Volleyball serving device for volleyball training

Abstract

The present invention belongs to the technical field of training equipment. Disclosed is a volleyball serving device for volleyball training. The volleyball serving device comprises a fixing base, wherein a bottom plate is rotationally connected to the fixing base, a ball storage mechanism and a ball serving mechanism are provided on the bottom plate, and the ball storage mechanism is in communication with the ball serving mechanism; the ball serving mechanism comprises a ball serving tube arranged on the fixing base, and a side wall of the ball serving tube is in communication with an outlet in the bottom end of the ball storage mechanism; a ball serving assembly for ejecting volleyballs is provided in an inner cavity of the ball serving tube; the ball serving assembly comprises a ball pushing plate movably connected in the ball serving tube, and the ball pushing plate is drivingly connected to a driving assembly arranged in the ball serving tube; and the driving assembly comprises a driving shaft arranged on a side wall of the ball serving tube, a driving block is drivingly connected to the driving shaft, and the driving block is embedded in and fixedly connected to the ball pushing plate. The present invention has a simple structure, is convenient to use, and can randomly provide different ball serving states according to the design, thereby improving the simulation of ball serving authenticity, and improving the training effect.

Description

A volleyball serving device for volleyball training TECHNICAL FIELD

[0001] The present application belongs to the technical field of training equipment, and particularly relates to a volleyball serving device for volleyball training. BACKGROUND

[0002] Ball receiving training is an important training method for volleyball, but in volleyball training, the effect of a single training is poor, and important ball receiving and serving training cannot be carried out. At least one person serves to cooperate with the athlete for training. In order to liberate the server, a volleyball serving device emerges as the times require, which realizes automatic serving of the volleyball to assist the athlete in training.

[0003] However, the existing volleyball serving device training is relatively single, and the variability is poor. The training effect is limited, and the training effect of the quick reaction ability and instantaneous judgment ability of the athlete is very small. The actual training effect will be greatly discounted.

[0004] Therefore, the present application designs a volleyball serving device for volleyball training to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a volleyball serving device for volleyball training.

[0006] To achieve the above purpose, the present application provides a volleyball serving device for volleyball training, which comprises a fixed seat, a bottom plate rotatably connected to the fixed seat, a ball storage mechanism and a serving mechanism arranged on the bottom plate, and the ball storage mechanism is communicated with the serving mechanism;

[0007] The serving mechanism comprises a serving pipe arranged on the fixed seat, the side wall of the serving pipe is communicated with the outlet at the bottom end of the ball storage mechanism, and the inner cavity of the serving pipe is provided with a serving assembly for popping out the volleyball;

[0008] The serving assembly comprises a ball pushing plate movably connected in the serving pipe, and the ball pushing plate is drivingly connected with a driving assembly arranged in the serving pipe.

[0009] The driving assembly comprises a driving shaft arranged on the side wall of the serving pipe, a driving block drivingly connected to the driving shaft, and the driving block is embedded and fixed on the ball pushing plate.

[0010] Preferably, a plurality of transmission grooves are formed in the side wall of the driving shaft, a transmission block is movably connected in the transmission groove, and one end of the transmission block extends out of the transmission groove and is drivingly connected with the driving block.

[0011] Preferably, the inner cavity of the drive shaft is movably connected with a control rod, the outer wall of the control rod is fixedly connected with a plurality of arc-shaped driving blocks, the end of the transmission block is fixedly connected with a plurality of driven blocks, and the driving block is in contact with the driven block.

[0012] Preferably, one end of the control rod is fixedly connected with a permanent magnet, the inner cavity of the drive shaft is provided with an electromagnet corresponding to the permanent magnet, the electromagnet is in suction with the permanent magnet, and the two ends of the inner cavity of the drive shaft and the two ends of the control rod are respectively fixedly connected with return springs.

[0013] Preferably, the ball storage mechanism comprises a mounting seat fixedly connected to the bottom plate, and the top end of the mounting seat is provided with a ball storage box with an open top end; a transfer cavity in communication with the inner cavity of the ball storage box is arranged in the mounting seat, the outlet of the transfer cavity is communicated with a ball conveying pipe obliquely arranged towards the ball launching pipe, one end of the ball conveying pipe away from the mounting seat is rotatably connected with a ball inlet arranged on the side wall of the ball launching pipe, and a control valve for controlling the entry and exit of the ball is arranged in the ball conveying pipe.

