CN112190907B

CN112190907B - Tennis continuous serving device

Info

Publication number: CN112190907B
Application number: CN202011011998.7A
Authority: CN
Inventors: 曲广财
Original assignee: Wenzhou Medical University
Current assignee: Wenzhou Medical University
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-30
Anticipated expiration: 2040-09-24
Also published as: CN112190907A

Abstract

The utility model provides a tennis continuous service device, includes the base, the lower extreme of top surface one side fixed connection back shaft of base, the periphery bottom surface middle part of launching tube is connected through universal ball bearing in the upper end of back shaft, a side end face opening of launching tube, the groove is seted up respectively on the front and back two sides of the periphery opposite side of launching tube, the thick pole of the second telescopic link that the fore-and-aft direction was placed passes through the axle bed and installs in the top surface of base, every second regulating plate fixed mounting second nut, fixed mounting locking device on every second regulating plate. Under the condition that this device service speed frequency is the same, the required running speed of user receiving tennis is just faster, and the user can change the reciprocal lead screw of different length, and then the swing angle of left side luffing motion and the fore-and-aft motion of launching tube, and then can adjust tennis launch angle scope, and then the intensity of adjustment training, and the user can select different modes according to the training condition of self to carry out the pertinence training, improve the training effect.

Description

Tennis continuous serving device

Technical Field

The invention belongs to the field of sports training equipment, and particularly relates to a tennis continuous serving device.

Background

Tennis is a ball game, usually performed between two single players or two pairs of players, who hit tennis with a tennis racket on a tennis court across a net, bred in france, born in uk, started to popularize and form a climax in the united states, now prevalent all over the world, called world's second-major ball game; with the gradual flourishing of tennis balls, people who learn tennis balls are more and more, but tennis learning needs long-time training, correct hitting posture can be trained to hit a ball better, each hitting posture needs a large amount of training, a large amount of tennis balls can be used in a large amount of training processes, but the tennis ball serving device in the prior art can only adjust the hitting direction or the hitting force, although the hitting direction and the hitting force can be adjusted, the angle and the force can be kept to launch the tennis balls after adjustment, and the training effect is poor. .

Disclosure of Invention

The invention provides a tennis continuous serving device, which is used for solving the defects in the prior art.

The invention is realized by the following technical scheme:

a tennis continuous serving device comprises a base, one side of the top surface of the base is fixedly connected with the lower end of a support shaft, the upper end of the support shaft is connected with the middle part of the bottom surface of the periphery of a launching tube through a universal ball bearing, the end surface of one side of the launching tube is open, the front and the back of the other side of the periphery of the launching tube are respectively provided with a through groove, the bottom surface of the other side of the periphery of the launching tube is fixedly connected with the middle part of the top surface of a mounting plate, the front and the back of the bottom surface of the mounting plate are respectively and fixedly provided with a launching motor, output shafts of the launching motors respectively penetrate through the mounting plate and are connected with the mounting plate through bearings, the periphery of the output shafts of the mounting plate is fixedly provided with launching wheels, the periphery parts of the two launching wheels are respectively positioned in the corresponding through grooves, the top surface of the other side of the periphery of the launching tube is fixedly connected with the lower end of a tennis inlet pipe, the lower end of the tennis inlet pipe is communicated with the interior of the launching tube, a tennis inlet device is fixedly connected with the lower end of a corrugated hose, the upper end of a corrugated hose is fixedly connected with a ball outlet of a ball inlet hopper, the end part of the bottom surface of the other side of the periphery of a launching tube is fixedly connected with the peripheral top surface of one end of a first telescopic rod, the other end of the first telescopic rod is connected with one side of a movable block through a universal ball bearing, one side of the top surface of the movable block and the other side of the front surface of the movable block are respectively provided with a first through hole, a movable shaft is respectively arranged in each first through hole, the movable shaft respectively passes through the corresponding first through hole, the periphery of the lower end of the movable shaft arranged in the up-down direction and the periphery of the rear end of the movable shaft arranged in the front-back direction are respectively provided with an external thread, the rear part of the other side of the top surface of a base is fixedly connected with the bottom surface of a vertical plate, the front surface of the vertical plate and the top surface of the base are respectively provided with a chute, two sliding blocks which can only slide along the sliding blocks are respectively arranged in each chute, and a first adjusting plate is fixedly arranged outside one sliding block in each chute, a second adjusting plate is fixedly arranged on the outer side of the other sliding block in each sliding groove, second through holes are respectively formed in the opposite surfaces of each first adjusting plate and the corresponding second adjusting plate, the inner wall of each second through hole is connected with the periphery of the rotating disc through a bearing, shaft couplers are respectively and fixedly arranged on the opposite surfaces of each two rotating discs corresponding to each other, a reciprocating screw rod is arranged between each two shaft couplers corresponding to each other, two ends of each reciprocating screw rod are respectively connected with the corresponding shaft couplers, a reciprocating screw nut in threaded fit with each reciprocating screw rod penetrates through each reciprocating screw rod, first nuts are respectively and fixedly arranged on the periphery of each reciprocating screw nut, the lower end of a movable shaft arranged in the vertical direction and the rear end of a movable shaft arranged in the front-back direction are respectively inserted into and in threaded fit with the corresponding first nuts, an adjusting motor is fixedly arranged on the rear portion of the other side of the top surface of the base, and a first bevel gear is fixedly arranged on the periphery of an output shaft of the adjusting motor, two first regulating plates are respectively fixedly connected with one end of a thin rod of a second telescopic rod, the upper end of an output shaft of an adjusting motor is fixedly connected with one end of a thick rod of the second telescopic rod placed in the vertical direction, a second bevel gear is fixedly installed at one end of the thick rod of the second telescopic rod placed in the front-back direction, the second bevel gear is meshed with a first bevel gear, the thick rod of the second telescopic rod placed in the front-back direction is installed on the top surface of the base through a shaft seat, a second nut is fixedly installed on each second regulating plate, and a locking device is fixedly installed on each second regulating plate.

