CN114100097A

CN114100097A - Tennis precision training device with auxiliary positioning mechanism

Info

Publication number: CN114100097A
Application number: CN202111337457.8A
Authority: CN
Inventors: 董雷
Original assignee: Binzhou University
Current assignee: Binzhou University
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-03-01
Anticipated expiration: 2041-11-12
Also published as: CN114100097B

Abstract

The invention discloses a tennis accuracy training device with an auxiliary positioning mechanism, and relates to the technical field of tennis training devices. The structure of the invention comprises a positioning wall, a ball collecting mechanism and a ball serving mechanism, wherein the front lower end and the rear lower end of the positioning wall are respectively fixed with a supporting leg, the right side of the supporting leg at the front lower end is provided with a first side rail, and the right side of the supporting leg at the rear lower end is provided with a second side rail; the ball collecting mechanism is arranged on the left side of the positioning wall; the ball serving mechanism is arranged in the ball receiving mechanism and is communicated with the ball receiving mechanism through a connecting pipe. The invention has the functions of returning and positioning, automatically collecting and throwing the ball.

Description

Tennis precision training device with auxiliary positioning mechanism

Technical Field

The invention relates to the technical field of tennis training devices, in particular to a tennis accuracy training device with an auxiliary positioning mechanism.

Background

Tennis is a popular ball game. At least two persons are needed for playing tennis, but the number of the persons is limited or even not during daily training, and the persons need to train themselves. Traditionally, training is performed facing the wall.

In the prior art, the pitching machine automatically serves balls, but only the accuracy of receiving the balls can be trained, and the requirement on the accuracy of returning the balls is not strict; secondly, tennis balls on the ground need to be collected manually; in addition, tennis balls in the pitching machine need to be manually released after being used up.

Therefore, those skilled in the art have provided a tennis accuracy training device with an auxiliary positioning mechanism to solve the above problems in the prior art.

Disclosure of Invention

The invention aims to solve the technical problems that the pitching machine in the prior art can not train the tennis return accuracy, and needs to manually collect and release tennis balls.

In order to solve the technical problems, the invention provides a tennis accuracy training device with an auxiliary positioning mechanism, which comprises a positioning wall, a ball collecting mechanism and a ball serving mechanism, wherein a supporting leg is respectively fixed at the front lower end and the rear lower end of the positioning wall, a first side rail is arranged on the right side of the supporting leg at the front lower end, and a second side rail is arranged on the right side of the supporting leg at the rear lower end; the ball collecting mechanism is arranged on the left side of the positioning wall; the ball serving mechanism is arranged in the ball receiving mechanism and is communicated with the ball receiving mechanism through a connecting pipe.

As a further scheme of the invention: the structure of the positioning wall comprises a wallboard, a unit induction plate, a pressure sensor and a fixed cylinder, wherein the wallboard is in a rectangular board groove structure, and two support legs are respectively fixed at the front lower end and the rear lower end of the wallboard; the pressure sensors are uniformly fixed on the left side wall in the groove of the wallboard; the fixed cylinders are of a tubular structure, a plurality of fixed cylinders are arranged, each fixed cylinder is fixed at the right end of one pressure sensor, and a green indicator light and a red indicator light are arranged in a tube hole of each fixed cylinder; the unit tablet is rectangular platelike structure, the unit tablet has a plurality of, and even arrange on the notch face of wallboard, respectively is provided with a distance sensor in the central through-hole of every unit tablet, and the right-hand member at a fixed cylinder is respectively fixed to every unit tablet.