[0014] Preferably, the control valve comprises a valve body arranged at the bottom end of the ball conveying pipe, a limiting rod is fixedly connected in the valve body, a valve plate is slidably connected on the limiting rod, and the valve plate extends into the ball conveying pipe; a pop-up spring is fixedly connected between the valve plate and the bottom end of the inner cavity of the valve body, and the pop-up spring is sleeved on the outside of the limiting rod.

[0015] Preferably, a guide rail is arranged on the bottom plate, a guide slide is formed in the guide rail, a guide rod is fixedly arranged on the side wall of the ball launching pipe, the guide rod extends into the guide rail and is in meshing connection with the guide rail, and the end of the guide rod is in transmission connection with a guide motor slidably connected on the side wall of the guide rail.

[0016] Preferably, the guide rod comprises a fixed rod fixedly connected to the side wall of the ball launching pipe, an active rod is rotatably connected to the end of the fixed rod, a driving gear is sleeved on the active rod, the driving gear is in meshing connection with a guide rack in the guide slide, and the output shaft of the guide motor is in transmission connection with the end of the active rod.

[0017] Preferably, a limiting groove is formed in the bottom plate, a limiting sliding cylinder is slidably connected in the limiting groove, a supporting rod is slidably connected in the limiting sliding cylinder, the top end of the supporting rod is hingedly connected with the bottom end of the ball launching pipe, and an adaptive spring is fixedly connected between the bottom end of the supporting rod and the inner cavity of the limiting sliding cylinder.

[0018] Preferably, a plurality of supporting legs are fixedly connected to the bottom end of the fixed seat, a lifting groove is formed in the bottom end of the supporting leg, a lifting rod is fixedly connected in the lifting groove, the bottom end of the lifting rod is fixedly connected with a lifting plate, and a plurality of walking wheels are arranged on the bottom end of the lifting plate.

[0019] Compared with the prior art, the volleyball serving device for volleyball training has the advantages and technical effects that the volleyball serving device for volleyball training is mainly used for launching volleyballs and assisting in volleyball training; when in use, the bottom plate rotatably connected to the fixed seat drives the ball storage mechanism and the serving mechanism to rotate to launch volleyballs in various directions, and the applicability is better; the serving pipe of the serving mechanism can be deflected on the bottom plate to control the angle of serving, and is suitable for different volleyball training; the serving assembly in the serving pipe can provide different force thrusts to the volleyballs, so that the volleyballs can be served according to different angles and forces, and thus the volleyball serving device is suitable for different auxiliary training requirements; the driving shafts of the serving assembly drive the ball pushing plates to move, and when launching, different launching forces are provided through different initial positions of the launching plates, so that the volleyball activity is more realistically simulated, the ball receiving and hitting capabilities of athletes are trained, the applicability is improved, and the training effect is improved.

[0020] The volleyball serving device for volleyball training has the advantages that the structure is simple, the use is convenient, different serving states can be randomly provided according to design, the serving reality is improved, and the training effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application and are incorporated herein in their entirety. The embodiments illustrated in the drawings are utilized to explain and describe this present application and are not intended to be an undue limitation thereon. In the drawings:

[0022] FIG. 1 is an axial view of the volleyball serving device for volleyball training according to the present application;

[0023] FIG. 2 is a front view of the volleyball serving device for volleyball training according to the present application;

[0024] FIG. 3 is an enlarged view of portion A in FIG. 2 according to the present application;

[0025] FIG. 4 is a schematic view of the fixed rod structure according to the present application;

[0026] FIG. 5 is a schematic view of the ball launching pipe structure according to the present application;

[0027] FIG. 6 is an enlarged view of portion B in FIG. 5 according to the present application;

[0028] FIG. 7 is a schematic view of the serving pipe structure according to the present application;

[0029] FIG. 8 is an enlarged view of portion C in FIG. 7 according to the present application;

[0030] FIG. 9 is a top view of the ball pushing plate structure according to the present application;