The tennis continuous serving device comprises a through control groove, a baffle, an electric push rod, a moving block, a movable groove, a wedge block, a first spring, a push plate, a second spring, a limiting device, a pull rope and a through line hole, wherein the control groove is arranged on one side of the outer wall of a tennis inlet pipe, the baffle penetrates through the control groove, the middle parts of the front surface and the rear surface of the baffle are respectively connected with the inner wall of the control groove through a bearing and a torsional spring, the lower end of the electric push rod is fixedly connected with the peripheral top surface of the other side of the launching tube, the bottom surface of the moving block is fixedly connected with the upper end of the electric push rod, the movable groove is arranged on one side of the moving block, one side of the wedge block is positioned in the movable groove, the wedge surface of the wedge block faces downwards, one end of the first spring is fixedly connected with one side of the inner wall of the movable groove, the other end of the first spring is fixedly connected with one side of the wedge block, the push plate is positioned in the other side of the launching tube, one end of the second spring is fixedly connected with the end surface of the inner wall of the other side of the launching tube, the other end of the second spring is fixedly connected with one side of the push plate, the upper portion of one side of the push plate is fixedly connected with one end of the pull rope, the wire hole is formed in the end face of the inner wall of the other side of the launching tube, the pull rope penetrates through the wire hole, and the other end of the pull rope is fixedly connected with the other side of the moving block.

The tennis continuous serving device comprises a limiting hole and a limiting rod, wherein the limiting hole is formed in the lower portion of the end face of the inner wall of the other side of the launching tube, the limiting rod penetrates through the limiting hole, and one end of the limiting rod is fixedly connected with the lower portion of one side of the push plate.

According to the tennis continuous serving device, the four corners of the bottom surface of the base are respectively and fixedly provided with the universal wheels with locking functions.

The tennis continuous serving device comprises locking plates, screw holes and locking bolts, wherein the locking plates are respectively and fixedly connected with corresponding second adjusting plates, the screw holes are respectively formed in the locking plates, and the locking bolts penetrate through the screw holes and are in threaded fit with the screw holes.

According to the tennis continuous serving device, the launching motors are all servo motors and are all connected with the same controller through circuits.

