CN112774165B

CN112774165B - Free angle service device for badminton training

Info

Publication number: CN112774165B
Application number: CN202110082833.7A
Authority: CN
Inventors: 邹循豪
Original assignee: Hunan First Normal University
Current assignee: Hunan First Normal University
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-01-28
Anticipated expiration: 2041-01-21
Also published as: CN112774165A

Abstract

The invention discloses a free angle service device for badminton training, belonging to the field of badminton training, and comprising an electric guide rail, wherein an arm main body is arranged on the electric guide rail, a service device is arranged on the movable end of the arm main body, one end of the service device, which is far away from the arm main body, is fixedly connected with a launching channel, a launching cavity is formed in the launching channel, an inflation pipe is fixedly connected with the telescopic end of an electric push rod, a plurality of air inlet holes are formed in the other end of a hollow tube main body, an air inlet cavity matched with the air inlet holes is formed in the launching channel, an air tank is fixedly connected with the outer wall of the service device, an air guide pipe is connected between the air tank and the air inlet cavity, a permanent magnet ring is fixedly connected with the outer wall of the top end of the hollow tube main body, the service of a badminton at any angle with a designated force can be realized, and the device can continuously service the badminton, has higher stability, and can carry out batting training at different angles on athletes.

Description

Free angle service device for badminton training

Technical Field

The invention relates to the field of badminton training, in particular to a free-angle serving device for badminton training.

Background

In the badminton, players of both sides need to swing and hit the falling shuttlecocks in the own area continuously until the shuttlecocks fall into the effective area of the other side to score. According to scientific observation, shuttlecocks hit by athletes are generally divided into a vertical falling mode and an angle falling mode. However, in the present teaching, a coach can only explain how to hit badmintons of different falls for students by rotating badmintons in hands, and then use techniques such as high-distance shuttlecocks, hanging shuttlecocks, killing shuttlecocks and the like to enable the students to practice the hitting of the badmintons in sports. But for beginners, without a static ball direction exercise, it is difficult to control the racket to receive the ball. Because the falling speed of the badminton in motion is high, a beginner cannot easily catch the falling mode of the badminton, and the swing posture is not skillful, if the user forcibly strikes the badminton, the problems of idle striking, unreasonable striking part, deformation of the striking posture and the like are easily caused. Therefore, the training efficiency of the general trainees is low, and the trainees cannot easily train the ball feeling.

In order to facilitate badminton hitting training, some badminton training devices appear in the field, wherein the most common badminton pitching machine is a badminton pitching machine, a certain number of badmintons are stored in the pitching machine, the badmintons are shot out through an internal mechanical structure, and the falling direction of the reached badmintons is changed by adjusting the shooting angle. Adopt badminton service robot can improve training efficiency, and present badminton service robot is installed subaerial mostly, and the angle and the altitude mixture control scope of its service are limited, difficult different training demands of adaptation.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a free angle serving device for badminton training, which can be used for serving badminton at any angle with specified force by mounting a specific serving device on a mechanical arm, can be used for serving continuously, has higher stability, is easy to adapt to different training requirements, and can be used for carrying out batting training on athletes at different angles.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A free angle serving device for badminton training comprises an electric guide rail, wherein a mechanical arm main body is installed on the electric guide rail, a serving device is installed at the movable end of the mechanical arm main body, a servo motor is connected between the serving device and the mechanical arm main body, one end, far away from the mechanical arm main body, of the serving device is fixedly connected with a launching channel, a launching cavity is formed in the launching channel in a chiseled mode, one end of the launching channel is fixedly connected with a first electric push rod, an expansion end of the first electric push rod is fixedly connected with an inflation tube, the inflation tube comprises a hollow tube main body, one end, far away from the first electric push rod, of the hollow tube main body is fixedly connected with a high-pressure nozzle, the other end of the hollow tube main body is provided with a plurality of air inlet holes, an air inlet cavity matched with the air inlet holes is formed in the launching channel, and an air tank is fixedly connected to the outer wall of the serving device, the utility model discloses a badminton pitching machine, including air tank and air inlet cavity, air tank, hollow tube main part, service device, installation ring, sliding connection, last ball clamping claw, be connected with second electric putter between service device's the inner wall and the electric slide rail main part, be connected with the air duct between air tank and the air inlet cavity, fixedly connected with permanent magnetism ring on the top outer wall of hollow tube main part, the one end fixedly connected with collar that the transmission was said is kept away from to the service device, the chisel have with collar assorted in the service device, it communicates with each other with the transmission cavity to go up the ball cavity, the joint has the ball storage tube on the collar, install the orbit of going up in the collar, it includes electronic slide rail main part to go up the orbit, sliding connection has last ball clamping claw in the electronic slide rail main part, be connected with second electric putter between service device's inner wall and the electronic slide rail main part, can realize that the badminton is served with appointed dynamics at arbitrary angle, but device service in succession, has higher stability, easily adapts to different training demands, can carry out different angle batting training to the sportsman.