[0031] FIG. 10 is a schematic view of the driving shaft structure according to the present application;

[0032] FIG. 11 is a sectional view of the driving shaft according to the present application;

[0033] Fig. 12 is a schematic view of the support leg structure of the present application;

[0034] Fig. 13 is an enlarged view of D in Fig. 11 of the present application;

[0035] In the figure: 1, fixed seat; 2, bottom plate; 3, ball launching tube; 4, ball pushing plate; 5, pushing spring; 6, drive shaft; 7, drive block; 8, drive motor; 9, limiting block; 10, limiting groove; 11, transmission groove; 12, transmission block; 13, control lever; 14, driving block; 15, driven block; 16, permanent magnet; 17, electromagnet; 18, return spring; 19, mounting seat; 20, ball storage box; 21, transfer cavity; 22, ball transfer tube; 23, ball inlet; 24, control valve; 25, valve body; 26, limiting rod; 27, valve plate; 28, ejection spring; 29, guide rail; 30, guide slide; 31, guide rod; 32, guide motor; 33, fixed rod; 34, movable rod; 35, connecting bearing; 36, driving gear; 37, guide rack; 38, limiting groove; 39, limiting slide cylinder; 40, support rod; 41, adaptive spring; 42, support leg; 43, lifting groove; 44, lifting rod; 45, lifting plate; 46, walking wheel; 47, non-slip pad; 48, positioning block; 49, elastic rope. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0038] Referring to Figs. 1-13, the present embodiment provides a volleyball launching device for volleyball training, which comprises a fixed seat 1, the fixed seat 1 is rotatably connected with a bottom plate 2, the bottom plate 2 is provided with a ball storage mechanism and a ball launching mechanism, the ball storage mechanism is communicated with the ball launching mechanism;

[0039] The ball launching mechanism comprises a ball launching tube 3 arranged on the fixed seat 1, the side wall of the ball launching tube 3 is communicated with the outlet at the bottom end of the ball storage mechanism; the ball launching tube 3 is provided with a ball launching assembly for ejecting the volleyball in the inner cavity;

[0040] The ball launching assembly comprises a ball pushing plate 4 movably connected in the ball launching tube 3, the ball pushing plate 4 is drivingly connected with a drive assembly arranged in the ball launching tube 3;

[0041] The driving assembly comprises a driving shaft 6 arranged on the side wall of the serving pipe 3, a driving block 7 is drivingly connected on the driving shaft 6, and the driving block 7 is embedded and fixed on the ball pushing plate 4.

[0042] The volleyball serving device for volleyball training mainly serves to launch a volleyball and assist in volleyball training. The serving pipe 3 of the serving mechanism can be deflected on the bottom plate 2 to control the angle of serving, and is suitable for different volleyball training. The serving assembly in the serving pipe 3 can provide different force pushing force to the volleyball, so that the volleyball can be served according to different angles and forces, and thus is suitable for different auxiliary training requirements. The several driving shafts 6 of the serving assembly drive the ball pushing plate 4 to move, and when launching, different launching forces are provided through different initial positions of the launching plate, so that the actual volleyball activity is more realistically simulated, the ball receiving and hitting ability of the athletes is trained, the applicability is improved, and the training effect is improved. The volleyball serving device for volleyball training mainly serves to launch a volleyball and assist in volleyball training.

[0043] Further, the inner cavity bottom end of the serving pipe 3 and the ball pushing plate 4 are fixedly connected with a pushing spring 5 to provide a spring force to the ball pushing plate 4. When serving, the driving shaft 6 is separated from the driving block 7 to lose the constraint force, and the pushing spring 5 rebounds to push out the ball pushing plate 4.

