Table tennis training throwing pitching machine

Abstract

The invention discloses a throwing pitching machine for table tennis training, and relates to the technical field of sports equipment, the throwing pitching machine comprises a machine body and a fixed comb mounted in the machine body, a ball feeding disc is rotatably mounted in the machine body, ball feeding grooves are formed in the outer wall of the ball feeding disc at equal intervals, a feeding disc is fixedly mounted at the top end of the machine body, and a guide column is mounted at the top end of the machine body; a feeding groove is formed between the feeding disc and the machine body, a feeding groove is formed between the guide column and the machine body, an embedding groove is formed in the machine body, and the feeding groove is communicated with the feeding groove through the embedding groove. The problem that table tennis balls are blocked due to the fact that the table tennis balls adhere to dust and hair is effectively solved, the drawing plate is driven by the driving assembly to reciprocate, the continuous air exhaust effect is achieved, and dust in the embedded groove and other parts is extracted into the air groove.

Description

Technical Field

[0001] The invention relates to the technical field of sports equipment, in particular to a table tennis training projectile serving machine. Background Art

[0002] In the field of automated table tennis training, a ball-shooting machine simulates different serving motions and trajectories, providing athletes with a consistent and stable supply of balls for training. Its operating principle primarily involves feeding the balls through a loading mechanism to a ball delivery mechanism, which then propels the balls through mechanical transmission or airflow. In real-world training scenarios, the training grounds are typically open or semi-open, where the prolonged rolling of balls can easily pick up debris such as dust and hair. When a ball carrying foreign matter enters the ball-shooting machine, defects in existing equipment can lead to serious operational failures.

[0003] Specifically, when hair clings to the surface of a ping-pong ball, it can easily become entangled in the inner wall of the channel or the rotating parts of the ball feed disc. As training continues, the entangled hair gradually accumulates, forming clumps that hinder the normal delivery of the ping-pong balls, causing them to be squeezed and piled up in the channel, or even completely blocking the feed channel. Furthermore, the ball feed troughs of existing ball feed discs lack the precision to adapt to the size of the ping-pong balls. When a ping-pong ball with dust clings to its surface roughness or slightly increases in size, the troughs may become unable to receive the ball or may become stuck, causing the ball to drastically increase the running resistance of the ball feed disc and, in severe cases, cause the motor to overload and shut down.

[0004] Furthermore, existing ball-serving machines have significant cleaning flaws. Some rely solely on periodic manual disassembly and cleaning, failing to remove foreign matter during training. While some machines incorporate simple filters, these filters are only effective against larger particles and have little effect on foreign matter like hair and fine dust. When dust enters the machine's internal transmission mechanisms, such as pulleys and gears, it exacerbates mechanical wear and reduces transmission efficiency. Dust accumulation in the airflow path can also affect the power and accuracy of serves, causing the trajectory of the serve to deviate, failing to meet the stability requirements of professional training.

[0005] For this reason, we propose a table tennis training projectile serving machine. Summary of the Invention

[0006] The purpose of the present invention is to provide a table tennis ball training projectile serving machine to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a table tennis training projectile serving machine, comprising a machine body and a fixed comb installed inside the machine body, a ball feeding disc is rotatably installed inside the machine body, and ball feeding grooves are equidistantly provided on the outer wall of the ball feeding disc, a loading disc is fixedly installed on the top of the machine body, a guide post is installed on the top of the machine body, a loading groove is provided between the loading disc and the machine body, a feeding groove is provided between the guide post and the machine body, an embedded groove is provided inside the machine body, the loading groove is connected to the feeding groove through the embedded groove, the fixed comb is installed on the inner wall of the embedded groove, and the outer wall of the ball feeding disc is equidistantly provided. A brush is fixedly installed at a distance, the opening of the fixed comb coincides with the center of the brush root, a negative pressure air duct is provided inside the feed trough, an air trough is provided on one side of the body, and connecting holes are symmetrically provided on the inner wall of the air trough, and the two connecting holes are respectively connected to the negative pressure air duct, a pull-out plate is slidably installed inside the air trough, and a driving component for driving the pull-out plate to reciprocate is provided between the pull-out plate and the ball feeding disc, and the driving component drives the pull-out plate to reciprocate so that the inside of the air trough is in a state of exhaust, and an exhaust component is provided inside the air trough, and the exhaust component is used to clean the dust inside the air trough.

[0008] Preferably, a movable comb is slidably mounted on one side of the fixed comb, a slider is fixedly mounted on the side of the movable comb close to the fixed comb, the slider is slidably mounted inside the fixed comb, and a first reset spring is fixedly mounted between the slider and the fixed comb.

[0009] Preferably, the driving assembly includes a driving pulley, a driven pulley, a turntable, a shift column, a T-shaped pull rod and a shift groove. A motor is installed inside the body, and the output end of the motor is fixedly installed on the axis of the ball feeding disc. A driving pulley is fixedly installed on the side of the ball feeding disc away from the motor. A driven pulley is installed inside the body and rotates in the same plane as the driving pulley. The driving pulley and the driven pulley are connected by a pulley transmission. A turntable is fixedly installed on one side of the driven pulley, and a shift column is fixedly installed on the side of the turntable away from the driven pulley away from its center. A T-shaped pull rod is fixedly connected to one side of the pull-out plate, and a shift groove is provided at one end of the T-shaped pull rod, and the shift column is slidably installed on the inner wall of the shift groove.

