A volleyball training machine

Abstract

The utility model provides a volleyball training machine, including gather ball frame, send ball frame, ball bouncing device and controller, gather ball frame includes the gather ball hopper that is erected, and the one end of send ball frame is hinged and is installed at the ball falling mouth of gather ball hopper bottom end place, the other end of send ball frame has the send ball control frame of sliding installation, and send ball frame is fixedly installed with first linear driver for driving send ball control frame sliding, ball bouncing device includes ball bouncing device and support frame, and the upper and lower sides of ball bouncing device are hinged with send ball frame and support frame respectively, and the second linear driver is hinged and is installed on support frame, and the output of second linear driver is hinged with ball bouncing device, the device moves through control first linear driver and drives send ball control frame, realizes the interval of volleyball and falls, can accurate simulation in the different rhythm of competition, the pitch angle of ball bouncing device in ball bouncing device can be adjusted flexibly through second linear driver, and azimuth angle is adjusted through electric rotary wheel, greatly enriches the angle range of ball bouncing.

Description

Technical Field

[0001] This utility model relates to the field of volleyball training equipment technology, and in particular to a volleyball training machine. Background Technology

[0002] Throughout the development of volleyball training, the effectiveness of training equipment has always been a key factor affecting training quality. Early volleyball training machines could not precisely control the ball's drop interval in their ball delivery mechanism. This made it difficult for athletes to adapt to the varied rhythm of incoming balls in a match, significantly reducing training effectiveness. For example, in training scenarios simulating fast attack tactics, the inability to precisely control the ball delivery interval made it difficult for athletes to practice effective continuous hitting.

[0003] Traditional training machines also perform poorly in terms of ball angle adjustment. Previous equipment had fixed ball angles or extremely limited adjustment ranges, making it difficult to simulate the complex scenarios of volleyballs flying from different heights and angles in real matches. The competitive and unpredictable nature of volleyball matches means that athletes need to be able to deal with various incoming balls. However, fixed-angle ball training prevents athletes from fully developing their reaction ability and hitting skills during training. In actual matches, when facing balls coming from different angles, they often find it difficult to deal with them effectively due to a lack of corresponding training, which greatly limits the improvement of training results.

[0004] With the continuous development of volleyball, the requirements for training equipment are increasing. In order to enable athletes to better simulate real combat scenarios during training and improve their ability to deal with different incoming balls, it is urgent to develop a training machine that can flexibly adjust the angle of the ball bounce and realize the interval of ball delivery. Utility Model Content

[0005] The purpose of this invention is to provide a volleyball training machine that can adjust the pitch angle of the ball feeder and achieve intelligent adjustment of the ball delivery interval.

[0006] This utility model provides a volleyball training machine, including a ball collecting frame, a ball feeding frame, a ball bouncing device, and a controller. The ball collecting frame includes a ball collecting hopper, and one end of the ball feeding frame is hinged to the ball receiving port at the bottom of the ball collecting hopper. A ball feeding control frame is slidably mounted on the end of the ball feeding frame near the ball receiving end of the ball bouncing device. A first linear actuator for driving the ball feeding control frame to slide is fixedly mounted on the ball feeding frame. The ball bouncing device includes a ball bouncing device and a support frame. The bottom end of the ball feeding frame is hinged to the top end of the ball bouncing device, and the bottom end of the ball bouncing device is hinged to the top end of the support frame. A second linear actuator is hinged to the support frame, and the output end of the second linear actuator is hinged to the bottom of the non-receiving end of the ball bouncing device. The first linear actuator, the second linear actuator, and the ball bouncing device are all electrically connected to the controller.