[0044] Further optimization scheme, the side wall of the driving shaft 6 is provided with a plurality of transmission grooves 11, a transmission block 12 is movably connected in the transmission groove 11, one end of the transmission block 12 extends out of the transmission groove 11 and is drivingly connected with the driving block 7; the inner cavity of the driving shaft 6 is movably connected with a control rod 13, the outer wall of the control rod 13 is fixedly connected with a plurality of arc-shaped driving blocks 14, one end of the transmission block 12 is fixedly connected with a plurality of driven blocks 15, and the driving blocks 14 and the driven blocks 15 are in contact connection. The outer wall of the transmission block 12 is provided with a thread, and the thread is in thread connection with the inner wall of the driving block 7; when transmission is needed, the control rod 13 moves, so that the protruding parts of the semispherical driving blocks 14 and the driven blocks 15 coincide, thereby pushing the transmission block 12 out of the transmission groove 11, and the transmission block 12 is in thread connection with the driving block 7; when the driving motor 8 drives the driving shaft 6 to rotate, the meshing threads drive the driving block 7 to move; and when the volleyball needs to be pushed out, the control rod 13 drives the driving blocks 14 and the driven blocks 15 to be staggered, thereby the transmission block 12 is retracted into the transmission groove 11, so that the transmission block 12 is separated from the driving block 7 and no longer provides the constraint force, and the ball pushing plate 4 can be conveniently pushed out.

[0045] Further, the inner wall of the serving pipe 3 is provided with a plurality of limiting grooves 10, a limiting block 9 is slidingly connected in the limiting groove 10, the driving block 7 is embedded in the limiting block 9, and the limiting block 9 drives the ball pushing plate 4 to move.

[0046] Further, the elastic rope 49 is arranged between the two transmission blocks 12 arranged oppositely, facilitating the recovery of the opposite transmission blocks 12.

[0047] Further optimization scheme, one end of the control rod 13 is fixedly connected with the permanent magnet 16, the inner cavity of the drive shaft 6 is provided with the electromagnet 17 corresponding to the permanent magnet 16, the electromagnet 17 is arranged with the permanent magnet 16; the two ends of the inner cavity of the drive shaft 6 and the two ends of the control rod 13 are respectively fixedly connected with the return spring 18. The attraction state of the electromagnet 17 and the permanent magnet 16 is controlled by energization, and then the movement of the control rod 13 is controlled; at the same time, the two ends of the control rod 13 are respectively fixedly connected with the return spring 18 between the two ends of the inner cavity of the drive shaft 6, and the movement of the control rod 13 is controlled by the coupling of the electromagnet 17 and the permanent magnet 16.

[0048] Further optimization scheme, the ball storage mechanism includes a mounting seat 19 fixedly connected to the bottom plate 2, and a top-end open ball storage box 20 arranged at the top end of the mounting seat 19; the mounting seat 19 is provided with a transfer cavity 21 communicating with the inner cavity of the ball storage box 20, the outlet of the transfer cavity 21 is communicated with a ball conveying pipe 22 obliquely arranged towards the ball launching pipe 3, and the end of the ball conveying pipe 22 away from the mounting seat 19 is rotatably connected with a ball inlet 23 arranged on the side wall of the ball launching pipe 3; the ball conveying pipe 22 is provided with a control valve 24 for controlling the entry and exit of the volleyball. The open ball storage box 20 is used for storing a large number of volleyballs, the volleyballs are transferred to the obliquely arranged ball conveying pipe 22 through the transfer cavity 21 in the mounting seat 19, so that the volleyballs automatically move towards the ball launching pipe 3; the rotational arrangement of the ball inlet 23 and the ball conveying pipe 22 does not affect the process of the volleyball transmission, facilitating the deflection of the ball launching pipe 3, and different angles of ball launching can be achieved; the arrangement of the control valve 24 can be used to control the passing of the volleyball, so that the volleyball enters the ball launching pipe 3 when needed.

[0049] Further optimization scheme, the control valve 24 includes a valve body 25 arranged at the bottom end of the ball conveying pipe 22, a limiting rod 26 fixedly connected in the valve body 25, a valve plate 27 slidably connected on the limiting rod 26, and the valve plate 27 extending into the ball conveying pipe 22; a push-out spring 28 is fixedly connected between the valve plate 27 and the bottom end of the inner cavity of the valve body 25, and the push-out spring 28 is sleeved on the limiting rod 26. The limiting rod 26 is used for limiting the valve plate 27, and the push-out spring 5 is used for automatically controlling the valve plate 27; when the volleyball needs to pass, the valve plate 27 is withdrawn into the valve body 25, and the volleyball passes; when the volleyball needs to be blocked, the valve plate 27 is popped out into the ball conveying pipe 22 to block the volleyball, thereby achieving the control of the passing of the volleyball.

