CN114712825B

CN114712825B - Tennis trainer that altitude mixture control can carry out

Info

Publication number: CN114712825B
Application number: CN202210503499.2A
Authority: CN
Inventors: 赵书巍; 柯于; 凌文杰; 周亚飞; 王佳瑶; 赵龙
Original assignee: Xinxiang Medical University
Current assignee: Xinxiang Medical University
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2023-04-18
Anticipated expiration: 2042-05-09
Also published as: CN114712825A

Abstract

The invention discloses a tennis training device capable of adjusting height, and belongs to the technical field of sports training. A height adjustable tennis training apparatus, comprising: the height adjusting mechanism and the ball exercising mechanism are arranged on the height adjusting mechanism, the ball exercising mechanism is movably connected with the height adjusting mechanism, the ball serving mechanism is detachably connected with the height adjusting mechanism, the height adjusting mechanism comprises two balance weight plates which are horizontally arranged, first threaded sleeves are coaxially arranged at the tops of the two balance weight plates, the two first threaded sleeves are vertically arranged, first threaded rods are coaxially and threadedly connected with inner cavities at the top ends of the two first threaded sleeves, rotating sleeves are coaxially sleeved outside the top ends of the two first threaded rods, and the rotating sleeves are movably connected with the first threaded rods through first bearings.

Description

Tennis trainer that altitude mixture control can carry out

Technical Field

The invention belongs to the technical field of physical training, and particularly relates to a tennis training device with adjustable height.

Background

In daily life, some people like playing tennis, and when the tennis field is few and people who like playing tennis and conceding the same way are few, some tennis lovers do not launch training and playing tennis, so people can simulate tennis through the tennis trainer, but the existing tennis trainer cannot well mobilize the bodies of people and is far away from actual combat.

Disclosure of Invention

The invention aims to solve the problems that the existing tennis training device cannot well mobilize the body of people and is far away from actual combat, and provides a tennis training device with adjustable height.

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

a height adjustable tennis training apparatus, comprising: the device comprises a height-adjusting mechanism, a ball serving mechanism and a ball practicing mechanism, wherein the ball serving mechanism and the ball practicing mechanism are arranged on the height-adjusting mechanism, the ball practicing mechanism is movably connected with the height-adjusting mechanism, and the ball serving mechanism is detachably connected with the height-adjusting mechanism;

the height adjusting mechanism comprises two horizontally arranged balance weight plates, first threaded sleeves are coaxially arranged at the tops of the two balance weight plates, the two first threaded sleeves are vertically arranged, inner cavities at the tops of the two first threaded sleeves are coaxially and threadedly connected with first threaded rods, rotating sleeves are coaxially sleeved outside the tops of the two first threaded rods and movably connected with the first threaded rods through first bearings, a tennis net is arranged between the two rotating sleeves and has elastic expansion and contraction, connecting ropes are arranged at four corners of the tennis net, two corners at the top of the tennis net are connected with the tops of the rotating sleeves through the connecting ropes, two corners at the bottom of the tennis net are connected with the bottoms of the first threaded sleeves through the connecting ropes, the ball serving mechanism is connected with the rotating sleeves, and the ball refining mechanism is movably connected with the first threaded rods;

the ball serving mechanism comprises a displacement component, a ball serving component, a supporting component and a transmission component, wherein the displacement component is connected with the rotating sleeves, the displacement component is arranged between the two rotating sleeves, the transmission component is connected with the displacement component, the supporting component is arranged at the bottom of the displacement component, and the ball serving component is arranged at the top of the transmission component;

