阅读说明：本技术 一种用于体育教学的网球发球装置 (Tennis serving device for physical education ) 是由 李雨林 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种用于体育教学的网球发球装置,包括发球管、防护箱和底座,所述发球管顶部固定连接有储球箱,所述储球箱内部放置有多个网球,所述发球管固定连接在防护箱顶部,所述底座顶部转动连接有第一转轴。本发明在动力机构、推动机构和防护机构的相互配合下,电机转动通过皮带带动第三转轴、圆盘和固定棒转动,固定棒推动在发球管内的网球向靠近连接板移动,网球移动使得第一弹簧压缩,当固定棒转动至活动槽内部与网球脱离时,第一弹簧扩张使得网球从发射管弹射出去,利用弹簧弹力弹射网球,与市场上的发球器相比,该装置结构简单,弹射出去的网球力度适用于网球初学者,且造价低。(The invention discloses a tennis ball serving device for physical education, which comprises a serving pipe, a protective box and a base, wherein the top of the serving pipe is fixedly connected with a ball storage box, a plurality of tennis balls are placed in the ball storage box, the serving pipe is fixedly connected to the top of the protective box, and the top of the base is rotatably connected with a first rotating shaft. According to the tennis ball launching device, under the mutual cooperation of the power mechanism, the pushing mechanism and the protection mechanism, the motor rotates to drive the third rotating shaft, the disc and the fixed rod to rotate through the belt, the fixed rod pushes a tennis ball in the tennis ball launching tube to move towards the connecting plate, the tennis ball moves to enable the first spring to be compressed, when the fixed rod rotates to the inside of the movable groove and is separated from the tennis ball, the first spring expands to enable the tennis ball to be launched out of the launching tube, and the tennis ball is launched by the aid of elastic force of the spring.)

1. A tennis ball serving device for physical education comprises a ball serving tube (1), a protective box (2) and a base (3), and is characterized in that the top of the ball serving tube (1) is fixedly connected with a ball storage box (7), a plurality of tennis balls (21) are placed in the ball storage box (7), the ball serving tube (1) is fixedly connected with the top of the protective box (2), the top of the base (3) is rotatably connected with a first rotating shaft (4), the top end of the first rotating shaft (4) penetrates through the bottom of the protective box (2) and is fixedly connected with the inner top of the protective box (2), the bottom of the ball serving tube (1) is provided with a fixing groove (5) communicated with the inner part of the protective box (2), the inner bottom of the protective box (2) is rotatably connected with a second rotating shaft (6), a power mechanism is arranged in the protective box (2), the outer side wall of the second rotating shaft (6) is provided with a rotating, the inner part of the ball serving tube (1) is respectively provided with a pushing mechanism and a protection mechanism.

2. The tennis serving device for physical education as claimed in claim 1, the power mechanism comprises a third rotating shaft (8), a disc (9), a fixed rod (10), a motor (11), a belt (12) and a bevel gear (13), a third rotating shaft (8) is rotatably connected between the inner side walls of two opposite sides of the protective box (2), the outer side wall of the third rotating shaft (8) is fixedly sleeved with a disc (9), the outer side wall of the disc (9) is fixedly connected with a fixing rod (10), the inner side wall of the protective box (2) is fixedly connected with a motor (11), the output shaft of the motor (11) is in transmission connection with a third rotating shaft (8) through a belt (12), the outer side wall of the third rotating shaft (8) and the upper end of the second rotating shaft (6) are fixedly sleeved with bevel gears (13), and the bevel gears (13) are meshed and connected.

3. The tennis ball serving device for sports teaching of claim 1, wherein the rotating mechanism comprises a first gear (14) and a second gear (15), the outer side wall of the second rotating shaft (6) is fixedly sleeved with the first gear (14), the outer side wall of the first rotating shaft (4) is fixedly sleeved with the second gear (15) meshed with the first gear (14), the first gear (14) is an incomplete gear, four notches are formed in the gear edge of the first gear (14) at equal intervals, and the total length of the gear sum existing on the first gear (14) is equal to the circumference of the second gear (15).

