pipe, the conveying pipe is fixedly connected with the bottom of a ball storage box, a ball serving pipe which is transversely provided with a cylindrical structure is arranged in the ball serving box body, a ball ejecting part, an air cylinder, a ball falling part and a ball delivery part are sequentially arranged in the ball serving pipe, one end of the ball ejecting pipe extends out of one side of the ball serving box body, the other end of the ball serving pipe is a blind end and is fixedly connected to the side wall of the ball serving box body, the ball delivery part in the blind end is provided with a pressure spring, a piston is arranged on the pressure spring, the piston performs reciprocating motion in the ball falling part and the ball delivery part, and a;

the ball falling part in the ball serving pipe is connected with a conveying pipe for conveying tennis balls, and an air inlet pipe arranged in the downstream direction of the conveying pipe is connected with an air cylinder joint;

a first sensor connected with the control device is arranged on the lower side of the ball falling part;

a first through hole is formed in the side wall below the spring feeding part, a spring bolt which moves up and down back and forth is arranged in the first through hole, the spring bolt is fixedly connected with an electromagnetic relay arranged in the service box body, and the electromagnetic relay attracts the spring bolt to enable the spring bolt to move up and down back and forth;

the side wall of the cylinder is provided with a clamp spring for limiting the position of the shot tennis, the clamp spring is of an arc-shaped surface structure protruding outwards, and when the compressed air ejects the tennis, the clamp spring is pressed by the tennis to deform and is tightly attached to the inner wall of the cylinder;

the part of the ball serving tube extending out of the ball serving box body is provided with a fifth motor, an output shaft of the fifth motor is provided with a third gear, a port of the ball serving tube is provided with a sleeve, the inner wall of the sleeve is provided with a spring piece for changing the rotating direction of the shot tennis ball, the outer side of the sleeve is provided with a gear ring, and the gear ring is meshed with the third gear and used for controlling the rotation of the ball serving tube;

the power device comprises an air storage tank and an air pump which are arranged in the vehicle body and connected with each other through an air pipe, wherein a first electromagnetic valve, a second electromagnetic valve and a second sensor are arranged on the air storage tank;

the power device also comprises an external power supply and a storage battery arranged on one side of the air pump;

the control device comprises a control panel connected with a singlechip, a CPU arranged in the singlechip is respectively connected with a memory, a collector and a controller, and the collector is respectively connected with a first sensor and a second sensor; the controller is respectively connected with the first electromagnetic valve, the second electromagnetic valve, the electromagnetic relay and the battery jar.

Further, be equipped with the bottom plate between service box body and automobile body, be equipped with the ascending constant head tank of opening and the tooth's socket of fan-shaped structure on the bottom plate, tooth's socket and the first gear engagement on the second motor, second motor fixed connection is on the automobile body, the second motor is connected with the controller and is controlled by it and rotates, the location axle is connected to cartridge in the constant head tank, the constant head tank and the location axle swing joint on the automobile body, the location axle sets up the upper portion intermediate position at the automobile body.

Further, be equipped with the frame below the service tube in the service box body, the frame is fixed on the horizontal pole of service box internal wall, the frame is U type structure, the bottom of U type structure is fixed on the horizontal pole, the U type structure opening is down and the intermediate position through-hole of U type structure, and first motor outside rigid coupling has the pivot, and the pivot is passed the through-hole and is clearance fit structure with the through-hole, the output shaft of first motor stretches out and the output shaft suit of first motor is in the branch that the base was equipped with from the bottom of service box body, the output shaft of first motor is equipped with the external screw thread, and the bottom plate is fixed with the base, and the branch that is equipped with on the base is the tubular structure, be equipped with the internal thread in the tubular structure, the external screw thread of the output shaft of first motor is threaded connection with the internal thread of.

Furthermore, wheels for moving the trolley body are arranged at the bottom of the trolley body, a third motor is arranged in the center of each wheel, the third motors drive the wheels to move, and the third motors are connected with a controller.

Furthermore, a connecting rod is arranged between the wheels at the two same sides, teeth are arranged on the connecting rod and are meshed with a second gear, the second gear is fixedly connected with a fourth motor, and the fourth motor is fixedly connected with the vehicle body through a connecting support.

Further, the upper portion of service box body is equipped with the laser receiver who is connected with the controller, the port of laser receiver and service pipe all faces the net, the net both sides all are equipped with the net post, the bottom and the top of net post all are equipped with laser emitter.

Further, the elevation angle degree range of the service box body is set to be 135-180 degrees, and the depression angle degree range of the service box body is set to be 180-225 degrees.

Furthermore, marked lines are arranged on the ball serving tube and the sleeve, and when the sleeve rotates, the rotation angles of the tennis balls are adjusted by the two marked lines through the controller.

Furthermore, the bottom plate swings left and right by taking the positioning shaft as a circle center, and the swing angle value range of the bottom plate is 0 degree to +/-25 degrees.