[0050] Further, the movement of the valve plate 27 can be controlled in different forms, which are all prior art and will not be described here.

[0051] Further optimization scheme, the bottom plate 2 is provided with guide rail 29, guide rail 29 is provided with guide slide 30, the side wall of the ball launching pipe 3 is provided with guide rod 31, the guide rod 31 extends into the guide rail 29 and is engaged with the guide rail 29; the end of the guide rod 31 is drivingly connected with the guide motor 32 slidingly connected with the side wall of the guide rail 29; the guide rod 31 includes a fixed rod 33 fixedly connected with the side wall of the ball launching pipe 3, the end of the fixed rod 33 is rotatably connected with the movable rod 34, the movable rod 34 is sleeved with the driving gear 36, the driving gear 36 is engaged with the guide rack 37 in the guide slide 30; the output shaft of the guide motor 32 is drivingly connected with the end of the movable rod 34. The guide motor 32 drives the movable rod 34 to rotate, and then drives the brake gear to engage with the guide rack 37 to drive, so that the position of the movable rod 34 in the guide rail 29 changes, and then the fixed rod 33 drives the ball launching pipe 3 to deflect, realizing the control of the ball launching angle.

[0052] Further, the movable rod 34 and the fixed rod 33 are connected by the connecting bearing 35.

[0053] Further optimization scheme, the bottom plate 2 is provided with limiting groove 38, the limiting groove 38 is slidingly connected with the limiting slide cylinder 39, the limiting slide cylinder 39 is slidingly connected with the supporting rod 40, the top end of the supporting rod 40 is hingedly connected with the bottom end of the ball launching pipe 3; the bottom end of the supporting rod 40 and the inner cavity of the limiting slide cylinder 39 are fixedly connected with the adaptive spring 41. The supporting rod 40 is hingedly connected with the ball launching pipe 3, when the ball launching pipe 3 rotates, the position of the supporting rod 40 in the limiting slide cylinder 39 changes, so that the adaptive spring 41 changes with the movement, supporting the deflection of the ball launching pipe 3, in combination with the ball inlet 23 rotatably connected with the ball launching pipe 22, supporting the ball launching pipe 3, without affecting the deflection of the ball launching pipe 3.

[0054] Further optimization scheme, the bottom end of the fixed seat 1 is fixedly connected with a plurality of supporting legs 42, the bottom end of the supporting leg 42 is provided with a lifting groove 43, the lifting groove 43 is fixedly connected with a lifting rod 44, the bottom end of the lifting rod 44 is fixedly connected with a lifting plate 45, and the bottom end of the lifting plate 45 is provided with a plurality of walking wheels 46. The lifting rod 44 in the lifting groove 43 can push out or retract the walking wheels 46, when pushed out, it is convenient to move the fixed seat 1; when the walking wheels 46 are retracted, the anti-skid pads 47 at the bottom end of the supporting legs 42 are in contact with the ground, increasing the stability.

[0055] Further, the side wall of the lifting plate 45 is provided with a positioning block 48, and the positioning block 48 realizes the lifting positioning of the lifting plate 45 in combination with the positioning groove of the side wall of the lifting groove 43.

[0056] In the description of the present application, it needs to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] The above-described embodiments are only to describe the preferred modes of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A volleyball serving device for volleyball training, characterized in that: Includes a fixed base (1), on which a base plate (2) is rotatably connected, and on which a ball storage mechanism and a ball serving mechanism are provided, the ball storage mechanism being connected to the ball serving mechanism; The serving mechanism includes a serving tube (3) mounted on the fixed base (1), the side wall of the serving tube (3) being connected to the outlet at the bottom of the ball storage mechanism; the inner cavity of the serving tube (3) is provided with a serving assembly for ejecting the volleyball; The serving assembly includes a pusher plate (4) movably connected inside the serving tube (3), and the pusher plate (4) is connected to a drive assembly disposed inside the serving tube (3). The drive assembly includes a drive shaft (6) disposed on the side wall of the ball tube (3), and a drive block (7) is connected to the drive shaft (6) for transmission. The drive block (7) is embedded and fixed on the push plate (4).