As a further scheme of the invention: the structure of the ball collecting mechanism comprises a ball collecting rail, a motor, a ball collecting hopper and a ball receiving cup, wherein the ball collecting rail is of a triangular prism groove structure, right-end notches are fixed on a wall plate and the left side wall of a supporting leg, the bottom end part of the ball collecting rail is embedded into a groove in the ground of a court, a driving wheel and a driven wheel are respectively arranged on the left middle side and the left lower side in the groove of the ball collecting rail, a belt is wound on the peripheries of the driving wheel and the driven wheel, and a plurality of L-shaped shovel plates are fixed on the belt; the motor is fixed on the front side wall of the ball collecting fence and drives the driving wheel to rotate clockwise; the ball collecting hopper is of an inverted quadrangular pyramid type pipe shell structure, and the front end and the rear end of the ball collecting hopper are respectively fixed with the front wall and the rear wall of the ball collecting fence; connect the cell body structure that the ball cup is the cuboid, and fix the bottom of receiving the ball fill, connect the inslot of ball cup to be provided with the spring pipe, the spring pipe is the single mouthful tubular structure of four arriss, and the left end opening is fixed on the left wall that connects the ball cup, connect and be fixed with a cylinder on the left side wall of ball cup, the right-hand member of the telescopic link of a cylinder is fixed on the right wall of spring pipe, connect the right side wall of ball cup and the last port intercommunication of connecting pipe.

As a further scheme of the invention: the structure of the ball serving mechanism comprises a support plate, a rotating seat, a ball outlet pipe and an electric push rod, wherein the support plate is of a rectangular plate-shaped structure, the front end and the rear end of the support plate are respectively fixed on the front wall and the rear wall of the ball collecting fence, a first motor is fixed below a through hole of the support plate, and the top end of a rotor of the first motor is fixedly connected with the bottom end of the rotating seat; the rotating seat is of an inverted T-shaped structure and is arranged on the top side wall of the support plate, and the top end of the rotating seat is hinged with the left end of the ball outlet pipe; the ball outlet pipe is of a cylindrical tubular structure, a second cylinder is fixed in a pipe hole at the left part of the ball outlet pipe, a punch is fixed at the right end of a telescopic rod of the second cylinder, a circular positioning ring is fixed in a pipe hole of the ball outlet pipe at the right side of the punch, and the top wall of the ball outlet pipe is communicated with the lower port of the connecting pipe; one end of the electric push rod is hinged with the rotating seat, and the other end of the electric push rod is hinged with the bottom side wall of the ball outlet pipe.

As a further scheme of the invention: and a spring leaf is fixed on the side wall of the tube hole of the ball outlet tube on the right side of the connecting tube.

As a further scheme of the invention: the first side rail structurally comprises a first shell, an air pipe and a fan, wherein the first shell is of a quadrangular prism shell structure; the air pipe is of a cylindrical tubular structure, two ends of the air pipe are closed, a cylindrical blow pipe is fixed in each of a plurality of through holes in the rear side wall of the air pipe, and the blow pipe is inserted into the through hole in the rear wall of the first shell; the fan sets up on the top lateral wall of shell No. one, the air outlet and the tuber pipe intercommunication of fan.

As a further scheme of the invention: the structure of the second side rail comprises a second shell, a roller and a second motor, wherein the second shell is of an L-shaped cylinder structure, and a plurality of chain wheels are arranged in a cavity at the top of the second shell and are connected through a chain; the plurality of rollers are uniformly arranged in the space at the front lower part of the second shell, and the top end of the central shaft of each roller is fixedly connected with a chain wheel; no. two motors set up on the top lateral wall of No. two shells, and rotor bottom and a sprocket fixed connection.

As a further scheme of the invention: the cavity of the supporting leg at the lower end is internally provided with a central control unit, a display screen is arranged in the through hole of the right wall, and the central control unit is electrically connected with the display screen, the positioning wall, the ball receiving mechanism, the ball serving mechanism, the first side rail and the second side rail.

The invention has the beneficial effects that:

(1) the tennis training device is provided with the positioning wall, the tennis training device in the prior art is only responsible for serving, and the quality of returned tennis needs to be observed through human eyes; the invention is provided with the positioning wall, the track of the returned ball can be judged through the sensing data of the plurality of distance sensors, the impact force of the returned ball is sensed through the sensing data of the pressure sensor, then whether the returned ball is qualified or not is visually known through observing the on and off of the red and green indicating lamps, and the data summary is displayed on the display screen.

(2) The invention is provided with the side rail, and the tennis training device in the prior art can not collect tennis balls on the ground; the tennis ball collecting fence is provided with the side fence, the first side fence can blow air through the fan to blow tennis balls on the ground to the second side fence, and the rollers on the second side fence are conveyed to the ball collecting fence leftwards.