[0010] Preferably, trapezoidal slides are symmetrically fixedly installed on the inner wall of the wind trough, and air outlet holes are symmetrically opened on the inner side of the trapezoidal slides away from the connecting holes. The trapezoidal slides are provided with air outlets on one side of the two air outlet holes, and a first baffle is rotatably installed in the middle of the air outlet. A second baffle is rotatably installed on the inner wall of the wind trough at the connecting hole. The inside of the wind trough is divided into a first air chamber and a second air chamber by a pull-out plate, and the movement distance of the pull-out plate is less than the distance between the two connecting holes.

[0011] Preferably, the discharge assembly includes a connecting groove, a cleaning disk, a receiving groove, a discharge groove, a one-way gear, a C-shaped movable rod, a rack and a second return spring. A connecting groove is provided at the bottom end of the first air chamber and the second air chamber, and a cleaning disk is rotatably installed on the inner walls of the two connecting grooves. A receiving groove is provided at the cleaning disk away from the center of the circle, and a discharge groove is provided on the inner wall of the connecting groove. A one-way gear is fixedly connected to the center of the circle of the bottom end of the cleaning disk, and a C-shaped movable rod is symmetrically slidably connected to the inner wall of the wind trough. The bottom end of the C-shaped movable rod is fixedly connected to a rack, and the rack is meshed with the one-way gear. One end of the C-shaped movable rod is located in the wind trough and is fixedly connected to the second return spring, and one end of the second return spring is fixedly connected to the inner wall of the wind trough.

[0012] Preferably, an avoidance groove is provided on one side of the fixed comb, a trapezoidal push block is equidistantly fixedly connected to one side of the ball feeding disc, the inclined surface of the trapezoidal push block faces the movable comb, and one end of the movable comb is designed as a blade.

[0013] Preferably, inclined blocks are symmetrically fixedly mounted on the inner walls of the first air chamber and the second air chamber, and the bottom ends of the inclined surfaces of the inclined blocks just touch the edge of the accommodating groove.

[0014] Preferably, the pull-out plate makes a single reciprocating motion, driving the cleaning disks inside the first air chamber and the second air chamber to rotate one circle respectively, and ensuring that the receiving groove on the cleaning disk overlaps with the discharge groove in the connecting groove once.

[0015] Preferably, a cover plate is installed on the inner wall of the air duct by bolts, and the cover plate and the air duct form a closed space.

[0016] Preferably, adhesive stickers are fixedly mounted on the tops of the first air chamber and the second air chamber respectively.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Efficient anti-clogging and stable ball delivery: Through the unique design of the loading tray, ball delivery tray, and supporting channels, combined with the synergistic effect of the fixed comb and movable comb, the problem of clogging caused by dust and hair sticking to the table tennis balls is effectively avoided. The brush on the outer wall of the ball delivery tray works in conjunction with the fixed comb to promptly clean hair entangled in the ball delivery components, preventing it from obstructing the delivery of the table tennis balls. The shearing structure formed by the movable comb and the trapezoidal push block can cut long hair short to avoid the formation of tangled clumps. At the same time, the precisely adapted ball delivery trough design reduces the problem of ball jams caused by dust on the surface of the table tennis balls, ensuring that the table tennis balls can be transported stably and continuously along the predetermined channel driven by the ball delivery tray, greatly improving the smoothness and stability of the ball delivery process of the ball machine, and ensuring that the training process is not interrupted by equipment failure.

[0019] Automatic cleaning and long-term maintenance: The innovative combination of structures such as the air trough, pull-out plate, negative pressure airway and exhaust assembly realizes the automatic cleaning of dust and foreign matter inside the ball machine. Driven by the drive assembly, the pull-out plate reciprocates to form a continuous suction effect, continuously extracting dust embedded in the slot and other parts into the air trough. The self-adhesive sticker in the air trough can effectively absorb floating dust, while the exhaust assembly composed of the cleaning disc, one-way gear, C-shaped movable rod, etc. can automatically collect and discharge particulate dust. This automatic cleaning mechanism does not require frequent manual disassembly of the equipment for cleaning, which not only saves maintenance time and labor costs, but also reduces the risk of equipment damage caused by manual operation, extends the service life of the ball machine, and reduces long-term use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the present invention as a whole located at the position of a table tennis table;

[0021] Figure 2 It is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a side cross-section of the body of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the negative pressure airway of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the driven pulley of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the extrusion side of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the present invention with the cover plate removed from one side of the body;

[0027] Figure 8 This is a schematic diagram of the overall internal structure of the air duct of the present invention;

[0028] Figure 9 This is a schematic structural diagram of the first baffle and the second baffle of the present invention;

[0029] Figure 10 It is a structural schematic diagram of the connecting groove of the present invention;

[0030] Figure 11 This is a structural diagram of the cleaning disk position of the present invention;

[0031] Figure 12 This is a schematic diagram of the structure of the air outlet in the air trough of the present invention;

[0032] Figure 13 This is a schematic structural diagram of the bottom of the cleaning plate of the present invention;

[0033] Figure 14 Schematic diagram of the pull groove structure of the T-shaped pull rod of the present invention;

[0034] Figure 15 This is a schematic diagram of the structure of the fixed comb of the present invention embedded in the groove;

[0035] Figure 16 It is a schematic diagram of the overall structure of the fixed comb and the movable comb of the present invention;

[0036] Figure 17 It is a structural schematic diagram of the separation of the fixed comb and the movable comb of the present invention.

