Spiking trainer for volleyball training

Abstract

The invention relates to the technical field of volleyball training devices, in particular to a spiking trainer for volleyball training, which comprises a ball feeding barrel and a ball containing barrel, two ball clamping plates are symmetrically fixed at the lower end of the ball feeding barrel, the lower end of the ball containing barrel is communicated with the inner side of the ball feeding barrel through a ball feeding pipe, and the ball containing barrel is fixed on the ground through a support. Through the effect of the transposition mechanism, after a sportsman discharges volleyballs clamped between the two movable clamping plates every time the volleyballs are spiked, the two upper stop levers can be controlled to be combined, the two lower stop levers can be controlled to be separated, so that the volleyballs supported on the two lower stop levers fall between the two movable clamping plates, the effect of automatically supplementing the volleyballs is achieved, continuous spiking training can be achieved, and the training efficiency is improved. The device is simple in structure and convenient to use, all energy of an athlete can be concentrated on spiking skills instead of auxiliary links such as ball picking and preparation, the device is particularly suitable for specialized training scenes such as high-intensity intermittent training and multi-ball continuous spiking, and the training period is effectively shortened.

Description

Technical Field

[0001] This invention relates to the field of volleyball training equipment technology, and in particular to a volleyball spiking practice device. Background Technology

[0002] In volleyball training, spiking is one of the key skills that athletes must master. Spiking training places high demands on athletes' jumping ability, arm swing speed, and control of the hitting point. To facilitate athletes' spiking training, a spiking device is needed to assist in the training. The spiking device can hold and support the volleyball at a specified height, making it easier for athletes to hit the volleyball.

[0003] A search revealed Chinese patent CN207886635U, which discloses a volleyball spiking training device, comprising a base, a universal wheel, a telescopic rod, and a buckle. A pulley frame is located on the lower side of one end of the base, with a brake handle at one end. The universal wheel is located on the lower side of the pulley frame. A second pulley frame is located on the side of one end of the base away from the first pulley frame, with a second universal wheel located below the second pulley frame. A second telescopic rod is located on the upper side of the base, with a slot in the middle. The first telescopic rod is located on the upper side of the second telescopic rod, with a slot at the lower end. A pivot is located at the upper end of the first telescopic rod, and a handle is located on the upper side of the first telescopic rod.

[0004] Based on the above search and combined with the actual problem, it was found that the spiking device is a common structure on the market. Its function is limited. It can only clamp and support the volleyball and does not have an automatic ball replenishment function. Every time the athlete pushes the volleyball out, the assistant needs to manually clamp another volleyball onto the spiking device. This process requires the athlete to wait for a certain period of time. It cannot provide athletes with professional training scenarios such as high-intensity interval training and multi-ball continuous spiking, thus prolonging the athlete's spiking training cycle. Summary of the Invention

[0005] The purpose of this invention is to provide a volleyball training spike practice device to solve the problems mentioned in the background art.

[0006] The technical solution of the present invention is: a volleyball training spike practice device, comprising a ball delivery tube and a ball loading barrel. Two ball clamping plates are symmetrically fixed to the lower end of the ball delivery tube. The lower end of the ball loading barrel is connected to the inner side of the ball delivery tube via a ball delivery pipe. The ball loading barrel is fixed to the ground by a bracket. The device also includes an automatic ball delivery mechanism mounted on the ball delivery tube. The automatic ball delivery mechanism includes two upper guide grooves and two lower guide grooves on both sides of the ball delivery tube. Two upper stop rods are slidably connected to the inner sides of the two upper guide grooves, and two lower stop rods are slidably connected to the inner sides of the two lower guide grooves. The device also includes four gear shafts rotatably connected to both sides of the ball delivery tube. A reversing rod is fixed to the outer side of each of the four gear shafts. The upper ends of the four reversing rods are movably connected to the two ends of the two upper stop rods, and the lower ends of the four reversing rods are movably connected to the two ends of the two lower stop rods. The device also includes a shifting mechanism that drives the four reversing rods to rotate in opposite directions.

[0007] Preferably, the shifting mechanism includes four gears fixed to the outside of four gear shafts, two double-sided racks slidably disposed on both sides of the ball feeding cylinder, each of the double-sided racks meshing with two gears at corresponding positions, and a drive mechanism for driving the two double-sided racks to move up and down synchronously.