Further, the ball storage tube comprises a ball barrel, one end of the ball barrel, which is close to the ball serving device, is fixedly connected with a limiting ring, the limiting ring is fixedly connected with a snap ring matched with the mounting ring, the other end of the ball barrel is fixedly connected with a sealing cover, a net box is fixedly connected in the sealing cover, a drying agent is stored in the net box, the inner wall of the ball barrel is connected with a sliding ring in a sliding mode, and a compression spring is connected between the sliding ring and the sealing cover. A plurality of shuttlecocks stored in the shuttlecock storage tube are extruded by the slip ring, so that one shuttlecock is always exposed at the position of the limit ring

Further, the gas pitcher includes the seal pot, install the air pump in the seal pot, the end and the air duct fixed connection of giving vent to anger of air pump, the gas of storing in the seal pot is compressed air.

Furthermore, a badminton main body is stored in the badminton storage tube, and a metal film matched with the permanent magnet ring is fixedly connected to a ball support part of the badminton main body.

Further, a free angle device of serving for badminton training, includes a control system, control system is including installing the controller in the device of serving, fixedly connected with pressure sensor on the inner wall of clamping jaw, install baroceptor in the hollow tube main part, pressure sensor, baroceptor, first electric putter, gas pitcher, last ball clamping jaw, go up ball track and arm main part all with controller signal connection.

Furthermore, the ball barrel is made of transparent PVC materials, the outer wall of the limiting ring is polished for storage, and a sealing snap ring is connected between the sealing cover and the ball barrel.

Furthermore, the inner wall of the launching cavity of the launching channel is polished smoothly, and a connecting port of the launching cavity and the upper ball cavity is located at one third of the launching cavity, so that the launching channel has enough space to accelerate after the badminton is impacted.

Furthermore, the length of a connecting port of the launching cavity and the upper ball cavity is smaller than the maximum movable length of the telescopic end of the first electric push rod, so that the first electric push rod can push the shuttlecocks to be staggered with the upper ball cavity.

Furthermore, the ball serving device and the launching channel are integrally forged by light alloys such as titanium alloy, magnesium alloy or aluminum alloy.

Further, it includes the slider to go up the ball gripper, it is connected with the rotation platform to rotate on the slider, install in the slider and rotate platform assorted step motor, it has a pair of clamping jaw to rotate bench sliding connection, rotate the interior fixedly connected with biax motor of platform, equal fixedly connected with threaded rod on two power take off of biax motor, clamping jaw and threaded rod threaded connection pull out the badminton from storing up the ball pipe through last ball clamping jaw to through last ball gripper drive badminton rotatory make the badminton with axis and firing channel axis horizontal state get into the firing channel, can not take place the skew when guaranteeing that the badminton gets into in the firing channel.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme can realize that the badminton is sent out with appointed dynamics at arbitrary angle through, but the device is sent out in succession, has higher stability, easily adapts to different training demands, can carry out different angle batting training to the sportsman.

