Table tennis serving device for teaching

Abstract

The utility model provides a table tennis ball serving device for teaching, which relates to the technical field of table tennis ball serving devices and comprises a moving seat, a ball serving pipe on one side of the moving seat, a plastic hard rubber pipe and a ball serving head. A connecting pipe is connected between the plastic hard rubber pipe and the ball serving head, the ball serving head can rotate relative to the connecting pipe by arranging the connecting pipe, then the inclination angle of the ejected table tennis ball of the upper spin ball or the lower spin ball can be adjusted, in addition, when the connecting rack frame swings, the rotating gear and the connecting pipe can be driven to move along an arc, and therefore the table tennis ball serving head can be adjusted. And the connecting pipe and the inserting strip are driven to slide left and right on the surface of the socket to adjust the position, so that the serving direction of the serving head is adjusted, the table tennis serving angle and direction can be changed, and the response ability of training personnel is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of table tennis ball serving technology, and in particular to a table tennis ball serving device for teaching purposes. Background Technology

[0002] Table tennis ball serving machines are essential recreational and training tools for many table tennis halls and families. Automatic table tennis ball serving machines are suitable for use in communities, schools, homes, and professional training venues, providing a stable training environment and training techniques and footwork.

[0003] Therefore, an existing table tennis teaching and practice auxiliary device, with publication number CN219614859U, involves placing multiple table tennis balls into the ball-feeding chamber. During operation, the balls fall into the ball grooves on the ball-feeding wheels, which slowly rotate to feed the balls. The balls are then fed into the serving tube and sleeve, accumulating to achieve automatic ball feeding. A serving motor drives the serving wheels to rotate, and the friction between the two wheels gives the table tennis balls an initial velocity, achieving the purpose of serving. The direction and angle can be adjusted via a malleable rigid rubber tube, and the serving height can be adjusted by loosening the positioning knob and adjusting the sleeve height. By adjusting the speed difference between the two serving wheels, topspin and backspin balls can be served, improving the quality of teaching and training.

[0004] However, adjusting the malleable rigid rubber tube requires manual adjustment, which has certain drawbacks. First, at least one person is needed to assist, or the trainee needs to adjust it themselves, which affects the trainee's training. Second, the malleable rigid rubber tube can only achieve a single direction and a single type of serve during training, so it cannot simulate the trainee's reaction to different serve methods from the opponent in actual competition. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a teaching table tennis ball serving device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a teaching table tennis serving device, comprising a movable base, a serving tube, a malleable rigid rubber tube, and a serving head on one side of the movable base, a fixed base fixedly connected to the outer wall of the serving tube near the ball outlet, a connecting tube connecting the malleable rigid rubber tube and the serving head, a rotating gear rotatably connected to the outer wall of the connecting tube and a fixed insert connected thereto, a socket penetrating the fixed base inserted into one side of the insert, a spring rod fixedly connected between the fixed base and the socket, a motor fixedly connected to the upper surface of the fixed base, and a connecting rack frame sleeved on the rotating gear on the motor spindle fixedly connected to the fixed base, the tooth groove of the connecting rack frame being disposed on one inner wall of the connecting rack frame and meshing with the rotating gear.

[0007] Preferably, one end of the connecting tube is fixed to the port of a malleable rigid rubber tube, and the other end is rotatably connected to the ball-serving head's inlet.

[0008] Preferably, a motor is also fixedly connected to the outer wall of the connecting pipe, and a toothed ring is fixedly connected to the outer wall of the serving head near one end of the connecting pipe. A spur gear that meshes with the toothed ring is fixedly connected to the motor spindle on the connecting pipe.

[0009] Preferably, a gearbox is fixedly connected to the fixed base, and three U-shaped bevel gears are provided. The three bevel gears are respectively fixed through the motor main shaft on the fixed base, rotatably connected to the fixed base, and fixedly connected to the input shaft of the gearbox. The output shaft of the gearbox and the end face of the rotating gear are both fixedly connected to pulleys. A movable pulley of the same height as the pulley is elastically inserted into the side of the connecting rack frame, and a belt strip passing through the movable pulley is provided between the two pulleys.

