Table tennis ball serving machine head rotating device
By using a combination of rotary motor, transmission gear, rotary worm, worm wheel and slip ring in the table tennis ball serving machine, the problems of complex structure and limited angle of the machine head rotation mechanism are solved, realizing 360° rotation and accurate ball serving, and improving training effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI DOUBLE SNAKE SPORTS EQUIP TECH CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-08-04
AI Technical Summary
The existing table tennis ball serving device has a complex machine head rotation mechanism with limited rotation angle, resulting in inaccurate simulation of the serving angle and trajectory, which affects the training effect.
The ball machine head can be rotated 360° by using a combination of a rotary electric motor, transmission gears, a rotary worm, a worm wheel, and a disc slip ring. The speed of the friction wheel is controlled by the electrical signal transmitted through the slip ring. In conjunction with the horizontal and vertical swing mechanisms, precise adjustment of multiple angles and trajectories can be achieved.
It achieves stable 360° rotation of the ball-serving machine head, shortens the ball-serving interval, and improves the simulation accuracy and efficiency of training.
Smart Images
Figure CN224585308U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of table tennis serving equipment manufacturing technology, specifically a table tennis serving machine head rotation device with reasonable structure, stable rotation, and fast action response. Background Technology
[0002] Currently, most table tennis serving devices on the market consist of a housing with a conveyor channel. One end of the housing has a head structure, and the other end has a ball inlet connected to the conveyor channel. A ball feeding device feeds the ball into the head, which is equipped with a throwing device to launch the ball. To mimic human actions in launching, spinning, and straight serves, and to accurately simulate various technical factors such as the launch speed, spin, and trajectory of the table tennis ball launched by the machine head, thereby effectively improving training results, existing table tennis serving devices also include a lateral swing mechanism for driving the machine head's lateral swing, a longitudinal swing mechanism for driving the machine head's pitch swing, and a head rotation mechanism for driving the machine head's rotation. Clearly, only by precisely combining the lateral swing, pitch, and spin movements can the simulation of various ball trajectories or ball characteristics be achieved. Existing horizontal or vertical swing mechanisms are complex and inconvenient to disassemble and assemble. Most existing head rotation mechanisms rotate within a limited angle or along a limited trajectory. This results in poor coordination between the head deflection time and the horizontal or vertical swing action after the serve angle and trajectory are set, which is not conducive to simulating various serve characteristics. Summary of the Invention
[0003] This invention addresses the limitation of existing ball-serving devices in mimicking human actions to launch multiple balls, such as projectile serves, spin serves, and straight throws. It proposes a head rotation device for a table tennis ball-serving machine that features a reasonable structure, stable rotation, and fast response.
[0004] This utility model achieves its purpose through the following measures: A table tennis ball serving machine head rotating device is provided, comprising a ball serving machine head and a head rotating mechanism. The ball serving machine head is provided with a ball lane outlet pipe (1), and a ball lane outlet pipe (1) is provided with a projectile assembly for throwing the ball. The head rotating mechanism is connected to the rear end of the ball lane outlet pipe (1) via a rotating swivel sleeve (2). The head rotating mechanism is characterized in that it is provided with a rotary motor (3), a transmission gear, a rotary worm (4), a worm wheel (5), and a slip ring (6). The rotary motor (3) is fixed on the rotating swivel sleeve (2) via a motor support and drives the rotary worm (4) to rotate via the transmission gear. The worm wheel (5) is installed on the ball lane outlet pipe (1) and cooperates with the rotary worm (4). The slip ring (6) is disposed between the ball serving machine head and the rotating swivel sleeve (2).
[0005] The slip ring (6) of this utility model is a disc slip ring, including a stator, a rotor and a spring. One end of the spring is connected to the stator and the other end of the spring is in contact with the rotor. The stator and the rotor are respectively provided with mounting holes so that the disc slip ring can be installed on the ball machine head support frame (7) and the rotating live joint sleeve (2) respectively. The rotor is welded with wires and further provided with a rotation signal processing circuit (8) connected to the wires of the slip ring (6). The stator and the rotor are electrically connected through the contact of the spring. The rotation signal processing circuit (8) is connected to the projectile drive component in the projectile assembly. By setting the slip ring (6), the ball machine head can receive the electrical signal output by the main unit at the rear end of the ball machine head when rotating 360°.