The invention has the advantages that: the device is used for tennis training, a user pours a large amount of tennis balls into a ball inlet hopper, the tennis balls enter the ball inlet pipe along a corrugated hose, the user turns on two launching motors and an adjusting motor, output shafts of the two launching motors respectively drive corresponding launching wheels to rotate, the user presses the tennis balls into the space between the two launching wheels through the ball inlet device, after the launching wheels are in contact with the tennis balls, the launching wheels drive the tennis balls to move and give the tennis balls a certain initial speed, the tennis balls are sent out along a launching tube, tennis ball launching is further realized, the output shafts of the adjusting motors can directly drive second telescopic rods which are arranged in the vertical direction to rotate, the output shafts of the adjusting motors can drive transverse second telescopic rods to rotate through first bevel gears and second bevel gears, the two second telescopic rods rotate respectively through corresponding turntables and couplers to drive two reciprocating screw rods to rotate, the two reciprocating screw rods rotate to respectively drive corresponding reciprocating screw rods to reciprocate along the, reciprocating nuts respectively drive corresponding movable shafts to move through first nuts in a reciprocating mode, movable shafts arranged in the up-and-down direction move back and forth to drive movable blocks to move back and forth, the movable shafts arranged in the front-and-back direction move up and down in a reciprocating mode to drive the movable blocks to move up and down in a reciprocating mode, the movable blocks can drive the other side of the launching tube to move through a first telescopic rod in a reciprocating mode, the movable blocks can swing back and forth at the left end of the launching tube in the reciprocating mode and further change the horizontal plane direction of the launching tube, one end of the launching tube, namely the left side, can swing up and down in the reciprocating mode through the movable blocks, the vertical plane direction of the launching tube is changed, the launching tube can launch tennis balls in different directions, a user can detach two reciprocating screw rods from a coupler, the user rotates the two movable shafts to enable the movable shafts to be separated from the corresponding first nuts respectively, and opens a locking device to move a second adjusting plate, the user can detach the two reciprocating screw rods and the corresponding reciprocating screw nuts through the coupler to replace the reciprocating screw rods and the corresponding reciprocating screw nuts, so that the amplitude of the up-and-down swinging and the front-and-back swinging of the left side of the launching tube is changed, the launching range of the tennis ball launching device is changed, after the reciprocating screw rods and the corresponding reciprocating screw nuts are detached, the user can respectively screw the two movable shafts into the corresponding second nuts, the user can fix the second adjusting plate through the locking device, so that the left side of the launching tube does not swing, tennis balls are launched in a single direction, the user can detach the reciprocating screw rods which are placed in the up-and-down direction or the transverse reciprocating screw rods, screw the corresponding movable shafts into the corresponding second nuts, and only the left side of the launching tube can swing up-and-down or back-and-back, compared with the prior art, the tennis ball launching device can enable the left side of the launching tube to swing up and down and swing back and forth, so that the tennis ball can be launched towards different directions, a user can detach the two reciprocating screw rods and screw the movable shafts into the corresponding second nuts, so that the tennis ball can be launched towards only one direction, the user can enable the second adjusting plate to move and fix through the locking device, so that the fixed launching angle of the tennis ball can be adjusted, the user can detach the reciprocating screw rods or the transverse reciprocating screw rods which are placed in the up-and-down direction and screw the corresponding movable shafts into the corresponding second nuts, so that the left side of the launching tube can only swing up and down or swing back and forth, the training mode can be adjusted, the larger the tennis ball launching angle range is, the larger the position where the tennis ball can reach is, and the larger the running range required by the user is, under the condition that this device service speed frequency is the same, the required running speed of user's receiving tennis is just faster, user's training intensity is also big more, the reciprocal lead screw of different length can be changed to the user, and then the swing angle of left side luffing motion and the fore-and-aft motion of launching tube, and then can adjust tennis launch angle scope, and then the intensity of adjustment training, this device has multiple training mode, and then adjust training intensity, the user can select different modes according to the training condition of self, thereby carry out the pertinence training, improve the training effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of the line A of FIG. 1; FIG. 3 is an enlarged view of section I of FIG. 1; fig. 4 is a partial enlarged view of ii of fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A tennis continuous serving device comprises a base 1, wherein one side of the top surface of the base 1 is fixedly connected with the lower end of a supporting shaft 2, the upper end of the supporting shaft 2 is connected with the middle part of the bottom surface of the periphery of a launching tube 3 through a universal ball bearing, one side end surface of the launching tube 3 is open, the front side and the rear side of the other side of the periphery of the launching tube 3 are respectively provided with a through groove 4, the bottom surface of the other side of the periphery of the launching tube 3 is fixedly connected with the middle part of the top surface of a mounting plate 5, the front side and the rear side of the bottom surface