[0008] Preferably, the driving mechanism includes two pull rods fixed to the upper ends of two double-sided racks, two linkage rods rotatably connected to both sides of the ball feeding tube, and a guide tube rotatably connected to the outside of the ball feeding tube. One end of each of the two linkage rods is connected to a connecting rod, and the other end of each linkage rod is provided with a sliding groove. The upper end of each of the two pull rods is fixed with a sliding pin that is slidably adapted to the sliding groove. One end of the guide tube is slidably inserted with a sliding rod. One end of the sliding rod is rotatably connected to the connecting rod, and the other end of the sliding rod is fixed with an armature. The armature is slidably connected to the inside of the guide tube, and one end of the armature is elastically connected to the inside end of the guide tube through a return spring. An electromagnet for attracting the armature is installed on the inside end of the guide tube. The driving mechanism also includes an induction triggering mechanism disposed on the two ball clamping plates.

[0009] Preferably, the inductive triggering mechanism includes a movable clamping plate rotatably connected to one side of the ball clamping plate and a trigger switch installed on one side of the ball clamping plate. One side of the movable clamping plate is elastically connected to one side of the ball clamping plate through a clamping plate spring, and the trigger switch is electrically connected to an electromagnet.

[0010] Preferably, a V-shaped limiting groove is provided on one side of each of the two movable clamps.

[0011] Preferably, each of the four reversing rods has two sliding grooves at both ends, and the two ends of the two upper stops and the two lower stops are respectively adapted to the inner side of the sliding grooves at the corresponding positions.

[0012] Preferably, the armature has multiple ventilation holes inside.

[0013] Preferably, both of the double-sided racks have rack grooves inside, and a fixing block is fixed on the outer side of the ball feeding cylinder at the position of the two double-sided racks. The two double-sided racks are slidably sleeved on the outer side of the two fixing blocks through the rack grooves. A rack guide rod is fixed on the inner side of the two rack grooves, and the two rack guide rods are slidably connected through the interior of the two fixing blocks.

[0014] Preferably, a ball-pushing mechanism is provided on the inner side of the ball-filling barrel. The ball-pushing mechanism includes a horizontal plate fixed to the upper end of the ball-filling barrel. Two hanging rods are slidably inserted at the middle section of the horizontal plate. An armature is fixed to the lower end of the two hanging rods. An anti-blocking rod is fixed to the lower end of the armature. The anti-blocking rod is located at the axis of the ball-filling barrel. An electromagnet for attracting the armature is installed at the middle section of the lower end of the horizontal plate.

[0015] The present invention provides an improved volleyball training spike practice device, which, compared with the prior art, has the following improvements and advantages: Firstly, this invention utilizes a switching mechanism. After each spike by the athlete, the volleyball held between the two movable plates is dislodged. This mechanism allows the two upper stops to merge and the two lower stops to separate, causing the volleyball supported on the two lower stops to fall between the two movable plates. This automatic ball replenishment enables continuous spiking training, allowing athletes to focus all their energy on the spiking technique rather than auxiliary tasks such as retrieving the ball or preparing. It is particularly suitable for specialized training scenarios such as high-intensity interval training and multi-ball continuous spiking, effectively shortening the training cycle.

[0016] Secondly, this invention utilizes a ball-pushing mechanism. After each spike, the anti-blocking rod falls, clearing the ball outlet at the bottom of the ball-loading tank. This facilitates pushing any volleyball stuck at the outlet into the inner side of the ball-feeding tube, allowing the volleyball to roll smoothly through the tube into the inner side of the ball-feeding cylinder. This prevents the volleyball from becoming stuck inside the ball-loading tank and ensures that the volleyball can continuously roll into the inner side of the ball-feeding cylinder, thus guaranteeing the continuity of the ball replenishment process. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a schematic diagram of the internal structure of the ball-filling barrel in this invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B; Figure 5 This is a partially enlarged structural schematic diagram of the present invention; Figure 6 This is an enlarged structural schematic diagram of the sensing triggering mechanism in this invention; Figure 7 This is a schematic diagram of the structure of the upper and lower stop rods in the first position state in this invention; Figure 8 This is a schematic diagram of the second position state of the upper and lower stop levers in this invention.