[0006] In this utility model, the rotating swivel sleeve (2) has a tubular sleeve body. The front end of the rotating swivel sleeve is sleeved on the ball outlet pipe (1) of the ball machine head. The inner wall of the rotating swivel sleeve and the outer wall of the ball outlet pipe are provided with a matching annular fitting groove and annular fitting boss. Furthermore, a ball is provided in the annular fitting groove so that the ball outlet pipe and the tubular sleeve of the rotating swivel sleeve are coaxially sleeved to form a bearing-like structure, and the two can rotate relative to each other. Furthermore, in order to save the space occupied by the components, the outer wall of the rotating swivel sleeve is provided with an installation space for accommodating the rotating worm (4). Furthermore, the rear end of the rotating swivel sleeve (2) is connected to the longitudinal swing mechanism.
[0007] This utility model is provided with a control motherboard (12), a small gear (9) is led out from the rotating worm (4), the small gear (9) is connected to the gearbox (10), and the angle of the worm wheel rotation is converted into a digital signal through the transmission ratio conversion of the gearbox (10) and sent to the control motherboard (12). The control motherboard (12) is also connected to the rotation signal processing circuit (8) and the rotating motor (3) respectively.
[0008] The projectile assembly of this utility model is provided with a friction wheel (13) and a friction wheel drive motor that cooperates with the friction wheel (13). The control board (12) can transmit the projectile control signal to the friction wheel drive motor through the rotation signal processing circuit (8) and the slip ring (6) to adjust the speed of the friction wheel (13).
[0009] This utility model also includes a horizontal swing mechanism. The horizontal swing mechanism and the vertical swing mechanism cooperate with the machine head rotation mechanism to realize the adjustment and coordination of the ball's rotation offset angle, horizontal position, and pitch position in the ball launching machine head.
[0010] Compared with the prior art, the ball-serving machine head of this invention can achieve 360° rotation with the cooperation of the rotating slipknot sleeve and the machine head rotation mechanism. Therefore, when the ball-serving machine head needs to perform circumferential rotation, it can execute the shortest rotation path between the initial rotation position and the target position, thereby shortening the interval between consecutive ball serves. This is beneficial for simulating high-intensity training programs and thus improving the training level. Attached Figure Description
[0011] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] Appendix Figure 2 This is a cross-sectional view of the present invention.
[0013] Appendix Figure 3 This is a schematic diagram of the rotating hinge sleeve in this utility model.
[0014] Appendix Figure 4 This is a schematic diagram of the structure of the ball track outlet pipe and worm gear in this utility model.
[0015] Appendix Figure 5 This is a block diagram of the rotation control circuit in this utility model.
[0016] Appendix Figure 6 This is a schematic diagram of the rotation path in an embodiment of this utility model.
[0017] Reference numerals: ball lane outlet pipe (1), rotating live knot sleeve (2), rotating motor (3), transmission gear, rotating worm (4), worm wheel (5), slip ring (6), ball machine head support frame (7), rotation signal processing circuit (8), pinion (9), gearbox (10), longitudinal swing bend (11), control main board (12), friction wheel (13), motor support (14). Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] As attached Figure 1As shown, this utility model proposes a head rotation device for a table tennis ball serving machine, which includes a ball serving machine head and a head rotation mechanism. The ball serving machine head has a ball lane outlet pipe (1), and the ball lane outlet pipe (1) is equipped with a projectile assembly for throwing the ball. The head rotation mechanism is connected to the rear end of the ball lane outlet pipe (1) via a rotating swivel sleeve (2). The head rotation mechanism includes a rotary motor (3), a transmission gear, a rotary worm (4), a worm wheel (5), and a slip ring (6). The rotary motor (3) is fixed on the rotating swivel sleeve (2) via a motor support (14) and drives the rotary worm (4) to rotate via the transmission gear. The worm wheel (5) is installed on the ball lane outlet pipe (1) and cooperates with the rotary worm (4). The slip ring (6) is set on the ball serving machine head and the rotating swivel sleeve (2).