of the mounting plate 5 are respectively and fixedly provided with a launching motor 6, the overlooking rotating direction of an output shaft of the motor 6 positioned in front is anticlockwise, the overlooking rotating direction of an output shaft of the motor 6 positioned in rear is clockwise, the output shaft of the launching motor 6 respectively penetrates through the mounting plate 5 and is connected with the mounting plate through a bearing, launching wheels 7 are fixedly arranged on the periphery of the output shafts of the mounting plate 5, the two launching wheels 7 are respectively positioned in the corresponding through grooves 4, the periphery of the launching wheels 7 can be contacted with the periphery of a tennis ball, the top surface of the other side of the periphery of the launching tube 3 is fixedly connected with the lower end of a ball inlet pipe 8, the lower end of the ball inlet pipe 8 is communicated with the inside of the launching tube 3, the ball inlet pipe 8 is positioned at the right side of the two launching wheels 7, a ball inlet device is arranged between the launching tube 3 and the ball inlet pipe 8, the ball inlet device can press the tennis ball into the space between the two launching wheels 7, the upper end of the ball inlet pipe 8 is fixedly connected with the lower end of a corrugated hose 22, the upper end of the corrugated hose 22 is fixedly connected with a ball outlet of a ball inlet hopper 23, the bottom surface end part of the other side of the periphery of the launching tube 3 is fixedly connected with the peripheral top surface of one end of a first telescopic rod 24, the other end of the first telescopic rod 24 is connected with one side of a movable block 25 through a universal ball bearing, one side of the top surface of the movable block 25 and the, the other first through hole 26 is arranged at the front right side of the movable block 25 in the front-back direction, a movable shaft 27 is respectively arranged in each first through hole 26, the movable shafts 27 respectively penetrate through the corresponding first through holes 26, the outer peripheries of the lower ends of the movable shafts 27 arranged in the up-down direction and the outer peripheries of the rear ends of the movable shafts 27 arranged in the front-back direction are respectively provided with an external thread, the rear part of the other side of the top surface of the base 1 is fixedly connected with the bottom surface of a vertical plate 28, one side of the outer periphery of the goal bucket 23 is fixedly connected with the top surface of the vertical plate 28 through a connecting rod, the structure can play a role of fixing the goal bucket 23, the front surface of the vertical plate 28 and the top surface of the base 1 are respectively provided with a sliding groove 29, the sliding grooves 29 on the vertical plate 28 are arranged in the up-down direction, the sliding grooves 29 on the base 1 are arranged in the front-back direction, two sliding blocks 30, a second adjusting plate 32 is fixedly installed at the outer side of the other sliding block 30 in each sliding chute 29, a sliding block 30 at the lower part in the sliding chute 29 placed in the vertical direction is fixedly connected with a corresponding first adjusting plate 31, a sliding block 30 at the upper part in the sliding chute 29 placed in the vertical direction is fixedly connected with a corresponding second adjusting plate 32, a sliding block 30 at the rear part in the sliding chute 29 placed in the front-rear direction is fixedly connected with a corresponding first adjusting plate 31, a sliding block 30 at the front part in the sliding chute 29 placed in the front-rear direction is fixedly connected with a corresponding second adjusting plate 32, the first adjusting plate 31 on the sliding chute 29 placed in the vertical direction is positioned below the corresponding second adjusting plate 32, the first adjusting plate 31 on the sliding chute 29 placed in the front-rear direction is positioned behind the corresponding second adjusting plate 32, the opposite surface of each first adjusting plate 31 and the corresponding second adjusting plate 32 is respectively provided with a second through hole 33, the inner wall of each second through hole 33 is connected with the periphery of the rotating disc 34 through a bearing, the opposite surfaces of every two corresponding turntables 34 are respectively fixedly provided with a shaft coupling, a reciprocating screw rod 35 is arranged between every two corresponding shaft couplings, the two ends of each reciprocating screw rod 35 are respectively connected with the corresponding shaft couplings, according to the common knowledge, the two end parts of each reciprocating screw rod 35 are not provided with screw threads, the non-screw thread parts can be arranged in the shaft couplings, the shaft couplings are the prior common knowledge, the two ends of each reciprocating screw rod 35 are connected with the shaft couplings, the application does not need to be repeated, each reciprocating screw rod 35 is penetrated through a reciprocating screw nut 36 in screw thread fit with the reciprocating screw rod, the periphery of each reciprocating screw nut 36 is respectively and fixedly provided with a first nut 37, the lower end of the movable shaft 27 arranged in the vertical direction and the rear end of the movable shaft 27 arranged in the front-back direction are respectively inserted into the corresponding first nuts 37 and are in screw thread fit with the same, the rear part of the other side of the top surface of the base 1 is fixedly provided with an adjusting motor 38, a first bevel gear 39 is fixedly arranged on the periphery of an output shaft of the adjusting motor 38, two first adjusting plates 31 are respectively and fixedly connected with one end of a thin rod of a second telescopic rod 40, the second telescopic rods 40 are multi-section telescopic rods, one end of a thick rod of the second telescopic rod 40 which is arranged in the up-down direction is fixedly connected with the upper end of the output shaft of the adjusting motor 38, one end of a thick rod of the second telescopic rod 40 which is arranged in the front-back direction is fixedly installed with a second bevel gear 41, the second bevel gear 41 is meshed with