the displacement member comprises a second sleeve coaxially sleeved at the bottom of the rotary sleeve, the second sleeve is detachably connected with the rotary sleeve, a second connecting plate is arranged on one side of the two second sleeves, the two second connecting plates are parallel to each other, a second threaded rod and a sliding rod are arranged between the two second connecting plates, the second threaded rod and the sliding rod are perpendicular to the second connecting plates, the second threaded rod is positioned above the sliding rod and movably connected with the second connecting plates, the second threaded rod does not displace when rotating, a plurality of second guide grooves are formed in the outer portion of the second threaded rod along the circumferential direction, the guide directions of the second guide grooves are parallel to the second threaded rod, the length of the second guide grooves is equal to that of the second threaded rod, a motor connected with the second connecting plates is coaxially arranged at one end of the second threaded rod, a first battery is arranged on one side of the second connecting plates, the same displacement barrel is sleeved on the outer portions of the second threaded rod and the sliding rod, the displacement barrel is vertically arranged, the displacement barrel is in threaded connection with the second threaded rod, the displacement barrel is in sliding connection with the sliding rod, the support member is arranged at the bottom of the displacement barrel, a seal is arranged at the top of the displacement barrel, and the displacement barrel is arranged at the top of the displacement barrel;

the transmission component comprises a first bevel gear coaxially sleeved outside the second threaded rod, the first bevel gear is positioned inside the displacement cylinder, a bulge for clamping the first bevel gear is arranged in the displacement cylinder, a sliding block matched with the second guide groove is arranged on the inner circular surface of the first bevel gear, a connecting cylinder is coaxially arranged at the top of the displacement cylinder, the connecting cylinder is hollow, the top end of the connecting cylinder is provided with an opening, the bottom end of the connecting cylinder is sealed, a second bevel gear is meshed at the top of the first bevel gear, the bulge does not influence the rotation of the first bevel gear, limits the first bevel gear and the second bevel gear to move relatively, the axis of the second bevel gear is vertical, the top of the second bevel gear is coaxially provided with a rotating shaft, the top end of the rotating shaft penetrates through the bottom of the connecting cylinder and extends to the inner cavity of the connecting cylinder, the rotating shaft is movably connected with the connecting cylinder through a second bearing, the top of the rotating shaft is coaxially provided with a rotating column positioned in the inner cavity of the connecting cylinder, the top of the rotating column is provided with an inclined plane, a first limiting rod horizontally arranged is arranged above the rotating column, two ends of the first limiting rod are connected with the inner wall of the connecting cylinder, one end of the first limiting rod vertically penetrates through a top rod, the top rod is movably connected with the first limiting rod, the bottom of the top rod abuts against the inclined plane, the ball serving component is coaxially arranged at the top of the connecting cylinder, and the top rod is movably connected with the ball serving component;

the ball serving component comprises a solid column coaxially arranged at the top of the connecting cylinder, a vertical guide hole matched with the ejector rod is vertically and upwards arranged at the bottom of the solid column, the top of the ejector rod extends into the vertical guide hole, a ball inlet hole communicated with the vertical guide hole is horizontally arranged at one side of the solid column, the top surface of the ejector rod is flush with the bottom of the ball inlet hole when being at the lowest position, a bending pipe is coaxially arranged at one end of the ball inlet hole, which is deviated from the vertical guide hole, the bending pipe is bent upwards, a funnel is arranged at the top end of the bending pipe, a plurality of tennis balls are loaded in the funnel, a horizontally arranged ball serving hole is arranged at the top end of the vertical guide hole, the top surface of the ejector rod is flush with the bottom of the ball serving hole when being at the highest position, the guiding direction of the ball serving hole is vertical to the tennis net, the ball serving hole penetrates through the solid column, and a fan used for blowing air into the ball serving hole is arranged at one side, which is deviated from the tennis net, of the solid column, solid capital portion is provided with the second battery that is used for providing electric power to the fan, the one end that the service hole deviates from the fan is coaxial to be provided with the service pipe, the service pipe is located the tennis net top, the coaxial ring that is provided with of service pipe suspension end, the ring inner chamber matches with the service pipe inner chamber, the ring is close to the outside coaxial annular of having seted up of one end of service pipe, the outside coaxial movable sleeve of ring is equipped with the lantern ring, the lantern ring is close to the one end of service pipe and has seted up the through hole, the through hole radially extends along the lantern ring, the matching is provided with the bolt in the through hole, the bolt bottom stretches into in the annular, lantern ring suspension end and ring suspension end are in same vertical face, lantern ring suspension end is coaxial to be provided with the go-between, go-between inner chamber diameter equals lantern ring inner chamber diameter, round-inside-face one side is provided with the mounting groove, the matching is provided with the sheet rubber in the mounting groove, the sheet is provided with friction line towards one side of go-between inner chamber.