[0019] Figure label: 1. Ball feeding tube; 2. Ball clamping plate; 3. Upper guide groove; 4. Lower guide groove; 5. Upper stop rod; 6. Lower stop rod; 7. Reversing rod; 8. Ball loading barrel; 9. Ball feeding tube; 10. Support; 11. Gear shaft; 101. Double-sided rack; 102. Gear; 104. Rack guide rod; 105. Fixing block; 201. Pull rod; 202. Linkage rod; 203. Sliding pin; 204. Guide cylinder; 205. Sliding rod; 206. Connecting rod; 207. Armature one; 208. Electromagnet one; 209. Return spring; 301. Movable clamping plate; 302. Clamping plate spring; 303. Trigger switch; 304. V-shaped limit groove; 401. Horizontal plate; 402. Hanging rod; 403. Armature two; 404. Anti-clogging rod; 405. Electromagnet two. Detailed Implementation

[0020] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides an improved volleyball training spike practice device. The technical solution of this invention is as follows: like Figures 1 to 8As shown, this embodiment of the invention provides a volleyball training spike practice device, including a ball delivery tube 1 and a ball loading tank 8. Two ball clamping plates 2 are symmetrically fixed to the lower end of the ball delivery tube 1. The lower end of the ball loading tank 8 is connected to the inner side of the ball delivery tube 1 via a ball delivery tube 9. The ball loading tank 8 is fixed to the ground by a bracket 10. The device also includes an automatic ball delivery mechanism mounted on the ball delivery tube 1. The automatic ball delivery mechanism includes two upper guide grooves 3 and two lower guide grooves 4 on both sides of the ball delivery tube 1. Two upper stop rods 5 are slidably connected to the inner sides of the two upper guide grooves 3, and two lower stop rods 6 are slidably connected to the inner sides of the two lower guide grooves 4. The device also includes four gear shafts 11 rotatably connected to both sides of the ball delivery tube 1, with a reversing rod fixed to the outer side of each of the four gear shafts 11. 7. The upper ends of the four reversing rods 7 are movably connected to the two ends of the two upper stop rods 5, and the lower ends of the four reversing rods 7 are movably connected to the two ends of the two lower stop rods 6. Two sliding grooves are opened at both ends of the four reversing rods 7. The two ends of the two upper stop rods 5 and the two lower stop rods 6 are movably adapted to the inner side of the sliding grooves at the corresponding positions. It also includes a shifting mechanism that drives the four reversing rods 7 to rotate in opposite directions. The shifting mechanism includes four gears 102 fixed on the outside of the four gear shafts 11 and two double-sided racks 101 slidably arranged on both sides of the ball feeding cylinder 1. Each double-sided rack 101 meshes with the two gears 102 at the corresponding position. It also includes a drive mechanism that drives the two double-sided racks 101 to move up and down synchronously.

[0022] Furthermore, the drive mechanism includes two pull rods 201 fixed to the upper ends of two double-sided racks 101, two linkage rods 202 rotatably connected to both sides of the ball feeding cylinder 1, and a guide cylinder 204 rotatably connected to the outside of the ball feeding cylinder 1. One end of each linkage rod 202 is connected to a connecting rod 206, and the other end of each linkage rod 202 is provided with a sliding groove. The upper end of each pull rod 201 is fixed with a sliding pin 203 that slides and adapts to the sliding groove. One end of the guide cylinder 204 is slidably inserted with... The slide rod 205 has one end rotatably connected to the connecting rod 206, and the other end of the slide rod 205 is fixed with an armature 207. The armature 207 is slidably connected to the inside of the guide cylinder 204, and one end of the armature 207 is elastically connected to the inside end of the guide cylinder 204 through a return spring 209. An electromagnet 208 for attracting the armature 207 is installed on the inside end of the guide cylinder 204. The drive mechanism also includes an induction triggering mechanism set on the two ball clamping plates 2. When electromagnet 208 is not energized, the return spring 209, under the elastic force of armature 207, pushes slide bar 205 outward. Slide bar 205, through connecting rod 206, pushes two linkage rods 202 to rotate counterclockwise synchronously by a certain angle (e.g., Figure 3As shown), the two linkage rods 202, through the sliding engagement of the two sliding pins 203 and the two sliding grooves, respectively push the two pull rods 201 and the two double-sided racks 101 to move downward; conversely, when the electromagnet 208 is energized, it drives the slide rod 205 to retract into the guide cylinder 204, thereby driving the double-sided rack 101 to move upward.

[0023] Furthermore, the induction triggering mechanism includes a movable clamping plate 301 rotatably connected to one side of the ball clamping plate 2 and a trigger switch 303 installed on one side of the ball clamping plate 2. One side of the movable clamping plate 301 is elastically connected to one side of the ball clamping plate 2 through a clamping plate spring 302, and the trigger switch 303 is electrically connected to an electromagnet 208. When the volleyball is held between the two movable clamps 301, the two movable clamps 301 can press the two trigger switches 303, thereby connecting the circuit of the electromagnet 208, and thus controlling the operation of the switching mechanism.