(3) The tennis training device is provided with the ball collecting mechanism, and the tennis training device in the prior art needs to be filled with balls manually after tennis balls are used up; the tennis ball collecting device adopts the rotary shovel plate to shovel tennis balls collected in the ball collecting fence upwards into the ball collecting hopper, and then the tennis balls in the ball collecting hopper are controlled to enter the ball outlet pipe to serve singly through the extension and contraction of the first air cylinder.

Drawings

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

FIG. 2 is a perspective view of the left portion of FIG. 1;

FIG. 3 is a cross-sectional view of the top of the wall panel;

FIG. 4 is a cross-sectional view of the ball collecting rail;

FIG. 5 is a cross-sectional view of the ball receiving hopper;

FIG. 6 is a cross-sectional view of the ball serving mechanism;

FIG. 7 is a top cross-sectional view of a portion of the first sidebar;

fig. 8 is a partial top sectional view of the second sidebar.

Wherein: wall panel 10, unit induction plate 11, distance sensor 12, pressure sensor 13, fixed cylinder 14, green pilot lamp 15, red pilot lamp 16, landing leg 17, display screen 18, ball collecting fence 19, driving wheel 20, driven wheel 21, belt 22, shovel plate 23, motor 24, ball receiving hopper 25, ball receiving cup 26, connecting pipe 27, spring pipe 28, first cylinder 29, support plate 30, rotating seat 31, first motor 32, ball outlet pipe 33, electric push rod 34, positioning ring 35, second cylinder 36, punch 37, first shell 38, air duct 39, blowpipe 40, fan 41, second shell 42, roller 43, sprocket 44, chain 45, second motor 46, spring piece 47.

Detailed Description

The tennis accuracy training device with the auxiliary positioning mechanism provided by the embodiment has a structure shown in fig. 1-8, and comprises a positioning wall, a ball collecting mechanism and a ball serving mechanism, wherein a supporting leg is respectively fixed at the front lower end and the rear lower end of the positioning wall, a first side rail is arranged on the right side of the supporting leg at the front lower end, tennis balls on the ground are blown to a second side rail by the first side rail, the second side rail is arranged on the right side of the supporting leg at the rear lower end, and the second side rail conveys the adjacent tennis balls into the ball collecting mechanism; the tennis ball collecting mechanism is arranged on the left side of the positioning wall and used for automatically collecting tennis balls; the ball serving mechanism is arranged in the ball receiving mechanism and is communicated with the ball receiving mechanism through a connecting pipe 27 for launching the tennis ball.

The structure of the positioning wall comprises a wallboard 10, a unit induction plate 11, a pressure sensor 13 and a fixing cylinder 14, wherein the wallboard 10 is of a rectangular board groove structure, and two support legs 17 are respectively fixed at the front lower end and the rear lower end of the wallboard 10; a plurality of pressure sensors 13 are uniformly fixed on the left side wall in the groove of the wall plate 10, and the pressure sensors 13 sense the impact force of the returned ball; the fixed cylinders 14 are of a tubular structure, a plurality of fixed cylinders 14 are provided, each fixed cylinder 14 is fixed at the right end of one pressure sensor 13, a green indicator light 15 and a red indicator light 16 are respectively arranged in a pipe hole of each fixed cylinder 14, when the returned balls are qualified, the green indicator light 15 is turned on, and when the returned balls are unqualified, the red indicator light 16 is turned on; the unit induction plates 11 are of rectangular plate-shaped structures, a plurality of unit induction plates 11 are uniformly distributed on the notch surface of the wall plate 10, a distance sensor 12 is arranged in a central through hole of each unit induction plate 11, each unit induction plate 11 is fixed at the right end of a fixed cylinder 14, a returned ball impacts on each unit induction plate 11, and the distance sensor 12 senses the distance of the tennis ball.