Preferably, the supporting member comprises a third threaded rod coaxially arranged at the bottom of the displacement cylinder, a second threaded sleeve is coaxially sleeved outside the bottom end of the third threaded rod, a disc is coaxially arranged at the bottom end of the second threaded sleeve, and a plurality of universal wheels are arranged at the bottom of the disc.

Preferably, the ball practicing mechanism comprises a first sleeve coaxially sleeved outside a first threaded rod, the first sleeve is movably connected with the first threaded rod through a third bearing, the first sleeve is located below a rotary sleeve, a second limiting rod vertically extending downwards is arranged at the bottom of the first sleeve, a first guide groove matched with the second limiting rod is formed in the outer portion of the first threaded sleeve, the bottom end of the second limiting rod is inserted into the first guide groove, a first connecting rod is arranged on the outer circular surface of the first sleeve, the extending direction of the first connecting rod is opposite to that of the second connecting plate, the first connecting rod extends in the radial direction of the first sleeve, a vertically arranged spring is arranged at the top of a suspension end of the first connecting rod, a horizontally arranged first connecting plate is arranged at the top of the spring, a first round rod is arranged at one end of the first connecting plate, which is far away from the first sleeve, one end of the first round rod is close to the first connecting plate and is in threaded connection with the first connecting plate, a first bent rod suspension end is provided with the first round rod, the bent rod is horizontally arranged, the second round rod is perpendicular to the first round rod, the outer portion of the second limiting rod is sleeved with the second limiting rod, and the second limiting rod is located between the second limiting rod and the second limiting rod.

Preferably, the vertical guide hole, the goal hole and the serve hole are matched with the tennis ball.

Preferably, the first battery is electrically connected with the motor, the fan is electrically connected with the second battery, and the second connecting plate is provided with a controller for controlling the operation of the motor and the fan.

Compared with the prior art, the tennis training device capable of adjusting the height provided by the invention has the following beneficial effects:

1. when the tennis net is used, when a wide field exists, the tennis net is unfolded, the first threaded rod rotates to drive the rotating sleeve to move by rotating the first threaded rod, the rotating sleeve drives the tennis net to rise or fall, and therefore the tennis net is convenient to adapt to different people.

2. When tennis balls pass through the rubber sheet, the rubber sheet is rough at the moment before the tennis balls are separated, the inner wall of the connecting ring on the other side is smooth, the tennis balls can rotate, so that rotating balls are generated, the training difficulty can be improved, the tennis level of a user can be improved conveniently, the rubber sheet can be positioned in different directions from top to bottom and from left to right by rotating the connecting ring, the tennis balls can rotate in different directions, the training level of the user can be improved conveniently, when the rotating balls are not needed, the bolt is pulled off, the connecting ring and the lantern ring are taken down, the non-rotating percussion balls can be obtained at the moment, the regulation can be carried out according to the level of the user, the user who uses different tennis levels can use conveniently, the serving mechanism is supported through the supporting component, and the tennis training device is prevented from falling under the gravity action of the serving mechanism.

3. When the training device is used in a field, the user can hit the limiting tennis ball to train and hit the ball and can also train to fire the rotary ball.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a first schematic view of the connection structure of the height-adjusting mechanism, the ball serving mechanism and the ball practicing mechanism of the invention;

FIG. 3 is a second schematic view of the connection structure of the height-adjusting mechanism, the ball serving mechanism and the ball practicing mechanism of the present invention;

FIG. 4 is a schematic view of a ball practicing mechanism according to the present invention;

FIG. 5 is a third schematic view of the connection structure of the height adjusting mechanism, the ball serving mechanism and the ball practicing mechanism of the present invention;

FIG. 6 is a first structural diagram of a ball serving mechanism according to the present invention;

FIG. 7 is a second structural view of the ball serving mechanism of the present invention;

FIG. 8 is a third schematic structural view of a ball serving mechanism of the present invention;

FIG. 9 is a schematic view of the ball serving member and drive member configuration of the present invention;

FIG. 10 is a schematic view of the drive member configuration of the present invention;

FIG. 11 is a first schematic structural view of a ball serving member of the present invention;

FIG. 12 is a second structural view of a ball serving member of the present invention;

fig. 13 is a third structural view of the ball serving member of the present invention.