the first bevel gear 39, the thick rod of the second telescopic rod 40 which is arranged in the front-back direction is installed on the top surface of the base 1 through a shaft seat, a second nut 42 is fixedly installed on each second adjusting plate 32, the lower end of the movable shaft 27 which is arranged in the up-down direction and the rear end of the movable shaft 27 which is arranged in the front-back direction can be respectively inserted into the second nut 42 for opposite use and matched with the screw threads, and a locking device is fixedly installed on each second adjusting plate 32, the locking device can fix the second adjusting plate 32 so that the second adjusting plate 32 cannot move. The device is used for tennis training, a user pours a large amount of tennis balls into a tennis inlet hopper 23, the tennis balls enter a tennis inlet pipe 8 along a corrugated hose 22, the user turns on two launching motors 6 and an adjusting motor 38, output shafts of the two launching motors 6 respectively drive corresponding launching wheels 7 to rotate, the user presses the tennis balls into a space between the two launching wheels 7 through the tennis inlet device, after the launching wheels 7 are in contact with the tennis balls, the launching wheels 7 drive the tennis balls to move and give a certain initial speed to the tennis balls, the tennis balls are sent out along a launching tube 3 to further realize tennis launching, the output shafts of the adjusting motor 38 can directly drive second telescopic rods 40 which are arranged in the vertical direction to rotate through rotation of the output shafts of the adjusting motor 38, the output shafts of the adjusting motor 38 can drive transverse second telescopic rods 40 to rotate through first bevel gears 39 and second bevel gears 41, the two second telescopic rods 40 rotate and respectively drive two reciprocating screw rods 35 to rotate through corresponding turntables 34 and couplers, the two reciprocating screw rods 35 rotate to respectively drive the corresponding reciprocating screw nuts 36 to reciprocate along the reciprocating screw nuts, the reciprocating screw nuts 36 respectively drive the corresponding movable shafts 27 to move through the first nuts 37 in a reciprocating manner, the movable shafts 27 arranged in the up-and-down direction move back and forth to drive the movable blocks 25 to move back and forth, the movable shafts 27 arranged in the up-and-forth direction move back and forth to drive the movable blocks 25 to move back and forth, the movable blocks 25 can move to drive the other side of the launching tube 3 to move through the first telescopic rods 24, the left end of the launching tube 3 can swing back and forth through the back and forth reciprocating movement of the movable blocks 25, the horizontal plane direction of the launching tube 3 is changed, one end of the launching tube 3, namely the left side, can swing up and down through the up and down reciprocating movement of the movable blocks 25, the vertical plane direction of the launching tube 3 is changed, the launching tube 3 can launch tennis balls in different directions, a user can detach the two reciprocating screw rods 35 from the coupler, the user rotates the two movable shafts 27 to separate the movable shafts 27 from the corresponding first nuts 37 respectively, the user opens the locking device to move the second adjusting plate 32, the user can detach the two reciprocating screw rods 35 and the corresponding reciprocating screw nuts 36 through the coupler to replace the two reciprocating screw rods 35 and the corresponding reciprocating screw nuts 36, the user can replace the reciprocating screw rods 35 and the corresponding reciprocating screw nuts 36 with different lengths, so that the amplitude of the up-and-down swing and the front-and-back swing of the left side of the launching tube 3 is changed, thereby changing the tennis launching range of the device, after the user detaches the reciprocating screw rods 35 and the corresponding reciprocating screw nuts 36, the user can screw the two movable shafts 27 into the corresponding second nuts 42 respectively, the user fixes the second adjusting plate 32 through the locking device, so that the left side of the launching tube 3 does not swing to launch tennis in a single direction, the user can detach the reciprocating screw rods 35 or the transverse reciprocating screw rods 35 placed in the up-and-down direction, and the corresponding movable shaft 27 is screwed into the corresponding second nut 42, so that the left side of the launching tube 3 can only swing up and down or back and forth, compared with the prior art, the device can swing up and down and back and forth on the left side of the launching tube 3, so that the device can launch tennis balls in different directions, a user can detach the two reciprocating screw rods 35 and screw the movable shaft 27 into the corresponding second nut 42, so that the device can launch tennis balls only in one direction, the user can move and fix the second adjusting plate 32 through the locking device, so as to adjust the fixed launching angle of the tennis balls, the user can detach the reciprocating screw rods 35 or the transverse reciprocating screw rods 35 which are placed up and down, and screw the corresponding movable shaft 27 into the corresponding second nut 42, so that the left side of the launching tube 3 can only swing up and down or back and forth, thereby realize adjusting the training mode, tennis launch angle scope is bigger, the position that tennis can reach is bigger, and then make the scope that the user needs to run bigger, under the same circumstances of this device service speed frequency, the more fast the user receives the required running speed of tennis, user's training intensity is also bigger, the user can change the reciprocal lead screw 35 of different length, and then launch the swing angle of left side luffing motion and the luffing motion of section of thick bamboo 3, and then can adjust tennis launch angle scope, and then adjust the intensity of training, this device has multiple training mode, and then adjust training intensity, the user can select different modes according to the training condition of self, thereby carry out the pertinence training, improve the training effect.

