CN114681887B - tennis ball machine - Google Patents

Abstract

The invention discloses a tennis ball pitching machine, which belongs to the technical field of tennis training equipment structures and comprises a ball hopper, a ball feeding pipe, a launching pipe, a pitching angle adjusting device and a protective cover, and is characterized in that a hopper cover with a lock catch is arranged above the ball hopper; the ball hopper is communicated with the launching tube through a ball feeding tube; the double-end pipe of the launching pipe is respectively provided with a flat ball launching pipe and a rotary ball launching pipe; a rotary ball adjusting device is arranged on the rotary ball launching tube; a pitch angle adjusting device is arranged outside the shell and is arranged inside the protective cover; a horizontal angle adjusting device, a height adjusting device and a walking supporting base are sequentially arranged below the protective cover. Compared with the prior art, the tennis ball serving machine can simulate various tennis ball serving modes and different types of rotary balls, solves the problem that the existing tennis ball serving machine cannot simulate tennis ball serving to assist a player in receiving and serving, and meets the requirements of various serving balls for tennis training.

Description

tennis ball machine

technical field

The invention relates to the technical field of tennis training equipment structure, in particular to a tennis ball machine.

Background technique

There are basically three types of tennis serve: flat serve, slice serve and topspin serve. The flat serve is the fastest serving method among all kinds of serving, also known as the cannonball serving. This serve not only has a fast ball speed, but also has a low rebound. Especially tall players can directly attack the opponent by taking advantage of the air superiority of the high-hitting ball; the cutting serve is a kind of serving method that mainly spins to the right (with a little underspin); The serve method supplemented by spin.

In tennis teaching and training in colleges and universities, tennis ball machines are usually used to cooperate with students in tennis training. However, the existing tennis ball machines have the defect of low serve height, which cannot simulate the explosive power of a flat serve. The current common solution is in tennis A bracket is added under the ball serving machine to achieve a high point serve and achieve the purpose of simulating a flat serve. However, when this solution is used in practical applications, the vibration generated by the tennis ball machine will shake the bracket, and the stability and safety are insufficient;

In addition, the current mainstream tennis ball machine mainly uses the principle of counter-rotating double wheels to send topspin and backspin, which has the defect of being unable to send side spin and left and right spin, so it cannot simulate cutting serve and topspin serve to assist players. Problems with return drills.

Contents of the invention

The purpose of the present invention is to provide a tennis ball machine to solve the problem that the existing tennis ball machines cannot simulate tennis balls to assist players in receiving and receiving training.

The tennis ball machine provided by the present invention includes a ball bucket, a ball sending pipe, a launch pipe, an air compressor, a spin adjustment device, a casing, a pitch angle adjustment device, a protective cover, a horizontal angle adjustment device, a height adjustment device and a walking support base, It is characterized in that a bucket cover with a lock is arranged above the ball bucket; the ball bucket communicates with the launch tube through the ball delivery pipe; the ball delivery pipe is provided with a first electric valve;

The launch tube is a herringbone structure, and the nozzle of the single-head tube of the launch tube is connected to the air compressor through a high-pressure nozzle; A limited step is processed on one side, and the pipe on the side away from the air compressor is processed into an hourglass-shaped pipe;

The double-headed tubes of the launch tube are respectively set as a flat ball launch tube and a rotary ball launch tube; the flat ball launch tube is provided with a second electric valve at the connection with the single head tube of the launch tube; the rotary ball launch tube is connected with the launch tube A third electric valve is provided at the joint of the single-head tube, and a spin ball adjusting device is set on the spin ball launching tube;

The spinning ball adjustment device includes a rotating sleeve, a telescopic rebounder, a support plate, a roller, a driving gear, a first transmission shaft and a stepping motor; The ejector is arranged on the outer circle of the rotary sleeve close to the mouth of the spinning ball launch tube; the support plate is rotated on one side of the sleeve opening of the rotary sleeve, the support plate is located on the side of the tube mouth of the spinning ball launching tube, and one side of the support plate is against the At the telescopic head of the telescopic rebounder; the bottom of the support plate is rotated with rollers, the rollers are arc-shaped columns, and the rollers are located on the side of the channel opening of the spinning ball launching tube; the rotating sleeve is far away from the nozzle of the spinning ball launching tube The outer circle of one side is processed with gear teeth, and the outer side of the rotating sleeve is meshed with a driving gear through the gear teeth; the driving gear is arranged at one end of the first transmission shaft, and the end of the first transmission shaft away from the driving gear is mechanically connected with a stepping motor;

The ball bucket, the ball delivery pipe, the launching pipe, the air compressor, the ball-spin adjustment device, the first electric valve, the second electric valve and the third electric valve are all installed inside the shell; the upper end of the ball sticks out of the shell; The shell is provided with a first ball opening at the position corresponding to the mouth of the flat ball launching tube; the shell is provided with a second ball opening at the position corresponding to the mouth of the spinning ball launching tube;

A pitch angle adjustment device is arranged outside the outer shell, and the pitch angle adjustment device is arranged inside the protective cover; a horizontal angle adjustment device, a height adjustment device and a walking support base are sequentially arranged under the protective cover.