The structure of the ball collecting mechanism comprises a ball collecting fence 19, a motor 24, a ball collecting hopper 25 and a ball receiving cup 26, wherein the ball collecting fence 19 is of a triangular prism groove structure, a right-end notch is fixed on the left side wall of the wall plate 10 and the supporting leg 17, the bottom end part of the ball collecting fence 19 is embedded into a groove on the ground of a court, tennis balls in the court conveniently roll into the ball collecting fence 19 and are collected to the lower left part of the groove of the ball collecting fence 19, a driving wheel 20 and a driven wheel 21 are respectively arranged on the left middle side and the left lower side in the groove of the ball collecting fence 19, a belt 22 is wound on the peripheries of the driving wheel 20 and the driven wheel 21, a plurality of L-shaped shoveling plates 23 are fixed on the belt 22, the driving wheel 20 drives the driven wheel 21 to rotate through the belt 22, so that the belt 22 rotates clockwise around the driving wheel 20 and the driven wheel 21, the shoveling plates 23 rotate along with the belt 22, when the shoveling plates 23 rotate to the driven wheel 21, scooping up the tennis balls at the lower left part of the ball collecting fence 19 and transmitting the tennis balls upwards; the motor 24 is fixed on the front side wall of the ball collecting fence 19, and the motor 24 drives the driving wheel 20 to rotate clockwise; the ball collecting hopper 25 is of an inverted quadrangular pyramid-shaped pipe shell structure, the front end and the rear end of the ball collecting hopper 25 are respectively fixed with the front wall and the rear wall of the ball collecting fence 19, and when the shovel plate 23 rotates to the upper side of the driving wheel 20, tennis balls in the shovel plate 23 roll down into the ball collecting hopper 25; the tennis receiving cup is of a cuboid groove structure and is fixed at the bottom end of the tennis receiving hopper 25, a spring tube 28 is arranged in a groove of the tennis receiving cup 26, the spring tube 28 is of a four-edge single-opening tubular structure, the left end opening of the spring tube 28 is fixed on the left wall of the tennis receiving cup 26, a first air cylinder 29 is fixed on the left side wall of the tennis receiving cup 26, the right end of a telescopic rod of the first air cylinder 29 is fixed on the right wall of the spring tube 28, the right side wall of the tennis receiving cup 26 is communicated with an upper end opening of the connecting pipe 27, after the first air cylinder 29 contracts, the spring tube 28 is pulled to move leftwards and be folded, so that a tennis ball in the tennis receiving hopper 25 falls into the tennis receiving cup 26, after the first air cylinder 29 extends, the spring tube 28 is pushed to move rightwards and be stretched, and the spring tube 28 pushes the tennis ball into the connecting pipe 27.

The structure of the service mechanism comprises a support plate 30, a rotating seat 31, a ball outlet pipe 33 and an electric push rod 34, wherein the support plate 30 is of a rectangular plate-shaped structure, the front end and the rear end of the support plate 30 are respectively fixed on the front wall and the rear wall of the ball collecting fence 19, a first motor 32 is fixed below a through hole of the support plate 30, the top end of a rotor of the first motor 32 is fixedly connected with the bottom end of the rotating seat 31, and the first motor 32 drives the rotating seat 31 to horizontally rotate; the rotating seat 31 is of an inverted T-shaped structure and is arranged on the top side wall of the support plate 30, the top end of the rotating seat 31 is hinged with the left end of the ball outlet pipe 33, and the rotating seat 31 horizontally rotates to adjust the orientation of the ball outlet pipe 33; the tennis outlet pipe 33 is of a cylindrical tubular structure, a second cylinder 36 is fixed in a left pipe hole of the tennis outlet pipe 33, a punch 37 is fixed at the right end of a telescopic rod of the second cylinder 36, a circular positioning ring 35 is fixed in a pipe hole of the tennis outlet pipe 33 on the right side of the punch 37, the positioning ring 35 prevents tennis balls from rolling to the punch 37 to the left, the top wall of the tennis outlet pipe 33 is communicated with a lower port of the connecting pipe 27, tennis balls in the connecting pipe 27 fall into the tennis outlet pipe 33, the second cylinder 36 extends to drive the punch 37 to move to the right, the punch 37 penetrates through the positioning ring 35 to impact the tennis balls, and the tennis balls are sent out from the tennis outlet pipe 33; one end of the electric push rod 34 is hinged with the rotating seat 31, the other end of the electric push rod is hinged with the bottom side wall of the ball outlet pipe 33, the electric push rod 34 drives the ball outlet pipe 33 to rotate downwards after being extended, and drives the ball outlet pipe 33 to rotate downwards after being contracted.