[0010] Preferably, the center line of the transmission coincides with that of the motor on the fixed base, and the pulley on the transmission is rotatably connected to the upper surface of the connecting rack frame. Among the three U-shaped bevel gears, two adjacent bevel gears are meshed together.

[0011] Preferably, the movable pulley housing has a plurality of columnar protrusions integrally formed on the side of the rack frame, and a spring rod is also fixedly connected between the movable pulley and the side of the rack frame.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by setting a connecting tube, the serving head can rotate relative to the connecting tube, thereby adjusting the tilt angle of the topspin or backspin ping-pong ball. In addition, when the connecting rack frame swings, it will drive the rotating gear and the connecting tube to move along the arc, and drive the connecting tube and the plug to slide left and right on the socket surface to adjust their positions, thereby adjusting the serving direction of the serving head. This can change the angle and direction of the ping-pong ball serving, making it easier to train the reaction ability of the trainer.

[0014] 2. In this utility model, the speed change action of the gearbox enables the rotating gear to rotate accordingly when the connecting rack frame swings, so that the rotating gear moves within the connecting rack frame, thereby actively adjusting the horizontal distance between the connecting tube and the fixed seat. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural diagram of a teaching table tennis ball serving device;

[0016] Figure 2 This utility model provides a structural schematic diagram of a fixing seat for a teaching table tennis ball serving device;

[0017] Figure 3 This utility model proposes a teaching table tennis ball serving device. Figure 2 A schematic diagram of the cross-sectional structure;

[0018] Figure 4 for Figure 2 The front view.

[0019] Legend: 1. Moving seat; 2. Serve tube; 3. Molded rigid rubber tube; 4. Serve head; 5. Fixed seat; 6. Socket; 7. Spring rod; 8. Connecting tube; 9. Connecting rack frame; 10. Belt strip; 11. Moving pulley; 12. Gearbox; 13. Pulley; 14. Rotating gear; 15. Insert strip; 16. Motor; 17. Bevel gear; 18. Spur gear; 19. Gear ring. Detailed Implementation

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figure 1-4 As shown, a teaching table tennis serving device includes a movable seat 1, a serving tube 2 on one side of the movable seat 1, a malleable hard rubber tube 3, and a serving head 4. The specific structure of the movable seat 1, the serving tube 2, and the serving head 4 refers to a table tennis teaching and practice auxiliary device disclosed in CN219614859U. Referring to the structure in that patent, the table tennis ball passes through the movable seat 1, the serving tube 2, the malleable hard rubber tube 3, and the serving head 4, and is then ejected with a certain initial velocity.

[0023] A fixed base 5 is fixedly connected to the outer wall of the serving tube 2 near the ball outlet. A connecting tube 8 connects the malleable rigid rubber tube 3 and the serving head 4. One end of the connecting tube 8 is fixed to the port of the malleable rigid rubber tube 3, and the other end is rotatably connected to the ball outlet of the serving head 4, ensuring that the serving head 4 can rotate relative to the connecting tube 8, thereby adjusting the tilt angle of the topspin or backspin ping-pong ball. A rotating gear 14 is rotatably connected to the outer wall of the connecting tube 8, and an insert 15 is fixedly connected to it. A socket 6 that passes through the fixed base 5 is inserted into one side of the insert 15. By using the insertion of the socket 6 and the fixed base 5, it is ensured that the connecting tube 8 and the ball outlet of the serving tube 2 can only move relative to each other while maintaining the same height. A spring rod 7 is fixedly connected between the fixed base 5 and the socket 6. The spring rod 7 between the two can be forced to elastically contract when the socket 6 moves towards the fixed base 5. Thus, after losing the force on the connecting tube 8, the socket 6 can drive the connecting tube 8 to return to its original position. An electric current device is fixedly connected to the upper surface of the fixed base 5. The motor 16 on the fixed base 5 is fixedly connected to the main shaft of the motor 16 and the connecting rack frame 9 sleeved on the rotating gear 14. The motor 16 on the fixed base 5 drives the connecting rack frame 9 to rotate and swing. Because the rotating gear 14 is located inside the connecting rack frame 9 and is rotatably connected to the outer wall of the connecting tube 8, and the tooth groove of the connecting rack frame 9 is set on the inner wall of one side of the connecting rack frame 9 and meshes with the rotating gear 14, when the connecting rack frame 9 swings, it will drive the rotating gear 14 and the connecting tube 8 to move along an arc, and drive the connecting tube 8 and the insert 15 to slide left and right on the surface of the socket 6 to adjust their positions. However, because the insert 15 is inserted into the socket 6 and the socket 6 passes through the fixed base 5, the connecting tube 8 and the ball outlet end face of the ball head 4 are kept at the same height. When the connecting tube 8 moves in an arc, it generates pressure on the connecting tube 8 in the direction of the fixed base 5, which shortens the distance between the fixed base 5 and the connecting tube 8. Therefore, the rotating gear 14 will slide inside the connecting rack frame 9.