Further, it also includes: a control device, which is electrically connected to the first electric valve, the second electric valve, the third electric valve, the stepper motor, the pitch angle adjustment device, the horizontal angle adjustment device, the height adjustment device and the walking support base. connected, can respectively control the first electric valve, the second electric valve, the third electric valve, the stepper motor, the pitch angle adjustment device, the horizontal angle adjustment device, the height adjustment device and the walking support base.

Further, the pitch angle adjustment device includes a second transmission shaft, a third transmission shaft and a double-headed motor; the second transmission shaft is arranged symmetrically on both sides of the casing, and the end of the second transmission shaft away from the casing is rotatably arranged on the protective cover Inside; inside the protective cover, a third transmission shaft is rotated below the second transmission shaft, and a double-head motor is mechanically connected between the third transmission shafts; a chain transmission is arranged between the second transmission shaft and the third transmission shaft; the The control device is electrically connected with the double-head motor.

Further, the horizontal angle adjustment device is an electric rotary table.

Further, the height adjustment device is an electric lifting platform.

Further, the walking support base is a crawler base.

A tennis ball serving machine provided by the present invention is designed with double serving channels, wherein the flat ball launching tube is specially used to simulate sending a flat hitting ball; the spin ball launching tube is specially used to simulate sending a spinning ball by adding a spin ball adjusting device; The spin ball adjustment device adds a roller that can be adjusted for 360° rotation at the nozzle of the spin ball launch tube. When the tennis ball is ejected from the spin ball launch tube, it hits the roller to add rotation in the angular direction of the tennis ball roller. Torque, so that the launched tennis ball changes from a flat ball to a spin ball, thus realizing the function that the tennis ball machine can spin the ball at any angle;

The present invention is also designed with a pitch angle adjustment device, a horizontal angle adjustment device and a height adjustment device. The cooperation of the three devices can realize the adjustment of the pitch angle, horizontal angle and height of the launch tube, and can realize sending and throwing balls in different directions and heights. , It also meets the requirements of high point serve. The invention adopts a crawler-type base, which has excellent pressure bearing capacity and stable buffering capacity, and can move as a whole to realize serving at different positions;

To sum up, the present invention effectively solves the problem that the existing tennis serving machines cannot simulate tennis serving to assist players in receiving and receiving training, and also meets the needs of various serving ball types for tennis training.

Description of drawings

The accompanying drawings disclose specific embodiments of the invention, wherein,

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the left side view of the present invention;

Fig. 4 is the structural schematic diagram of the pitch angle adjusting device drawn from Fig. 1 in the present invention;

Fig. 5 is a schematic diagram of the internal structure of B drawn from Fig. 4 in the present invention;

Fig. 6 is the C partial enlarged view that the present invention is drawn by Fig. 5;

Fig. 7 is a structural schematic diagram of the launch tube of the present invention;

Fig. 8 is a schematic structural view of the roller of the present invention when it is not impacted;

Fig. 9 is a schematic structural view of the roller of the present invention after being hit.

Detailed ways

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

In the description of the present invention, unless otherwise specified, the terms "first", "second", "third", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

The tennis ball machine provided by the present invention includes a ball bucket 1, a ball delivery pipe 2, a launch pipe 3, an air compressor 4, a spin adjustment device 5, a casing 9, a pitch angle adjustment device, a protective cover 11, a horizontal angle adjustment device 14, Height adjustment device 15, walking support base 16 and control device; the top of the ball bucket 1 is provided with a bucket cover with a lock; the ball bucket 1 communicates with the launch tube 3 through the ball delivery tube 2; the ball delivery tube 2 is provided with a first electric valve 6.

The launch tube 3 has a herringbone structure, and the nozzle of the single-head tube of the launch tube 3 is connected to the air compressor 4 through a high-pressure nozzle; The limit step 301 is processed on the side close to the air compressor 4, and the pipeline on the side far away from the air compressor 4 is processed into an hourglass-shaped pipeline. position, to prevent the tennis ball machine from falling off from the launch tube 3 when the angle is adjusted.

