Tennis ball throwing mechanical arm for simulating tennis ball throwing action

Abstract

The invention discloses a tennis ball throwing mechanical arm simulating tennis ball throwing action, and relates to the technical field of ball throwing mechanical arms, the tennis ball throwing mechanical arm comprises an electric trolley, the top of the electric trolley is fixedly connected with a mechanical arm body, the output tail end of the mechanical arm body is fixedly connected with a mounting seat, and one side of the mounting seat is fixedly connected with an ejection cylinder; a ball inlet box is fixedly connected to one side of the ejection cylinder, a ball feeding cylinder is fixedly connected to the bottom of the ball inlet box, a ball pushing box is fixedly connected to the bottom of one side of the ball feeding cylinder, a plurality of pressing plates are arranged on the top of the connecting surrounding plate in an annular array mode, and hinge plates are fixedly connected to the bottoms of the pressing plates; according to the tennis ball throwing mechanical arm simulating the tennis ball throwing action, a tennis ball is thrown outwards under pushing of the mounting base and the connecting surrounding plate, an athlete conveniently hits a ball, it is guaranteed that the tennis ball is kept stable in the bouncing process, and the problem that the ball body deviates at the inclination angle is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ball throwing mechanical arms, in particular to a tennis throwing mechanical arm which simulates a tennis throwing action. Background Art

[0002] With the development of economy, education and the rapid improvement of living standards, people's opportunities and time to engage in various physical labor have been greatly reduced, while tennis continues to heat up. More and more people are joining the tennis army. Tennis has gradually become popular, and more and more people love tennis, especially among young people.

[0003] Existing tennis novices need to practice serving first during training. During the serving practice, a large number of tennis balls need to be thrown up, which not only requires a large number of tennis balls to be placed in pockets, causing inconvenience in movement, but also requires the players to constantly throw up tennis balls. Long-term single action will cause soreness in the players' arms. At the same time, after training for a period of time, the players need to pick up the balls again, which wastes physical energy and is inconvenient to use. Summary of the invention

[0004] The purpose of the present invention is to provide a tennis throwing mechanical arm that simulates the tennis throwing action, so as to solve the problems in the prior art that the tennis ball needs to be thrown up continuously, and the long-term single action will cause soreness in the athlete's arm. At the same time, after a period of training, the athlete needs to pick up the ball again, which wastes physical strength and is inconvenient to use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tennis throwing mechanical arm that simulates the action of throwing a tennis ball, comprising an electric trolley, a mechanical arm body is fixedly connected to the top of the electric trolley, an output end of the mechanical arm body is fixedly connected to a mounting seat, one side of the mounting seat is fixedly connected to a catapult tube, one side of the catapult tube is fixedly connected to a goal box, the bottom of the goal box is fixedly connected to an upper ball tube, the bottom of one side of the upper ball tube is fixedly connected to a ball pushing box, a shock-absorbing pad is fixedly connected to the inside of the catapult tube, a top plate is provided on the top of the shock-absorbing pad, a mounting base is provided on the top of the top plate, a connecting enclosure is fixedly connected to the top of the mounting base, a groove is provided inside the mounting base, and the inside of the connecting enclosure is fixedly connected in a circular array. The camming member is a pair of camming, each of which is connected to the rotation of the crankshaft and the crankshaft respectively. The camming member is connected to the rotation of the crankshaft and the crankshaft at the same time. The camming member is connected to the rotation of the crankshaft and the crankshaft at the same time.

[0006] Preferably, a plurality of limit grooves are provided on the outer side of the connecting enclosure, and the plurality of limit grooves are respectively matched with a plurality of push blocks; a plurality of limit rods are fixedly connected to the top end of the ejection tube in an annular array, and the plurality of limit rods respectively correspond to the plurality of limit grooves; a plurality of guide grooves are provided on the outer side of the mounting base and the connecting enclosure in an annular array; a plurality of guide rods are fixedly connected to the inside of the ejection tube in an annular array, and the plurality of guide rods are respectively matched with the plurality of guide grooves and slidably connected with the plurality of guide grooves; the connecting enclosure is limited by the guide rods, thereby improving the stability of the mounting base and the connecting enclosure.

[0007] Preferably, a mounting sleeve is fixedly connected to one side of the upper ball cylinder, a cylinder is fixedly connected inside the mounting sleeve, the output end of the cylinder passes through the bottom of the ejection tube and is slidably connected to the ejection tube, the top end of the cylinder output end passes through the shock-absorbing pad and is slidably connected to the shock-absorbing pad, the output end of the cylinder is fixedly connected to the top plate, the top plate is driven to rise by the cylinder, and the top plate pushes the mounting base and the connecting enclosure to rise.