[0007] Furthermore, the ball collecting rack also includes a first movable seat and a first sleeve frame. The first movable seat is provided with casters at each corner of its bottom end. The first sleeve frame includes an outer sleeve assembly and an inner sleeve assembly that are fixedly connected. The top of the first movable seat is provided with a first adjusting sleeve rod that engages with the outer sleeve assembly. The bottom of the ball collecting hopper is provided with at least three second adjusting sleeve rods that engage with the inner sleeve assembly. Both the first adjusting sleeve rod and the second adjusting sleeve rod are provided with multiple adjusting holes at equal intervals along the axial direction. The first adjusting sleeve rod and the outer sleeve assembly, as well as the second adjusting sleeve rod and the inner sleeve assembly, are connected by pins.

[0008] Furthermore, the ball feeding frame also includes a ball guide frame, and the ball feeding control frame is slidably mounted on the ball guide frame in a direction perpendicular to the ball guide frame. The end of the ball guide frame away from the ball feeding control frame is hinged to the ball drop opening at the bottom of the ball collecting hopper. The first linear driver is fixedly mounted on the ball guide frame below the ball feeding control frame, and the output end of the first linear driver is fixedly connected to the bottom end of the ball feeding control frame.

[0009] Furthermore, a fall-prevention guardrail is fixedly installed on the ball guide frame near the ball delivery control frame.

[0010] Furthermore, a first ball-stopping rod is provided at the top of the front interior of the ball-feeding control frame, and a second ball-stopping rod is provided at the bottom of the rear interior of the ball-feeding control frame. The longitudinal distance between the first ball-stopping rod and the second ball-stopping rod is less than the diameter of the ball.

[0011] Furthermore, the ball launcher includes a ball launcher frame, the front end of which is a ball receiving part. A ball launcher rod is slidably installed at the center of the ball launcher frame. A compression spring sleeve is fixedly installed inside the ball launcher frame at one end away from the ball receiving part. A compression spring is provided at the bottom end of the compression spring sleeve. The ball launcher rod is telescopically slidably connected to the compression spring sleeve. Third linear actuators are symmetrically fixedly installed on both sides of the ball launcher rod on the ball launcher frame. A pull ring is sleeved on the outer side of the ball launcher rod. The two sides of the pull ring are fixedly connected to the output ends of the two third linear actuators respectively. A stop bar is provided on the ball launcher rod. A ball launcher trigger is installed inside the ball launcher frame. A bayonet is provided on the ball launcher rod for insertion and engagement with the ball launcher trigger. Both the third linear actuators and the ball launcher trigger are electrically connected to the controller.

[0012] Furthermore, a stop groove is provided at the bottom end of the compression spring sleeve, and an adjustment handle is provided on the outside of the compression spring sleeve at the stop groove, with the compression spring abutting against the adjustment handle.

[0013] Furthermore, the support frame includes a second movable seat and a second sleeve frame. The top end of the second movable seat is provided with a second adjusting sleeve rod that cooperates with the second sleeve frame. The second adjusting sleeve rod and the second sleeve frame are connected by a spring pin.

[0014] Furthermore, a roller bracket is rotatably mounted on the bottom end of one side of the second movable seat, and an electric rotating wheel is rotatably mounted on the bottom end of the roller bracket, the electric rotating wheel being electrically connected to the controller.

[0015] Furthermore, the first linear actuator, the second linear actuator, and the third linear actuator are all electrically operated telescopic rods.

[0016] The beneficial effects of this technical solution are as follows: This volleyball training machine controls the first linear drive to drive the ball delivery control frame to move, realizing the interval drop of the volleyball, which can accurately simulate different rhythms in the game; at the same time, the pitch angle of the ball dropper in the ball dropper device can be flexibly adjusted by the second linear drive, which greatly enriches the angle range of the ball dropper, provides athletes with a training environment that is closer to actual combat, effectively makes up for the shortcomings of traditional training equipment, and significantly improves the training effect and the athletes' competitive level. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0020] Figure 3 for Figure 2 Enlarged view of the structure at point B.

[0021] Figure 4 This is a schematic diagram of the overall structure of the ball-launching device of this utility model.

[0022] Figure 5 for Figure 4 Enlarged view of the structure at point C.