[0024] To further elaborate, in order to drive the serving head 4 to rotate and achieve the serving of tilted topspin or backspin balls: a motor 16 is also fixedly connected to the outer wall of the connecting tube 8, and a gear ring 19 is fixedly connected to the outer wall of the serving head 4 near the end of the connecting tube 8. The main shaft of the motor 16 on the connecting tube 8 is fixedly connected to a spur gear 18 that meshes with the gear ring 19. Specifically, the motor 16 on the connecting tube 8 drives the spur gear 18 to rotate, thereby achieving the meshing of the gear ring 19 and driving the serving head 4 to rotate.

[0025] To further elaborate, in order to enable the socket 6 to move smoothly relative to the fixed base 5: a gearbox 12 is fixedly connected to the fixed base 5, and three U-shaped bevel gears 17 are provided. The three bevel gears 17 are respectively fixed through the main shaft of the motor 16 on the fixed base 5, rotatably connected to the fixed base 5, and fixedly connected to the input shaft of the gearbox 12. Among the three U-shaped bevel gears 17, adjacent bevel gears 17 mesh with each other. The output shaft of the gearbox 12 and the end face of the rotating gear 14 are both fixedly connected to pulleys 13. The gearbox 12 and the motor on the fixed base 5... The center lines of 16 coincide, and the pulley 13 on the gearbox 12 is rotatably connected to the upper surface of the connecting rack frame 9. Therefore, when the main shaft of the motor 16 on the fixed base 5 rotates, it drives the bevel gear 17 on its surface to rotate, thereby realizing that the bevel gear 17 in the middle position drives the bevel gear 17 on the input shaft of the gearbox 12 to rotate, thus realizing the rotation of the input shaft of the gearbox 12. After the speed regulation action of the gearbox 12, the pulley 13 on the output shaft of the gearbox 12 rotates. A movable pulley 11 of the same height as the pulley 13 is elastically inserted into the side of the connecting rack frame 9. A belt 10 is provided between the pulleys 13, passing through the movable pulley 11. The movable pulley 11 has several columnar protrusions integrally formed on its housing, penetrating and connecting the side of the rack frame 9. A spring rod 7 is also fixedly connected between the movable pulley 11 and the side of the rack frame 9. Utilizing the transmission action of the belt 10, the pulley 13 at the fixed seat 5 drives the pulley 13 on the rotating gear 14 to rotate. Under the elastic support of the spring rod 7 on the rack frame 9, the movable pulley 11 is pushed against the inner wall of the belt 10, thus keeping the belt 10 taut. Furthermore, when the rack frame 9 swings to change the distance between the rotating gear 14 and the fixed seat 5, the elastic extension and contraction of the spring rod 7 on the rack frame 9 is utilized. The belt 10 presses against the spring rod 7 and contracts elastically, or the spring rod 7 continues to extend elastically, ensuring that the belt 10 is always in a taut state. Then, through the speed change action of the gearbox 12, the swinging of the rack frame 9 drives the rotating gear 14 to rotate accordingly, so that the rotating gear 14 moves within the rack frame 9, that is, actively adjusts the horizontal distance between the connecting tube 8 and the fixed seat 5.