A spring leaf 47 is fixed on the side wall of the pipe hole of the ball outlet pipe 33 on the right side of the connecting pipe 27, and the spring leaf 47 prevents the spring leaf 47 from rolling out of the ball outlet pipe 33 when the right end opening of the ball outlet pipe 33 faces downwards.

The first side rail comprises a first outer shell 38, an air pipe 39 and a fan 41, wherein the first outer shell 38 is of a quadrangular prism shell structure; the air pipe 39 is of a cylindrical tubular structure, two ends of the air pipe are closed, a cylindrical blow pipe 40 is fixed in each of a plurality of through holes in the rear side wall of the air pipe 39, the blow pipe 40 is inserted into a through hole in the rear wall of the first shell 38, and air in the air pipe 40 is blown out from the blow pipe 39, so that the tennis ball on the ground is pushed backwards to the second side rail by airflow; the blower 41 is arranged on the top side wall of the first shell 38, an air outlet of the blower 41 is communicated with the air pipe 39, and the blower 41 blows external air into the air pipe 39.

The structure of the second side rail comprises a second shell 42, rollers 43 and a second motor 46, wherein the second shell 42 is of an L-shaped cylinder structure, a plurality of chain wheels 44 are arranged in a top cavity of the second shell 42, the chain wheels 44 are connected through a chain 45, and the chain 45 drives the chain wheels 44 to rotate so that the rollers 43 rotate clockwise; a plurality of rollers 43 are uniformly arranged in the space at the front lower part of the second shell 42, the top end of the central shaft of each roller 43 is fixedly connected with a chain wheel 44, and the rollers 43 transmit tennis balls leftwards until the tennis balls roll into the ball collecting fence 19; no. two motors 46 set up on the top lateral wall of No. two shells, and rotor bottom and a sprocket 44 fixed connection, No. two motors 46 drive a sprocket 44 and rotate.

The utility model discloses a ball return device, including the landing leg 17, be provided with central control unit in the cavity of preceding lower extreme landing leg 17, and be provided with display screen 18 in the right wall through-hole, central control unit and display screen 18, location wall, receive ball mechanism, service mechanism, sidebar and No. two sidebar electric connection play the effect of controlling means operation, display screen 18 is used for showing qualified and unqualified number and the rate of accuracy of returning the ball.

The working principle of the invention is as follows: when serving, the first cylinder 29 contracts and pulls the spring tube 28 to move leftwards and fold, so that a tennis ball in the ball receiving hopper 25 falls into the ball receiving cup 26, after the first cylinder 29 extends, the spring tube 28 is pushed to move rightwards and stretch, and the spring tube 28 pushes the tennis ball into the connecting tube 27; the tennis ball in the connecting pipe 27 falls into the ball outlet pipe 33; the first motor 32 drives the rotating seat 31 to rotate horizontally, and the rotating seat 31 rotates horizontally to adjust the orientation of the ball outlet pipe 33; the electric push rod 34 extends to drive the ball outlet pipe 33 to rotate downwards, and contracts to drive the ball outlet pipe 33 to rotate downwards so as to adjust the angle of the ball outlet pipe 33; after the second cylinder 36 is extended, the punch 37 is driven to move rightwards, and the punch 37 penetrates through the positioning ring 35 to hit the tennis ball, so that the tennis ball is sent out from the ball outlet pipe 33. The invention can continuously continue the ball.

