Tennis training device

Abstract

The invention discloses a tennis training device which comprises a moving vehicle, one side of the moving vehicle is fixedly connected with a ball dispenser, the other side of the moving vehicle is fixedly connected with a supporting plate, the upper side of the supporting plate is fixedly connected with a support, the support is fixedly connected with a servo motor, and the upper side of the supporting plate is rotationally connected with a cylinder. A transmission device is arranged between the cylinder and the servo motor, and a tennis racket is arranged at the upper end of the cylinder; the upper end of the cylinder is fixedly connected with a transverse pipe, a round rod is rotatably connected in the transverse pipe, one end of the round rod is fixedly connected with the tennis racket, and the other end of the round rod is provided with a driving device. The tennis racket is quickly waved to beat the tennis ball at a low speed, so that the rebound distance of the tennis ball is reduced, false actions in tennis sports are simulated, and the training response speed is increased.

Description

Technical Field

[0001] This invention relates to the field of tennis training equipment technology, and more particularly to a tennis training device. Background Technology

[0002] Tennis is a game typically played between two singles players and two doubles pairs. Players use rackets to hit a rubber ball and make it land in the opponent's court. Tennis is usually played by two or more people; it cannot be played alone.

[0003] To meet the needs of individual training, existing technologies have developed devices for throwing tennis balls to practice hitting. These devices can only perform a single tennis ball throwing action, and users can easily predict the direction in which the tennis ball will fly. As a result, the difficulty is low and the effect on improving the trainee's ability is low. Therefore, there is a need for a training device in which the trajectory of the thrown tennis ball can vary. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tennis training device, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A tennis training device includes a mobile cart, a ball-serving device fixedly connected to one side of the mobile cart, a support plate fixedly connected to the other side of the mobile cart, a bracket fixedly connected to the upper side of the support plate, a servo motor fixedly connected to the bracket, a cylinder rotatably connected to the upper side of the support plate, a transmission device provided between the cylinder and the servo motor, and a tennis racket provided at the upper end of the cylinder. The upper end of the cylinder is fixedly connected to a horizontal tube, and a round rod is rotatably connected inside the horizontal tube. One end of the round rod is fixedly connected to a tennis racket, and the other end of the round rod is equipped with a driving device.

[0006] Preferably, the driving device includes a rotating ring rotatably connected to the upper side of a support plate, the rotating ring being coaxial with a cylinder, an inclined block fixedly connected to the upper side of the rotating ring, a box body fixedly connected to one end of a horizontal tube, a round rod extending into the box body and fixedly connected to a first gear, a vertical rod slidably connected to the bottom of the box body, the vertical rod meshing with the first gear, a first spring fixedly connected between the upper end of the vertical rod and the inner wall of the box body, and the lower end of the vertical rod corresponding to the inclined block; The rotating ring is driven to rotate intermittently by a driver.

[0007] Preferably, the cylinder includes a bottom shaft and a lifting shaft. The bottom shaft is rotatably connected to the support plate and does not shift axially. A square rod is fixedly connected to the upper end of the bottom shaft. The lifting shaft is slidably connected to the square rod and can shift axially. A support spring is fixedly connected between the bottom shaft and the lifting shaft. The tennis racket is mounted on the lifting shaft.

[0008] Preferably, the driver includes a turntable wheel, which is fixedly connected to the main shaft of the servo motor. A push rod is slidably connected to the upper side of the support plate, and a reversing gear is rotatably connected to the upper side of the support plate. The push rod meshes with the reversing gear, and the reversing gear meshes with the turntable wheel. A ratchet is provided on the outer circle of the rotating ring. The push rod is rotatably connected to a pawl in one direction, and the pawl's rotating shaft is provided with a torsion spring. A stop pawl is provided on the upper side of the support plate.

[0009] Preferably, a roller is rotatably connected to the lower end of the vertical rod.

[0010] Preferably, the transmission device is a gear drive, belt drive, or sprocket drive.

[0011] The advantages of this invention are: the tennis training device provided by this invention reduces the distance of the tennis ball's rebound by quickly swinging the tennis racket and then hitting the tennis ball with a low speed, thereby mimicking the feints in tennis and improving training reaction speed.