[0023] Explanation of reference numerals in the attached drawings: 1-First movable seat, 2-First sleeve frame, 201-Outer sleeve assembly, 202-Inner sleeve assembly, 3-Ball collecting hopper, 4-Second adjusting sleeve rod, 5-Ball guide frame, 501-Anti-drop guardrail, 6-Ball delivery control frame, 601-First ball stop rod, 602-Second ball stop rod, 7-Ball launcher, 701-Ball receiving part, 702-Compression spring sleeve, 703-Ejection top rod, 704-Compression spring, 705-Linkage frame, 706-Brake handle, 8-Support frame, 801-Second movable seat, 802-Second sleeve frame, 9-First linear actuator, 10-Support tube, 11-Second linear actuator, 12-Third linear actuator, 13-Pull ring, 14-Stop rod, 15-Buffer spring, 16-Gear slot, 17-Adjusting handle, 18-Electric rotary wheel, 19-Rotating tube. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] like Figures 1-5 As shown, this utility model provides a volleyball training machine, including a ball collecting frame, a ball feeding frame, a ball bouncing device, and a controller. The ball collecting frame includes a first movable seat 1, a first sleeve frame 2, and a ball collecting bucket 3. Each corner of the bottom end of the first movable seat 1 is provided with a caster wheel. The first sleeve frame 2 includes an outer sleeve assembly 201 and an inner sleeve assembly 202 that are fixedly connected. The top end of the first movable seat 1 is provided with a first adjusting sleeve rod that fits into the outer sleeve assembly 201. The bottom end of the ball collecting bucket 3 is provided with at least three second adjusting sleeve rods 4 that fit into the inner sleeve assembly 202. The three second adjusting sleeve rods 4 are arranged to form an isosceles triangle structure. Both the first adjusting sleeve rod and the second adjusting sleeve rod 4 are provided with multiple adjusting holes at equal intervals along the axial direction. The first adjusting sleeve rod and the outer sleeve are connected by pins, and the second adjusting sleeve rod 4 and the inner sleeve are connected by pins. The ball collecting frame can be raised and lowered by adjusting the first adjusting sleeve rod and the second adjusting sleeve rod 4.

[0029] One end of the ball feeder is hinged to the ball inlet at the bottom of the ball collecting hopper 3. The ball feeder includes a ball guide frame 5. A ball feed control frame 6 is slidably mounted on the end of the ball feeder near the ball receiving end of the ball bouncing device. A first linear actuator 9 for driving the ball feed control frame 6 to slide is fixedly mounted on the ball feeder. The ball feed control frame 6 is slidably mounted on the ball guide frame 5 in a direction perpendicular to the ball guide frame 5. The end of the ball guide frame 5 away from the ball feed control frame 6 is hinged to the ball inlet at the bottom of the ball collecting hopper 3. The first linear actuator 9 is fixedly mounted on the ball guide frame 5 below the ball feed control frame 6. The output end of the first linear actuator 9 is connected to the ball feed control frame 6. The bottom of the frame 6 is fixedly connected, and the volleyball drop is controlled by the first linear actuator 9. To achieve the staggered drop of multiple volleyballs, a first stop rod 601 is provided at the top of the front interior of the ball delivery control frame 6, and a second stop rod 602 is provided at the bottom of the rear interior of the ball delivery control frame 6. The longitudinal distance between the first stop rod 601 and the second stop rod 602 is less than the diameter of the volleyball. As the ball delivery control frame 6 rises, the second stop rod 602 first inserts between the two foremost volleyballs, blocking the second volleyball, and then rises until the first stop rod 601 disengages from the volleyball, at which point the volleyball falls under gravity. To prevent the second stop rod 602 from knocking down the volleyball waiting in the waiting position during the rise, an anti-drop guardrail 501 is fixedly installed on the ball guide frame 5 near the ball delivery control frame 6 to prevent the volleyball from falling.