The reference numbers in the figures illustrate:

10. a height adjusting mechanism; 110. a weight plate; 120. a first threaded sleeve; 130. a first threaded rod; 140. rotating the sleeve; 150. a tennis net; 160. connecting ropes; 20. a service mechanism; 210. a displacement member; 211. a second sleeve; 212. a second connecting plate; 213. a second threaded rod; 2131. a second guide groove; 214. a slide bar; 215. a first battery; 216. a motor; 217. a displacement cylinder; 220. a ball serving member; 221. a solid column; 222. a vertical guide hole; 223. a ball inlet hole; 224. a ball serving hole; 225. bending the tube; 226. a funnel; 227. a bulb tube; 2271. a circular ring; 2272. a ring groove; 2273. a collar; 2274. a through hole; 2275. a bolt; 2276. a connecting ring; 2277. mounting grooves; 2278. a rubber sheet; 228. a fan; 229. a second battery; 230. a support member; 231. a third threaded rod; 232. a second threaded sleeve; 233. a disc; 234. a universal wheel; 240. a transmission member; 241. a first bevel gear; 242. a slider; 243. a second bevel gear; 244. a rotating shaft; 245. a spin column; 246. an inclined surface; 247. a top rod; 248. a first limit rod; 249. a connecting cylinder; 30. a ball training mechanism; 310. a first sleeve; 320. a second limiting rod; 321. a first guide groove; 330. a first connecting rod; 340. a spring; 350. a first connecting plate; 360. a first round bar; 370. a curved rod; 380. a second round bar; 381. a first limit ring; 382. a limit bolt; 390. limiting tennis balls.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

1-13, a height adjustable tennis training apparatus, comprising: the height-adjusting mechanism 10, the service mechanism 20 and the practice mechanism 30 are both arranged on the height-adjusting mechanism 10, the practice mechanism 30 is movably connected with the height-adjusting mechanism 10, and the service mechanism 20 is detachably connected with the height-adjusting mechanism 10.

The height adjusting mechanism 10 can be properly adjusted according to the height of an actual user, so as to facilitate tennis training of both sides, the height adjusting mechanism 10 includes two weight plates 110 which are horizontally arranged, the tops of the two weight plates 110 are coaxially provided with first threaded sleeves 120, the two first threaded sleeves 120 are vertically arranged, the inner cavities of the tops of the two first threaded sleeves 120 are coaxially and threadedly connected with first threaded rods 130, the outsides of the tops of the two first threaded rods 130 are coaxially sleeved with rotating sleeves 140, the rotating sleeves 140 are movably connected with the first threaded rods 130 through first bearings, a tennis net 150 is arranged between the two rotating sleeves 140, the tennis net 150 is elastically telescopic, connecting ropes 160 are arranged at four corners of the tennis net 150, two corners at the top of the tennis net 150 are connected with the tops of the rotating sleeves 140 through the connecting ropes 160, two corners at the bottom of the tennis net 150 are connected with the bottoms of the first threaded sleeves 120 through the connecting ropes 160, the serving mechanism 20 is connected with the rotating sleeves 140, and the practicing mechanism 30 is movably connected with the first threaded rods 130; when a spacious field exists, the tennis net 150 is unfolded, the first threaded rod 130 rotates to drive the rotating sleeve 140 to move by rotating the first threaded rod 130, and the rotating sleeve 140 drives the tennis net 150 to rise or fall, so that the tennis net is suitable for different people.

The ball serving mechanism 20 includes a displacement member 210, a ball serving member 220, a support member 230, and a transmission member 240, wherein the displacement member 210 is connected to the rotating sleeves 140, the displacement member 210 is interposed between the two rotating sleeves 140, the transmission member 240 is connected to the displacement member 210, the support member 230 is disposed at the bottom of the displacement member 210, and the ball serving member 220 is disposed at the top of the transmission member 240.