Compared with the prior art, the invention has the following beneficial effects:

1. the tennis ball emitted by the invention is accurate in placement;

2. the invention can train the primary fans, can simulate the state of the actual match to train the high-level tennis fans, and has wider application range;

3. the invention has stronger antagonism and interestingness to tennis training; and simultaneously, the labor intensity of coaches and trainers is reduced.

Drawings

FIG. 1 is a perspective view of an embodiment 1 of the tennis training machine of the present invention;

FIG. 2 is a view showing the inner structure of the trigger state of the service box in the tennis training machine of embodiment 1 of the present invention;

FIG. 3 is a view showing the inner structure of a service box in the tennis training machine of example 1 according to the present invention in a service state;

FIG. 4 is a perspective view showing the external structure of a service box in the tennis training machine of example 1 according to the present invention;

FIG. 5 is a view showing the internal structure of the casing of the tennis training machine of example 1 according to the present invention;

FIG. 6 is an internal structure view of a vehicle body in an embodiment 1 of the tennis training machine of the present invention;

FIG. 7 is a perspective view of the bottom surface of the bottom plate of the tennis training machine of example 1 of the present invention;

FIG. 8 is a perspective view of another structure of a tennis training machine in accordance with an embodiment 1 of the present invention;

FIG. 9 is a perspective view of the bottom structure of the tennis training machine in accordance with example 1 of the present invention;

FIG. 10 is a perspective view of a fourth motor mounting structure in an embodiment 1 of the tennis training machine of the present invention;

FIG. 11 is a perspective view showing the structure of a net in the tennis training machine of embodiment 2 of the present invention;

FIG. 12 is a perspective view of a service box and a service tube in an embodiment 2 of the tennis training machine of the present invention.

Reference numerals

In the figure: 1-ball storage box; 2-a conveying pipe; 3-serving box body; 4-a bottom plate; 5-a vehicle body; 6-wheel; 7-power plug; 8-connecting rod; 9-gas source joint; 10-a control panel; 11-a bulb tube; 12-a cylinder joint; 13-pressure spring; 14-a first via; 15-a locking tongue; 16-an electromagnetic relay; 17-a first sensor; 18-a piston; 19-a sealing ring; 20-a cylinder; 21-a base; 22-a strut; 23-a first motor; 24-a clamp spring; 25-positioning grooves; 26-gullet; 27-a scaffold; 28-positioning the shaft; 29-a second motor; 30-a first gear; 31-a second solenoid valve; 32-a second sensor; 33-an air storage tank; 34-an air pump; 35-a battery jar; 36-a first solenoid valve; 37-wheel seat; 38-a third motor; 39-a laser receiver; 40-a laser emitter; 41-net; 42-a fourth motor; 43-a second gear; 44-connecting the stent; 45-a fifth motor; 46-a third gear; 47-a cannula; 48-spring leaf; 49-clamp column; 50-cutting sleeve; 51-a bearing; 52-marked line.

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1-10, the tennis training machine provided by the present invention comprises a ball feeding device, a ball serving device, a power device and a control device, wherein the control device controls the power device to provide continuous power for the ball serving device, and the ball feeding device provides tennis balls for the ball serving device; the ball supply device comprises a funnel-shaped ball storage box 1, and the ball storage box 1 is fixedly connected with the ball serving device through a conveying pipe 2; the bottom of the funnel-shaped structure is fixedly connected with the delivery pipe 2, the side wall of the funnel-shaped structure and the side wall of the service box body 3 are provided with reinforcing rods, and the reinforcing rods are used for reinforcing the fixation between the funnel-shaped structure and the service box body 3; in this embodiment, the vehicle body 5 is a rectangular box, four wheels 6 are oppositely disposed at the bottom of the vehicle body 5, and the wheels 6 can support the vehicle body 5 and move the vehicle body 5.

The structure of the device is as shown in fig. 2, the service device includes a service box body 3, the top surface of the service box body 3 is respectively provided with a cylinder joint 12 and a delivery pipe 2, the delivery pipe 2 is fixedly connected with the bottom of a ball storage box 1, a service pipe 11 of a transversely arranged cylindrical structure is arranged in the service box body 3, a ball shooting part, a cylinder 20, a ball dropping part and a ball sending part are sequentially arranged in the service pipe 11, one end of the service pipe 11 extends out from one side of the service box body 3, the other end of the service pipe 11 is a blind end and is fixedly connected to the side wall of the service box body 3, a pressure spring 13 is arranged in the ball sending part in the blind end, a piston 18 is arranged on the pressure spring 13, the piston 18 performs reciprocating motion in the ball dropping part and the ball sending part, and the piston 18 is sleeved; wherein, the upper side of the ball falling part in the service pipe 11 is connected with a conveying pipe 2 for conveying tennis balls, the conveying pipe 2 is arranged at the middle position of the service pipe 11, an air inlet pipe connected with an air cylinder joint 12 is arranged at the downstream direction of the conveying pipe 2, and the tennis balls are ejected after compressed air enters an air cylinder 20; a first sensor 17 connected with the controller is arranged at the lower side of the ball falling part and used for sensing whether tennis balls exist in the ball serving pipe 11 below the conveying pipe 2 when the piston 18 moves back and forth, and simultaneously transmitting data information to the CPU for processing through the collector;