When returning, the ball hits the wall plate 10; when the returned ball approaches the wall plate 10, a distance sensor 12 senses the distance of the tennis ball every time the returned ball passes through the right side of the unit sensing plate 11 so as to calculate the track of the returned ball and judge the position of the returned ball hitting the opposite court; when the returned ball hits the unit induction plate 11, the pressure sensor 13 senses the impact force of the returned ball through the fixed cylinder 14; judging whether the returned ball is qualified or not according to the returned ball, the position and the force, wherein when the returned ball is qualified, the green indicating lamp 15 is lightened, and when the returned ball is unqualified, the red indicating lamp 16 is lightened, so that the visual indication is provided for the sportsman; and meanwhile, the display screen 18 updates the qualified and unqualified numbers and the accuracy rate of the returned balls. The invention can conveniently position the returned ball so as to train the accuracy of the returned ball.

When the tennis is collected, the fan 41 blows external air into the air pipe 39, and the air in the air pipe 40 is blown out from the blow pipe 39, so that the tennis on the ground is pushed backwards to the second side fence by airflow; the second motor 46 drives a chain wheel 44 to rotate, the chain 45 drives a plurality of chain wheels 44 to rotate, so that a plurality of roller wheels 43 rotate clockwise, and the roller wheels 43 transmit tennis balls leftwards until the tennis balls roll into the ball collecting fence 19; tennis balls are collected at the lower left part of the groove of the ball collecting fence 19, the motor 24 drives the driving wheel 20 to rotate clockwise, the driving wheel 20 drives the driven wheel 21 to rotate through the belt 22, the belt 22 rotates clockwise around the driving wheel 20 and the driven wheel 21, the shovel plate 23 rotates along with the belt 22, when the shovel plate 23 rotates to the position below the driven wheel 21, the tennis balls at the lower left part of the ball collecting fence 19 are shoveled and conveyed upwards, and when the shovel plate 23 rotates to the upper side of the driving wheel 20, the tennis balls in the shovel plate 23 roll down to the ball collecting hopper 25. The tennis ball collecting device has the function of automatically collecting tennis balls on the ground.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A tennis accuracy training device with an auxiliary positioning mechanism is characterized by comprising a positioning wall, a ball collecting mechanism and a ball serving mechanism, wherein a supporting leg is fixed at each of the front lower end and the rear lower end of the positioning wall, a first side rail is arranged on the right side of the supporting leg at the front lower end, and a second side rail is arranged on the right side of the supporting leg at the rear lower end; the ball collecting mechanism is arranged on the left side of the positioning wall; the ball serving mechanism is arranged in the ball receiving mechanism and is communicated with the ball receiving mechanism through a connecting pipe (27).

2. The tennis accuracy training device with the auxiliary positioning mechanism as claimed in claim 1, wherein: the structure of the positioning wall comprises a wallboard (10), a unit induction plate (11), a pressure sensor (13) and a fixing cylinder (14), wherein the wallboard (10) is of a rectangular plate groove structure, and two support legs (17) are respectively fixed at the front lower end and the rear lower end of the wallboard (10); a plurality of pressure sensors (13) are uniformly fixed on the left side wall in the groove of the wallboard (10); the fixed cylinders (14) are of a tubular structure, a plurality of fixed cylinders (14) are arranged, each fixed cylinder (14) is fixed at the right end of one pressure sensor (13), and a green indicator lamp (15) and a red indicator lamp (16) are arranged in a tube hole of each fixed cylinder (14); unit tablet (11) are rectangular platelike structure, unit tablet (11) have a plurality of, and even arrange on the notch face of wallboard (10), respectively are provided with one distance sensor (12) in the central through-hole of every unit tablet (11), and the right-hand member at a fixed cylinder (14) is respectively fixed in every unit tablet (11).