The displacement member 210 can change the position for launching tennis balls, the displacement member 210 comprises a second sleeve 211 coaxially sleeved at the bottom of the rotating sleeve 140, the second sleeve 211 is detachably connected with the rotating sleeve 140, specifically, the second sleeve 211 is composed of two semicircular rings, the two semicircular rings are connected through a bolt, a second connecting plate 212 is arranged on the same side of the two second sleeves 211, the two second connecting plates 212 are parallel to each other, a second threaded rod 213 and a sliding rod 214 are arranged between the two second connecting plates 212, the second threaded rod 213 and the sliding rod 214 are both vertical to the second connecting plate 212, the second threaded rod 213 is positioned above the sliding rod 214, the second threaded rod 213 is movably connected with the second connecting plate 212, and the second threaded rod 213 does not displace when rotating, a plurality of second guide grooves 2131 are formed in the outer portion of the second threaded rod 213 along the circumferential direction, the guide direction of the second guide grooves 2131 is parallel to that of the second threaded rod 213, the length of the second guide grooves 2131 is equal to that of the second threaded rod 213, a motor 216 connected with a second connecting plate 212 is coaxially arranged at one end of the second threaded rod 213, a first battery 215 is arranged on one side of the second connecting plate 212, the same displacement cylinder 217 is sleeved on the outer portions of the second threaded rod 213 and the sliding rod 214, the displacement cylinder 217 is vertically arranged, the displacement cylinder 217 is in threaded connection with the second threaded rod 213, the displacement cylinder 217 is in sliding connection with the sliding rod 214, the supporting member 230 is arranged at the bottom of the displacement cylinder 217, the transmission member 240 is arranged at the top of the displacement cylinder 217, the displacement cylinder 217 is hollow, the top end of the displacement cylinder 217 is arranged to be an opening, and the bottom end of the displacement cylinder 217 is sealed; the motor 216 drives the second threaded rod 213 to rotate, the second threaded rod 213 rotates to enable the displacement cylinder 217 to move along the length direction of the second threaded rod 213, and the displacement cylinder 217 drives the ball serving member 220, the supporting member 230 and the transmission member 240 to move synchronously, so that the position of serving balls is changed.

The transmission member 240 collects power generated when the second threaded rod 213 rotates to operate, the transmission member 240 includes a first bevel gear 241 coaxially sleeved outside the second threaded rod 213, the first bevel gear 241 is located inside the displacement cylinder 217, a protrusion for clamping the first bevel gear 241 is arranged inside the displacement cylinder 217, a slider 242 matched with the second guide groove 2131 is arranged on the inner circular surface of the first bevel gear 241, a connecting cylinder 249 is coaxially arranged on the top of the displacement cylinder 217, the connecting cylinder 249 is hollow inside, the top end of the connecting cylinder 249 is provided with an opening, the bottom end of the connecting cylinder 249 is sealed, a second bevel gear 243 is engaged on the top of the first bevel gear 241, the protrusion does not affect the rotation of the first bevel gear 241 and the protrusion limits the first bevel gear 241 and the second bevel gear 243 to move relatively, the axis of the second bevel gear 243 is vertical, a rotating shaft 244 is coaxially arranged at the top of the second bevel gear 243, the top end of the rotating shaft 244 penetrates through the bottom of a connecting cylinder 249 and extends to the inner cavity of the connecting cylinder 249, the rotating shaft 244 is movably connected with the connecting cylinder 249 through a second bearing, a rotating column 245 positioned in the inner cavity of the connecting cylinder 249 is coaxially arranged at the top of the rotating shaft 244, an inclined surface 246 is arranged at the top of the rotating column 245, a first limiting rod 248 which is horizontally arranged is arranged above the rotating column 245, two ends of the first limiting rod 248 are connected with the inner wall of the connecting cylinder 249, a top rod 247 vertically penetrates through one end of the first limiting rod 248, the top rod 247 is movably connected with the first limiting rod 248, the bottom of the top rod 247 abuts against the inclined surface 246, the ball serving member 220 is coaxially arranged at the top of the connecting cylinder 249, and the top rod 247 is movably connected with the ball serving member 220; the rotation of the second threaded rod 213 drives the first bevel gear 241 to rotate, the first bevel gear 241 drives the second bevel gear 243 to rotate, the second bevel gear 243 drives the rotating post 245 to rotate through the rotating shaft 244, and the rotating post 245 rotates to enable the top rod 247 to move up and down under the action of the inclined surface 246.