wherein, the lateral wall downside below the portion is equipped with a first through-hole 14 to the bullet, hold in the first through-hole 14 and carry out up-and-down motion's spring bolt 15, the spring bolt 15 with set up the end fixed connection that stretches out of 16 work of electromagnetic relay in service box body 3, it is a cylinder to stretch out the end, electromagnetic relay 16 stretches out and is equipped with the spring on the cylinder of end, the spring is arranged spring bolt 15 in all the time and is waited to bounce the state, when electromagnetic relay 16 circular telegram, downwards inhale spring bolt 15, form the suction that draws to 16 position directions in electromagnetic relay, overcome the elasticity of spring, let spring bolt 15 form the motion from top to bottom. Wherein, the piston 18 can carry out the motion that reciprocates to cylinder 20 direction under the spring force effect of pressure spring 13, and when electromagnetic relay 16 outage, spring on the electromagnetic relay 16 bounces spring bolt 15, and the spring bolt 15 that bounces blocks the piston 18 that moves to the rear end, and electromagnetic relay 16 is connected with the controller simultaneously, and the controller is through the intercommunication power with close the power, controls opening and closing of electromagnetic relay 16, and electromagnetic relay 16 can control spring bolt 15 and carry out reciprocating motion from top to bottom in first through-hole 14.

As shown in fig. 3, 4 and 5, a pair of snap springs 24 are oppositely arranged on the side wall of the cylinder 20, and are used for limiting the position for ejecting the tennis ball, the snap springs 24 are arranged in the shape of an arc surface protruding outwards, and when the compressed air ejects the tennis ball, the snap springs 24 are pressed by the tennis ball to deform and cling to the inner wall of the cylinder 20; a fifth motor 45 is further arranged on the outer side of the service pipe 11, a third gear 46 is arranged on an output shaft of the fifth motor 45, a sleeve 47 is arranged at a port of the service pipe 11, a boss is arranged at one end of the sleeve 47, a bearing 51 which is installed in a tight fit manner is arranged in the boss, a clamping sleeve 50 is arranged in the bearing 51, a cylindrical clamping column 49 which can be bounced is arranged in the clamping sleeve 50, the clamping column 49 can enter the clamping sleeve 50 when being extruded by external force for installation, and the clamping column automatically bounces when the external force disappears; the end part of the extension tube 11 is provided with a clamping groove, the sleeve 47 is inserted on the tube 11, the clamping column 49 is clamped in the clamping groove, the fixed tube 11 is clamped with the sleeve 47, and the tube 11 and the sleeve 47 can be conveniently mounted and dismounted; a plurality of spring strips 48 are fixedly arranged on the inner wall of the sleeve 47, when a tennis ball is ejected from the sleeve 47, friction is generated on the side surface of the tennis ball to form resistance, the ejected tennis ball can rotate, each spring strip 48 is provided with an arc surface or a semicircular surface which extends outwards, the ejection amount of the arc surface of each spring strip 48 is 0.05 mm-0.15 mm, the number of the spring strips 48 is preferably 3, the spring strips are arranged in a front-back sequence, the ejection amount is 0.1mm, the spring strips 48 can apply resistance to the outer wall of the ejected tennis ball, so that the turning direction of the tennis ball is changed and the rotation speed of the tennis ball is changed, and the rotation speed can be adjusted and changed according to the elastic coefficient of the spring strips 48 and the number of the spring strips 48; in a preferable structure, a gear ring is further arranged on the outer side of the sleeve 47, the gear ring is meshed with a third gear 46 on an output shaft of the fifth motor 45, and when the fifth motor 45 rotates to drive the sleeve 47 to rotate, the sleeve 47 rotates integrally to change the rotating direction of the shot tennis; in addition, the outer sides of the ball-serving tube 11 and the sleeve 47 are also provided with marked lines 52, and when the sleeve 47 rotates, the two marked lines 52 are aligned or staggered, so that the rotation angle of the shot tennis ball can be adjusted; a user can rotate the sleeve 47 randomly according to needs, so that tennis balls can rotate in a corresponding direction at the fixed position of the sleeve 47, and single-item unidirectional training is performed; when the fifth motor 45 is started, the emitted tennis balls can rotate irregularly and in any direction, so that the training difficulty and the corresponding project training are increased.