[0008] Preferably, a guide cylinder is fixedly connected to the top of the ejection tube, a material baffle plate is hingedly connected to one side of the guide cylinder, a rotating rod is fixedly connected to one side of the top of the ejection tube, one end of the rotating rod is fixedly connected to a rotating plate, a torsion spring is provided on the outside of the rotating rod, two ends of the torsion spring are respectively fixedly connected to the rotating rod and the ejection tube, the rotating plate and the material baffle plate correspond, the rotating rod extends to one end of the ejection tube and is fixedly connected to a guide gear, the guide gear is rotatably connected to the inside of the ejection tube, the rotating rod is driven to rotate by the rotation of the guide gear, and the rotating plate is driven to rotate by the rotating rod.

[0009] Preferably, a transmission rack is connected to one side of the ejection tube for sliding up and down, and the transmission rack corresponds to the guide gear. A second spring is fixedly connected to the bottom of the transmission rack, and the bottom end of the second spring is fixedly connected to the inner wall of the ejection tube. A push rod is fixedly connected to one side of the bottom of the transmission rack. A vertical groove is opened inside one side wall of the ejection tube, and the push rod passes through the vertical groove and is slidably connected to the vertical groove. A connecting block is fixedly connected to one side of the connecting enclosure, and the connecting block corresponds to the push rod. When the connecting enclosure rises, it drives the connecting block to rise, and the connecting block pushes the push rod and the transmission rack to rise.

[0010] Preferably, a first electric push rod is fixedly connected to the rear side of the goal box, an L-shaped rod is fixedly connected to the output end of the first electric push rod, an end of the L-shaped rod away from the first electric push rod is fixedly connected to a ball pushing plate, a ball baffle plate is fixedly connected to the bottom of the ball pushing plate, a curved plate is fixedly connected to the front side of the ball baffle plate, and the curved plate is horizontally slidably connected to the top of the inside of the goal box. The L-shaped rod and the ball pushing plate are driven to move by the first electric push rod, so that the ball pushing plate pushes the tennis ball to move.

[0011] Preferably, a second electric push rod is fixedly connected to one side of the ball pushing box, the output end of the second electric push rod passes through the side wall of the ball pushing box and is slidably connected to the ball pushing box, the output end of the second electric push rod is fixedly connected to a movable plate, the top and bottom of the ball pushing box are provided with goal holes, and an elastic cloth is fixedly connected to the inside of the goal hole on the top of the ball pushing box, so that the tennis ball can push the elastic cloth to open and enter the inside of the ball pushing box.

[0012] Preferably, the bottom end of the upper ball cylinder is fixedly connected to a sliding sleeve, a baffle is slidably connected inside the sliding sleeve, a plurality of third springs are arranged inside the sliding sleeve, two ends of the third springs are respectively fixedly connected to the baffle and the sliding sleeve, an inclined plate is fixedly connected to the bottom of the baffle, and the inclined plate is slidably connected to the inside of the sliding sleeve, so that the inclined plate slides inside the sliding sleeve, so that the tennis ball at the bottom can enter the ball pushing box from the goal hole at the bottom.

[0013] Preferably, two piston cylinders are fixedly connected inside the guide cylinder, piston plates are slidably connected inside the two piston cylinders, vertical rods are fixedly connected to the bottom of the two piston plates, the two vertical rods respectively penetrate the two piston cylinders and are slidably connected to the two piston cylinders, bent plates are fixedly connected to the bottom ends of the two vertical rods, and fourth springs are sleeved on the outsides of the two vertical rods, the two ends of the fourth spring are fixedly connected to the piston cylinder and the bent plates respectively, and the two bent plates correspond to the two sides of the top of the connecting enclosure respectively, forming a damping effect to buffer the connecting enclosure.