The double-headed tubes of the launch tube 3 are respectively set as a flat ball launch tube 31 and a rotary ball launch tube 32; the flat ball launch tube 31 is provided with a second electric valve 7 at the single-head tube connection with the launch tube 3; the rotary ball launch tube 32 is provided with a third electric valve 8 at the single head pipe connection with the launch tube 3, and the spin ball launch tube 32 is provided with a spin ball adjusting device 5;

Spin ball adjustment device 5 comprises swivel sleeve 51, telescopic rebounder 52, support plate 53, roller 54, driving gear 55, first transmission shaft 56 and stepper motor 57; The outer circle of the mouth of the ball launch tube 32; the telescopic rebounder 52 is arranged on the outer circle of the rotating sleeve 51 near the mouth of the ball launching tube 32; Located on the nozzle side of the spinning ball launch tube 32, and one side of the support plate 53 leans against the telescopic head of the telescopic rebounder 52; the bottom of the support plate 53 is rotated to be provided with a roller 54, and the roller 54 is an arc column. And the roller 54 is positioned at the channel mouth side of the spin ball launch tube 32; when the tennis ball is launched from the spin ball launch tube 32 tube mouth, the roller 54 is subject to a violent impact, which drives the support plate 53 to rotate together, and the support plate 53 rotates to compress and stretch Rebounder 52, when support plate 53 is pressed to telescopic rebounder 52 travel end points, roller 54 hits outside the channel away from spinning ball launching tube 32, does not affect the trajectory of tennis; After tennis is launched, support plate 53 Affected by the elastic force of the telescopic rebounder 52, the roller 54 is driven to reset, ready for the next serve.

As shown in Fig. 5 and Fig. 6, the outer circle of the rotating sleeve 51 away from the nozzle side of the spinning ball launching tube 32 is processed with gear teeth, and the outer side of the rotating sleeve 51 is meshed with a driving gear 55 through the gear teeth; the driving gear 55 is arranged on the first transmission One end of the shaft 56, the end of the first transmission shaft 56 far away from the driving gear 55 is mechanically connected with a stepping motor 57; the stepping motor 57 drives the first transmission shaft 56 to rotate, and the first transmission shaft 56 is engaged and driven by the driving gear 55 to drive the rotating sleeve 51 rotates, and the rotating sleeve 51 further drives the roller 54 to carry out 360 ° rotation adjustment. After the tennis ball is launched through the nozzle of the spinning ball launching tube 32, it hits the roller 54 and adds a rotational moment in the angular direction of the tennis roller 54, so that The launched tennis ball is transformed into a spinning ball from a flat hitting ball, thus the invention can realize the spinning ball in any angle direction.

The ball bucket 1, the ball sending pipe 2, the launching pipe 3, the air compressor 4, the ball spinning adjustment device 5, the first electric valve 6, the second electric valve 7 and the third electric valve 8 are all installed inside the shell 9; the ball bucket 1 The upper end stretches out of the shell 9; the shell 9 is provided with a first ball opening 91 at the position of the corresponding flat ball launching tube 31 mouthpiece;

The pitch angle adjusting device includes a second transmission shaft 10, a third transmission shaft 12 and a double-headed motor 13; the second transmission shaft 10 is symmetrically arranged on both sides of the casing 9, and one end of the second transmission shaft 10 away from the casing 9 is rotatably arranged on the Inside the protective cover 11; the inside of the protective cover 11 is provided with a third transmission shaft 12 rotating below the second transmission shaft 10, and a double-head motor 13 is mechanically connected between the third transmission shaft 12; the second transmission shaft 10 and the third transmission shaft A chain drive is arranged between 12; the protective cover 11 plays a protective role on the pitch angle adjustment device.

A horizontal angle adjustment device 14 is connected and fixed below the protective cover 11, and the horizontal angle adjustment device 14 is preferably an electric rotary table;

A height adjustment device 15 is connected and fixed below the horizontal angle adjustment device 14, and the height adjustment device 15 is preferably an electric lifting platform;

A walking support base 16 is connected and fixed below the height adjustment device 15, and the walking support base 16 is preferably a crawler base, which has excellent pressure bearing capacity and stable buffering capacity.