[0024] Furthermore, a V-shaped limiting groove 304 is provided on one side of each of the two movable clamps 301; The V-shaped limiting groove 304 is used to laterally limit the volleyball and prevent it from rolling off the sides of the two movable clamps 301.

[0025] Furthermore, the armature 1207 has multiple ventilation holes inside; The vent allows air to flow back and forth between the two ends of the inner side of the guide cylinder 204. When the armature 207 slides back and forth inside the guide cylinder 204, the resistance generated by air compression is prevented from slowing down the movement speed of the armature 207, thereby helping to improve the movement response speed of the armature 207 and thus improving the ball replenishment speed.

[0026] Furthermore, each of the two double-sided racks 101 has a rack groove inside. A fixing block 105 is fixed on the outer side of the ball feeding cylinder 1 at the position of the two double-sided racks 101. The two double-sided racks 101 are slidably sleeved on the outer side of the two fixing blocks 105 through the rack grooves. A rack guide rod 104 is fixed on the inner side of the two rack grooves. The two rack guide rods 104 are slidably connected through the interior of the two fixing blocks 105. Through the sliding fit between the rack guide rod 104 and the fixed block 105, and at the same time through the sliding fit between the rack groove and the fixed block 105, the double-sided rack 101 can move up and down in a straight line, which improves the transmission reliability and drives the two gears 102 to rotate synchronously in opposite directions.

[0027] Furthermore, a ball-pushing mechanism is provided inside the ball-filling barrel 8. The ball-pushing mechanism includes a horizontal plate 401 fixed to the upper end of the ball-filling barrel 8. Two hanging rods 402 are slidably inserted at the middle section of the horizontal plate 401. An armature 403 is fixed to the lower end of the two hanging rods 402. An anti-blocking rod 404 is fixed to the lower end of the armature 403. The anti-blocking rod 404 is located at the axis of the ball-filling barrel 8. An electromagnet 405 for attracting the armature 403 is installed at the middle section of the lower end of the horizontal plate 401. Through the action of the ball pushing mechanism, after each spike, the anti-blocking rod 404 can fall down. The falling anti-blocking rod 404 can clear the ball outlet at the lower end of the ball tank 8, making it easier to push the volleyball stuck at the outlet into the inside of the ball delivery tube 9. This allows the volleyball to smoothly roll through the ball delivery tube 9 into the inside of the ball delivery tube 1, preventing the volleyball from getting stuck inside the ball tank 8 and ensuring that the volleyball can continuously roll into the inside of the ball delivery tube 1, thus ensuring the continuity of the ball replenishment process.