4. The tennis serving device for physical education as claimed in claim 1, the pushing mechanism comprises a ball inlet (16), a movable groove (17), an L-shaped plate (18), a movable opening (19), a connecting plate (20) and a first spring (24), a ball inlet (16) is arranged at the top of the ball serving tube (1) corresponding to the position of the ball storage box (7), a movable groove (17) is arranged at the top in the ball serving tube (1), the ball inlet (16) is communicated with the movable groove (17), an L-shaped plate (18) is connected inside the movable groove (17) in a sliding manner, a movable opening (19) matched with the ball inlet (16) is formed in the top of the L-shaped plate (18) in a penetrating manner, the inner part of the bulb tube (1) is fixedly connected with a connecting plate (20), and a plurality of first springs (24) are fixedly connected between the connecting plate (20) and the L-shaped plate (18).

5. The tennis ball serving device for sports teaching of claim 1, wherein the protection device comprises a mounting groove (22), two symmetrically arranged mounting grooves (22) are formed in the inner side walls of two opposite sides of the ball serving tube (1), the two symmetrically arranged limiting plates (23) are rotatably connected to the inside of the two mounting grooves (22), and the second spring (25) is fixedly connected between each limiting plate (23) and the bottom of each mounting groove (22).

6. The tennis ball serving device for sports teaching of claim 2, wherein the outer side walls of the output shaft of the motor (11) and the third rotating shaft (8) are fixedly sleeved with belt pulleys matched with the belt (12).

Technical Field

The invention relates to the technical field of teaching equipment, in particular to a tennis serving device for physical education.

Background

Tennis, a popular sport in a new era, is mainly carried out in a two-player-to-player mode or a four-player-to-player mode, a school sports class comprises a tennis class, a plurality of students begin with tennis from the young, a school tennis court is limited, teachers cannot interact with all students, and cooperation teaching is often carried out through machines.

The tennis service robot has similar auxiliary training equipment on the market, the problem that a single person cannot hit balls for training can be solved, and for students with a large number of people, the service robot on the market cannot meet the requirements of a large number of students, so that the training of the students and the teaching process of teachers are slow.

Disclosure of Invention

The invention aims to solve the problem that a pitching machine in the prior art cannot meet the training requirements of a plurality of students, and provides a tennis pitching device for physical education.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a tennis serving device for sports teaching, includes service tube, protective housing and base, service tube top fixedly connected with stores up the ball case, a plurality of tennis have been placed to store up the inside ball case, service tube fixed connection is at the protective housing top, the base top is rotated and is connected with first pivot, first pivot top runs through protective housing bottom and protective housing inside top fixed connection, the fixed slot that is linked together with the protective housing inside is seted up to service tube bottom, the bottom rotates in the protective housing and is connected with the second pivot, the inside power unit that is equipped with of protective housing, second pivot lateral wall is equipped with rotary mechanism, the inside pushing mechanism and the protection machanism of being equipped with respectively of service tube.

Preferably, power unit includes third pivot, disc, fixed stick, motor, belt and bevel gear, it is connected with the third pivot to rotate between the relative both sides inside wall of protecting box, the fixed disk that has cup jointed of third pivot lateral wall, disc lateral wall fixedly connected with fixed stick, protecting box inside wall fixedly connected with motor, the motor output shaft passes through belt drive with the third pivot and is connected, third pivot lateral wall and second pivot upper end all cup joint have bevel gear, two bevel gear meshing is connected.

Preferably, rotary mechanism includes first gear and second gear, the fixed cover of second pivot lateral wall has connect first gear, the fixed second gear that cup joints with first gear looks meshing of first pivot lateral wall, first gear is incomplete gear, the tooth edge of first gear is equipped with four breachs around the equidistance, it equals with the girth of second gear to have the total girth that the gear adds up on the first gear.

Preferably, pushing mechanism includes goal, movable groove, L template, movable opening, connecting plate and first spring, the position that the service pipe top corresponds the ball storage box runs through and has seted up the goal, the movable groove has been seted up at the intraductal top of service, goal and movable groove intercommunication, the inside sliding connection of movable groove has the L template, L template top runs through the movable opening of seting up with goal looks adaptation, the inside fixedly connected with connecting plate of service pipe, many first springs of fixedly connected with between connecting plate and the L template.