[0014] Preferably, a cylinder is fixedly connected to the top of the ball pushing box, a ball pressing plate is slidably connected to the inside of the cylinder, a fifth spring is arranged inside the cylinder, two ends of the fifth spring are respectively fixedly connected to the cylinder and the ball pressing plate, a pushing screw rod is rotatably connected to one side of the upper ball cylinder, a motor is fixedly connected to one side of the bottom end of the upper ball cylinder, and the output end of the motor is fixedly connected to the pushing screw rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application enables multiple rods to pull multiple slide rails to flip outwards. When the multiple slide rails flip outwards, they drive multiple pressure plates and hinged plates to open outwards, so that the multiple pressure plates are separated from the top of the tennis ball. The tennis ball is thrown outwards under the push of the mounting base and the connecting panels, which is convenient for athletes to hit the ball and ensures that the tennis ball remains stable during the bounce process. The problem of the ball shifting will not occur at an inclined angle. When the ball moves to the top position of the ejection tube, the multiple pressure plates are automatically opened, so that the ball flies out stably to ensure that the strength and angle of the tennis ball throwing meet the predetermined parameters. After the throwing is completed, the connecting panels and the mounting base will be reset under the drive of the cylinder to prepare for the next throwing. The accuracy and reliability of tennis throwing are improved, providing an efficient and stable auxiliary tool for tennis training, saving the physical strength of sparring partners and athletes.

[0016] 2. The present application moves the ball pushing box to the top of the scattered tennis balls on the ground, and makes the ball pushing box cover the surface of the balls, so that the ball pushing box descends and the bottom of the inclined plate contacts the tennis balls. Because of the inclined design of the inclined plate, the balls push the inclined plate to contract toward the inside of the sliding sleeve, so that the balls enter the ball pushing box. After storing multiple tennis balls, the balls enter the upper ball cylinder along the trajectory of the upper ball cylinder and rise. When the balls inside the upper ball cylinder contact the pushing screw rod, the balls at the bottom continue to rise and rise from the elastic cloth into the cylinder, so that the balls are discharged into the cylinder. The second electric push rod is started to push the moving plate to move, and the pushing screw rod is driven to rotate by the motor, so that the pushing screw rod pushes the tennis balls to move up inside the upper ball cylinder, and the balls at the top are at the top inside the upper ball cylinder.

[0017] When the mounting base and the connecting panel are lowered, the first spring bounces up and pushes the slide bar to move upward, and the slide bar drives the push plate and the support rod to move upward, and then the support rod pushes the slide rail and the pressure plate to deflect inward, so that multiple pressure plates limit the ball and improve the stability of the ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the ejection tube of the present invention; Figure 3 It is a structural schematic diagram of the upper ball cylinder of the present invention; Figure 4 It is a structural schematic diagram of the ball pushing box of the present invention; Figure 5 It is a structural schematic diagram of the push screw rod of the present invention; Figure 6 It is a structural schematic diagram of connecting the enclosure plates of the present invention; Figure 7 It is a structural schematic diagram of the guide groove of the present invention; Figure 8 It is a structural schematic diagram of the mounting base of the present invention; Fig. 9 It is a structural schematic diagram of the pressing plate of the present invention; Fig.10 It is a structural schematic diagram of the limiting rod of the present invention; Fig.11 It is a structural schematic diagram of the material baffle plate of the present invention; Fig.12 For the present invention Fig.11 A magnified view of the structure of part A; Fig.13 It is a structural schematic diagram of the transmission rack of the present invention; Fig.14 It is a structural schematic diagram of the ball pushing board of the present invention; Fig.15 It is a structural schematic diagram of the inclined plate of the present invention; Fig.16 It is a structural schematic diagram of the baffle of the present invention; Fig.17It is a structural schematic diagram of the piston plate of the present invention.