As shown in fig. 6, the power device includes an air tank 33 and an air pump 34 which are arranged in the vehicle body 5, the air tank 33 is provided with a first electromagnetic valve 36, a second electromagnetic valve 31 and a second sensor 32, the second electromagnetic valve 31 is connected with the cylinder connector 12 through an air pipe, the first electromagnetic valve 36 is connected with an external air source, the external air source is connected with the first electromagnetic valve 36 through an air source connector 9 arranged on the side wall of the vehicle body 5, the air tank 33 is also connected with the air pump 34 through an air pipe, wherein a collector collects changes of pressure values of the air tank 33 through the second sensor 32, when the pressure in the air tank 33 is low and the air tank 33 cannot rapidly increase the air pressure through the external air source, the CPU controls the air pump 34 to start through the controller to supplement compressed air for the; the power device also comprises an external power supply and a storage battery 35 arranged on one side of the air pump 34, the storage battery 35 is connected with a controller of the control panel 10, the storage battery 35 is arranged as a standby power supply, a data acquisition unit in the control panel 10 acquires voltage and current data of the storage battery 35 in real time and transmits the data to the CPU, the CPU controls whether the controller charges the storage battery 35 according to the voltage and current data of the storage battery 35, and the control device is connected with the external power supply through a power plug 7 arranged on the side wall of the vehicle body 5; in this embodiment, the control device includes a control panel 10 connected to the single chip, a CPU provided in the single chip is connected to the memory, the collector, and the controller, respectively, (the CPU, the memory, the collector, and the controller are prior art, and are not described in detail in this embodiment) the collector is connected to the battery 35, the first sensor 17, and the second sensor 32, respectively; the controller is respectively connected with the first electromagnetic valve 36, the second electromagnetic valve 31, the electromagnetic relay 16, the first motor 23, the second motor 29, the third motor 38, the air pump 34, the fourth motor 42, the fifth motor 45 and the battery 35.

As shown in fig. 1, 7 and 8, the service box body 3 in this embodiment is arranged on the upper portion of the vehicle body 5, a bottom plate 4 is further arranged between the service box body 3 and the vehicle body 5, a positioning groove 25 and a toothed groove 26 with a sector structure are arranged below the bottom plate 4, the toothed groove 26 is meshed with a first gear 30 on an output shaft of a second motor 29, the vehicle body 5 is fixedly connected with the second motor 29, and the second motor 29 is connected with a controller and is controlled by the controller to rotate; the positioning groove 25 is movably connected with a positioning shaft 28 on the vehicle body 5, the positioning shaft 28 is inserted in the positioning groove 25, when the controller controls the second motor 29 to rotate forwards and reversely, the second motor 29 drives the first gear 30 to rotate in the tooth grooves 26, the bottom plate 4 can swing left and right by taking the positioning shaft 28 as a circle center, the range of the swing angle value of the bottom plate 4 is 0 degree to plus or minus 25 degrees, and the preferred degree is-25 degrees, -15 degrees, -10 degrees, -5 degrees, 0 degrees, 5 degrees, 10 degrees, 15 degrees or 25 degrees. Wherein, the CPU is used for controlling the second motor 29 to adjust the swing angle of the service box body 3 through the controller according to the swing angle value set in the memory.

Wherein, the preferred structure, as shown in fig. 1-3, the serving box body 3 is provided with a base under the serving tube 11, the base is fixed on a cross bar on the inner side wall of the serving box body 3, the base is of a U-shaped structure, the bottom of the U-shaped structure is fixed on the cross bar, the opening of the U-shaped structure faces downwards, a through hole is arranged at the middle position of the U-shaped structure, a rotating shaft is fixedly connected with the outer side of the first motor 23, the rotating shaft passes through the through hole and is in clearance fit with the through hole, so that the first motor 23 is movably connected with the base, the output shaft of the first motor 23 extends out from the bottom of the serving box body 3, the output shaft of the first motor 23 is provided with external threads, the output shaft of the first motor 23 is sleeved in a support rod 22 on the base 21, the support rod 22 is of a cylindrical structure, the cylindrical structure is provided, the base 21 is movably connected with the supporting rod 22, the base 21 is fixedly connected to the bottom plate 4, the controller controls the forward rotation and the reverse rotation of the first motor 23, an output shaft of the first motor 23 rotates forward and reversely in the supporting rod 22, and the service box body 3 is pushed upwards or pulled downwards to move;