Preferably, the protector includes mounting groove, limiting plate and second spring, two mounting grooves that are the symmetry and set up are seted up to the both sides inside wall that the service bulb is relative, two the inside rotation of mounting groove is connected with two limiting plates that are the symmetry and set up, equal fixedly connected with second spring between limiting plate and the mounting groove tank bottom.

Preferably, the motor output shaft and the outer side wall of the third rotating shaft are fixedly sleeved with a belt pulley matched with a belt.

The invention has the beneficial effects that:

1. under the mutual cooperation of the power mechanism, the pushing mechanism and the protection mechanism, the motor rotates to drive the third rotating shaft, the disc and the fixed rod to rotate through the belt, the fixed rod pushes the tennis ball in the ball serving pipe to move towards the connecting plate, the tennis ball moves to enable the first spring to be compressed, when the fixed rod rotates to the inside of the movable groove and is separated from the tennis ball, the first spring expands to enable the tennis ball to be ejected out of the launching tube, and the tennis ball is ejected by utilizing the elastic force of the spring.

2. Utilize rotary mechanism for the rotatory round of service tube can be to four different position service in proper order, can train to four students, and this service robot is more suitable for a plurality of students' teaching training, compares service robot on market, more raises the efficiency and is convenient.

Drawings

FIG. 1 is a front sectional view of a tennis serving device for physical education according to the present invention;

FIG. 2 is a schematic view of a meshing structure of two bevel gears in a tennis ball serving device for physical education according to the present invention;

FIG. 3 is a schematic top sectional view of a service tube of a tennis service device for physical education according to the present invention;

fig. 4 is a schematic view of a meshing structure of a first gear and a second gear in the tennis serving device for physical education according to the present invention.

In the figure: 1. a bulb tube; 2. a protective box; 3. a base; 4. a first rotating shaft; 5. fixing grooves; 6. a second rotating shaft; 7. a ball storage box; 8. a third rotating shaft; 9. a disc; 10. a fixing rod; 11. a motor; 12. a belt; 13. a bevel gear; 14. a first gear; 15. a second gear; 16. a ball inlet; 17. a movable groove; 18. an L-shaped plate; 19. a movable opening; 20. a connecting plate; 21. tennis balls; 22. mounting grooves; 23. a limiting plate; 24. a first spring; 25. a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 4, a tennis ball serving device for physical education, comprising a serving tube 1, a protective box 2 and a base 3, the serving tube 1, the shape of protective housing 2 and base 3 is as shown in fig. 1 and fig. 3, 1 top fixedly connected with storage ball case 7 of service tube, a plurality of tennis balls 21 have been placed to storage ball case 7 inside, 1 fixed connection of service tube is at protective housing 2 top, 3 tops of base are rotated and are connected with first pivot 4, 4 tops of first pivot run through protective housing 2 bottoms and 2 interior top fixed connection of protective housing, fixed slot 5 that are linked together with 2 inside of protective housing is seted up to service tube 1 bottom, the bottom is rotated and is connected with second pivot 6 in the protective housing 2, the convex groove with 6 looks adaptations of second pivot is seted up to the bottom in the protective housing 2, 6 bottom fixedly connected with carousels of second pivot, the carousel is located convex groove for 6 rotations of second pivot are more stable.

A power mechanism is arranged in the protective box 2, the power mechanism comprises a third rotating shaft 8, a disc 9, a fixed rod 10, a motor 11, a belt 12 and bevel gears 13, the third rotating shaft 8 is rotatably connected between the inner side walls of two opposite sides of the protective box 2, the disc 9 is fixedly sleeved on the outer side wall of the third rotating shaft 8, the fixed rod 10 is fixedly connected on the outer side wall of the disc 9, the motor 11 is fixedly connected on the inner side wall of the protective box 2, the output shaft of the motor 11 is in transmission connection with the third rotating shaft 8 through the belt 12, belt pulleys matched with the belt 12 are fixedly sleeved on the outer side walls of the motor 11 and the third rotating shaft 8, the bevel gears 13 are fixedly sleeved on the outer side wall of the third rotating shaft 8 and the upper end of the second rotating shaft 6, the two bevel gears 13 are in meshing connection, the fixed rod 10 contacts and pushes the tennis ball 21 to move towards, so that tennis ball 21 may be ejected.