[0019] Numbers in the figure: 1. Electric trolley; 2. Mechanical arm body; 3. Mounting seat; 4. Ejection tube; 5. Goal box; 6. Upper ball tube; 7. Push ball box; 8. Shock pad; 9. Top plate; 10. Mounting base; 11. Connecting enclosure; 12. Limit rail; 13. Slide bar; 14. Push plate; 15. Press plate; 16. Hinge plate; 17. Slide rail; 18. Support rod; 19. First spring; 20. Push block; 21. Limit rod; 22. Limit groove; 23. Guide groove; 24. Guide rod; 25. Mounting sleeve; 26. Cylinder; 27. Baffle plate; 28. Turn rod; 29. ​​Turn plate; 30. Torsion spring; 3 1. Vertical slot; 32. Guide gear; 33. Transmission rack; 34. Push rod; 35. Second spring; 36. First electric push rod; 37. L-shaped rod; 38. Push ball plate; 39. Ball baffle plate; 40. Arc plate; 41. Connecting block; 42. Second electric push rod; 43. Moving plate; 44. Sliding sleeve; 45. Baffle plate; 46. Inclined plate; 47. Third spring; 48. Elastic cloth; 49. Piston cylinder; 50. Piston plate; 51. Vertical rod; 52. Bending plate; 53. Fourth spring; 54. Guide cylinder; 55. Cylinder; 56. Fifth spring; 57. Ball pressure plate; 58. Push screw rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example: Figure 1-Figure 17As shown, the present invention provides a technical solution of a tennis throwing mechanical arm for simulating a tennis throwing action, comprising an electric trolley 1, a mechanical arm body 2 is fixedly connected to the top of the electric trolley 1, a mounting seat 3 is fixedly connected to the output end of the mechanical arm body 2, a ejection tube 4 is fixedly connected to one side of the mounting seat 3, a goal box 5 is fixedly connected to one side of the ejection tube 4, an upper ball tube 6 is fixedly connected to the bottom of the goal box 5, a ball pushing box 7 is fixedly connected to the bottom of one side of the upper ball tube 6, a shock absorbing pad 8 is fixedly connected to the inside of the ejection tube 4, a top plate 9 is arranged on the top of the shock absorbing pad 8, and a mounting plate 9 is arranged on the top of the top plate 9. The mounting base 10 is fixedly connected to a connecting panel 11 at the top of the mounting base 10. A groove is provided inside the mounting base 10. A plurality of limit rails 12 are fixedly connected to the connecting panel 11 in an annular array. Slide rods 13 are slidably connected to the interior of the plurality of limit rails 12. Push plates 14 are fixedly connected to the tops of the plurality of slide rods 13. A plurality of pressing plates 15 are arranged in an annular array on the top of the connecting panel 11. A plurality of hinged plates 16 are fixedly connected to the bottom of the plurality of pressing plates 15. The plurality of hinged plates 16 are hinged to the top of the connecting panel 11. The rear sides of the plurality of pressing plates 15 are fixedly connected to The slide rails 17, the push plates 14 are fixedly connected with support rods 18 inside, the support rods 18 penetrate the slide rails 17 and are slidably connected to the slide rails 17, the first springs 19 are arranged inside the limit rails 12, the two ends of the first springs 19 are fixedly connected to the limit rails 12 and the slide rods 13, the push blocks 20 are fixedly connected to one side of the slide rods 13, the push blocks 20 penetrate the side walls of the limit rails 12 and are slidably connected to the limit rails 12, the outer side of the connecting plate 11 is provided with a plurality of limit grooves 22, the plurality of limit grooves 22 are respectively connected to the plurality of push rods 13, and the first springs 19 are respectively connected to the limit rails 12 and the slide rods 13. The ejection tube 4 is adapted to the block 20, and a plurality of limit rods 21 are fixedly connected to the top end of the ejection tube 4 in an annular array, and the plurality of limit rods 21 correspond to the plurality of limit grooves 22 respectively. A plurality of guide grooves 23 are opened in an annular array on the outside of the mounting base 10 and the connecting enclosure 11. A plurality of guide rods 24 are fixedly connected to the ejection tube 4 in an annular array, and the plurality of guide rods 24 are respectively adapted to the plurality of guide grooves 23 and are slidably connected to the plurality of guide grooves 23. The connecting enclosure 11 is limited by the guide rods 24, so as to improve the stability of the mounting base 10 and the connecting enclosure 11.

[0022] A mounting sleeve 25 is fixedly connected to one side of the upper ball cylinder 6, and a cylinder 26 is fixedly connected inside the mounting sleeve 25. The output end of the cylinder 26 penetrates the bottom of the ejection cylinder 4 and is slidably connected to the ejection cylinder 4. The top end of the cylinder 26 penetrates the shock-absorbing pad 8 and is slidably connected to the shock-absorbing pad 8. The output end of the cylinder 26 is fixedly connected to the top plate 9, and the top plate 9 is driven to rise by the cylinder 26, and the top plate 9 pushes the mounting base 10 and the connecting enclosure 11 to rise. Two piston cylinders 49 are fixedly connected inside the guide cylinder 54, and the two piston cylinders 49 are inside Both are slidably connected with a piston plate 50, and the bottoms of the two piston plates 50 are fixedly connected with vertical rods 51, the two vertical rods 51 respectively penetrate the two piston cylinders 49 and are slidably connected with the two piston cylinders 49, the bottoms of the two vertical rods 51 are fixedly connected with bent plates 52, and the outer sides of the two vertical rods 51 are sleeved with a fourth spring 53, and the two ends of the fourth spring 53 are fixedly connected with the piston cylinder 49 and the bent plates 52 respectively, and the two bent plates 52 correspond to the two sides of the top of the connecting enclosure 11 respectively, forming a damping effect, thereby buffering the connecting enclosure 11.