Specifically, as shown in fig. 1, 3 or 4, the goal device described in this embodiment is composed of a through control groove 9, a baffle plate 10, an electric push rod 11, a moving block 12, a movable groove 13, a wedge block 14, a first spring 15, a push plate 16, a second spring 17, a limiting device, a pull rope 20, and a through hole 21, the control groove 9 is opened on one side of the outer wall of the goal tube 8, the baffle plate 10 passes through the control groove 9, the middle parts of the front and rear surfaces of the baffle plate 10 are respectively connected to the inner wall of the control groove 9 through a bearing and a torsion spring, the front and rear surfaces of the baffle plate 10 are respectively and fixedly connected to the inner wall of the control groove 9, the outer ring of the bearing is respectively and fixedly connected to the inner wall of the control groove 9, the front and rear surfaces of the baffle plate 10 are respectively and fixedly connected to one end of the torsion spring, the other end of the torsion spring is fixedly connected to the inner wall of the control groove 9, the bearing respectively passes through the corresponding torsion springs, the torsion springs give a clockwise rotating force to the baffle plate 10, and the torsion spring force of the torsion spring is much greater than the gravity of the tennis ball, the right side of the bottom surface of the inner wall of the control groove 9 is fixedly connected with the bottom surface of a stop block, the top surface of the stop block is contacted with the bottom surface of the baffle plate 10, the stop block is positioned at the right side of the middle part of the baffle plate 10, the stop block can enable the baffle plate 10 to rotate clockwise under the action of torsional spring force to play a limiting role, the lower end of an electric push rod 11 is fixedly connected with the top surface of the other side of the launching tube 3, the electric push rod 11 is connected with a controller through a circuit, the controller can enable the electric push rod 11 to stretch and retract in a reciprocating mode, the bottom surface of a moving block 12 is fixedly connected with the upper end of the electric push rod 11, a movable groove 13 is arranged at one side of the moving block 12, one side of a wedge block 14 is positioned in the movable groove 13, the wedge surface of the wedge block 14 faces downwards, one end of a first spring 15 is fixedly connected with one side of the inner wall of the movable groove 13, the other end of the first spring 15 is fixedly connected with one side of the wedge block 14, a push plate 16 is positioned in the other side of the launching tube 3, one end of a second spring 17 is fixedly connected with the end surface of the inner wall of the launching tube 3, the other end fixed connection push pedal 16 of second spring 17 one side, the one end of one side upper portion fixed connection stay cord 20 of push pedal 16, line hole 21 is seted up in the opposite side inner wall terminal surface of launching tube 3, stay cord 20 passes line hole 21, the opposite side of the other end fixed connection movable block 12 of stay cord 20, the leading wheel is installed through the mounting bracket to the outer wall opposite side terminal surface of launching tube 3, stay cord 20 bypasses the leading wheel, the leading wheel can avoid stay cord 20 and the outer wall opposite side terminal surface contact of launching tube 3, thereby reduce the wearing and tearing of stay cord 20, the service life of this device is prolonged. A user pours a large amount of tennis balls into the tennis inlet hopper 23, the user opens the controller, the controller controls the electric push rod 11 to stretch, the electric push rod 11 extends to drive the moving block 12 to move upwards, the moving block 12 moves downwards to drive the wedge block 14 to move upwards, the wedge block 14 moves upwards and contacts with the baffle 10 to further drive the baffle 10 to rotate anticlockwise, the baffle 10 rotates anticlockwise to enable the left side of the baffle 10 not to block the tennis balls, meanwhile, the moving block 12 pulls the push plate 16 to move rightwards through the pull rope 20, the push plate 16 moves rightwards to enable the second spring 17 to be compressed, the tennis balls enter the launching tube 3 along the tennis inlet tube 8, the baffle 10 rotates and separates from the wedge block 14, the baffle 10 resets again, the electric push rod 11 contracts to enable the moving block 12 to move downwards, the moving block 12 moves downwards to enable the wedge surface of the wedge block 14 to contact with the baffle 10, and then the wedge block 14 moves rightwards to enter the movable groove 13, the wedge block 14 is reset under the action of elastic force of the first spring 15 after passing through the baffle 12, meanwhile, the moving block 12 moves downwards to enable the push plate 16 to move leftwards under the action of elastic force of the second spring 17, the push plate 16 pushes the tennis balls entering the launching tube 3 to move leftwards and enter between the two launching wheels 7, after the launching wheels 7 are in contact with the tennis balls, the launching wheels 7 give the tennis balls a certain initial speed, and then the tennis balls are launched, the controller controls the electric push rod 11 to stretch continuously, so that continuous sounding of the tennis balls can be realized, a user can control the time interval between every stretching of the electric push rod 11, and then the time interval between the launching of the tennis balls can be controlled, and the training of the user is facilitated.