[0030] The ball-pinning device includes a ball-pinner 7 and a support frame 8. The bottom end of the ball guide frame 5 is hinged to the top end of the ball-pinner 7, and the bottom end of the ball-pinner 7 is hinged to the top end of the support frame 8. A second linear driver 11 is hingedly mounted on the support frame 8. The output end of the second linear driver 11 is hinged to the bottom of the non-ball-receiving end of the ball-pinner 7. The first linear driver 9, the second linear driver 11, and the ball-pinner 7 are all electrically connected to the controller. The ball launcher 7 includes a ball launching frame, with a ball receiving part 701 at the front end of the frame. A launching rod 703 is slidably mounted at the center of the frame. A spring sleeve 702 is fixedly mounted inside the frame at the end furthest from the ball receiving part 701. A spring 704 is located at the bottom of the spring sleeve 702. The launching rod 703 is slidably connected to the spring sleeve 702. Third linear actuators 12 are symmetrically fixedly mounted on both sides of the launching rod 703 on the frame to balance the force on both sides of the launching rod 703. A pull ring 13 is fitted on the outer side of the ejector rod 703. The inner diameter of the pull ring 13 is larger than the outer diameter of the ejector rod 703. The two sides of the pull ring 13 are fixedly connected to the output ends of the two third linear actuators 12 respectively. A stop bar 14 is provided on the ejector rod 703. When the third linear actuator 12 pulls the pull ring 13, the pull ring 13 can drive the ejector rod 703 to move under the action of the stop bar 14, so that it compresses the compression spring 704. The compression spring is compressed and stores elastic potential energy. Ejection triggers are symmetrically installed inside the ejector frame. The ejector rod 703 has a corresponding ejection trigger. The corresponding ejector frame has symmetrically installed brake levers 706 on both sides, each corresponding to one ejector trigger. Two linkage brackets 705 are symmetrically installed on both sides of the pull ring 13, and these brackets move with the pull ring 13. The third linear actuator 12 and the ejector triggers are electrically connected to the controller. When the ejector rod 703 is moved by the pull ring 13, causing the latch on the ejector rod 703 to move to the ejector trigger position, the ejector trigger will lock the ejector rod 703. At this time, the compression spring is compressed, and the ejector rod 703... Before release, the pull ring 13 needs to be reset by controlling the third linear drive 12 to avoid the ball not bouncing. After the pull ring 13 is reset, the linkage frame 705 presses the brake handle 706 to make the ejection trigger disengage from the latch. Under the action of the compression spring, the ejection rod 703 pops out, thereby hitting the volleyball located in the receiving part 701. In order to buffer the ejection rod 703, a buffer spring 15 is sleeved on the outside of the ejection rod 703 on the ejection frame to avoid violent impact between the stop bar and the ejection frame during the ejection process.

[0031] To achieve different striking forces, a stop groove 16 is provided at the bottom of the spring sleeve 702. An adjustment handle 17 is provided on the outside of the spring sleeve 702 at the stop groove 16. The stop groove 16 is provided with stops for different launching forces. The spring abuts against the adjustment handle 17. By adjusting the fixed position of the adjustment handle 17 in the stop groove 16, the adjustment handle 17 drives the spring to move inside the spring sleeve 702. With the stroke of the launching rod 703 fixed, different launching forces of the launching rod 703 can be achieved by changing the position of the bottom of the spring.

[0032] The support frame 8 includes a second movable seat 801 and a second sleeve frame 802. The bottom of the second movable seat 801 is also equipped with casters at each corner. The top of the second movable seat 801 is equipped with a second adjusting sleeve rod 4 that is fitted into the second sleeve frame 802. The second adjusting sleeve rod 4 is connected to the second sleeve frame 802 by a spring pin. The sleeve frame can be height adjusted, thereby changing the landing point of the volleyball.