[0028] Working principle: Before use, multiple volleyballs are loaded into the inside of the ball-loading barrel 8. The ball-loading barrel 8 is fixed to the training ground by the bracket 10. Under the action of gravity, the volleyballs inside the ball-loading barrel 8 slide into the upper part of the inside of the ball-loading tube 1 through the ball-feeding tube 9. Upon initial use, no volleyball is held between the two clamping plates 2, therefore the trigger switch 303 of the induction triggering mechanism is not triggered, and the electromagnet 208 of the drive mechanism is not energized. At this time, under the elastic force of the return spring 209, the armature 207 pushes the slide bar 205 outward. The slide bar 205 pushes the two linkage rods 202 to rotate counterclockwise synchronously by a certain angle through the connecting rod 206 (e.g., Figure 3 As shown), the two linkage rods 202, through the sliding engagement of the two sliding pins 203 and the two sliding grooves, respectively push the two pull rods 201 and the two double-sided racks 101 downward. When each double-sided rack 101 moves downward, it drives the two gears 102 on both sides to rotate in the opposite direction through the teeth. The simultaneous downward movement of the two double-sided racks 101 can cause the four gears 102 to rotate in the opposite direction. The four gears 102 drive the four reversing rods 7 to rotate in the opposite direction through the gear shaft 11. The upper ends of the four reversing rods 7 drive the two upper stop rods 5 on the upper side to move in the opposite direction to the middle position of the upper guide groove 3. The lower ends of the four reversing rods 7 drive the two lower stop rods 6 on the lower side to move in the opposite direction to the two ends of the lower guide groove 4, thereby causing the two upper stop rods 5 to merge and the two lower stop rods 6 to separate (as shown). Figure 8 (as shown in the state), at this time, the volleyballs inside the ball-loading barrel 8 roll down through the ball-feeding tube 9 to the inside of the ball-feeding barrel 1, located above the two upper stop rods 5 (the volleyballs that first roll down onto the two upper stop rods 5 are defined as the bottom layer volleyballs), and the two upper stop rods 5 support the bottom layer volleyballs. When spiking training is required, first hold a volleyball between the two movable clamping plates 301 of the two inductive triggering mechanisms. The two movable clamping plates 301 are squeezed by the volleyball and rotate towards one side of the two clamping plates 2, simultaneously compressing the clamping plate springs 302 until the two movable clamping plates 301 simultaneously press the two trigger switches 303 to stop, thus clamping the volleyball between the two movable clamping plates 301. It should be noted that the two trigger switches 303 are connected in series in the circuit of electromagnet 208. The circuit of electromagnet 208 is only connected when both trigger switches 303 are triggered simultaneously. When both trigger switches 303 are triggered simultaneously, electromagnet 208 is energized, generating an electromagnetic attraction force on armature 207, pulling slide rod 205 back towards the guide cylinder 204. Based on the above principle, the two double-sided racks 101 move upwards, thereby causing the two upper stop rods 5 to separate and the two lower stop rods 6 to merge. Figure 7 As shown, at this time, the lowest layer of volleyballs supported by the upper sides of the two upper stops 5 falls to the upper side of the two lower stops 6, and the volleyballs located on the inner side of the ball delivery tube 9 above the lowest layer of volleyballs roll into the inner side of the ball delivery tube 1. When an athlete spikes the ball during training, the moment the volleyball held between the two movable clamps 301 is released, multiple clamp springs 302 release their elasticity and push the two movable clamps 301 back to their original position. The two movable clamps 301 no longer press the two trigger switches 303, thereby disconnecting the circuit of electromagnet 208. Through the above principle, the two upper stop levers 5 are merged again and the two lower stop levers 6 are separated, so that the bottommost volleyball on the upper side of the two lower stop levers 6 falls freely between the two movable clamps 301. The two movable clamps 301 are impacted by the bottommost volleyball, which compresses the multiple clamp springs 302 again and triggers the two trigger switches 303. Through the switching mechanism, the two upper stop levers 5 are separated and the two lower stop levers 6 are merged, so that the volleyball on the upper layer of the bottommost volleyball falls from the upper side of the two upper stop levers 5 to the upper side of the two lower stop levers 6. Therefore, under the action of the switching mechanism, when there is no volleyball between the two movable clamps 301, the two upper stops 5 merge and the two lower stops 6 separate, so that the volleyball supported on the upper side of the two lower stops 6 can fall between the two movable clamps 301. When there is a volleyball between the two movable clamps 301, the two upper stops 5 separate and the two lower stops 6 merge, so that the volleyball on the upper side of the two upper stops 5 falls on the upper side of the two lower stops 6. When the athlete is spiking, each time the volleyball between the two movable clamps 301 is discharged, the next volleyball can immediately fall between the two movable clamps 301 to replenish it, realizing the automatic ball replenishment process. This can realize continuous spiking training, and the athlete can concentrate all their energy on the spiking technique, rather than the auxiliary links such as picking up the ball and preparing. It is especially suitable for professional training scenarios such as high-intensity interval training and multi-ball continuous spiking, effectively shortening the training cycle. To prevent the volleyball from getting stuck inside the ball-loading barrel 8, a ball-pushing mechanism is provided. Electromagnet 2 405 and electromagnet 1 208 in the ball-pushing mechanism are connected in series in the same circuit. Electromagnet 2 405 can be energized and de-energized synchronously with electromagnet 1 208. When electromagnet 2 405 is energized, it attracts armature 2 403 upward, which drives the anti-blocking rod 404 to move upward. When electromagnet 2 405 is de-energized, the anti-blocking rod 404 falls under its own weight. The anti-blocking rod 404 can clear the ball outlet at the lower end of the ball-loading barrel 8, making it easier to push the volleyball stuck at the outlet into the inside of the ball-feeding tube 9, so that the volleyball can smoothly roll down through the ball-feeding tube 9 into the inside of the ball-feeding cylinder 1.