[0037] Figure: 1. Machine body; 2. Fixed comb; 3. Ball feeding tray; 4. Ball feeding slot; 5. Loading tray; 6. Guide post; 7. Embedding slot; 8. Brush; 9. Negative pressure airway; 10. Air slot; 11. Connecting hole; 12. Pull-out plate; 13. Movable comb; 14. Slider; 15. First return spring; 16. Tilt block; 31. Driving pulley; 32. Driven pulley; 33. Turntable; 34. Shifting post; 35. T Type pull rod; 36, pull groove; 41, trapezoidal slide; 42, air outlet; 43, air outlet; 44, first baffle; 45, second baffle; 46, first air chamber; 47, second air chamber; 51, connecting groove; 52, cleaning plate; 53, receiving groove; 54, discharge groove; 55, one-way gear; 56, C-type movable rod; 57, rack; 58, second return spring; 61, avoidance groove; 62, trapezoidal push block. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1-17As shown, a table tennis training projectile serving machine includes a body 1 and a fixed comb 2 installed inside the body 1, a ball feeding disc 3 is rotatably installed inside the body 1, and a ball feeding groove 4 is equidistantly opened on the outer wall of the ball feeding disc 3, a loading disc 5 is fixedly installed on the top of the body 1, a guide column 6 is installed on the top of the body 1, a loading groove is opened between the loading disc 5 and the body 1, a feeding groove is opened between the guide column 6 and the body 1, an embedding groove 7 is opened inside the body 1, the loading groove is connected with the feeding groove through the embedding groove 7, the fixed comb 2 is installed on the inner wall of the embedding groove 7, and a brush 8 is fixedly installed on the outer wall of the ball feeding disc 3 at an equal distance, the opening of the fixed comb 2 coincides with the center of the root of the brush 8, a negative pressure airway 9 is opened inside the feeding groove, an air groove 10 is opened on one side of the body 1, and connecting holes 11 are symmetrically opened on the inner wall of the air groove 10, and the two connecting holes 11 are respectively connected to the negative pressure airway 9, and a pull-out device is slidably installed inside the air groove 10. The plate 12 is provided with a driving component for driving the reciprocating movement of the drawing plate 12 and the ball feeding disc 3. The driving component drives the drawing plate 12 to reciprocate so that the air is exhausted inside the air trough 10. An exhaust component is provided inside the air trough 10, and the exhaust component is used to clean the dust inside the air trough 10. A movable comb 13 is slidably installed on one side of the fixed comb 2. A slider 14 is fixedly installed on the side of the movable comb 13 close to the fixed comb 2. The slider 14 is slidably installed inside the fixed comb 2. A first return spring 15 is fixedly installed between the slider 14 and the fixed comb 2. An avoidance groove 61 is provided on one side of the fixed comb 2, and a trapezoidal push block 62 is equidistantly fixedly connected to one side of the ball feeding disc 3. The inclined surface of the trapezoidal push block 62 faces the movable comb 13, and one end of the movable comb 13 is designed as a blade. A cover plate is installed on the inner wall of the air trough 10 by bolts, and the cover plate and the air trough 10 form a closed space;

[0040] Loading tray 5: as a storage container for table tennis balls, placed on the top of the body 1, providing an initial source for the delivery of table tennis balls;

[0041] Feeding chute: It is located between the feeding tray 5 and the machine body 1 and is the passage for the table tennis balls to enter the machine body 1 from the feeding tray 5;

[0042] Insertion slot 7: located inside the body 1, serves to connect the loading slot and the feeding slot, allowing the table tennis balls to smoothly enter the conveying channel from the storage position;

[0043] Feeding trough: connected to the embedding groove 7, it is the transition channel for the table tennis balls to be transported to the ball feeding plate 3;

[0044] Ball feeding disc 3: Installed inside the body 1 and rotatable, its outer wall is provided with ball feeding grooves 4 at equal intervals; when the motor drives the ball feeding disc 3 to rotate, the ball feeding grooves 4 pass through the feeding trough in sequence, receive the table tennis balls and rotate accordingly, thus realizing the transportation of table tennis balls;

[0045] Brushes 8 are fixedly installed on the outer wall of the ball feeding tray 3 at equal intervals. When the ball feeding tray 3 rotates, if there is hair inside the body 1, the brushes 8 will entangle it and play a role in preliminarily collecting the hair.