as shown in fig. 1 and 7, the two sides of the service box body 3 are provided with protruding shafts, the protruding shafts pass through the through holes on the bracket 27, and swing by taking the protruding shafts connected with the bracket 27 as the center of circle, so that the ball outlet of the service pipe 11 can be raised or lowered. Wherein, when the first motor 23 rotates, the lifting of one end of the service box body 3 is realized; when the controller makes the first motor 23 rotate reversely, the service box body 3 will pull the service box body 3 downwards with the convex shaft as the center of circle; when the first motor 23 is powered off and does not work, the first motor 23 keeps the service box body 3 still; when the controller makes the first motor 23 rotate forward, the service box body 3 pushes the service box body 3 upwards by taking the convex shaft as the center of a circle; in this embodiment, the pitch angle of the service box 3 is set according to the length of the external thread provided on the output shaft of the first motor 23, preferably, the service box 3 is centered on the convex shaft provided on both sides, and in the preferred structure of this embodiment, the elevation angle degree range of the service box 3 is set to 125 ° to 180 °, preferably, the elevation angle degree range of the service box 3 is set to 135 ° to 180 °, and the preferred angle therebetween is 135 °, 155 °, 165 °, or 180 °, wherein the pitch angle degree range of the service box 3 is set to 180 ° to 225 °, and the preferred angle therebetween is 180 ° to 210 °, and in the preferred structure of this embodiment, the preferred angle is 180 °, 185 °, 195 °, 205 °, or 210 °; (the range of the angle of inclination toward the ground of the tennis court). Wherein, the CPU also controls the first motor 23 to adjust the pitching angle of the service box body 3 through the controller according to the value set in the memory.

As shown in fig. 8 and 9, in a preferred technical solution of this embodiment, a wheel seat 37 is further disposed at the bottom of the vehicle body 5, the wheel seat 37 is an inverted Y-shaped structure, such as a front fork structure of a bicycle, the bottom of the vehicle body 5 is fixedly connected with the top of the inverted Y-shaped structure, two ends of the bottom of the inverted Y-shaped structure are connected with shafts of the wheels 6, a steering wheel is disposed in the middle of the Y-shaped structure, the wheels 6 freely rotate on the steering wheel in the horizontal direction, a third motor 38 for driving the wheels 6 to rotate is disposed in each wheel 6, the third motor 38 is connected with the CPU through a controller, a connecting rod 8 is disposed on the two wheels 6 on the same side, and teeth are disposed on the connecting; as shown in fig. 10, a fourth motor 42 connected through a connecting bracket 44 is disposed on the vehicle body 5, a second gear 43 is disposed on an output shaft of the fourth motor 42, the second gear 43 is engaged with teeth disposed on the connecting rod 8, wherein the fourth motors 42 are disposed in two opposite directions and connected to a controller, the controller is configured to control the forward rotation or the reverse rotation of the two fourth motors 42, the fourth motors 42 drive the connecting rod 8 to reciprocate through the second gear 43, and the connecting rod 8 is configured to adjust the traveling direction and the steering direction of the vehicle body 5. When the tennis training machine is used, a user sets the tennis training machine at a position which is desired to be set in a tennis court, after whether tennis balls are stored in the tennis ball storage box 1 is determined, the user switches on a power supply, sets the tennis balls to be at an initial position through a touch screen on the control panel 10 and confirms the initial position, sets relevant data such as tennis ball serving quantity, firing speed, firing interval time, tennis ball landing points and the like on the touch screen according to requirements of the user, and automatically sets a pitching angle value and a swinging angle value of the tennis ball serving box body 3 and a pressure value of compressed air in the air storage tank 33 by the CPU according to the set values; a plurality of fixed modes are provided on the touch screen connected with the CPU control panel 10 for the trainee, and the user can set various working modes on the touch screen according to his own needs:

the first mode is as follows: tennis landing place fixed mode, the service box body 3 keeps a fixed state:

firstly, the sleeve 47 is taken down from the ball-serving pipe 11, at this time, the tennis training machine is in a state to be launched, the CPU controls the first electromagnetic valve 36 on the air storage tank 33 to open through the controller according to a program set by a user to charge compressed air into the air storage tank 33, the second electromagnetic valve 31 on the air storage tank 33 is closed at the same time, the collector is used for collecting data signals of air pressure change of the second sensor 32 on the air storage tank 33 in real time and transmitting the collected data signals to the CPU in real time, after the CPU compares the data signals transmitted according to the second sensor 32 with the set data signals, the controller is used for controlling the first electromagnetic valve 36 and the second electromagnetic valve 31 to open or close, when the second electromagnetic valve 31 is opened, a compressed air source is provided for the air cylinder 20, when the compressed air in the air storage tank 33 reaches the set value, the CPU closes the second electromagnetic valve 31 and the first electromagnetic valve 36 through the controller, when the compressed air in the air storage tank 33 does not reach the set value, the CPU closes the second electromagnetic valve 31 through the controller, then opens the first electromagnetic valve 36 to supplement the compressed air for the air storage tank 33, when the pressure value of the compressed air set by the air storage tank 33 is lower, or because the second electromagnetic valve 31 is continuously and frequently opened, the air storage tank 33 cannot rapidly supplement the compressed air through an external air source, the CPU starts the air pump 34 to work through the controller, and supplements the compressed air for the air storage tank 33; at this time, because the tennis training machine is in a state to be launched, the piston 18 is positioned at the rear end of the ball serving tube 11, the bolt 15 is clamped at the top end of the piston 18, the pressure spring 13 is in a compressed state, tennis balls in the ball storage box 1 enter the ball serving box body 3 through the delivery pipe 2 and then fall on the first sensor 17, the first sensor 17 in the embodiment is a pressure sensor, the collector transmits signal data of the weight pressure of the tennis balls on the first sensor 17 to the CPU, the CPU controls the electromagnetic relay 16 to start through the controller according to a set program, the electromagnetic relay 16 pulls the bolt 15 to move downwards through the pull rod, when the bolt 15 can not clamp the piston 18, the pressure spring 13 pushes the piston 18 to move forward, the front end of the piston 18 is provided with a ball feeder in a goblet shape, and the ball feeder on the piston 18 pushes tennis balls to enter the cylinder 20 and be clamped on the clamp spring 24 to enter a to-be-launched state;