[0012] This invention achieves a simple and convenient ball-flicking motion by first compressing the first spring upwards during a simulated feint shot. Once the first spring is no longer compressed, the support spring is stretched, raising the lifting shaft and the tennis racket together. The coordination of the servo motor speed allows for training in various tennis ball variations, offering advantages that existing single-serve devices cannot match. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the basic structure of the present invention; Figure 2 yes Figure 1 Enlarged view of section E in the image; Figure 3 This is a schematic diagram of the structure of the driving device of the present invention; Figure 4 yes Figure 3 Enlarged view of section F in the image; Figure 5 This is a top view of the driver of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0015] like Figures 1 to 5As shown, the tennis training device provided by the present invention includes a mobile cart 1. A ball server 11 is fixedly connected to one side of the mobile cart 1. The ball server 11 adopts a conventional device with directional automatic ball throwing. A support plate 12 is fixedly connected to the other side of the mobile cart 1. A bracket 13 is fixedly connected to the upper side of the support plate 12. A servo motor 14 is fixedly connected to the bracket 13. A cylinder 2 is rotatably connected to the upper side of the support plate 12. A transmission device 3 is provided between the cylinder 2 and the servo motor 14. The transmission device 3 is a gear transmission, belt transmission or sprocket transmission. A tennis racket 4 is provided at the upper end of the cylinder 2. A horizontal tube 41 is fixedly connected to the upper end of the cylinder 2. A round rod 42 is rotatably connected inside the horizontal tube 41. One end of the round rod 42 is fixedly connected to the tennis racket 4, and a driving device 5 is provided at the other end of the round rod 42.

[0016] The ball launcher 11 throws the tennis ball. If the drive device 5 uses conventional power, such as a motor drive, the following actions are achieved in conjunction with the controller and the edited control program: Action 1: The tennis ball is hit at a constant speed. Action 2: The servo motor 14 drives the cylinder 2 to rotate at different speeds, for example, at speeds a and b, where speed a is greater than speed b. Assuming the rotation time is 10 seconds, the cylinder rotates at speed a for 8 seconds and then at speed b for 2 seconds. After quickly swinging the tennis racket 4, the ball is hit at a low speed, which reduces the distance the tennis ball bounces. This is used to imitate the feints in tennis. The ball is switched between Action 1 and Action 2 to improve training reaction speed. Example 2

[0017] like Figures 1 to 5 As shown, unlike Embodiment 1, this invention discloses a driving device 5. The driving device 5 includes a rotating ring 51, which is rotatably connected to the upper side of the support plate 12. The rotating ring 51 is coaxial with the cylinder 2. An inclined block 52 is fixedly connected to the upper side of the rotating ring 51. One end of the horizontal tube 41 is fixedly connected to the box body 53. A round rod 42 extends into the box body 53 and is fixedly connected to the first gear 54. A vertical rod 55 is vertically slidably connected to the bottom of the box body 53. The vertical rod 55 meshes with the first gear 54. A first spring 56 is fixedly connected between the upper end of the vertical rod 55 and the inner wall of the box body 53. The lower end of the vertical rod 55 is correspondingly set to the inclined block 52. The lower end of the vertical rod 55 is rotatably connected to a roller 551. The roller 551 rolls to the inclined surface of the inclined block 52, causing the vertical rod 55 to rise. The rise of the vertical rod 55 drives the round rod 42 to rotate through the first gear 54, thereby reducing the tilt amplitude of the tilted tennis racket 4, thus better conforming to the actual hitting action of tennis. The rotating ring 51 is driven to rotate intermittently by the driver 6.

[0018] Specifically, the cylinder 2 includes a bottom shaft 21 and a lifting shaft 22. The bottom shaft 21 is rotatably connected to the support plate 12 and does not shift axially. The upper end of the bottom shaft 21 is fixedly connected to a square rod 23. The lifting shaft 22 is slidably connected to the square rod 23 and can shift axially. A support spring 24 is fixedly connected between the bottom shaft 21 and the lifting shaft 22. The tennis racket 4 is mounted on the lifting shaft 22. The yield force of the support spring 24 is greater than that of the first spring 56. That is, the vertical rod 55 first compresses the first spring 56 upward. After the first spring 56 can no longer be compressed, the support spring 24 is stretched, and the lifting shaft 22 and the tennis racket 4 are raised together.

[0019] Specifically, the driver 6 includes a turntable 61, which is fixedly connected to the main shaft of the servo motor 14. A push rod 62 is slidably connected to the upper side of the support plate 12, and a reversing gear 63 is rotatably connected to the upper side of the support plate 12. The push rod 62 meshes with the reversing gear 63, and the reversing gear 63 meshes with the turntable 61. A ratchet 64 is provided on the outer circle of the rotating ring 51. The push rod 62 is rotatably connected to a pawl 65, and the rotating shaft of the pawl 65 is provided with a torsion spring. A stop pawl 66 is provided on the upper side of the support plate 12. The push rod 62 slides horizontally and achieves unidirectional rotation through the ratchet 64-pawl 65 structure. The principle of the ratchet 64-pawl 65 is existing technology and will not be described in detail here.