[0046] Fixed comb 2: installed on the inner wall of embedded groove 7, its opening coincides with the center of the root of brush 8; when the brush 8 with hair wrapped around it passes through fixed comb 2, fixed comb 2 can clean the hair off the brush 8, preventing excessive hair from affecting the normal operation of ball feeding plate 3;

[0047] Movable comb 13: Slidingly mounted on one side of the fixed comb 2, a slider 14 is fixedly mounted on the side close to the fixed comb 2, the slider 14 slides inside the fixed comb 2, and a first return spring 15 is fixedly mounted between the slider 14 and the fixed comb 2; an avoidance groove 61 is provided on one side of the fixed comb 2, and a trapezoidal push block 62 is equidistantly fixedly connected to one side of the ball feeding disc 3, the inclined surface of the trapezoidal push block 62 faces the movable comb 13, and one end of the movable comb 13 is designed as a blade; when the ball feeding disc 3 rotates, the trapezoidal push block 62 enters the avoidance groove 61, pushing the movable comb 13 to move, and the movable comb 13 and the fixed comb 2 form a shearing motion, cutting longer hairs short, so that they can be subsequently sucked into the air trough 10 by negative pressure;

[0048] The driving assembly includes a driving pulley 31, a driven pulley 32, a turntable 33, a shift post 34, a T-shaped pull rod 35 and a shift slot 36. A motor is installed inside the body 1, and the output end of the motor is fixedly installed with the axis of the ball feeding disc 3. The ball feeding disc 3 is fixedly installed with a driving pulley 31 on the side away from the motor. The driven pulley 32 is rotatably installed in the same plane as the driving pulley 31 inside the body 1. The driving pulley 31 and the driven pulley 32 are connected through a pulley transmission. A turntable 33 is fixedly installed on one side of the driven pulley 32. A shift post 34 is fixedly installed on the side of the turntable 33 away from the driven pulley 32 away from its center. A T-shaped pull rod 35 is fixedly connected to one side of the pull-out plate 12. A shift slot 36 is provided at one end of the T-shaped pull rod 35, and the shift post 34 is slidably installed on the inner wall of the shift slot 36.

[0049] Motor: installed inside the machine body 1, with its output end fixedly connected to the axis of the ball feeding disc 3, providing power for the rotation of the ball feeding disc 3 and being the power source for the entire machine operation;

[0050] Driving pulley 31: fixedly mounted on the side of the ball feeding disc 3 away from the motor, and rotates as the ball feeding disc 3 rotates;

[0051] Driven pulley 32: Located in the same plane as the driving pulley 31 and rotatably mounted inside the body 1, it is connected to the driving pulley 31 via a belt to transmit the power of the driving pulley 31;

[0052] Rotating disk 33: fixedly mounted on one side of the driven pulley 32 and rotates together with the driven pulley 32;

[0053] The shifting post 34 is fixedly mounted on the side of the turntable 33 away from the driven pulley 32 and away from the center of the turntable 33. When the turntable 33 rotates, the shifting post 34 moves in a circular motion.

[0054] A T-shaped pull rod 35 has one end fixedly connected to the pull plate 12 and the other end having a shifting slot 36 . The shifting post 34 is slidably mounted on the inner wall of the shifting slot 36 . The circular motion of the shifting post 34 drives the T-shaped pull rod 35 to perform linear reciprocating motion through the shifting slot 36 , thereby driving the pull plate 12 to perform reciprocating motion within the air duct 10 .

[0055] Trapezoidal slides 41 are symmetrically fixedly installed on the inner wall of the air trough 10, and air outlet holes 42 are symmetrically opened on the inner side of the trapezoidal slides 41 away from the connecting holes 11. The trapezoidal slides 41 are provided with air outlets 43 on one side of the two air outlet holes 42. A first baffle 44 is rotatably installed in the middle of the air outlet 43. A second baffle 45 is rotatably installed on the inner wall of the air trough 10 at the connecting hole 11. The interior of the air trough 10 is divided into a first air chamber 46 and a second air chamber 47 by the pull-out plate 12, and the distance moved by the pull-out plate 12 is less than the distance between the two connecting holes 11;

[0056] Air duct 10: Opened on one side of the body 1, the interior is divided into a first air chamber 46 and a second air chamber 47 by a pull-out plate 12. It is a key space for achieving air extraction and dust treatment;

[0057] Connection holes 11: symmetrically opened on the inner wall of the air trough 10, respectively connected to the negative pressure air duct 9 inside the feeding trough, and are the channels for air and dust to enter the air trough 10 from the negative pressure air duct 9;

[0058] Negative pressure air duct 9: opened inside the feeding trough, connected to the air duct 10 through the connecting hole 11. Under the suction effect of the air duct 10, the dust embedded in the slot 7 is extracted into the interior of the air duct 10;

[0059] Trapezoidal slides 41 are symmetrically fixed to the inner wall of the duct 10 to support and guide the airflow. Air outlet holes 42 are symmetrically formed on the inner side of the trapezoidal slide 41 away from the connection hole 11. An air outlet 43 is formed on one side of the two air outlet holes 42 to serve as a channel for the exhaust of air from the duct 10.