when the collector transmits the signal data that the first sensor 17 is not subjected to the weight pressure of the tennis ball to the CPU, the CPU controls the second electromagnetic valve 31 to open through the controller according to a set program, compressed air instantly enters the cylinder 20 through the air pipe and the cylinder joint 12, and the tennis ball is ejected from the ball-launching pipe 11 by high-pressure airflow formed by high-pressure air in the cylinder 20; meanwhile, the piston 18 moves backwards after being pressed, when the front end of the piston 18 passes over the bolt 15, the bolt 15 bounces, the pressure spring 13 offsets the external force applied to the piston 18 to push the piston 18 to move forwards, and the piston 18 is clamped on the bolt 15 and enters a to-be-launched state again; because the side wall of the top of the piston 18 is provided with the two sealing rings 19, and the side wall of the bottom of the piston 18 is provided with the one sealing ring 19, the sealing rings 19 can not only increase the sealing performance between the piston 18 and the service pipe 11 and increase the initial speed of tennis, but also reduce the reciprocating speed of the piston 18 in the service pipe 11 and reduce the damage to parts and the vibration when the tennis is shot, and the proper vibration can also play a role in helping tennis in the tennis storage box 1 to smoothly enter the conveying pipe 2.

And a second mode: moving the tennis ball on the landing point back and forth in sequence:

the sleeve 47 is taken down from the ball serving pipe 11, the CPU controls the pressure value of the air storage tank 33 through the controller according to a set program, so that tennis balls fall on the front point, the middle point and the rear point of a court, the collector collects the pressure value of the second sensor 32 arranged on the air storage tank 33 in real time, the pressure value signal of the air storage tank 33 is transmitted to the CPU, the CPU controls the opening or closing of the first electromagnetic valve 36 through the controller, when the compressed air in the air storage tank 33 reaches a set value, the CPU controls the closing of the first electromagnetic valve 36 through the controller, when the compressed air in the air storage tank 33 is lower than the set value, the CPU controls the opening of the first electromagnetic valve 36 through the controller, the set value of the compressed air in the air storage tank 33 changes at any moment, when the set value of the compressed air in the air storage tank 33 is higher, the tennis balls fall on the rear point of the court, and when the value of the compressed air in the, when the compressed air in the air storage tank 33 is low in value, the tennis ball falls on the ball falling point in front of the court, and the ball speed of the tennis ball changes rapidly in the mode. When the pressure value of the air storage tank 33 is kept unchanged, the CPU controls the first motor 23 to rotate forwards or reversely through the controller, so as to be used for raising or lowering the pitching angle of the service box body 3 and also play a role in controlling the tennis landing point to move forwards and backwards in sequence.

And a third mode: the tennis floor point is moved in a left-right mode in sequence:

the sleeve 47 is taken down from the ball serving tube 11, the CPU controls the second motor 29 to drive the first gear 30 to rotate forwards or reversely in the tooth groove 26 through the controller according to a set program, and when the controller controls the second motor 29 to drive the first gear 30 to rotate forwards, the bottom plate 4 and the ball serving box body 3 rotate leftwards together; when the controller controls the second motor 29 to drive the first gear 30 to rotate reversely, the bottom plate 4 and the service box body 3 rotate rightwards together, and the left-right rotating angles of the bottom plate 4 and the service box body 3 are automatically calculated and set by the CPU according to the ball speed and the drop point set by the tennis balls.

And a fourth mode: the tennis landing point left-right random moving mode:

the CPU controls the second motor 29 to drive the first gear 30 to randomly rotate in the tooth space 26 in the forward direction or the reverse direction through the controller according to a set program, and the controller controls the second electromagnetic valve to serve balls at intervals according to a set time, so that the left and right falling points of tennis balls in the tennis court are irregular.

And a fifth mode: tennis ball landing point irregular random moving mode:

the CPU controls the first motor 23 and the second motor 29 to rotate randomly through the controller according to a set program, and simultaneously launches tennis balls according to a set time interval, so that the landing points of the tennis balls in the tennis court are irregular.