(2) The ball storage tube comprises a ball barrel, wherein the ball barrel is close to one end of the ball serving device and is fixedly connected with a limiting ring, the limiting ring is fixedly connected with a snap ring matched with a mounting ring, the other end of the ball barrel is fixedly connected with a sealing cover, a net box is fixedly connected in the sealing cover, a drying agent is stored in the net box, a sliding ring is connected to the inner wall of the ball barrel in a sliding mode, and a compression spring is connected between the sliding ring and the sealing cover. A plurality of shuttlecocks stored in the shuttlecock storage tube are extruded by the sliding ring, and one shuttlecock is always exposed at the position of the limiting ring.

(3) Go up ball clamping jaw and include the slider, it rotates to be connected with the rotation platform on the slider, install in the slider and rotate platform assorted step motor, it has a pair of clamping jaw to rotate bench sliding connection, rotate the interior fixedly connected with biax motor of platform, equal fixedly connected with threaded rod on two power take off of biax motor, clamping jaw and threaded rod threaded connection, pull out the badminton from storing up the ball pipe through last ball clamping jaw, and through last ball clamping jaw drive badminton rotatory messenger badminton with axis and firing way axis horizontal state get into the firing way, can not take place the skew when guaranteeing that the badminton gets into in the firing way.

(4) The utility model provides a free angle device of serving for badminton training, includes a control system, and control system is including installing the controller in the device of serving, fixedly connected with pressure sensor on the inner wall of clamping jaw, installs baroceptor in the hollow tube main part, and pressure sensor, baroceptor, first electric putter, gas pitcher, last ball clamping jaw, upward ball track and arm main part all with controller signal connection, the device of serving single control, the convenient going on of serving in succession.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of the upper ball gripper of the present invention;

FIG. 5 is a schematic view of the structure of the shuttlecock of the present invention as it is being fed;

fig. 6 is a schematic structural diagram at B in fig. 5.

The reference numbers in the figures illustrate:

the automatic ball feeding device comprises an electric slideway 1, a mechanical arm main body 2, a ball serving device 3, a 301 mounting ring, a 4 launching channel, a ball storage tube 5, a ball barrel 501, a 502 limiting ring, a sealing cover 503, a 504 net box, a 505 sliding ring, a 506 compression spring, a 6 gas tank, a 601 sealing tank, a 602 gas guide tube, a 7 first electric push rod, an 8 gas filling tube, a 801 hollow tube main body, an 802 high-pressure spray head, a 803 permanent magnetic ring, a 9 ball feeding clamping claw, a 901 sliding block, a 902 rotating table, a 903 clamping claw, a 904 double-shaft motor, a 905 threaded rod, a 10 ball feeding track, a 1001 electric sliding rail main body, a 1002 second electric push rod and a 103 connecting plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection can be direct connection or indirect connection through an intermediate medium, and can be communication inside the model adapting element. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-5, a free angle serving device for badminton training comprises an electric guide rail 1, the electric guide rail 1 can be installed on the ground or the ceiling, a mechanical arm main body 2 is installed on the electric guide rail 1, a serving device 3 is installed on the movable end of the mechanical arm main body 2, a servo motor is connected between the serving device 3 and the mechanical arm main body 2, one end of the serving device 3 far away from the mechanical arm main body 2 is fixedly connected with a launching channel 4, a launching cavity is chiseled in the launching channel 4, one end of the launching channel 4 is fixedly connected with a first electric push rod 7, an inflation tube 8 is fixedly connected to the telescopic end of the first electric push rod 7, the inner wall of the launching cavity of the launching channel 4 is polished smooth, and the connecting port of the launching cavity and the upper ball cavity is positioned at one third of the launching cavity, so that the launching channel 4 has enough space for acceleration after the badminton is impacted. The length of a connecting port of the launching cavity and the upper ball cavity is smaller than the maximum movable length of the telescopic end of the first electric push rod 7, and the first electric push rod 7 can push the shuttlecocks to be staggered with the upper ball cavity. The ball serving device 3 and the launching channel 4 are integrally forged by light alloys such as titanium alloy, magnesium alloy or aluminum alloy.