[0060] The first baffle 44 is rotatably mounted in the middle of the air outlet 43 and rotates according to the change of the air pressure inside the air chamber to control whether the air is discharged from the air outlet 43;

[0061] The second baffle 45 is rotatably mounted on the inner wall of the air duct 10 at the connection hole 11. It rotates according to the change of the air pressure inside the air chamber to control whether the air enters the air chamber through the connection hole 11.

[0062] When the pull-out plate 12 moves to the right, the space in the first air chamber 46 increases, the air pressure decreases, the second baffle 45 opens, and the air carrying dust is sucked into the first air chamber 46 through the negative pressure air duct 9 and the connecting hole 11, and the first baffle 44 closes; the space in the second air chamber 47 decreases, the air pressure increases, the second baffle 45 closes, the first baffle 44 opens, and the air is discharged through the air outlet 42 and the air outlet 43; when the pull-out plate 12 moves to the left, the situation is reversed, the first air chamber 46 exhausts air, and the second air chamber 47 inhales air; the reciprocating motion of the pull-out plate 12 ensures that the negative pressure air duct 9 is always in the exhaust state;

[0063] The discharge assembly includes a connecting groove 51, a cleaning disc 52, a receiving groove 53, a discharge groove 54, a one-way gear 55, a C-shaped movable rod 56, a rack 57 and a second return spring 58. The bottom ends of the first air chamber 46 and the second air chamber 47 are both provided with a connecting groove 51. The inner walls of the two connecting grooves 51 are rotatably mounted with a cleaning disc 52. The cleaning disc 52 is provided with a receiving groove 53 away from the center of the circle. The inner wall of the connecting groove 51 is provided with a discharge groove 54. The center of the bottom end of the cleaning disc 52 is fixedly connected with a one-way gear 55. The inner wall of the wind groove 10 is symmetrically slidably connected with a C-shaped movable rod 56. The bottom end of the C-shaped movable rod 56 is fixedly connected with a rack 57. The rack 57 is connected to the one-way gear 55 is engaged and connected, and the C-shaped movable rod 56 is located at one end of the wind groove 10 and is fixedly connected to the second return spring 58. One end of the second return spring 58 is fixedly connected to the inner wall of the wind groove 10. The inner walls of the first air chamber 46 and the second air chamber 47 are symmetrically fixed with tilting blocks 16, and the bottom end of the inclined surface of the tilting block 16 just contacts the edge of the receiving groove 53. The pull-out plate 12 makes a single reciprocating motion, driving the cleaning disk 52 inside the first air chamber 46 and the second air chamber 47 to rotate one circle respectively, and ensuring that the receiving groove 53 on the cleaning disk 52 coincides with the discharge groove 54 in the connecting groove 51 once. The tops of the first air chamber 46 and the second air chamber 47 are respectively fixed with self-adhesive stickers;

[0064] Self-adhesive stickers: They are fixedly mounted on the top of the first air chamber 46 and the second air chamber 47 respectively; when dust is drawn into the air trough 10 by the air flow, some lighter, floating dust will move upward under the influence of the air flow and be stuck to the self-adhesive stickers, thus cleaning the floating dust;

[0065] Connecting groove 51: It is respectively opened at the bottom end of the first air chamber 46 and the second air chamber 47, and is a transition channel for the dust particles to be discharged from the air chamber;

[0066] Cleaning disk 52: rotatably mounted on the inner wall of connecting groove 51, with a receiving groove 53 formed away from the center; used to collect dust particles settled from the air chamber;

[0067] Discharge slot 54: It is formed on the inner wall of the connecting slot 51. When the receiving slot 53 on the cleaning plate 52 overlaps with the discharge slot 54, the dust particles are discharged from the air slot 10 through the discharge slot 54.

[0068] One-way gear 55: fixedly connected to the center of the bottom end of the cleaning disk 52, meshing with the rack 57 at the bottom end of the C-shaped movable rod 56, realizing the conversion between the linear motion of the C-shaped movable rod 56 and the rotation of the cleaning disk 52;

[0069] A C-shaped movable rod 56 is symmetrically slidably connected to the inner wall of the air duct 10. One end of the rod is associated with the movement of the pull-out plate 12, and the other end is fixedly connected to the rack 57. The movement of the pull-out plate 12 pushes the C-shaped movable rod 56 to slide, thereby driving the rack 57 to move.

[0070] Rack 57: meshes with the one-way gear 55, transmits the linear motion of the C-shaped movable rod 56 to the one-way gear 55, and rotates the cleaning disk 52;

[0071] A second return spring 58 has one end fixedly connected to one end of the C-shaped movable rod 56 located at the air duct 10, and the other end fixedly connected to the inner wall of the air duct 10. When the pull plate 12 moves in the reverse direction, the C-shaped movable rod 56 is reset by the action of the second return spring 58, driving the cleaning disk 52 to rotate again.

[0072] The tilting block 16 is symmetrically fixedly mounted on the inner wall of the first air chamber 46 and the second air chamber 47, with the bottom end of the tilting surface just touching the edge of the receiving groove 53; it plays the role of guiding the settled dust particles into the receiving groove 53;

[0073] The pull-out plate 12 makes a single reciprocating motion, driving the cleaning disc 52 inside the first air chamber 46 and the second air chamber 47 to rotate one circle respectively, ensuring that the receiving groove 53 on the cleaning disc 52 overlaps with the discharge groove 54 in the connecting groove 51 once, thereby realizing the discharge of particle dust.