Mode six: the car body 5 does left and right movement to make the tennis ball landing point move irregularly:

the CPU controls the first motor 23 and the second motor 29 to randomly rotate through the controller according to a set program, controls the third motor 38 to simultaneously rotate forwards or reversely through the controller according to the set program, enables the vehicle body 5 to move left and right in the tennis court, simultaneously launches tennis balls according to a set time interval, enables the tennis balls to have irregular ball falling points in the tennis court, and adjusts the tennis ball falling points by calculating the current moving positions according to the originally set program and the initial positions to enable the tennis ball falling points to be in the tennis court.

Mode seven: the vehicle body 5 is in an irregular random moving mode at a tennis ball landing point in the whole tennis field:

the CPU controls the first motor 23 and the second motor 29 to randomly rotate through the controller according to a set program, the CPU controls the third motor 38 to simultaneously rotate in a forward direction or a reverse direction through the controller according to the set program, so that the vehicle body 5 moves left and right in a tennis court, the CPU controls the fourth motor 42 to simultaneously rotate in the forward direction or the reverse direction through the controller according to the set program, as the second gear 43 fixedly connected with the output shaft of the fourth motor 42 is meshed with the teeth on the connecting rod 8, the fourth motor 42 is fixedly connected with the bottom of the vehicle body 5, the fourth motor 42 rotates in the forward direction or the reverse direction, the second gear 43 pushes and pulls the wheel 6 through the connecting rod 8, so that the vehicle body 5 turns during reciprocating motion, so that the vehicle body 5 randomly moves in the tennis court, and the CPU controls to launch tennis balls according to a set time interval, the landing points of the tennis balls in the tennis court are random, and the CPU can calculate the current moving position, the tennis ball drop point is adjusted to be in the court, the memory is further provided with a memory function module, the memory provides original position data for the CPU, and the CPU controls the motion track of the vehicle body 5 through calculation, so that the tennis ball drop point can be always controlled even if the vehicle body 5 moves.

Example 2

The tennis training machine provided by the embodiment is an improvement on the basis of the embodiment 1, and the other structures are the same as the embodiment 1, except that: as shown in fig. 11 and 12, the serving box 3 of this embodiment is provided with a laser receiver 39 connected to a collector, the ports of the laser receiver 39 and the serving tube 11 face a ball net 41, net posts are provided on both sides of the ball net 41, laser transmitters 40 are provided on the bottom and top of the net posts, the laser receiver 39 and the collector perform data transmission, the laser receiver 39 is used to collect signals of the position of the laser transmitter 40 and transmit the signal data to the CPU, the CPU calculates the position of the laser receiver and the position of the other half of the tennis court after comparing the data set in the memory with the position signal data of the laser transmitter 40, and adjusts the serving angle and the falling range of the serving box 3 according to the data mode set by the user to control the serving point of the serving box 3.

The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present invention.

Claims

1. A tennis training machine comprises a ball supply device, a ball serving device, a power device and a control device, wherein the control device controls the power device to provide continuous power for the ball serving device, the ball supply device supplies tennis balls for the ball serving device, and the tennis training machine is characterized in that,

the ball supply device comprises a funnel-shaped ball storage box (1), and the ball storage box (1) is fixedly connected with the ball serving device through a conveying pipe (2);

the service device comprises a service box body (3), the top surface of the service box body (3) is respectively provided with an air cylinder joint (12) and a conveying pipe (2), the conveying pipe (2) is fixedly connected with the bottom of the ball storage box (1), a ball serving pipe (11) with a transverse cylindrical structure is arranged in the ball serving box body (3), the ball shooting part, the cylinder (20), the ball falling part and the ball ejecting part are sequentially arranged in the ball ejecting pipe (11), one end of the service pipe (11) extends out of one side of the service box body (3), the other end of the service tube (11) is a blind end and is fixedly connected on the side wall of the service box body (3), a spring feeding part in the blind end is provided with a pressure spring (13), the pressure spring (13) is provided with a piston (18), the piston (18) moves back and forth between the ball falling part and the elastic feeding part, and a sealing ring (19) is sleeved on the piston (18);

a ball falling part in the ball serving pipe (11) is connected with a conveying pipe (2) for conveying tennis balls, and an air inlet pipe arranged in the downstream direction of the conveying pipe (2) is connected with an air cylinder joint (12);

a first sensor (17) connected with the control device is arranged on the lower side of the ball falling part;

a first through hole (14) is formed in the side wall below the ejection part, a bolt (15) which moves up and down back and forth is arranged in the first through hole (14), the bolt (15) is fixedly connected with an electromagnetic relay (16) arranged in the service box body (3), and the electromagnetic relay (16) attracts the bolt (15) to enable the bolt (15) to move up and down back and forth;