Referring to fig. 3-6, the inflation tube 8 includes a hollow tube body 801, one end of the hollow tube body 801 far away from the first electric push rod 7 is fixedly connected with a high pressure nozzle 802, the other end of the hollow tube body 801 is perforated with a plurality of air inlets, an air inlet cavity matched with the air inlets is perforated in the launching channel 4, an air tank 6 is fixedly connected to the outer wall of the ball service device 3, a sealing tank 601 is connected between the air tank 6 and the air inlet cavity, a permanent magnet ring 803 is fixedly connected to the outer wall of the top end of the hollow tube body 801, one end of the ball service device 3 far away from the launching channel 4 is fixedly connected with a mounting ring 301, an upper ball cavity matched with the mounting ring 301 is perforated in the ball service device 3, the upper ball cavity is communicated with the launching cavity, a ball storage tube 5 is clamped on the mounting ring 301, an upper ball rail 10 is installed in the mounting ring 301, the upper ball rail 10 includes an electric slide rail body 1001, an upper ball clamp 9 is slidably connected to the electric slide rail body 1001, a second electric push rod 1002 is connected between the inner wall of the serving device 3 and the electric slide rail body 1001, a connecting plate is connected between the telescopic end of the second electric push rod 1002 and the electric slide rail body 1001, and the electric slide rail body 1001 is slidably connected to the inner wall of the mounting ring 301.

Referring to fig. 2, the ball storage tube 5 includes a ball barrel 501, a limit ring 502 is fixedly connected to one end of the ball barrel 501 close to the ball dispenser 3, a snap ring matched with the mounting ring 301 is fixedly connected to the limit ring 502, a sealing cover 503 is fixedly connected to the other end of the ball barrel 501, a net box 504 is fixedly connected to the inside of the sealing cover 503, a drying agent is stored in the net box 504, a slip ring 505 is slidably connected to the inner wall of the ball barrel 501, a compression spring 506 is connected between the slip ring 505 and the sealing cover 503, the ball barrel 501 is made of a transparent PVC material, the outer wall of the limit ring 502 is polished and stored, and a sealing snap ring is connected between the sealing cover 503 and the ball barrel 501. The shuttlecock main body is stored in the shuttlecock storage tube 5, and a metal film matched with the permanent magnet ring 803 is fixedly connected to the ball support part of the shuttlecock main body. A plurality of shuttlecocks stored in the shuttlecock storage tube 5 are extruded by the slip ring 505, and one shuttlecock is always exposed at the position of the limit ring 502.

Referring to fig. 2-3, the gas tank 6 includes a sealed tank 601, a gas pump is installed in the sealed tank 601, a gas outlet end of the gas pump is fixedly connected to a gas guiding tube 602, an electromagnetic valve is installed on the gas guiding tube 602, and the gas stored in the sealed tank 601 is compressed air.

The utility model provides a free angle device of serving for badminton training, includes a control system, and control system is including installing the controller in the device of serving 3, fixedly connected with pressure sensor on the inner wall of clamping jaw 903, installs baroceptor in the hollow tube main part 801, and pressure sensor, baroceptor, first electric putter 7, gas pitcher 6, go up ball clamping jaw 9, go up ball track 10 and arm main part 2 all with controller signal connection.

Referring to fig. 2-4, the shuttlecock feeding clamping claw 9 includes a slider 901, a rotating table 902 is rotatably connected to the slider 901, a stepping motor matched with the rotating table 902 is installed in the slider 901, a rotating shaft is installed on the rotating table 902, a transmission belt is connected between a power output end of the stepping motor and the rotating shaft of the rotating table 902, a pair of clamping jaws 903 are slidably connected to the rotating table 902, a double-shaft motor 904 is fixedly connected to the rotating table 902, threaded rods 905 are fixedly connected to two power output ends of the double-shaft motor 904, the clamping jaws 903 are in threaded connection with the threaded rods 905, the shuttlecocks are pulled out from the shuttlecock storage tube 5 through the shuttlecock feeding clamping jaws 9, and the shuttlecocks are driven to rotate by the shuttlecock feeding claw 9 so that the shuttlecocks enter the launching channel 4 in a state that the axes of the shuttlecocks and the launching channel 4 are horizontal, thereby ensuring that the shuttlecocks cannot deviate when entering the launching channel 4.