[0074] Working principle:

[0075] Table tennis ball conveying principle

[0076] A loading tray 5 is mounted on the top of the body 1 and serves as a storage component for the table tennis balls, providing a source of balls for subsequent conveying. A loading chute is provided between the loading tray 5 and the body 1, which is the passage for the table tennis balls to enter the body 1 from the loading tray 5. An embedded groove 7 inside the body 1 connects the loading chute and the feeding chute, acting as a transition and ensuring that the table tennis balls can be smoothly transferred from the storage position to the conveying channel.

[0077] The ball feeding disc 3 is rotatably mounted inside the body 1, and the ball feeding grooves 4 are evenly spaced on its outer wall. The motor drives the ball feeding disc 3 to rotate. When the ball feeding grooves 4 pass through the feeding trough in turn, they will receive the table tennis balls conveyed from the feeding trough and transport the table tennis balls to the designated position as the ball feeding disc 3 rotates, thus completing the task of conveying table tennis balls.

[0078] Brush and fixed comb for cleaning

[0079] Brushes 8 are fixedly installed at equal intervals on the outer wall of the ball feeding tray 3; during the rotation of the ball feeding tray 3, if there is hair inside the body 1, the brushes 8 will entangle the hair; the fixed comb 2 is installed on the inner wall of the embedding groove 7, and its opening coincides with the center of the root of the brush 8; when the brush 8 with entangled hair passes through the fixed comb 2, the fixed comb 2 can clean the hair off the brush 8, preventing excessive hair from affecting the normal operation of the ball feeding tray 3;

[0080] Active comb to assist in cutting hair

[0081] A movable comb 13 is slidably installed on one side of the fixed comb 2. The side of the movable comb 13 close to the fixed comb 2 slides inside the fixed comb 2 through a slider 14. A first return spring 15 is installed between the slider 14 and the fixed comb 2. An avoidance groove 61 is provided on one side of the fixed comb 2. Trapezoidal push blocks 62 are equidistantly provided on one side of the ball feeding disc 3. The inclined surface of the trapezoidal push blocks 62 faces the movable comb 13. One end of the movable comb 13 is designed as a blade.

[0082] When the ball feeding disc 3 rotates, the trapezoidal push block 62 enters the avoidance groove 61, pushing the movable comb 13 to overcome the elastic force of the first return spring 15 to perform a linear motion; the movable comb 13 and the fixed comb 2 form a shearing motion, cutting the longer hairs short so that they can be sucked into the air trough 10 by the negative pressure later; when the trapezoidal push block 62 leaves the avoidance groove 61, the movable comb 13 is reset under the action of the first return spring 15, preparing for the next hair cutting;

[0083] Negative pressure exhaust and dust cleaning principle

[0084] Drive assembly transmission mechanism

[0085] The motor is installed inside the body 1, and its output end is fixedly connected to the axis of the ball feeding disc 3, providing power for the rotation of the ball feeding disc 3; a driving pulley 31 is installed on the side of the ball feeding disc 3 away from the motor, and rotates synchronously with the ball feeding disc 3; a driven pulley 32 is installed inside the body 1 and rotates in the same plane as the driving pulley 31, and is connected to the driving pulley 31 through a belt transmission;

[0086] A turntable 33 is installed on one side of the driven pulley 32, and a shift post 34 is installed on the side of the turntable 33 away from the driven pulley 32 and away from the center of the circle; one end of the T-shaped pull rod 35 is fixedly connected to the pull-out plate 12, and the other end is provided with a shift groove 36, and the shift post 34 slides on the inner wall of the shift groove 36; the motor drives the ball feeding disc 3 to rotate, driving the active pulley 31 to rotate, and the driven pulley 32 to rotate through the belt transmission, thereby driving the turntable 33 to rotate; the shift post 34 on the turntable 33 performs a circular motion, and drives the T-shaped pull rod 35 to perform a linear reciprocating motion through the shift groove 36, finally realizing the reciprocating motion of the pull-out plate 12 in the air trough 10;

[0087] Principle of air duct extraction

[0088] The air trough 10 is opened on one side of the machine body 1, and the interior is divided into a first air chamber 46 and a second air chamber 47 by a pull-out plate 12, and the movement distance of the pull-out plate 12 is less than the distance between the two connecting holes 11; the inner wall of the air trough 10 is symmetrically provided with connecting holes 11, which are respectively connected to the negative pressure air duct 9 inside the feeding trough; the trapezoidal slide 41 is symmetrically fixedly installed on the inner wall of the air trough 10, and the inner side of the trapezoidal slide 41 away from the connecting holes 11 is symmetrically provided with air outlet holes 42, and the trapezoidal slide 41 is provided with an air outlet 43 on one side of the two air outlet holes 42, and a first baffle 44 is rotatably installed in the middle of the air outlet 43, and a second baffle 45 is rotatably installed on the inner wall of the air trough 10 at the connecting hole 11;

[0089] When the pull-out plate 12 moves to the right, the space in the first air chamber 46 increases, the air pressure decreases, and the second baffle 45 opens under the action of the air pressure difference. The outside air carrying the dust extracted from the embedded groove is sucked into the first air chamber 46 through the negative pressure air duct 9 and the connecting hole 11. The first baffle 44 closes under the action of the air pressure difference to prevent the air from being discharged from the air outlet 43. At the same time, the space in the second air chamber 47 decreases, the air pressure increases, and the second baffle 45 closes to prevent the air from flowing back into the negative pressure air duct 9. The first baffle 44 opens, and the air in the second air chamber 47 is discharged through the air outlet 42 and the air outlet 43.