[0023] A guide cylinder 54 is fixedly connected to the top of the ejection tube 4, and a baffle plate 27 is hinged on one side of the guide cylinder 54. A rotating rod 28 is fixedly connected to one side of the top of the ejection tube 4, and a rotating plate 29 is fixedly connected to one end of the rotating rod 28. A torsion spring 30 is arranged on the outside of the rotating rod 28, and the two ends of the torsion spring 30 are respectively fixedly connected to the rotating rod 28 and the ejection tube 4, and the rotating plate 29 corresponds to the baffle plate 27. The rotating rod 28 extends to one end of the inside of the ejection tube 4 and is fixedly connected to a guide gear 32. The guide gear 32 is rotatably connected to the inside of the ejection tube 4, and the rotating rod 28 is driven to rotate by the rotation of the guide gear 32, and the rotating plate 29 is driven to rotate by the rotating rod 28.

[0024] A transmission rack 33 is slidably connected to one side of the ejection tube 4, and the transmission rack 33 corresponds to the guide gear 32. A second spring 35 is fixedly connected to the bottom of the transmission rack 33, and the bottom end of the second spring 35 is fixedly connected to the inner wall of the ejection tube 4. A push rod 34 is fixedly connected to one side of the bottom of the transmission rack 33. A vertical groove 31 is opened inside the side wall of the ejection tube 4, and the push rod 34 passes through the vertical groove 31 and is slidably connected to the vertical groove 31. A connecting block 41 is fixedly connected to one side of the connecting enclosure 11, and the connecting block 41 corresponds to the push rod 34. When the connecting enclosure 11 rises, it drives the connecting block 41 to rise, and the connecting block 41 pushes the push rod 34 and the transmission rack 33 to rise.

[0025] A first electric push rod 36 is fixedly connected to the rear side of the goal box 5, and an L-shaped rod 37 is fixedly connected to the output end of the first electric push rod 36. A ball pushing plate 38 is fixedly connected to the end of the L-shaped push rod 37 away from the first electric push rod 36. A ball blocking plate 39 is fixedly connected to the bottom of the ball pushing plate 38, and an arc plate 40 is fixedly connected to the front side of the ball blocking plate 39. The arc plate 40 is horizontally slidably connected to the top of the inside of the goal box 5. The L-shaped rod 37 and the ball pushing plate 38 are driven to move by the first electric push rod 36, so that the ball pushing plate 38 pushes the tennis ball to move. A second electric push rod 42 is fixedly connected to one side of the ball pushing box 7, and the output end of the second electric push rod 42 passes through the side wall of the ball pushing box 7 and is slidably connected to the ball pushing box 7. A moving plate 43 is fixedly connected to the output end of the second electric push rod 42. Goal holes are provided at the top and bottom of the ball pushing box 7, and an elastic cloth 48 is fixedly connected to the inside of the goal hole at the top of the ball pushing box 7, so that the tennis ball pushes the elastic cloth 48 Open it to allow the tennis ball to enter the ball pushing box 7. A sliding sleeve 44 is fixedly connected to the bottom end of the upper ball cylinder 6. A baffle 45 is slidably connected inside the sliding sleeve 44. A plurality of third springs 47 are arranged inside the sliding sleeve 44. The two ends of the third spring 47 are respectively fixedly connected to the baffle 45 and the sliding sleeve 44. An inclined plate 46 is fixedly connected to the bottom of the baffle 45. The inclined plate 46 is slidably connected to the inside of the sliding sleeve 44, so that the inclined plate 46 slides inside the sliding sleeve 44, so that the tennis ball at the bottom can enter the ball pushing box 7 from the bottom goal hole. A cylinder 55 is fixedly connected to the top of the ball pushing box 7. A ball pressing plate 57 is slidably connected inside the cylinder 55. A fifth spring 56 is arranged inside the cylinder 55. The two ends of the fifth spring 56 are respectively fixedly connected to the cylinder 55 and the ball pressing plate 57. A pushing screw rod 58 is rotatably connected to one side of the upper ball cylinder 6. A motor is fixedly connected to one side of the bottom end of the upper ball cylinder 6, and the output end of the motor is fixedly connected to the pushing screw rod 58.