When the scheme is used, a technician firstly adjusts the position of the service device 3 by controlling the electric slide way 1, then adjusts the angle and the space position of the ball outlet end of the service tube 4 of the service device 3 by controlling the mechanical arm main body 2, after the position adjustment of the service tube 4 is finished, the pair of clamping jaws 903 are used for clamping the badminton ball support part exposed out of the badminton storage cylinder 5 and the limiting ring 502 by controlling the upper ball clamping jaw 9, then the badminton is pulled out of the badminton storage cylinder 5 by the upper ball clamping jaw 9, after the upper ball clamping jaw 9 runs to the other end of the 10, the cloth feeding motor in the upper ball clamping jaw 9 works, the rotating table 902 rotates by 90 ℃ to enable the clamping jaw 903 to drive the clamped badminton to rotate, at the moment, the axis of the badminton is horizontal to the axis of the service tube 4, then the second electric push rod 1002 works to enable the second electric push rod 1002 to drive the electric slide rail main body 1001 to integrally move together with the service tube 4 until the badminton enters the service tube 4, at the moment, the first electric push rod 7 works, so that the first electric push rod 7 drives the inflation tube 8 to move, the end face of the inflation tube 8 is attached to the end face of the ball support of the badminton, the permanent magnet ring 803 on the inflation tube 8 is attracted to the metal film on the end face of the ball support of the badminton, the badminton is fixed in the service tube 4, then the badminton is released by the pair of clamping jaws 903, and the upper ball clamping jaw 9 resets;

after the upper ball clamping claw 9 is reset, the first electric push rod 7 continues to push the air charging pipe 8 to enable the shuttlecock to be clamped with the upper ball cavity in a wrong way, then the air pump in the air charging pipe 6 works to enable the high-pressure air to be injected into the air charging pipe 8, the high-pressure air is ejected out through 802, the shuttlecock is impacted by the high-pressure air and is shot out from the service pipe 4, and the shuttlecock is shot out at a specified angle;

the shuttlecock can be continuously input into the shuttlecock feeding pipe 4 by repeating the motion of the shuttlecock feeding clamping claw 9, so that the shuttlecock can be continuously shot out by the inflating pipe 8, after the shuttlecock in the shuttlecock storage cylinder 5 is gradually reduced, the pressure of the compression spring 506 on the shuttlecock is insufficient to enable the shuttlecock support to be exposed out of the limiting ring 502, the shuttlecock cannot be clamped by the rotating table 902 when the rotating table 902 is clamped, the pressure sensor on the rotating table 902 cannot detect the pressure, the pressure sensor sends a feedback signal to the controller, the controller drives the mechanical arm main body 2 to work, the mechanical arm main body 2 is adjusted, the shuttlecock feeding device 3 rotates relative to the initial position until the shuttlecock storage cylinder 5 is vertical to the horizontal plane, the shuttlecock in the shuttlecock storage cylinder 5 falls under the action of gravity until the shuttlecock support protrudes out of the limiting ring 502, and the shuttlecock feeding clamping claw 9 can repeat the clamping operation.