3. The tennis accuracy training device with the auxiliary positioning mechanism as claimed in claim 1, wherein: the structure of the ball collecting mechanism comprises a ball collecting rail (19), a motor (24), a ball collecting hopper (25) and a ball receiving cup (26), wherein the ball collecting rail (19) is of a triangular prism groove body structure, a right end notch is fixed on the left side wall of a wall plate (10) and a supporting leg (17), the bottom end part of the ball collecting rail (19) is embedded into a groove on the ground of a court, a driving wheel (20) and a driven wheel (21) are respectively arranged on the left middle side and the left lower side in the groove of the ball collecting rail (19), a belt (22) is wound on the peripheries of the driving wheel (20) and the driven wheel (21), and a plurality of L-shaped shovel plates (23) are fixed on the belt (22); the motor (24) is fixed on the front side wall of the ball collecting fence (19), and the motor (24) drives the driving wheel (20) to rotate clockwise; the ball collecting hopper (25) is of an inverted quadrangular pyramid-shaped pipe shell structure, and the front end and the rear end of the ball collecting hopper (25) are respectively fixed with the front wall and the rear wall of the ball collecting fence (19); connect the cell body structure that the ball cup is the cuboid, and fix the bottom of receiving ball fill (25), connect the inslot of ball cup (26) to be provided with spring pipe (28), spring pipe (28) are the tubular structure of four arriss list mouth, and the left end opening is fixed on the left wall that connects ball cup (26), connect and be fixed with cylinder (29) on the left side wall of ball cup (26), the right-hand member of the telescopic link of cylinder (29) is fixed on the right wall of spring pipe (28), connect the right side wall of ball cup (26) and the last port intercommunication of connecting pipe (27).

4. The tennis accuracy training device with the auxiliary positioning mechanism as claimed in claim 1, wherein: the structure of the ball serving mechanism comprises a support plate (30), a rotating seat (31), a ball outlet pipe (33) and an electric push rod (34), wherein the support plate (30) is of a rectangular plate-shaped structure, the front end and the rear end of the support plate (30) are respectively fixed on the front wall and the rear wall of a ball collecting fence (19), a first motor (32) is fixed below a through hole of the support plate (30), and the top end of a rotor of the first motor (32) is fixedly connected with the bottom end of the rotating seat (31); the rotating seat (31) is of an inverted T-shaped structure and is arranged on the top side wall of the support plate (30), and the top end of the rotating seat (31) is hinged with the left end of the ball outlet pipe (33); the ball outlet pipe (33) is of a cylindrical tubular structure, a second cylinder (36) is fixed in a left pipe hole of the ball outlet pipe (33), a punch (37) is fixed at the right end of a telescopic rod of the second cylinder (36), a circular positioning ring (35) is fixed in a pipe hole of the ball outlet pipe (33) on the right side of the punch (37), and the top wall of the ball outlet pipe (33) is communicated with a lower port of the connecting pipe (27); one end of the electric push rod (34) is hinged with the rotating seat (31), and the other end of the electric push rod is hinged with the bottom side wall of the ball outlet pipe (33).

5. The tennis accuracy training device with the auxiliary positioning mechanism as claimed in claim 4, wherein: a spring piece (47) is fixed on the side wall of the tube hole of the ball outlet tube (33) on the right side of the connecting tube (27).

6. The tennis accuracy training device with the auxiliary positioning mechanism as claimed in claim 1, wherein: the first side rail comprises a first shell (38), an air pipe (39) and a fan (41), wherein the first shell (38) is of a quadrangular prism shell structure; the air pipe (39) is of a cylindrical tubular structure, two ends of the air pipe are closed, a cylindrical blow pipe (40) is fixed in each of a plurality of through holes in the rear side wall of the air pipe (39), and the blow pipe (40) is inserted into a through hole in the rear wall of the first shell (38); the fan (41) is arranged on the top side wall of the first shell (38), and an air outlet of the fan (41) is communicated with the air pipe (39).

7. The tennis accuracy training device with the auxiliary positioning mechanism as claimed in claim 1, wherein: the structure of the second side rail comprises a second shell (42), rollers (43) and a second motor (46), wherein the second shell (42) is of an L-shaped cylinder structure, a plurality of chain wheels (44) are arranged in a top cavity of the second shell (42), and the chain wheels (44) are connected through a chain (45); a plurality of rollers (43) are uniformly arranged in the space at the front lower part of the second shell (42), and the top end of the central shaft of each roller (43) is fixedly connected with a chain wheel (44); no. two motors (46) set up on the top lateral wall of No. two shells, and rotor bottom and a sprocket (44) fixed connection.