[0020] Using the drive device 5 of this embodiment, the servo motor 14 drives the cylinder 2 and tennis racket 4 to rotate and then reset through the transmission device 3, and hits the thrown tennis ball, thereby forming a competitive training exercise. During several of the above actions, the actuating wheel 61 on the main shaft of the servo motor 14 pushes the push rod 62 to slide back and forth via the reversing gear 63. The push rod 62 pushes the rotating ring 51 to rotate in one direction, as... Figure 3 As shown, cylinder 2 rotates counterclockwise, and push rod 62 pushes ring 51 to rotate clockwise intermittently. This will cause the inclined block 52 to move relative to the vertical rod 55. After swinging the tennis racket 4 at a constant speed multiple times, the second action is used to make a feint. When decelerating, the roller 551 at the lower end of the vertical rod 55 rolls to the inclined surface of the inclined block 52, causing the vertical rod 55 to rise. The rise of the vertical rod 55 pushes the round rod 42 to rotate through the first gear 54, reducing the tilt of the tilted tennis racket 4. This, combined with the reduction in hitting force, changes the direction of the shot. Furthermore, the reduced speed leads to a decrease in hitting power and a shorter hitting distance, resulting in a "short ball" that is more likely to not cross the line (the highest point of the parabola of the ball's trajectory is lowered, affecting the ball's ability to cross the court boundary). To address this, in actual doubles matches, the racket needs to be raised (using a lob technique) to ensure the ball safely crosses the line, making the training device's reaction training more closely resemble actual sports conditions.

[0021] To achieve the above-mentioned ball-flipping technique, the vertical rod 55 first compresses the first spring 56 upwards. After the first spring 56 stops compressing, the support spring 24 is stretched, and the lifting shaft 22 and the tennis racket 4 are raised together. This simple and convenient method of ball-flipping is easy to coordinate with different speeds of the servo motor 14, enabling training in various tennis ball variations. It has advantages that existing single-serving devices cannot match.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tennis training device, comprising a mobile cart (1), a ball-serving device (11) fixedly connected to one side of the mobile cart (1), a support plate (12) fixedly connected to the other side of the mobile cart (1), a bracket (13) fixedly connected to the upper side of the support plate (12), a servo motor (14) fixedly connected to the bracket (13), a cylinder (2) rotatably connected to the upper side of the support plate (12), a transmission device (3) provided between the cylinder (2) and the servo motor (14), and a tennis racket (4) provided at the upper end of the cylinder (2), characterized in that: The upper end of the cylinder (2) is fixedly connected to the horizontal tube (41), and the horizontal tube (41) is rotatably connected to the round rod (42). One end of the round rod (42) is fixedly connected to the tennis racket (4), and the other end of the round rod (42) is provided with a driving device (5).

2. The tennis training device according to claim 1, characterized in that: The driving device (5) includes a rotating ring (51), which is rotatably connected to the upper side of the support plate (12). The rotating ring (51) is coaxial with the cylinder (2). An inclined block (52) is fixedly connected to the upper side of the rotating ring (51). One end of the horizontal tube (41) is fixedly connected to the box body (53). The round rod (42) extends into the box body (53) and is fixedly connected to the first gear (54). The bottom of the box body (53) is vertically slidably connected to a vertical rod (55). The vertical rod (55) meshes with the first gear (54). The upper end of the vertical rod (55) is fixedly connected to the inner wall of the box body (53) with a first spring (56). The lower end of the vertical rod (55) is correspondingly set with the inclined block (52). The rotating ring (51) is driven to rotate intermittently by a driver (6).

3. The tennis training device according to claim 2, characterized in that: The cylinder (2) includes a bottom shaft (21) and a lifting shaft (22). The bottom shaft (21) is rotatably connected to the support plate (12) and does not shift axially. A square rod (23) is fixedly connected to the upper end of the bottom shaft (21). The lifting shaft (22) is slidably connected to the square rod (23) and can shift axially. A support spring (24) is fixedly connected between the bottom shaft (21) and the lifting shaft (22). The tennis racket (4) is mounted on the lifting shaft (22).

4. A tennis training device according to claim 2, characterized in that: The driver (6) includes a turntable (61), which is fixedly connected to the main shaft of the servo motor (14). A push rod (62) is slidably connected to the upper side of the support plate (12). A reversing gear (63) is rotatably connected to the upper side of the support plate (12). The push rod (62) meshes with the reversing gear (63), and the reversing gear (63) meshes with the turntable (61). A ratchet (64) is provided on the outer circle of the rotating ring (51). The push rod (62) is rotatably connected to a pawl (65) in one direction, and a rotary torsion spring is provided on the rotating shaft of the pawl (65). A stop pawl (66) is provided on the upper side of the support plate (12).

5. A tennis training device according to claim 2, characterized in that: The lower end of the vertical rod (55) is rotatably connected to a roller (551).

6. A tennis training device according to claim 1, characterized in that: The transmission device (3) is a gear drive, belt drive or sprocket drive.

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