The ball serving component 220 comprises a solid column 221 coaxially arranged at the top of a connecting cylinder 249, a vertical guide hole 222 matched with a push rod 247 is vertically and upwards formed in the bottom of the solid column 221, the top of the push rod 247 extends into the vertical guide hole 222, a ball inlet 223 communicated with the vertical guide hole 222 is horizontally formed in one side of the solid column 221, the top surface of the push rod 247 is flush with the bottom of the ball inlet 223 when in the lowest position, a bent pipe 225 is coaxially arranged at one end, deviating from the vertical guide hole 222, of the ball inlet 223, the bent pipe 225 is bent upwards, a funnel 226 is arranged at the top end of the bent pipe 225, a plurality of tennis balls are loaded in the funnel 226, a horizontally arranged ball serving hole 224 is formed in the top end of the vertical guide hole 222, the top surface of the push rod 247 is flush with the bottom of the ball serving hole 224 when in the highest position, the direction of the ball serving hole 224 is perpendicular to the tennis net 150, the ball serving hole 224 penetrates through the solid column 221, a fan 228 used for blowing air into the ball serving hole 224 is arranged in one side of the solid column 221, deviating from the tennis net 150, a second battery 229 used for providing power for the blower 228 is arranged at the top of the solid column 221, a ball serving tube 227 is coaxially arranged at one end, away from the blower 228, of the ball serving hole 224, the ball serving tube 227 is positioned above the tennis net 150, a circular ring 2271 is coaxially arranged at the suspension end of the ball serving tube 227, the inner cavity of the circular ring 2271 is matched with the inner cavity of the ball serving tube 227, a circular ring groove 2272 is coaxially arranged outside one end, close to the ball serving tube 227, of the circular ring 2271, a lantern ring 2273 is coaxially and movably sleeved outside the circular ring 2271, a through hole 2274 is arranged at one end, close to the ball serving tube 227, of the lantern ring 2273, the through hole 2274 radially extends along the lantern ring 2273, a bolt 2275 is matched and arranged in the through hole 2274, the bottom end of the bolt 2275 extends into the circular ring groove 2272, the suspension end of the lantern ring 2273 and the suspension end of the circular ring 2271 are positioned on the same vertical plane, a connection ring 2273 suspension end of the lantern ring 2273 is coaxially arranged, a connection ring 2276, the inner cavity of the connection ring 2276 has a diameter equal to the diameter of the inner cavity of the connection ring 2273, one side of the inner circular surface of the connecting ring 2276 is provided with a mounting groove 2277, a rubber sheet 2278 is arranged in the mounting groove 2277 in a matching way, and one side of the rubber sheet 2278 facing the inner cavity of the connecting ring 2276 is provided with friction grains; when the top end of the ejector rod 247 is at the lowest point, tennis enters the vertical guide hole 222 through the tennis inlet hole 223 and stands at the top end of the ejector rod 247, the ejector rod 247 drives the tennis to rise to the tennis serving hole 224 to be blown out through the tennis serving hole 224 and the tennis serving pipe 227 by the fan 228 along with the rising of the ejector rod 247, when the tennis passes through the rubber sheet 2278, as the tennis is in the moment before the tennis is separated, the rubber sheet 2278 is rough, the inner wall of the connecting ring 2276 on the other side is smooth, the tennis can rotate, so that the training difficulty can be improved, the tennis level of a user can be improved, the connecting ring 2276 can be rotated to enable the rubber sheet 2278 to be positioned in different directions up, down, left and right, so that the tennis can be rotated in different directions, the training level of the user can be improved, when the tennis does not need to be rotated, the bolt 2275 is pulled out, the connecting ring 2276 and the lantern ring 2273 are taken down, and the hit service ball without rotation can be obtained.