[0033] A roller bracket is rotatably mounted on the bottom of one side of the second movable seat 801. An electric rotating wheel 18 is rotatably mounted on the bottom of the roller bracket. The electric rotating wheel 18 is electrically connected to a controller. The controller controls the movement of the electric rotating wheel 18, which enables the movement of the entire support frame 8. The roller bracket includes a rotating tube 19 and a support tube 10. The rotating tube 19 is rotatably mounted on the second movable seat 801, and multiple adjustment holes are provided on the rotating tube 19 along the circumference to facilitate the overall folding of the roller bracket when not in use. The support tube 10 is slidably sleeved on the rotating tube 19. The electric rotating wheel 18 is mounted on the bottom of the support tube 10, and a spring is sleeved on the outside of the support tube 10. The upper and lower ends of the spring abut against the support tube 10 and the rotating tube 19, respectively, to provide support force for the electric rotating wheel 18.

[0034] In this embodiment, the first linear actuator 9, the second linear actuator 11, and the third linear actuator 12 are all electric telescopic rods, and are all coordinated and controlled by the controller.

[0035] Example 2

[0036] The difference between this embodiment and Embodiment 1 is that, considering that the volleyball may not slide forward as normal due to various reasons such as poor roundness or insufficient tilt of the slide rail, causing the first ball-blocking rod 601 or the second ball-blocking rod 602 to press directly against the volleyball, which may cause damage to the device or the volleyball, both ball-blocking rods adopt a retractable elastic push rod method. The ball-blocking rod is slidably installed on the ball-feeding control frame 6 along the vertical direction. A tension spring is connected between the end of the ball-blocking rod and the ball-feeding control frame 6 to provide a rebound force for the ball-blocking rod. The ball-blocking rod can retract on its own under greater pressure to avoid damage to the volleyball or the device.

[0037] Working principle

[0038] The volleyball launching process is as follows: The controller of the training machine is set to four consecutive processes in one cycle: Process A: triggering and launching the ball; Process B: spring compression; Process C: reset; Process D: delay and waiting. In Process A, the controller initiates the launching process, controlling the launch trigger to disengage from the latch. Under the action of the spring, the launch rod 703 is launched, thus launching the volleyball located at the receiving part 701. In Process B, the two third linear actuators 12 retract, and the pull ring pulls the stop lever 14 on the launch rod, compressing the spring until the trigger locks the latch on the launch rod 703. In Process C, the third linear actuator 12 drives the pull ring 13 back to the standby position before the trigger is triggered. In Process D, the third linear actuator 12 remains stationary in the standby position for a set time delay. This process adjusts the total time of a single cycle, that is, the launching time interval between two volleyballs. This completes one ABCD launching cycle.

[0039] If using a single-cycle launcher, the user can hold the remote control and press the single launch button. If using a continuous automatic launcher, pressing the continuous launch button on the remote control will launch the volleyball continuously at the set time intervals.

[0040] The trainer's catapult can rotate approximately 80 degrees vertically and horizontally, providing omnidirectional ball launching capabilities, including three-dimensional ball positioning and the ability to launch the ball in four directions. It can simulate a player's basic volleyball skills: passing, serving, and spiking. With this multi-functional trainer, players can practice six volleyball techniques: spiking, receiving a normal serve, receiving a powerful serve, setting, passing in hard volleyball or holding the ball in air volleyball, and blocking.

[0041] In order to prevent damage to components that may be caused by the operation of various electric devices of the training machine under overload, an overcurrent protector is installed at the power supply end of the controller. Once the operating current of the whole machine exceeds 20% of the normal operating current, the overcurrent protector will automatically cut off the power supply. After that, manual inspection and repair are required before restarting.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A volleyball training machine, characterized in that, The device includes a ball collecting frame, a ball feeding frame, a ball bouncing device, and a controller. The ball collecting frame includes a ball collecting hopper, and one end of the ball feeding frame is hinged to the ball receiving port at the bottom of the ball collecting hopper. A ball feeding control frame is slidably mounted on the end of the ball feeding frame near the ball receiving part of the ball bouncing device, and a first linear actuator for driving the ball feeding control frame to slide is fixedly mounted on the ball feeding frame. The ball bouncing device includes a ball bouncing device and a support frame. The bottom end of the ball feeding frame is hinged to the top end of the ball bouncing device, and the bottom end of the ball bouncing device is hinged to the top end of the support frame. A second linear actuator is hinged to the support frame, and the output end of the second linear actuator is hinged to the bottom of the non-ball receiving end of the ball bouncing device. The first linear actuator, the second linear actuator, and the ball bouncing device are all electrically connected to the controller.