a clamping spring (24) used for limiting the tennis ball to be ejected is arranged on the side wall of the cylinder (20), the clamping spring (24) is of an arc-shaped surface structure protruding outwards, and when compressed air ejects the tennis ball, the clamping spring (24) is pressed by the tennis ball to deform and cling to the inner wall of the cylinder (20);

a fifth motor (45) is arranged on the part, extending out of the serving box body (3), of the serving tube (11), a third gear (46) is arranged on an output shaft of the fifth motor (45), a sleeve (47) is arranged at a port of the serving tube (11), a spring piece (48) is arranged on the inner wall of the sleeve (47), the number of the spring pieces (48) is 3, the spring pieces are arranged in a front-back sequence and used for changing the rotating direction of the shot tennis ball, a gear ring is arranged on the outer side of the sleeve (47) and meshed with the third gear (46) and used for controlling the rotation of the serving tube (11);

marked lines (52) are arranged on the ball serving tube (11) and the sleeve (47), and when the sleeve (47) rotates, the two marked lines (52) adjust the rotating angle of the tennis ball through a controller;

the power device comprises an air storage tank (33) and an air pump (34) which are arranged in a vehicle body (5) and connected with each other through an air pipe, wherein a first electromagnetic valve (36), a second electromagnetic valve (31) and a second sensor (32) are arranged on the air storage tank (33), the second electromagnetic valve (31) is connected with the cylinder joint (12) through the air pipe, and the first electromagnetic valve (36) is connected with an external air source;

the power device also comprises an external power supply and a storage battery (35) arranged on one side of the air pump (34);

the control device comprises a control panel (10) connected with a single chip microcomputer, a CPU arranged in the single chip microcomputer is respectively connected with a memory, a collector and a controller, and the collector is respectively connected with a first sensor (17) and a second sensor (32); the controller is respectively connected with the first electromagnetic valve (36), the second electromagnetic valve (31), the electromagnetic relay (16) and the battery jar (35).

2. The tennis training machine according to claim 1, wherein a bottom plate (4) is arranged between the service box body (3) and the vehicle body (5), a positioning groove (25) with an upward opening and a toothed groove (26) with a sector structure are formed in the bottom plate (4), the toothed groove (26) is meshed with a first gear (30) on a second motor (29), the second motor (29) is fixedly connected to the vehicle body (5), the second motor (29) is connected with a controller and is controlled by the controller to rotate, a positioning shaft (28) is inserted into the positioning groove (25), the positioning groove (25) is movably connected with the positioning shaft (28) on the vehicle body (5), and the positioning shaft (28) is arranged in the middle position of the upper portion of the vehicle body (5).

3. The tennis training machine according to claim 2, wherein a base is provided in the service box (3) below the service tube (11), the base is fixed on a cross bar on the inner side wall of the service box (3), the base is of a U-shaped structure, the bottom of the U-shaped structure is fixed on the cross bar, the opening of the U-shaped structure is downward, a through hole is provided in the middle of the U-shaped structure, a rotating shaft is fixedly connected to the outer side of the first motor (23), the rotating shaft passes through the through hole and is in clearance fit with the through hole, the output shaft of the first motor (23) extends out from the bottom of the service box (3), the output shaft of the first motor (23) is sleeved in a support rod (22) provided on the base (21), the output shaft of the first motor (23) is provided with external threads, the base plate (4) is fixed with the base (21), the support rod (22) provided on the base (21) is of a cylindrical structure, internal threads are arranged in the cylindrical structure, and external threads of an output shaft of the first motor (23) are in threaded connection with the internal threads of the cylindrical structure.

4. The tennis training machine of claim 1, wherein the bottom of the vehicle body (5) is provided with wheels (6) for moving the vehicle body, a third motor (38) is arranged at the center position in each wheel (6), the third motor (38) drives the wheels (6) to move, and the third motor (38) is connected with the controller.

5. The tennis training machine of claim 4, wherein a connecting rod (8) is arranged between the two wheels (6) on the same side, teeth are arranged on the connecting rod (8), the teeth are engaged with a second gear (43), the second gear (43) is fixedly connected with a fourth motor (42), and the fourth motor (42) is fixedly connected with the vehicle body (5) through a connecting bracket (44).

6. Tennis training machine according to claim 1, characterized in that the upper part of the serving box (3) is provided with a laser receiver (39) connected with a controller, the laser receiver (39) and the serving pipe (11) are both ported towards a net (41), both sides of the net (41) are provided with net posts, and both the bottom and the top of the net posts are provided with laser transmitters (40).

7. Tennis training machine according to claim 1, characterized in that the elevation angle degree of the serving cartridge (3) is set between 135 ° and 180 ° and the depression angle degree of the serving cartridge (3) is set between 180 ° and 225 °.

8. Tennis training machine according to claim 2, wherein the base plate (4) is pivotable to the left and right about a positioning axis (28), the pivoting angle of the base plate (4) being in the range of 0 ° -25 °.