Specifically, as shown in fig. 1 or 3, the limiting device according to this embodiment is composed of a limiting hole 18 and a limiting rod 19, the limiting hole 18 is formed in the lower portion of the inner wall end face of the other side of the launch barrel 3, the limiting rod 19 penetrates through the limiting hole 18, and one end of the limiting rod 19 is fixedly connected to the lower portion of one side of the push plate 16. The limiting rod 19 and the limiting hole 18 can limit the push plate 16, so that the situation that the device cannot normally operate due to the fact that the push plate 16 is inclined is prevented.

Further, as shown in fig. 1, universal wheels 43 with locking function are fixedly mounted at four corners of the bottom surface of the base 1 in the embodiment. The universal wheel 43 convenient to use person removes this device, and the convenient to use person adjusts the position of this device, and the user is more convenient, and the user can lock the universal wheel 43 to fix this device.

Further, as shown in fig. 1 or 2, the locking device of the present embodiment is composed of locking plates 44, screw holes 45 and locking bolts 46, the locking plates 44 are respectively fixedly connected to the corresponding second adjusting plates 32, the screw holes 45 are respectively opened on the locking plates 44, the locking bolts 46 pass through the screw holes 45 and are in threaded engagement with the screw holes 45, and the locking bolts 46 can respectively contact with the top surface of the base 1 or the front surface of the vertical plate 28. The user forward rotates the locking bolt 46 to move the locking bolt 46 backward or downward, so that the locking bolt 46 contacts with the top surface of the base 1 or the front surface of the vertical plate 28, the locking bolt 46 presses the top surface of the base 1 or the front surface of the vertical plate 28 to generate friction force, and the second adjusting plate 32 cannot move.

Furthermore, as shown in fig. 1, the transmitting motors 6 in this embodiment are all servo motors, and the transmitting motors 6 are all connected to the same controller through circuits. The servo motor can convert a voltage signal into a torque and a rotating speed, the servo motor can control the speed of an output shaft of the transmission motor 6, the position precision is very accurate, a user can control the rotating speed of the output shaft of the transmission motor 6 through the controller, the initial speed of the transmission of the tennis ball is further controlled, the user can control the rotating speeds of the output shafts of the two transmission motors 6 to have a speed difference, the speeds of the front side and the rear side of the periphery of the tennis ball are further different, the transmitted tennis ball rotates along the servo motor, and the response capability of a trainer to the rotating tennis ball is improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A tennis continuous serving device comprises a base (1), and is characterized in that: one side of the top surface of a base (1) is fixedly connected with the lower end of a support shaft (2), the upper end of the support shaft (2) is connected with the middle part of the bottom surface of the periphery of a launching tube (3) through a universal ball bearing, one side end surface of the launching tube (3) is open, the front side and the rear side of the other side of the periphery of the launching tube (3) are respectively provided with a through groove (4), the bottom surface of the other side of the periphery of the launching tube (3) is fixedly connected with the middle part of the top surface of a mounting plate (5), the front side and the rear side of the bottom surface of the mounting plate (5) are respectively and fixedly provided with a launching motor (6), the output shaft of the launching motor (6) respectively penetrates through the mounting plate (5) and is connected with the mounting plate through a bearing, the periphery of the output shaft of the mounting plate (5) is fixedly provided with launching wheels (7), the peripheral parts of the two launching wheels (7) are respectively positioned in the corresponding through grooves (4), the top surface of the other side of the periphery of the launching tube (3) is fixedly connected with the lower end of a ball inlet pipe (8), the lower end of the ball inlet pipe (8) is communicated with the interior of the launching tube (3), a ball inlet device is arranged between the launching tube (3) and the ball inlet pipe (8), the upper end of the ball inlet pipe (8) is fixedly connected with the lower end of a corrugated hose (22), the upper end of the corrugated hose (22) is fixedly connected with a ball outlet of a ball inlet hopper (23), the end part of the bottom surface of the other side of the periphery of the launching tube (3) is fixedly connected with the top surface of the periphery of one end of a first telescopic rod (24), the other end of the first telescopic rod (24) is connected with one side of a movable block (25) through a universal ball bearing, one side of the top surface of the movable block (25) and the other side of the front surface of the movable block (25) are respectively provided with a first through hole (26), a movable shaft (27) is respectively arranged in the first through holes (26), the movable shaft (27) respectively penetrates through the corresponding first through holes (26), the periphery of the lower end of the movable shaft (27) arranged in the up-down direction and the front-back direction are respectively provided with external threads, the rear part of the other side of the top surface of the base (1) is fixedly connected with the bottom surface of a vertical plate (28), sliding grooves (29) are respectively formed in the front of the vertical plate (28) and the top surface of the base (1), two sliding blocks (30) which can only slide along the sliding grooves are respectively arranged in each sliding groove (29), a first adjusting plate (31) is fixedly arranged on the outer side of one sliding block (30) in each sliding groove (29), a second adjusting plate (32) is fixedly arranged on the outer side of the other sliding block (30) in each sliding groove (29), second through holes (33) are respectively formed in the opposite surfaces of each first adjusting plate (31) and the corresponding second adjusting plate (32), the inner wall of each second through hole (33) is connected with the periphery of a rotating disc (34) through a bearing, shaft connectors are respectively and fixedly arranged on the opposite surfaces of each corresponding two rotating discs (34), and a reciprocating screw rod (35) is arranged between each corresponding two shaft couplers, two ends of each reciprocating screw rod (35) are respectively connected with corresponding couplers, each reciprocating screw rod (35) penetrates through a reciprocating screw nut (36) in threaded fit with the reciprocating screw nut, a first nut (37) is fixedly installed at the periphery of each reciprocating screw nut (36), the lower end of a movable shaft (27) placed in the up-and-down direction and the rear end of the movable shaft (27) placed in the front-and-back direction are respectively inserted into and in threaded fit with the corresponding first nut (37), an adjusting motor (38) is fixedly installed at the rear part of the other side of the top surface of the base (1), a first bevel gear (39) is fixedly installed at the periphery of an output shaft of the adjusting motor (38), two first adjusting plates (31) are respectively and fixedly connected with one end of a thin rod of a second telescopic rod (40), one end of a thick rod of the second telescopic rod (40) placed in the up-and-down direction is fixedly connected with the upper end of the output shaft of the adjusting motor (38), and a gear (41) is fixedly installed at one end of a thick rod of the second telescopic rod (40) placed in the front-and-back direction, the second bevel gear (41) is meshed with the first bevel gear (39), the thick rods of the second telescopic rods (40) which are placed in the front-back direction are mounted on the top surface of the base (1) through shaft seats, a second nut (42) is fixedly mounted on each second adjusting plate (32), and a locking device is fixedly mounted on each second adjusting plate (32).