In order to prevent the tennis training device from toppling under the action of gravity of the serving mechanism 20, the supporting member 230 is arranged to avoid the toppling, the supporting member 230 comprises a third threaded rod 231 coaxially arranged at the bottom of the displacement cylinder 217, a second threaded sleeve 232 is coaxially sleeved outside the bottom end of the third threaded rod 231, a disc 233 is coaxially arranged at the bottom end of the second threaded sleeve 232, and a plurality of universal wheels 234 are arranged at the bottom of the disc 233; the height adjustment can be performed by rotating the second threaded sleeve 232, which is convenient to follow the adjustment of the height adjustment mechanism 10, so that the universal wheel 234 is not suspended.

The ball practicing mechanism 30 comprises a first sleeve 310 coaxially sleeved outside a first threaded rod 130, the first sleeve 310 is movably connected with the first threaded rod 130 through a third bearing, the first sleeve 310 is located below a rotary sleeve 140, a second limiting rod 320 vertically extending downwards is arranged at the bottom of the first sleeve 310, a first guide groove 321 matched with the second limiting rod 320 is arranged outside a first threaded sleeve 120, the bottom end of the second limiting rod 320 is inserted into the first guide groove 321, a first connecting rod 330 is arranged on the outer circular surface of the first sleeve 310, the extending direction of the first connecting rod 330 is opposite to that of the second connecting plate 212, the first connecting rod 330 radially extends along the first sleeve 310, a vertically arranged spring 340 is arranged at the top of the suspension end of the first connecting rod 330, a horizontally arranged first connecting plate 350 is arranged at the top of the spring 340, a first round rod 360 is arranged at one end of the first connecting plate 350 away from the first sleeve 310, one end of the first connecting rod 360 adjacent to the first connecting rod 350 is in threaded connection with the first connecting plate 350, a suspension end of the first round rod 360 is provided with a horizontally arranged first round rod 380, a second limiting rod 380 is arranged at the end of a second round 382, a bent round tennis ball 380, a bent limit rod 380 is arranged between the second limiting rod 380 and a second round 380, a second limiting rod 380, a second round 380 is arranged round 380, a second limiting rod 380, a bent limit rod 380 is arranged round 380 and a second round 380; the limit tennis ball 390 is hit by a tennis racket, the limit tennis ball 390 retreats and transmits force to the spring 340, the spring 340 bends, then the spring 340 resets under the action of elastic force, a user can then hit the limit tennis ball 390, the limit tennis ball 390 is hit by the user, the user can train to hit the ball and can also train to shoot the rotary ball, and the first round rod 360 is in threaded connection with the first connecting plate 350, so that the direction of the limit tennis ball 390 can be changed by rotating the first round rod 360, and the shooting training of the rotary balls in different directions can be trained.

To be more perfect, the vertical guide hole 222, the goal hole 223 and the serve hole 224 are all matched with tennis balls; the tennis ball can pass through the tennis ball conveniently.

More perfectly, the first battery 215 is electrically connected with the motor 216, the blower 228 is electrically connected with the second battery 229, and the second connecting plate 212 is provided with a controller for controlling the operation of the motor 216 and the blower 228; a first battery 215 provides power to the motor 216 and a second battery 229 provides power to the fan 228.

When the tennis net is used in a spacious field, the tennis net 150 is unfolded, the first threaded rod 130 rotates to drive the rotating sleeve 140 to move by rotating the first threaded rod 130, the rotating sleeve 140 drives the tennis net 150 to rise or fall so as to be suitable for different people, then the motor 216 and the fan 228 are controlled to be started by the controller, the motor 216 drives the second threaded rod 213 to rotate, the second threaded rod 213 rotates to enable the displacement cylinder 217 to move along the length direction of the second threaded rod 213, meanwhile, the second threaded rod 213 rotates to drive the first bevel gear 241 to rotate, the first bevel gear 241 drives the second bevel gear 243 to rotate, the second bevel gear 243 drives the rotating column 245 to rotate through the rotating shaft 244, the rotating column 245 rotates to enable the ejector rod 247 to move up and down under the action of the inclined surface 246, when the top end of the ejector rod 247 is at the lowest point, tennis balls enter the vertical guide holes 222 through the ball inlet 223 and stand at the top end of the ejector rod 247, the ejector rod drives tennis balls to rise to the ball outlet 224 to be blown out through the ball outlet 224 by the fan 228 while power of the second threaded rod 213 is collected while moving left and right, so as to improve the fighting performance of a user, and left and right operation, and right operation are convenient for a user, and right combat field.