The control device is electrically connected with the first electric valve 6, the second electric valve 7, the third electric valve 8, the stepper motor 57, the double-head motor 13, the horizontal angle adjustment device 14, the height adjustment device 15 and the walking support base 16, By setting the control device, it is possible to control the switches of three electric valves, two motors, the rotation angle of the horizontal angle adjustment device 14 and the height adjustment device 15, and the start and stop movement of the walking support base 16, thereby realizing the sequence of automatic control or random delivery. Different types of serves and random balls with different combinations of spin, speed, power and placement.

Those of ordinary skill in the art can understand that all or part of the process for realizing the control of the above-mentioned control device can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be executed when the program is executed. , may include the flow of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

In a specific embodiment, the tennis ball serving machine of the present invention can realize serving in the following ways:

(1) Serving: The tennis ball put into the ball bucket 1 enters the launch tube 3 through the delivery tube 2; if a flat shot is selected, the first electric valve 6 is controlled to close the communication channel between the delivery tube 2 and the launch tube 3, Control the second electric valve 7 to open the channel 31 of the flat ball launch tube, control the third electric valve 8 to close the spin ball launch tube 32 channel, and finally control the air compressor 4 to spray high-pressure gas to the tennis ball through the high-pressure nozzle, and the tennis ball passes through the flat ball launch tube 31 to send out; if you choose to send out the spinning ball, control the first electric valve 6 to close the communication channel between the ball delivery pipe 2 and the launch pipe 3, control the second electric valve 7 to close the flat ball launch pipe 31 channel, and control the third electric valve 8 to open Spinning ball launching tube 32 passages, control air compressor 4 utilizes high-pressure nozzle injection high-pressure gas to tennis ball, tennis ball is sent through spinning ball launching tube 32, when tennis ball is sent out from spinning ball launching tube 32 mouthpieces, by bumping roller 54, meeting Add the rotational torque in the angular direction of the tennis roller 54, so that the launched tennis ball is changed from a flat ball to a spin ball; wherein, by controlling the output air pressure of the air compressor 4, the power and speed of the ball can be adjusted; When spinning the ball, by controlling the stepper motor 57, the first transmission shaft 56 is driven to rotate, and the driving gear 55 is engaged and driven to drive the rotating sleeve 51 to rotate, and the rotating sleeve 51 further drives the roller 54 to perform 360° rotation adjustment, which can simulate Spin balls with different rotation directions to assist players in receiving and serving training.

(2) Serving pitch angle adjustment: the rotation of the third drive shaft 12 is controlled by the double-headed motor 13, the third drive shaft 12 drives the second drive shaft 10 to rotate through the chain transmission, and the second drive shaft 10 drives the shell 9 and the internal components of the shell 9 Rotate, and then realize the pitch angle adjustment of launch tube 3.

(3) Horizontal angle adjustment of the ball: control the horizontal angle adjustment device 14 to rotate around the vertical axis, and drive the launch tube 3 to achieve 360° rotation adjustment, which can meet the needs of different landing points.

(4) Serve height adjustment: Control the height adjustment device 15 to lift and drive the launch tube 3 to adjust the height, which can realize high-point serve, cooperate with the air compressor 4, simulate a flat serve, and assist players in receiving and receiving training.

(5) Adjustment of the serving position: By controlling the walking support base 16, the overall movement on the court is realized, and the serving at different positions of the court is simulated.

(6) Control the three electric valves, the air pressure of the air compressor 4, the stepper motor 57, the double-head motor 13, the horizontal angle adjustment device 14, the height adjustment device 15 and the walking support base 16 through the preset program in the control device, Random ball types with different combinations of rotation, speed, strength, landing point and serving position can be automatically realized sequentially or randomly.

The tennis ball serving machine of the present invention can not only control the different positions, heights and landing points of the tennis ball, but also simulate various tennis ball serving methods and different types of spin balls, which solves the problem that the existing tennis ball serving machines cannot simulate tennis balls to assist players to perform. The problem of receiving and serving training meets the needs of various serving ball types in tennis training.