2. A tennis continuous launching device as defined in claim 1, wherein: the ball inlet device consists of a through control groove (9), a baffle plate (10), an electric push rod (11), a moving block (12), a movable groove (13), a wedge block (14), a first spring (15), a push plate (16), a second spring (17), a limiting device, a pull rope (20) and a through line hole (21), wherein the control groove (9) is arranged on one side of the outer wall of a ball inlet pipe (8), the baffle plate (10) penetrates through the control groove (9), the middle parts of the front and rear surfaces of the baffle plate (10) are respectively connected with the inner wall of the control groove (9) through a bearing and a torsion spring, the lower end of the electric push rod (11) is fixedly connected with the peripheral top surface of the other side of the launching tube (3), the bottom surface of the moving block (12) is fixedly connected with the upper end of the electric push rod (11), the movable groove (13) is arranged on one side of the moving block (12), one side of the wedge block (14) is positioned in the movable groove (13), and the wedge surface of the wedge block (14) faces downwards, first spring (15) one end fixed connection movable groove (13) inner wall one side, first spring (15) other end fixed connection wedge (14) one side, push pedal (16) are located inside the opposite side of launch canister (3), the opposite side inner wall terminal surface of second spring (17) one end fixed connection launch canister (3), one side of the other end fixed connection push pedal (16) of second spring (17), the one end of one side upper portion fixed connection stay cord (20) of push pedal (16), the opposite side inner wall terminal surface of launch canister (3) is seted up in line hole (21), line hole (21) are passed in stay cord (20), the opposite side of the other end fixed connection movable block (12) of stay cord (20).

3. A tennis continuous launching device as defined in claim 2, wherein: the limiting device is composed of a limiting hole (18) and a limiting rod (19), the limiting hole (18) is formed in the lower portion of the end face of the inner wall of the other side of the launching tube (3), the limiting rod (19) penetrates through the limiting hole (18), and one end of the limiting rod (19) is fixedly connected with the lower portion of one side of the push plate (16).

4. A tennis continuous launching device as defined in claim 1, wherein: four corners of the bottom surface of the base (1) are respectively and fixedly provided with universal wheels (43) with locking functions.

5. A tennis continuous launching device as defined in claim 1, wherein: the locking device comprises a locking plate (44), screw holes (45) and locking bolts (46), the locking plate (44) is fixedly connected with the corresponding second adjusting plate (32) respectively, the screw holes (45) are arranged on the locking plate (44) respectively, and the locking bolts (46) penetrate through the screw holes (45) and are in threaded fit with the screw holes.

6. A tennis continuous launching device as defined in claim 1, wherein: the transmitting motors (6) are all servo motors, and the transmitting motors (6) are all in circuit connection with the same controller.