2. The volleyball serving device for volleyball training according to claim 1, characterized in that: The drive shaft (6) has several transmission grooves (11) on its side wall. A transmission block (12) is movably connected in the transmission groove (11). One end of the transmission block (12) extends out of the transmission groove (11) and is connected to the drive block (7) in a transmission connection.

3. The volleyball serving device for volleyball training according to claim 2, characterized in that: The inner cavity of the drive shaft (6) is movably connected to a control rod (13). Several arc-shaped active blocks (14) are fixed to the outer wall of the control rod (13). Several driven blocks (15) are fixed to one end of the transmission block (12) facing the control rod (13). The active block (14) and the driven block (15) are in contact and connected.

4. The volleyball serving device for volleyball training according to claim 3, characterized in that: One end of the control rod (13) is fixedly connected to a permanent magnet (16), and an electromagnet (17) corresponding to the permanent magnet (16) is provided in the inner cavity of the drive shaft (6). The electromagnet (17) is attracted to the permanent magnet (16). A return spring (18) is fixedly connected between the two ends of the inner cavity of the drive shaft (6) and the two ends of the control rod (13).

5. The volleyball serving device for volleyball training according to claim 1, characterized in that: The ball storage mechanism includes a mounting base (19) fixed to the base plate (2), and a ball storage box (20) with an open top is provided at the top of the mounting base (19); a transfer chamber (21) communicating with the inner cavity of the ball storage box (20) is provided inside the mounting base (19), and a passing pipe (22) inclined towards the serving tube (3) is connected to the outlet of the transfer chamber (21); one end of the passing pipe (22) away from the mounting base (19) is rotatably connected to the ball inlet (23) provided on the side wall of the serving tube (3); a control valve (24) for controlling the entry and exit of volleyballs is provided inside the passing pipe (22).

6. The volleyball serving device for volleyball training according to claim 5, characterized in that: The control valve (24) includes a valve body (25) disposed at the bottom end of the passing tube (22), a limit rod (26) fixedly connected inside the valve body (25), a valve plate (27) slidably connected on the limit rod (26), and the valve plate (27) extending into the passing tube (22); a pop-out spring (28) is fixedly connected between the valve plate (27) and the bottom end of the inner cavity of the valve body (25), and the pop-out spring (28) is sleeved outside the limit rod (26).

7. The volleyball serving device for volleyball training according to claim 1, characterized in that: The base plate (2) is provided with a guide rail (29), and a guide slide (30) is provided on the guide rail (29). A guide rod (31) is fixedly provided on the side wall of the ball-serving tube (3). The guide rod (31) extends into the guide rail (29) and engages with the guide rail (29). The end of the guide rod (31) is connected to the guide motor (32) which is slidably connected to the side wall of the guide rail (29).

8. The volleyball serving device for volleyball training according to claim 7, characterized in that: The guide rod (31) includes a fixed rod (33) fixed to the side wall of the ball-serving tube (3), and a movable rod (34) rotatably connected to the end of the fixed rod (33). A drive gear (36) is sleeved on the movable rod (34), and the drive gear (36) meshes with the guide rack (37) in the guide slide (30). The output shaft of the guide motor (32) is connected to the end of the movable rod (34) for transmission.

9. The volleyball serving device for volleyball training according to claim 1, characterized in that: A limiting groove (38) is provided on the base plate (2), and a limiting slide cylinder (39) is slidably connected in the limiting groove (38). A support rod (40) is slidably connected in the limiting slide cylinder (39). The top end of the support rod (40) is hinged to the bottom end of the ball-serving tube (3). An adaptation spring (41) is fixed between the bottom end of the support rod (40) and the inner cavity of the limiting slide cylinder (39).

10. The volleyball serving device for volleyball training according to claim 1, characterized in that: The bottom end of the fixed base (1) is fixed with several support feet (42), and the bottom end of the support feet (42) is provided with a lifting groove (43). A lifting rod (44) is fixed in the lifting groove (43), and a lifting plate (45) is fixed at the bottom end of the lifting rod (44). A number of traveling wheels (46) are provided at the bottom end of the lifting plate (45).

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