Claims (6)

1. A tennis ball serving machine comprises a ball hopper (1), a ball feeding pipe (2), a launching pipe (3), an air compressor (4), a ball rotating adjusting device (5), a shell (9), a pitching angle adjusting device, a protective cover (11), a horizontal angle adjusting device (14), a height adjusting device (15) and a walking support base (16), and is characterized in that a hopper cover with a lock catch is arranged above the ball hopper (1); the ball hopper (1) is communicated with the launching tube (3) through a ball feeding tube (2); a first electric valve (6) is arranged on the ball feeding pipe (2);

the launching tube (3) is of a herringbone structure, and a single-end tube orifice of the launching tube (3) is connected with the air compressor (4) through a high-pressure nozzle via a pipeline; the single-end pipe of the launching pipe (3) takes the position connected with the ball sending pipe (2) as a boundary, a limiting step (301) is processed at one side close to the air compressor (4), and a pipeline at one side far away from the air compressor (4) is processed into an hourglass-shaped pipeline;

the double-end pipe of the launching pipe (3) is respectively provided with a flat ball launching pipe (31) and a rotary ball launching pipe (32); a second electric valve (7) is arranged at the joint of the single-end pipe of the flat ball launching pipe (31) and the launching pipe (3); a third electric valve (8) is arranged at the joint of the spin ball launching tube (32) and the single-head tube of the launching tube (3), and a spin ball adjusting device (5) is arranged on the spin ball launching tube (32);

the rotary ball adjusting device (5) comprises a rotary sleeve (51), a telescopic rebounder (52), a supporting plate (53), a roller (54), a driving gear (55), a first transmission shaft (56) and a stepping motor (57); the rotary sleeve (51) is rotatably arranged at the outer circle of the pipe orifice of the rotary ball launching pipe (32); the retractable bullet device (52) is arranged at the outer circle of the rotating sleeve (51) close to the nozzle of the rotary ball launching tube (32); the supporting plate (53) is rotatably arranged on one side of the sleeve opening of the rotating sleeve (51), the supporting plate (53) is positioned on one side of the pipe opening of the rotary ball launching pipe (32), and one side of the supporting plate (53) abuts against the telescopic head of the telescopic elastic device (52); the bottom of the supporting plate (53) is rotatably provided with a roller (54), the roller (54) is an arc-shaped column, and the roller (54) is positioned on one side of a passage opening of the spin ball launching tube (32); gear teeth are machined on the outer circle of one side, away from the nozzle of the rotary ball launching tube (32), of the rotary sleeve (51), and a driving gear (55) is meshed with the outer side of the rotary sleeve (51) through the gear teeth; the driving gear (55) is arranged at one end of the first transmission shaft (56), and one end, far away from the driving gear (55), of the first transmission shaft (56) is mechanically connected with a stepping motor (57);

the ball hopper (1), the ball feeding pipe (2), the launching pipe (3), the air compressor (4), the ball rotating adjusting device (5), the first electric valve (6), the second electric valve (7) and the third electric valve (8) are all erected inside the shell (9); the upper end of the ball hopper (1) extends out of the shell (9); a first ball-emitting opening (91) is formed in the position, corresponding to the pipe orifice of the flat ball-emitting pipe (31), of the shell (9); a second ball serving port (92) is formed in the position, corresponding to the pipe orifice of the rotary ball launching pipe (32), of the shell (9);

a pitch angle adjusting device is arranged outside the shell (9) and is arranged inside the protective cover (11); a horizontal angle adjusting device (14), a height adjusting device (15) and a walking supporting base (16) are sequentially arranged below the protective cover (11).

2. The tennis ball serving machine of claim 1, further comprising: the control device is electrically connected with the first electric valve (6), the second electric valve (7), the third electric valve (8), the stepping motor (57), the pitch angle adjusting device, the horizontal angle adjusting device (14), the height adjusting device (15) and the walking support base (16) respectively, and can control the first electric valve (6), the second electric valve (7), the third electric valve (8), the stepping motor (57), the pitch angle adjusting device, the horizontal angle adjusting device (14), the height adjusting device (15) and the walking support base (16) respectively.

3. Tennis pitching machine according to claim 2, wherein said pitch angle adjustment means comprise a second transmission shaft (10), a third transmission shaft (12) and a double-headed motor (13); the second transmission shafts (10) are symmetrically arranged on two sides of the shell (9), and one end, far away from the shell (9), of each second transmission shaft (10) is rotatably arranged inside the protective cover (11); a third transmission shaft (12) is rotatably arranged below the second transmission shaft (10) in the protective cover (11), and a double-head motor (13) is mechanically connected between the third transmission shafts (12); a chain transmission is arranged between the second transmission shaft (10) and the third transmission shaft (12); the control device is electrically connected with the double-head motor (13).

4. Tennis pitching machine according to claim 1, wherein said horizontal angle adjustment means (14) is an electric rotating table.

5. Tennis pitching machine according to claim 1, wherein said height adjustment means (15) is an electric lifting platform.

6. Tennis pitching machine according to claim 1, wherein said walking support base (16) is a crawler-type base.

Images