[0026] When this solution is in use, the control system of the electric trolley 1 is used to drive the electric trolley 1 to move, so that the electric trolley 1 drives the mechanical arm body 2 and the mounting seat 3 to move, and the control system of the mechanical arm body 2 drives the mounting seat 3 and the ejection tube 4 to move. A camera is arranged inside the mounting seat 3, and the position of the athlete is monitored by the camera vision system to determine the serving position. In addition, the mechanical arm body 2 is also equipped with a sensor for detecting the motion state of the tennis ball to ensure that the tennis ball has the correct speed and angle when it is thrown. The control system electric trolley 1 can realize precise control of the trajectory of the tennis ball throwing through precise algorithm calculations, thereby achieving the purpose of simulating a real game environment. The built-in sensor control device of the entire mechanical arm improves the efficiency and quality of tennis training as a whole, while reducing the labor intensity of the coach.

[0027] When the electric trolley 1 moves to the specified position, the cylinder 26 is started, so that the output end of the cylinder 26 pushes the top plate 9 upward, so that the top plate 9 pushes the mounting base 10 and the connecting panel 11 to rise, so that when the connecting panel 11 is pushed upward, the mounting base 10 and the connecting panel 11 push the tennis ball to bounce up, and when the connecting panel 11 is rising, the guide rod 24 limits the guide groove 23, so that the connecting panel 11 and the mounting base 10 remain stable, and when the connecting panel 11 rises to the position of the multiple limit rods 21, the multiple limit rods 21 are inserted into the multiple limit grooves 22, and the multiple push blocks 20 hit the multiple limit rods 21, and the multiple push blocks 20 drive the multiple slide bars 13 to move downward, and the multiple slide bars 13 move toward the limit rails 12 The plurality of slide bars 13 compress the plurality of first springs 19, and when the slide bar 13 is lowered, the push plate 14 and the support rod 18 are driven to lower, so that the plurality of support rods 18 pull the plurality of slide rails 17 to flip outward, and when the plurality of slide rails 17 flip outward, the plurality of pressure plates 15 and the hinge plate 16 are driven to open outward, so that the plurality of pressure plates 15 are separated from the top of the tennis ball, and the tennis ball is thrown outward under the push of the mounting base 10 and the connecting enclosure 11, so as to facilitate the athletes to hit the ball, ensure that the tennis ball remains stable during the bounce process, and the problem of the ball body shifting will not occur at an inclined angle. When the ball moves to the top position of the ejection tube 4, the plurality of pressure plates 15 are automatically opened, so that the ball flies out stably, so as to ensure that the strength and angle of the tennis ball throwing meet the predetermined parameters. After the throwing is completed, the connecting enclosure 11 and the mounting base 10 will be reset under the drive of the cylinder 26, ready for the next throwing. The accuracy and reliability of tennis throwing are improved, and an efficient and stable auxiliary tool is provided for tennis training.

[0028] When the connecting enclosure 11 moves to the bent plate 52, the connecting enclosure 11 pushes the bent plate 52 to move. When the bent plate 52 moves, it drives the vertical rod 51 and the piston plate 50 to move, so that the piston plate 50 slides inside the piston cylinder 49, so that the buffer solution flows through the multiple through holes inside the piston plate 50 to form a damping effect, and cooperates with the fourth spring 53 to be compressed, thereby buffering the connecting enclosure 11, improving the stability of the connecting enclosure 11, and at the same time decelerating the connecting enclosure 11, so that the ball flies out of the guide cylinder 54.

[0029] By moving the ball pushing box 7 to the top of the scattered tennis balls on the ground and making the ball pushing box 7 cover the surface of the balls, the ball pushing box 7 descends so that the bottom of the inclined plate 46 contacts the tennis balls. Because of the inclined design of the inclined plate 46, the balls push the inclined plate 46 to shrink toward the inside of the sliding sleeve 44, so that the balls enter the ball pushing box 7. After storing multiple tennis balls, the balls contact the pushing screw 58 along the trajectory of the upper ball cylinder 6. When the balls inside the upper ball cylinder 6 are filled in the ball pushing box 7, the balls at the bottom continue to rise and rise from the elastic cloth 48 into the cylinder 55, so that the balls are discharged into the cylinder 55. The second electric push rod 42 is started to push the moving plate 43 to move, and the pushing screw 58 is driven to rotate by the motor, so that the pushing screw 58 pushes the tennis balls to move upward inside the upper ball cylinder 6, and the balls at the top are at the top inside the upper ball cylinder 6.