[0090] When the pull-out plate 12 moves to the left, the space in the first air chamber 46 decreases, the air pressure increases, the second baffle 45 closes, the first baffle 44 opens, and the air in the first air chamber 46 is discharged through the air outlet 42 and the air outlet 43; the space in the second air chamber 47 increases, the air pressure decreases, the second baffle 45 opens, and the outside air carrying dust is sucked into the second air chamber 47 through the negative pressure air duct 9 and the connecting hole 11, and the first baffle 44 closes; the reciprocating motion of the pull-out plate 12 ensures that the negative pressure air duct 9 is always in the exhaust state, and the dust embedded in the groove 7 is extracted into the inside of the air duct 10;

[0091] Dust cleaning method

[0092] Floating dust cleaning

[0093] Adhesive stickers are fixed on the top of the first air chamber 46 and the second air chamber 47 respectively; when the dust is drawn into the air trough 10 by the air flow, some of the lighter floating dust moves upward under the influence of the air flow and is stuck to the adhesive stickers when it contacts them, thereby achieving the cleaning of the floating dust;

[0094] Particle dust cleaning

[0095] The first air chamber 46 and the second air chamber 47 have connecting grooves 51 at their bottom ends, and a cleaning disc 52 is rotatably mounted on the inner wall of the connecting groove 51. A receiving groove 53 is formed at a position of the cleaning disc 52 away from the center, and a discharge groove 54 is formed on the inner wall of the connecting groove 51. A one-way gear 55 is fixedly connected to the center of the bottom end of the cleaning disc 52. A C-shaped movable rod 56 is symmetrically slidably connected to the inner wall of the air trough 10. The bottom end of the C-shaped movable rod 56 is fixedly connected to a rack 57, which meshes with the one-way gear 55. One end of the C-shaped movable rod 56 located at the air trough 10 is fixedly connected to a second return spring 58, and the other end of the second return spring 58 is fixedly connected to the inner wall of the air trough 10. Tilting blocks 16 are symmetrically fixedly mounted on the inner walls of the first air chamber 46 and the second air chamber 47, and the bottom end of the inclined surface of the tilting block 16 contacts the edge of the receiving groove 53.

[0096] The reciprocating motion of the pull-out plate 12 pushes the C-shaped movable rod 56 to slide on the inner wall of the air trough 10. The rack 57 at the bottom end of the C-shaped movable rod 56 engages with the one-way gear 55, driving the cleaning disk 52 to rotate. When the pull-out plate 12 moves in the opposite direction, the C-shaped movable rod 56 is reset by the second return spring 58, driving the cleaning disk 52 to rotate again. The single reciprocating motion of the pull-out plate 12 drives the cleaning disk 52 inside the first air chamber 46 and the second air chamber 47 to rotate one circle each.

[0097] In the air trough 10, the particulate dust settles downward due to gravity, and the inclined block 16 guides the settled particulate dust into the receiving groove 53 of the cleaning disk 52; when the cleaning disk 52 rotates to make the receiving groove 53 coincide with the discharge groove 54, the particulate dust in the receiving groove 53 is discharged from the air trough 10 through the discharge groove 54 under the action of gravity, thereby completing the cleaning of the particulate dust.

[0098] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0099] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A table tennis training projectile serving machine, comprising a machine body (1) and a fixed comb (2) installed inside the machine body (1), a ball feeding disc (3) rotatably installed inside the machine body (1), and ball feeding grooves (4) are equidistantly provided on the outer wall of the ball feeding disc (3), a loading disc (5) is fixedly installed on the top of the machine body (1), a guide post (6) is installed on the top of the machine body (1), a loading groove is provided between the loading disc (5) and the machine body (1), a feeding groove is provided between the guide post (6) and the machine body (1), an embedding groove (7) is provided inside the machine body (1), and the loading groove is communicated with the feeding groove through the embedding groove (7), characterized in that: A fixed comb (2) is installed on the inner wall of the embedded groove (7), and a brush (8) is fixedly installed on the outer wall of the ball feeding disc (3) at equal intervals. The opening of the fixed comb (2) coincides with the center of the root of the brush (8). A negative pressure air duct (9) is provided inside the feeding trough. An air trough (10) is provided on one side of the machine body (1). Connecting holes (11) are symmetrically provided on the inner wall of the air trough (10). The two connecting holes (11) are respectively connected to the negative pressure air duct (9). A pull-out plate (12) is slidably installed inside the air trough (10). A driving component for driving the pull-out plate (12) to reciprocate is provided between the pull-out plate (12) and the ball feeding disc (3). The driving component drives the pull-out plate (12) to reciprocate so that the air trough (10) is in an exhaust state. An exhaust component is provided inside the air trough (10). The exhaust component is used to clean dust inside the air trough (10).