2. The volleyball training machine according to claim 1, characterized in that, The ball collecting rack also includes a first movable seat and a first sleeve frame. The first movable seat is equipped with casters at each corner of its bottom end. The first sleeve frame includes an outer sleeve assembly and an inner sleeve assembly that are fixedly connected. The top of the first movable seat is provided with a first adjusting rod that fits into the outer sleeve assembly. The bottom of the ball collecting bucket is provided with at least three second adjusting rods that fit into the inner sleeve assembly. Both the first adjusting rod and the second adjusting rod are provided with multiple adjusting holes at equal intervals along the axial direction. The first adjusting rod and the outer sleeve assembly, as well as the second adjusting rod and the inner sleeve assembly, are connected by pins.

3. The volleyball training machine according to claim 1, characterized in that, The ball feeding frame also includes a ball guide frame. The ball feeding control frame is slidably mounted on the ball guide frame in a direction perpendicular to the ball guide frame. The end of the ball guide frame away from the ball feeding control frame is hinged to the ball drop opening at the bottom of the ball collecting hopper. The first linear driver is fixedly mounted on the ball guide frame below the ball feeding control frame. The output end of the first linear driver is fixedly connected to the bottom end of the ball feeding control frame.

4. The volleyball training machine according to claim 3, characterized in that, A fall-prevention guardrail is fixedly installed on the ball guide frame near the ball delivery control frame.

5. The volleyball training machine according to claim 1, characterized in that, The ball feeding control frame has a first ball-blocking rod at the top of the front side interior and a second ball-blocking rod at the bottom of the rear side interior. The longitudinal distance between the first ball-blocking rod and the second ball-blocking rod is less than the diameter of the ball.

6. The volleyball training machine according to claim 1, characterized in that, The ball launcher includes a ball launcher frame, with a ball receiving section at the front end of the frame. A launch rod is slidably mounted at the center of the frame. A spring sleeve is fixedly mounted inside the frame at the end furthest from the ball receiving section, with a spring at the bottom of the sleeve. The launch rod is slidably connected to the spring sleeve. Third linear actuators are symmetrically fixedly mounted on both sides of the launch rod on the frame. Pull rings are fitted on the outer side of the launch rod, with each pull ring fixedly connected to the output ends of two third linear actuators. A stop bar is provided on the launch rod. A launch trigger is installed inside the frame, and a slot for engaging the trigger is provided on the launch rod. Both the third linear actuators and the trigger are electrically connected to the controller.

7. The volleyball training machine according to claim 6, characterized in that, A stop groove is provided at the bottom end of the compression spring sleeve, and an adjustment handle is provided on the outside of the compression spring sleeve at the stop groove. The compression spring abuts against the adjustment handle.

8. The volleyball training machine according to claim 1, characterized in that, The support frame includes a second movable seat and a second sleeve frame. The top of the second movable seat is provided with a second adjusting sleeve rod that cooperates with the second sleeve frame. The second adjusting sleeve rod and the second sleeve frame are connected by a spring pin.

9. The volleyball training machine according to claim 8, characterized in that, A roller bracket is rotatably mounted on the bottom end of one side of the second movable seat, and an electric rotating wheel is rotatably mounted on the bottom end of the roller bracket. The electric rotating wheel is electrically connected to the controller.

10. The volleyball training machine according to claim 6, characterized in that, The first linear actuator, the second linear actuator, and the third linear actuator are all electrically operated telescopic rods.

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