[0026] Working principle: When the ping-pong ball is ejected through the moving seat 1, the serving tube 2, the malleable rigid rubber tube 3, and the serving head 4, the motor 16 on the fixed seat 5 drives the connecting rack frame 9 to rotate and swing. By connecting the connecting rack frame 9 and the rotating gear 14, the distance between the connecting tube 8 and the serving tube 2 can be adjusted. At the same time, the connecting tube 8 is driven to slide left and right along the surface of the socket 6, which can adjust the angle of the ping-pong ball emitted by the serving head 4. Moreover, the motor 16 on the connecting tube 8 drives the spur gear 18 to rotate, which in turn drives the meshing gear ring 19 to rotate the serving head 4, thereby adjusting the tilt angle of the ejected topspin or backspin ping-pong ball.

[0027] The wiring diagrams of the serving head 4, the movable seat 1, the gearbox 12, and the motor 16 in this utility model are common knowledge in the field. Their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control method and wiring arrangement of the serving head 4, the movable seat 1, the gearbox 12, and the motor 16 will not be explained in detail.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A table tennis serving device for teaching, comprising a movable seat (1), a serving tube (2) on one side of the movable seat (1), a plastic hard rubber tube (3) and a serving head (4), characterized in that: A fixed seat (5) is fixedly connected to the outer wall of the serving tube (2) near the ball outlet, a connecting tube (8) is connected between the plastic hard rubber tube (3) and the serving head (4), the outer wall of the connecting tube (8) is rotatably connected to a rotating gear (14) and a plug strip (15) is fixedly connected, one side of the plug strip (15) is plugged with a socket (6) penetrating the fixed seat (5), a spring rod (7) is fixedly connected between the fixed seat (5) and the socket (6), the upper surface of the fixed seat (5) is fixedly connected to a motor (16), and the main shaft of the motor (16) on the fixed seat (5) is fixedly connected to a connecting rack frame (9) sleeved on the rotating gear (14), the tooth groove of the connecting rack frame (9) is arranged on the inner wall of one side of the connecting rack frame (9), and is meshed with the rotating gear (14).

2. The table tennis serving device for teaching according to claim 1, characterized in that: One end of the connecting tube (8) is fixed to the end of the plastic hard rubber tube (3), and the other end is rotatably connected to the ball opening of the serving head (4).

3. The table tennis serving device for teaching according to claim 2, characterized in that: The outer wall of the connecting tube (8) is also fixedly connected to a motor (16); the outer wall of the serving head (4) close to one end of the connecting tube (8) is fixedly connected to a gear ring (19); the main shaft of the motor (16) on the connecting tube (8) is fixedly connected to a spur gear (18) meshing with the gear ring (19).

4. The table tennis serving device for teaching according to claim 1, characterized in that: The fixed seat (5) is fixedly connected with a transmission (12) and is provided with three U-shaped bevel gears (17). The three bevel gears (17) are respectively fixedly connected to the main shaft of the motor (16) on the fixed seat (5), are rotationally connected to the fixed seat (5), and are fixedly connected to the input shaft of the transmission (12). The output shaft of the transmission (12) and the end surface of the rotating gear (14) are both fixedly connected with a pulley (13). A movable pulley (11) having the same height as the pulley (13) is elastically inserted on the side of the connecting rack frame (9), and a belt strip (10) passing through the movable pulley (11) is provided between the two pulleys (13).

5. The teaching table tennis serving device according to claim 4, characterized in that: The transmission (12) coincides with the center line of the motor (16) on the fixed seat (5), and the pulley (13) on the transmission (12) is rotationally connected to the upper surface of the connecting rack frame (9), and two adjacent bevel gears (17) among the three U-shaped bevel gears (17) are meshed and connected.

6. The table tennis serving device for teaching according to claim 4, characterized in that: The movable pulley (11) housing is integrally formed with a plurality of columnar protrusions penetrating the side of the connecting rack frame (9), and a spring rod (7) is also fixedly connected between the movable pulley (11) and the side of the connecting rack frame (9).

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