[0030] After the tennis ball is thrown, the connecting plate 11 continues to rise and pushes the push rod 34 upward, thereby causing the push rod 34 to push the transmission rack 33 upward. When the transmission rack 33 moves upward, it drives the guide gear 32 to rotate, so that the guide gear 32 drives the rotating rod 28 to rotate. When the rotating rod 28 rotates, it drives the rotating plate 29 to flip over, so that the baffle plate 27 loses its limit, and then the first electric push rod 36 is started, so that when the first electric push rod 36 is started, the first electric push rod 36 drives the L-shaped rod 37 to move, and when the L-shaped rod 37 moves, it drives the ball to be pushed The plate 38 and the arc plate 40 move toward the inside of the ejection tube 4, so that the ball pushing plate 38 pushes the tennis ball at the top to push the baffle plate 27 to flip upward, and the tennis ball falls into the connecting enclosure 11 and the mounting base 10. When the mounting base 10 and the connecting enclosure 11 descend, the first spring 19 pops up and pushes the slide rod 13 to move upward, and the slide rod 13 drives the push plate 14 and the support rod 18 to move upward, and then the support rod 18 pushes the slide rail 17 and the pressure plate 15 to deflect inward, so that multiple pressure plates 15 limit the ball and improve the stability of the ball.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A tennis throwing mechanical arm for simulating a tennis throwing action, comprising an electric trolley (1), a mechanical arm body (2) being fixedly connected to the top of the electric trolley (1), and a mounting seat (3) being fixedly connected to the output end of the mechanical arm body (2), characterized in that: One side of the mounting seat (3) is fixedly connected to a launch tube (4), one side of the launch tube (4) is fixedly connected to a ball box (5), the bottom of the ball box (5) is fixedly connected to an upper ball tube (6), one side of the upper ball tube (6) is fixedly connected to a ball pushing box (7), the inside of the launch tube (4) is fixedly connected to a shock absorbing pad (8), the top of the shock absorbing pad (8) is provided with a top plate (9), the top of the top plate (9) is provided with a mounting base (10), the top of the mounting base (10) is fixedly connected to a connecting panel (11), a groove is provided inside the mounting base (10), a plurality of limiting rails (12) are fixedly connected in a circular array inside the connecting panel (11), the plurality of limiting rails (12) are slidably connected to slide rods (13), the tops of the plurality of slide rods (13) are fixedly connected to push plates (14), the connecting panel (11) is fixedly connected to a connecting panel (11), and the connecting panel (11) is fixedly connected to a connecting panel (11). 1) A plurality of pressure plates (15) are arranged in a circular array at the top, a plurality of the pressure plates (15) are fixedly connected to a hinged plate (16) at the bottom, a plurality of the hinged plates (16) are hinged to the top of the connecting enclosure (11), a plurality of the pressure plates (15) are fixedly connected to a slide rail (17) at the rear side, a plurality of the push plates (14) are fixedly connected to a support rod (18) inside, a plurality of the support rods (18) respectively penetrate the plurality of slide rails (17) and are slidably connected to the plurality of slide rails (17), a first spring (19) is arranged inside the plurality of limit rails (12), two ends of the first spring (19) are fixedly connected to the limit rail (12) and the slide rod (13), a push block (20) is fixedly connected to one side of the plurality of slide rods (13), a plurality of the push blocks (20) respectively penetrate the side walls of the plurality of limit rails (12) and are slidably connected to the plurality of limit rails (12).

2. A tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: The outer side of the connecting enclosure (11) is provided with a plurality of limit grooves (22), and the plurality of limit grooves (22) are respectively matched with the plurality of push blocks (20); the top of the ejection tube (4) is fixedly connected with a plurality of limit rods (21) in an annular array, and the plurality of limit rods (21) respectively correspond to the plurality of limit grooves (22); the outer side of the mounting base (10) and the connecting enclosure (11) is provided with a plurality of guide grooves (23) in an annular array; the ejection tube (4) is fixedly connected with a plurality of guide rods (24) in an annular array, and the plurality of guide rods (24) are respectively matched with the plurality of guide grooves (23) and are slidably connected with the plurality of guide grooves (23).

3. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: A mounting sleeve (25) is fixedly connected to one side of the upper ball cylinder (6), a cylinder (26) is fixedly connected inside the mounting sleeve (25), an output end of the cylinder (26) passes through the bottom of the ejection cylinder (4) and is slidably connected to the ejection cylinder (4), a top end of the output end of the cylinder (26) passes through a shock-absorbing pad (8) and is slidably connected to the shock-absorbing pad (8), and the output end of the cylinder (26) is fixedly connected to a top plate (9).

4. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: The top of the ejection tube (4) is fixedly connected to a guide tube (54), one side of the guide tube (54) is hingedly connected to a material blocking plate (27), one side of the top of the ejection tube (4) is fixedly connected to a rotating rod (28), one end of the rotating rod (28) is fixedly connected to a rotating plate (29), a torsion spring (30) is arranged outside the rotating rod (28), two ends of the torsion spring (30) are respectively fixedly connected to the rotating rod (28) and the ejection tube (4), the rotating plate (29) and the material blocking plate (27) correspond to each other, one end of the rotating rod (28) extending to the inside of the ejection tube (4) is fixedly connected to a guide gear (32), and the guide gear (32) is rotatably connected to the inside of the ejection tube (4).

5. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: A transmission rack (33) is slidably connected to one side of the ejection tube (4) in an up-and-down manner, and the transmission rack (33) corresponds to the guide gear (32). A second spring (35) is fixedly connected to the bottom of the transmission rack (33), and the bottom end of the second spring (35) is fixedly connected to the inner wall of the ejection tube (4). A push rod (34) is fixedly connected to one side of the bottom of the transmission rack (33). A vertical groove (31) is provided inside a side wall of the ejection tube (4), and the push rod (34) penetrates the vertical groove (31) and is slidably connected to the vertical groove (31). A connecting block (41) is fixedly connected to one side of the connecting enclosure (11), and the connecting block (41) corresponds to the push rod (34).

6. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: The rear side of the goal box (5) is fixedly connected to a first electric push rod (36); the output end of the first electric push rod (36) is fixedly connected to an L-shaped rod (37); the end of the L-shaped rod (37) away from the first electric push rod (36) is fixedly connected to a ball pushing plate (38); the bottom of the ball pushing plate (38) is fixedly connected to a ball blocking plate (39); the front side of the ball blocking plate (39) is fixedly connected to an arc plate (40); and the arc plate (40) is horizontally slidably connected to the top of the interior of the goal box (5).

7. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: A second electric push rod (42) is fixedly connected to one side of the ball pushing box (7); an output end of the second electric push rod (42) passes through the side wall of the ball pushing box (7) and is slidably connected to the ball pushing box (7); a movable plate (43) is fixedly connected to the output end of the second electric push rod (42); goal holes are provided at the top and bottom of the ball pushing box (7); and an elastic cloth (48) is fixedly connected to the inside of the goal hole at the top of the ball pushing box (7).

8. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: The bottom end of the upper ball cylinder (6) is fixedly connected to a sliding sleeve (44), a baffle (45) is slidably connected inside the sliding sleeve (44), a plurality of third springs (47) are arranged inside the sliding sleeve (44), two ends of the third springs (47) are respectively fixedly connected to the baffle (45) and the sliding sleeve (44), a slanted plate (46) is fixedly connected to the bottom of the baffle (45), and the slanted plate (46) is slidably connected to the inside of the sliding sleeve (44).

9. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 4, characterized in that: Two piston cylinders (49) are fixedly connected inside the guide cylinder (54), and piston plates (50) are slidably connected inside the two piston cylinders (49). Vertical rods (51) are fixedly connected to the bottom of the two piston plates (50). The two vertical rods (51) respectively penetrate the two piston cylinders (49) and are slidably connected to the two piston cylinders (49). The bottom ends of the two vertical rods (51) are fixedly connected to bent plates (52). The outer sides of the two vertical rods (51) are sleeved with fourth springs (53), and the two ends of the fourth spring (53) are fixedly connected to the piston cylinders (49) and the bent plates (52) respectively. The two bent plates (52) correspond to the two sides of the top of the connecting enclosure (11).

10. The tennis throwing mechanical arm for simulating tennis throwing action according to claim 1, characterized in that: A cylinder (55) is fixedly connected to the top of the ball pushing box (7), a ball pressing plate (57) is slidably connected to the inside of the cylinder (55), a fifth spring (56) is arranged inside the cylinder (55), two ends of the fifth spring (56) are respectively fixedly connected to the cylinder (55) and the ball pressing plate (57), a pushing screw rod (58) is rotatably connected to one side of the inside of the upper ball cylinder (6), a motor is fixedly connected to one side of the bottom end of the inside of the upper ball cylinder (6), and an output end of the motor is fixedly connected to the pushing screw rod (58).

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