2. A table tennis ball training projectile serving machine according to claim 1, characterized in that: A movable comb (13) is slidably mounted on one side of the fixed comb (2); a slider (14) is fixedly mounted on the side of the movable comb (13) close to the fixed comb (2); the slider (14) is slidably mounted inside the fixed comb (2); and a first return spring (15) is fixedly mounted between the slider (14) and the fixed comb (2).

3. A table tennis ball training projectile serving machine according to claim 1, characterized in that: The driving assembly includes a driving pulley (31), a driven pulley (32), a rotating disc (33), a shifting column (34), a T-shaped pull rod (35) and a shifting groove (36). A motor is installed inside the body (1). The output end of the motor is fixedly installed with the axis of the ball feeding disc (3). The ball feeding disc (3) is fixedly installed with a driving pulley (31) on the side away from the motor. A driven pulley (32) is installed in the body (1) in the same plane as the driving pulley (31). The pulley (31) and the driven pulley (32) are connected via a pulley transmission. A turntable (33) is fixedly installed on one side of the driven pulley (32). A shifting post (34) is fixedly installed on a side of the turntable (33) away from the driven pulley (32) and away from the center thereof. A T-shaped pull rod (35) is fixedly connected to one side of the pull plate (12). A shifting groove (36) is provided at one end of the T-shaped pull rod (35). The shifting post (34) is slidably installed on the inner wall of the shifting groove (36).

4. A table tennis ball training projectile serving machine according to claim 1, characterized in that: A trapezoidal slide bar (41) is symmetrically fixedly installed on the inner wall of the wind trough (10), and an air outlet hole (42) is symmetrically opened on the inner side of the trapezoidal slide bar (41) away from the connecting hole (11). An air outlet (43) is opened on one side of the two air outlet holes (42), and a first baffle (44) is rotatably installed in the middle of the air outlet (43). A second baffle (45) is rotatably installed on the inner wall of the wind trough (10) at the outlet of the connecting hole (11). The interior of the wind trough (10) is divided into a first air chamber (46) and a second air chamber (47) by a pull-out plate (12), and the distance moved by the pull-out plate (12) is less than the distance between the two connecting holes (11).

5. A table tennis training projectile serving machine according to claim 4, characterized in that: The discharge assembly includes a connecting groove (51), a cleaning disk (52), a receiving groove (53), a discharge groove (54), a one-way gear (55), a C-shaped movable rod (56), a rack (57) and a second return spring (58). The bottom ends of the first air chamber (46) and the second air chamber (47) are both provided with a connecting groove (51). The inner walls of the two connecting grooves (51) are both rotatably mounted with a cleaning disk (52). The cleaning disk (52) is provided with a receiving groove (53) away from the center of the circle. The inner wall of the connecting groove (51) is provided with a A discharge groove (54) is provided, a one-way gear (55) is fixedly connected at the center of the bottom end of the cleaning disk (52), a C-shaped movable rod (56) is symmetrically slidably connected to the inner wall of the wind groove (10), the bottom end of the C-shaped movable rod (56) is fixedly connected to a rack (57), the rack (57) is meshed with the one-way gear (55), one end of the C-shaped movable rod (56) located in the wind groove (10) is fixedly connected to a second return spring (58), and one end of the second return spring (58) is fixedly connected to the inner wall of the wind groove (10).

6. A table tennis ball training projectile serving machine according to claim 2, characterized in that: A avoidance groove (61) is provided on one side of the fixed comb (2), and a trapezoidal push block (62) is fixedly connected to one side of the ball feeding plate (3) at equal intervals. The inclined surface of the trapezoidal push block (62) faces the movable comb (13), and one end of the movable comb (13) is designed as a blade.

7. A table tennis ball training projectile serving machine according to claim 4, characterized in that: Inclined blocks (16) are symmetrically fixedly mounted on the inner walls of the first air chamber (46) and the second air chamber (47), and the bottom ends of the inclined surfaces of the inclined blocks (16) just contact the edges of the accommodating grooves (53).

8. A table tennis ball training projectile serving machine according to claim 4, characterized in that: The pulling plate (12) performs a single reciprocating motion, driving the cleaning discs (52) inside the first air chamber (46) and the second air chamber (47) to rotate once respectively, and ensuring that the receiving groove (53) on the cleaning disc (52) overlaps once with the discharge groove (54) in the connecting groove (51).

9. A table tennis ball training projectile serving machine according to claim 1, characterized in that: A cover plate is mounted on the inner wall of the air trough (10) via bolts, and the cover plate and the air trough (10) form a closed space.

10. A table tennis ball training projectile serving machine according to claim 1, characterized in that: The top ends of the first air chamber (46) and the second air chamber (47) are respectively fixedly mounted with adhesive tapes.

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