This scheme can realize through can realizing that the badminton is in order to appoint the dynamics to serve at arbitrary angle, and the badminton in this device can be when the device is arbitrary angle all can input the chamber of serving, guarantees that the device can serve in succession, has higher stability, easily adapts to different training demands, can carry out different angle batting training to the sportsman.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a free angle device of serving for badminton training, includes electronic guide rail (1), install arm main part (2), its characterized in that on electronic guide rail (1): the mechanical arm is characterized in that a ball serving device (3) is mounted at the movable end of the mechanical arm main body (2), a servo motor is connected between the ball serving device (3) and the mechanical arm main body (2), a launching channel (4) is fixedly connected at one end, far away from the mechanical arm main body (2), of the ball serving device (3), a launching cavity is formed in the launching channel (4), a first electric push rod (7) is fixedly connected at one end of the launching channel (4), an inflation tube (8) is fixedly connected at the telescopic end of the first electric push rod (7), the inflation tube (8) comprises a hollow tube main body (801), a high-pressure spray nozzle (802) is fixedly connected at one end, far away from the first electric push rod (7), of the hollow tube main body (801), a plurality of air inlet holes are formed in the other end of the hollow tube main body (801), and an air inlet cavity matched with the air inlet holes is formed in the launching channel (4), an air tank (6) is fixedly connected on the outer wall of the ball serving device (3), an air guide pipe (602) is connected between the air tank (6) and the air inlet cavity, the outer wall of the top end of the hollow tube main body (801) is fixedly connected with a permanent magnet ring (803), one end of the ball serving device (3) far away from the launching channel (4) is fixedly connected with a mounting ring (301), an upper ball cavity matched with the mounting ring (301) is drilled in the ball serving device (3), the upper ball cavity is communicated with the launching cavity, the mounting ring (301) is clamped with a ball storage tube (5), an upper ball track (10) is arranged in the mounting ring (301), the upper ball track (10) comprises an electric slide rail main body (1001), the electric slide rail main body (1001) is connected with an upper ball clamping claw (9) in a sliding way, a second electric push rod (1002) is connected between the inner wall of the serving device (3) and the electric slide rail main body (1001); the ball storage tube (5) comprises a ball barrel (501), one end, close to the ball serving device (3), of the ball barrel (501) is fixedly connected with a limiting ring (502), a clamping ring matched with the mounting ring (301) is fixedly connected to the limiting ring (502), the other end of the ball barrel (501) is fixedly connected with a sealing cover (503), a net box (504) is fixedly connected to the inside of the sealing cover (503), a drying agent is stored in the net box (504), a sliding ring (505) is connected to the inner wall of the ball barrel (501) in a sliding mode, and a compression spring (506) is connected between the sliding ring (505) and the sealing cover (503); the air tank (6) comprises a sealing tank (601), an air pump is installed in the sealing tank (601), an air outlet end of the air pump is fixedly connected with the air guide pipe (602), and air stored in the sealing tank (601) is compressed air; a badminton main body is stored in the badminton storage tube (5), and a ball support part of the badminton main body is fixedly connected with a metal film matched with the permanent magnet ring (803); the control system comprises a controller arranged in a ball serving device (3), a pressure sensor is fixedly connected to the inner wall of a clamping jaw (903), an air pressure sensor is arranged in a hollow tube main body (801), and the pressure sensor, the air pressure sensor, a first electric push rod (7), an air tank (6), a ball feeding clamping jaw (9), a ball feeding track (10) and a mechanical arm main body (2) are in signal connection with the controller; go up ball clamping jaw (9) and include slider (901), it has rotation platform (902) to rotate on slider (901), install in slider (901) and rotate platform (902) assorted step motor, sliding connection has a pair of clamping jaw (903) on rotation platform (902), fixedly connected with biax motor (904) in rotation platform (902), equal fixedly connected with threaded rod (905) on two power take off of biax motor (904), clamping jaw (903) and threaded rod (905) threaded connection.

2. The free angle serving device for badminton training according to claim 1, wherein: the ball barrel (501) is made of transparent PVC materials, the outer wall of the limiting ring (502) is polished for storage, and a sealing snap ring is connected between the sealing cover (503) and the ball barrel (501).

3. The free angle serving device for badminton training according to claim 1, wherein: the inner wall of the emission cavity of the emission channel (4) is polished smoothly, and a connecting port of the emission cavity and the upper ball cavity is positioned at one third of the emission cavity.

4. The free angle serving device for badminton training according to claim 1, wherein: the length of a connecting port of the launching cavity and the upper ball cavity is smaller than the maximum movable length of the telescopic end of the first electric push rod (7).

5. The free angle serving device for badminton training according to claim 1, wherein: the ball serving device (3) and the launching channel (4) are integrally forged by light alloys such as titanium alloy, magnesium alloy or aluminum alloy.