The outer side wall of the second rotating shaft 6 is provided with a rotating mechanism, the rotating mechanism comprises a first gear 14 and a second gear 15, the outer side wall of the second rotating shaft 6 is fixedly sleeved with the first gear 14, the outer side wall of the first rotating shaft 4 is fixedly sleeved with the second gear 15 meshed with the first gear 14, it is worth noting that the first gear 14 is an incomplete gear, four notches are formed in the periphery of the tooth edge of the first gear 14 in an equidistant mode, and the total circumference of the first gear 14, which is formed by adding the gears, is equal to the circumference of the second gear 15.

The inner part of the service tube 1 is respectively provided with a pushing mechanism and a protection mechanism, the pushing mechanism comprises a ball inlet 16, a movable groove 17, an L-shaped plate 18, a movable opening 19, a connecting plate 20 and first springs 24, the top of the service tube 1 is provided with the ball inlet 16 corresponding to the position of the ball storage box 7 in a penetrating way, the top of the service tube 1 is provided with the movable groove 17, the ball inlet 16 is communicated with the movable groove 17, the inner part of the movable groove 17 is connected with the L-shaped plate 18 in a sliding way, the top of the L-shaped plate 18 is provided with the movable opening 19 matched with the ball inlet 16 in a penetrating way, the inner part of the service tube 1 is fixedly connected with the connecting plate 20, a plurality of first springs 24 are fixedly connected between the connecting plate 20 and the L-shaped plate 18, the protection device comprises a mounting groove 22, a limiting plate 23 and second springs 25, two inner side walls of the service tube 1 opposite to each other, the second springs 25 are fixedly connected between the limiting plate 23 and the bottom of the mounting groove 22, the L-shaped plate 18, the movable port 19 and the ball inlet 16 are used for preventing a second tennis ball 21 from falling in the service pipe 1 due to dislocation of the movable port 19 and the ball inlet 16 when the fixed rod 10 pushes the tennis ball 21 to move, so that the service pipe 1 is prevented from being blocked, after the tennis ball 21 in the service pipe 1 is ejected, the movable port 19 corresponds to the ball inlet 16, and the next tennis ball 21 enters the service pipe 1, so that the next ejection is facilitated.

The working principle is as follows: the device is moved to the middle of a tennis court, four students for learning tennis are arranged to stand at four corresponding different positions respectively for preparing training, the tennis storage box 7 is filled with tennis balls 21, and the tennis balls 21 at the bottommost part of the tennis storage box 7 enter the pitching tube 1 along the tennis inlet 16 and the tennis moving opening 19.

After the motor 11 is started, the motor 11 rotates through the belt 12 to drive the third rotating shaft 8, the disc 9 and the bevel gears 13 to rotate, the disc 9 drives the fixed rod 10 to rotate, the fixed rod 10 pushes the tennis ball 21 in the service pipe 1 to move towards the connecting plate 20 and compress the first spring 24, when the fixed rod 10 is not in contact with the tennis ball 21, the tennis ball 21 is ejected out due to the elastic force of the first spring 24 to achieve the purpose of launching, the third rotating shaft 8 drives the second rotating shaft 6 to rotate through the meshing connection of the two bevel gears 13, the second rotating shaft 6 drives the first gear 14 to rotate, the first gear 14 is an incomplete gear, the first gear 14 is in meshing connection with the second gear 15 to drive the service pipe 1 and the protective box 2 to rotate, when the first gear 14 is not meshed with the second gear 15, the service pipe 1 and the protective box 2 are not moved, the fixed rod 10 is firstly in contact with the tennis ball 21 and then separated to eject the tennis ball 21, after the tennis ball 21 is ejected, the first gear 14 is continuously meshed with the second gear 15 for transmission, and when the first gear 14 is not meshed with the second gear 15, the process is repeated, so that the goal that the ball serving pipe 1 rotates for one circle to launch one tennis ball 21 in four different directions can be achieved, a period of time can be paused before launching, reaction preparation for hitting the tennis ball by students is provided, and when no tennis ball 21 exists in the ball storage box 7 or training is finished, the motor 11 can be turned off.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.