[0029] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A volleyball training spike practice device, comprising a ball delivery tube (1) and a ball-loading bucket (8), wherein two ball-clamping plates (2) are symmetrically fixed to the lower end of the ball delivery tube (1), and the lower end of the ball-loading bucket (8) is connected to the inner side of the ball delivery tube (1) through a ball delivery pipe (9), and the ball-loading bucket (8) is fixed to the ground by a bracket (10), characterized in that, It also includes an automatic ball feeding mechanism installed on the ball feeding tube (1); The automatic ball feeding mechanism includes two upper guide grooves (3) and two lower guide grooves (4) on both sides of the ball feeding cylinder (1). Two upper stop rods (5) are slidably connected to the inner side of the two upper guide grooves (3), and two lower stop rods (6) are slidably connected to the inner side of the two lower guide grooves (4). It also includes four gear shafts (11) rotatably connected to both sides of the ball feeding cylinder (1). A reversing rod (7) is fixed to the outer side of each of the four gear shafts (11). The upper ends of the four reversing rods (7) are movably connected to the two ends of the two upper stop rods (5), and the lower ends of the four reversing rods (7) are movably connected to the two ends of the two lower stop rods (6). It also includes a shifting mechanism that drives the four reversing rods (7) to rotate in opposite directions.

2. The volleyball training spike practice device according to claim 1, characterized in that: The shifting mechanism includes four gears (102) fixed on the outside of four gear shafts (11), two double-sided racks (101) slidably disposed on both sides of the ball feeding cylinder (1), each of the double-sided racks (101) meshing with the two gears (102) at the corresponding position, and also includes a drive mechanism that drives the two double-sided racks (101) to move up and down synchronously.

3. The volleyball training spike practice device according to claim 2, characterized in that: The driving mechanism includes two pull rods (201) fixed to the upper ends of two double-sided racks (101), two linkage rods (202) rotatably connected to both sides of the ball feeding cylinder (1), and a guide cylinder (204) rotatably connected to the outside of the ball feeding cylinder (1). One end of each linkage rod (202) is connected to a connecting rod (206), and the other end of each linkage rod (202) is provided with a sliding groove. The upper ends of each pull rod (201) are fixed with sliding pins (203) that are slidably adapted to the sliding grooves. One end of the guide cylinder (204) is slidably inserted with a sliding rod (206). 05), one end of the slide rod (205) is rotatably connected to the connecting rod (206), and the other end of the slide rod (205) is fixed with an armature (207). The armature (207) is slidably connected to the inner side of the guide cylinder (204), and one end of the armature (207) is elastically connected to the inner end of the guide cylinder (204) through a reset spring (209). An electromagnet (208) for attracting the armature (207) is installed on the inner end of the guide cylinder (204). The driving mechanism also includes an induction triggering mechanism set on the two ball clamping plates (2).

4. The volleyball training spike practice device according to claim 3, characterized in that: The induction triggering mechanism includes a movable clamping plate (301) rotatably connected to one side of the ball clamping plate (2) and a trigger switch (303) installed on one side of the ball clamping plate (2). One side of the movable clamping plate (301) is elastically connected to one side of the ball clamping plate (2) through a clamping plate spring (302). The trigger switch (303) is electrically connected to an electromagnet (208).

5. A volleyball training spike practice device according to claim 4, characterized in that: V-shaped limiting grooves (304) are provided on one side of both of the movable clamps (301).

6. A volleyball training spike practice device according to claim 4, characterized in that: Two sliding grooves are provided at both ends of the four reversing rods (7), and the two upper stop rods (5) and the two lower stop rods (6) are respectively adapted to the inner side of the sliding grooves at the corresponding positions.

7. A volleyball training spike practice device according to claim 3, characterized in that: The armature (207) has multiple ventilation holes inside.

8. A volleyball training spike practice device according to claim 2, characterized in that: Both of the double-sided racks (101) have rack grooves inside. The outer side of the ball feeding cylinder (1) is fixed with a fixing block (105) at the position of the two double-sided racks (101). The two double-sided racks (101) are slidably sleeved on the outer side of the two fixing blocks (105) through the rack grooves. The inner side of the two rack grooves is fixed with rack guide rods (104). The two rack guide rods (104) are slidably connected through the interior of the two fixing blocks (105).

9. A volleyball training spike practice device according to claim 1, characterized in that: The ball-loading barrel (8) is provided with a ball-pushing mechanism. The ball-pushing mechanism includes a horizontal plate (401) fixed to the upper end of the ball-loading barrel (8). Two hanging rods (402) are slidably inserted at the middle section of the horizontal plate (401). An armature (403) is fixed at the lower end of the two hanging rods (402). An anti-blocking rod (404) is fixed at the lower end of the armature (403). The anti-blocking rod (404) is located at the axis of the ball-loading barrel (8). An electromagnet (405) for attracting the armature (403) is installed at the middle section of the lower end of the horizontal plate (401).

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