[0020] The slip ring (6) of this utility model is a disc slip ring, including a stator, a rotor and a spring. One end of the spring is connected to the stator and the other end of the spring is in contact with the rotor. The stator and the rotor are respectively provided with mounting holes so that the disc slip ring can be installed on the ball machine head support frame (7) and the rotating live joint sleeve (2) respectively. The rotor is welded with wires and further provided with a rotation signal processing circuit (8) connected to the wires of the slip ring (6). The stator and the rotor are connected by the spring and can achieve 360° rotation. The control signal of the control board (12) is transmitted to the rotation signal processing circuit (8) through the slip ring to control the speed of the drive motor of the upper and lower friction wheels.
[0021] In this invention, the front end of the rotating swivel sleeve (2) is fitted onto the ball inlet of the ball outlet pipe (1) of the ball machine head; the rear end of the rotating swivel sleeve (2) is connected to the longitudinal swing mechanism. Furthermore, this invention also provides a transverse swing mechanism. The transverse swing mechanism and the longitudinal swing mechanism cooperate with the machine head rotation mechanism to realize the adjustment and coordination of the ball throwing rotation offset angle, horizontal position, and pitch position in the ball machine head. Example
[0022] This example provides a head rotation device for a table tennis ball serving machine, which includes a serving machine head and a head rotation mechanism. The serving machine head has a ball lane outlet pipe (1), and the ball lane outlet pipe (1) is equipped with a projectile assembly for throwing the ball. The head rotation mechanism is connected to the rear end of the ball lane outlet pipe (1) via a rotating hinge sleeve (2). The head rotation mechanism includes a rotary motor (3), a transmission gear, a rotating worm (4), a worm wheel (5), and a slip ring (6). The rotary motor (3) is fixed on the rotating hinge sleeve (2) via a motor support and drives the rotating worm (4) to rotate via the transmission gear. The worm wheel (5) is installed on the ball lane outlet pipe (1) and cooperates with the rotating worm (4). (Specifically, the worm wheel (5)...) The tooth grooves are arranged along the outer circumference of the ball outlet pipe (1) to form a worm gear (5). The outer wall of the rotating swivel sleeve (2) is provided with a slot for accommodating the rotating worm (4) so that the tooth groove of the rotating worm (4) meshes with the tooth groove of the worm gear (5). The slip ring (6) is set on the ball machine head and the rotating swivel sleeve (2). The rear end of the rotating swivel sleeve (2) is connected to the longitudinal swing mechanism. The longitudinal swing mechanism is used to realize the vertical pitch attitude adjustment. Specifically, it is connected to the longitudinal swing bend (33) of the longitudinal swing mechanism. A horizontal swing mechanism is also provided. The horizontal swing mechanism is used to realize the horizontal swing. The horizontal swing mechanism and the longitudinal swing mechanism cooperate with the machine head rotation mechanism to realize the adjustment and coordination of the ball throwing rotation offset angle, horizontal position and pitch position in the ball machine head. In this example, a control board (12) is also provided. The control board (12) is connected to the control signal input terminal of the rotary motor (3) and is used to control the working state of the rotary motor (3). In addition, the control board (12) is also connected to the rotation signal processing circuit (8). The output terminal of the rotation signal processing circuit (8) is connected to the slip ring (6). The signal output terminal of the slip ring (6) is connected to the projectile drive motor in the projectile assembly and is used to send the control signal of the control board (12) to the projectile assembly. The projectile drive motor mentioned in this example refers to the friction wheel drive motor in the projectile assembly used to drive the friction wheel to rotate. A small gear (9) is led out from the rotating worm (4). The small gear (9) is connected to the gearbox (10). Through the transmission ratio conversion of the gearbox, the angle of the worm wheel rotation is converted into a digital signal and sent to the control board (12). In this example, during operation, the ball-feeding machine head can rotate 360° relative to the ball-feeding mechanism at the rear end of the rotating knot sleeve. That is, the ball-feeding angle of the ball-projecting component in the ball-feeding machine head can rotate 360° relative to the ball-feeding direction, as shown in the attached diagram. Figure 5As shown, when the training simulation serves, the angle shift from point A to point B is executed. The control motherboard (12) obtains the position parameters of monitoring point A based on the output data of the rotary motor (3), and then provides a basis for the external host to calculate the minimum rotation angle, so that the rotary motor (3) switches the rotation direction in time, drives the rotary worm (4) and worm wheel (5) to quickly reach the target point along the shortest execution path 1, and can execute a rapid shift at any angle in the circumference. Compared with similar equipment on the market that has limited shift angle or limited rotation direction, it can effectively shorten the interval time of each serve.
[0023] Compared with the prior art, the ball-serving machine head of this invention can achieve 360° rotation with the cooperation of the rotating slipknot sleeve and the machine head rotation mechanism. Therefore, when the ball-serving machine head needs to perform circumferential rotation, it can execute the shortest rotation path between the initial rotation position and the target position, thereby shortening the interval between consecutive ball serves. This is beneficial for simulating high-intensity training programs and thus improving the training level.
Claims
1. A head rotation device for a table tennis ball serving machine, comprising a ball serving machine head and a head rotation mechanism, wherein the ball serving machine head is provided with a ball channel outlet pipe (1), and a projectile assembly for throwing the ball is provided on the ball channel outlet pipe (1), and the head rotation mechanism is connected to the rear end of the ball channel outlet pipe (1) via a rotating hinged sleeve (2), characterized in that, The rotating mechanism of the machine head is provided with a rotating motor (3), a transmission gear, a rotating worm (4), a worm wheel (5), and a slip ring (6). The rotating motor (3) is fixed on the rotating swivel sleeve (2) by a motor support and drives the rotating worm (4) to rotate through the transmission gear. The worm wheel (5) is installed on the ball lane outlet pipe (1) and cooperates with the rotating worm (4). The slip ring (6) is set between the ball machine head and the rotating swivel sleeve (2).
2. The head rotating device for a table tennis ball server according to claim 1, wherein The slip ring (6) is a disc slip ring, including a stator, a rotor and a spring. One end of the spring is connected to the stator and the other end of the spring is in contact with the rotor. The stator and the rotor are respectively provided with mounting holes so that the disc slip ring can be installed on the ball machine head support frame (7) and the rotating live joint sleeve (2) respectively. The rotor is welded with wires and is provided with a rotation signal processing circuit (8) connected to the wires of the slip ring (6). The stator and the rotor are electrically connected through the contact of the spring. The rotation signal processing circuit (8) is connected to the projectile drive component in the projectile assembly.
3. The head rotating device for a table tennis ball server according to claim 2, wherein The rotating swivel sleeve (2) has a tubular sleeve body. The front end of the rotating swivel sleeve is fitted onto the ball inlet of the ball outlet pipe (1) of the ball machine head. The inner wall of the rotating swivel sleeve (2) and the outer wall of the ball outlet pipe (1) are provided with matching annular fitting grooves and annular fitting bosses, so that the ball outlet pipe (1) and the tubular sleeve body of the rotating swivel sleeve (2) can rotate relative to each other after being coaxially fitted.
4. The head rotating device for a table tennis ball server according to claim 3, wherein An installation space for accommodating the rotating worm (4) is provided on the outer wall of the rotating knot sleeve.
5. The head rotating device for a table tennis ball server according to claim 2, wherein A control motherboard is provided, and a pinion gear (9) is led out from the rotating worm (4). The pinion gear (9) is connected to the gearbox (10). Through the transmission ratio conversion of the gearbox (10), the rotation angle of the worm gear is converted into a digital signal and sent to the control motherboard (12). The control motherboard (12) is also connected to the rotation signal processing circuit (8) and the rotating motor (3).
6. The head rotating device for a table tennis ball server according to claim 5, wherein The projectile assembly includes a friction wheel and a friction wheel drive motor that works in conjunction with the friction wheel. The control board transmits the projectile control signal to the friction wheel drive motor through the rotation signal processing circuit (8) and the slip ring (6) to adjust the speed of the friction wheel.
7. The head rotating device for a table tennis ball server according to claim 1, wherein The rear end of the rotating swivel sleeve (2) is connected to the longitudinal swing mechanism.
8. The head rotating device for a table tennis ball server according to claim 1, wherein It also has a horizontal swing mechanism, which is located below the vertical swing mechanism.