When tennis ball passes through the rubber piece 2278, because the tennis ball is just before the tennis ball is separated, the rubber piece 2278 is rough, the inner wall of the connecting ring 2276 at the other side is smooth, the tennis ball can rotate, so that a rotating ball is generated, the training difficulty can be improved, and the tennis ball level of a user can be improved conveniently.

When the ground is small, the user can hit the ball by hitting the limiting tennis ball 390 and can also exercise to shoot the rotary ball, and since the first round bar 360 is in threaded connection with the first connecting plate 350, the orientation of the limiting tennis ball 390 can be changed by rotating the first round bar 360, so that the shooting training of the rotary balls in different directions can be trained.

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.

Claims

1. A height adjustable tennis training apparatus, comprising: the height-adjusting mechanism (10), the ball serving mechanism (20) and the ball practicing mechanism (30), wherein the ball serving mechanism (20) and the ball practicing mechanism (30) are both arranged on the height-adjusting mechanism (10), the ball practicing mechanism (30) is movably connected with the height-adjusting mechanism (10), and the ball serving mechanism (20) is detachably connected with the height-adjusting mechanism (10);

the height adjusting mechanism (10) comprises two weight plates (110) which are horizontally arranged, first threaded sleeves (120) are coaxially arranged at the tops of the two weight plates (110), the two first threaded sleeves (120) are vertically arranged, first threaded rods (130) are coaxially and threadedly connected with inner cavities at the tops of the two first threaded sleeves (120), rotary sleeves (140) are coaxially sleeved outside the tops of the two first threaded rods (130), the rotary sleeves (140) are movably connected with the first threaded rods (130) through first bearings, a tennis net (150) is arranged between the two rotary sleeves (140), the tennis net (150) is elastically telescopic, connecting ropes (160) are arranged at four corners of the tennis net (150), two corners at the top of the tennis net (150) are connected with the tops of the rotary sleeves (140) through the connecting ropes (160), two corners at the bottom of the tennis net (150) are connected with the bottoms of the first threaded sleeves (120) through the connecting ropes (160), the ball serving mechanism (20) is connected with the sleeves (140), and the ball refining mechanism (30) is movably connected with the first threaded rods (130);

the ball serving mechanism (20) comprises a displacement member (210), a ball serving member (220), a supporting member (230) and a transmission member (240), wherein the displacement member (210) is connected with the rotating sleeves (140), the displacement member (210) is arranged between the two rotating sleeves (140), the transmission member (240) is connected with the displacement member (210), the supporting member (230) is arranged at the bottom of the displacement member (210), and the ball serving member (220) is arranged at the top of the transmission member (240);

the displacement member (210) comprises a second sleeve (211) coaxially sleeved at the bottom of the rotating sleeve (140), the second sleeve (211) is detachably connected with the rotating sleeve (140), a second connecting plate (212) is arranged on the same side of the two second sleeves (211), the two second connecting plates (212) are parallel to each other, a second threaded rod (213) and a sliding rod (214) are arranged between the two second connecting plates (212), the second threaded rod (213) and the sliding rod (214) are both perpendicular to the second connecting plates (212), the second threaded rod (213) is positioned above the sliding rod (214), the second threaded rod (213) is movably connected with the second connecting plates (212), the second threaded rod (213) does not displace during rotation, a plurality of second guide grooves (2131) are formed in the outer part of the second threaded rod (213) along the circumferential direction, the guide direction of the second guide grooves (2131) is parallel to the second threaded rod (213), the length of the second guide grooves (2131) is equal to the length of the second threaded rod (213), one end of the second threaded rod (213) is provided with a second connecting plate (212), a second threaded rod (217) coaxially sleeved with a battery (217), and a vertical connecting plate (214), the displacement cylinder (217) is in threaded connection with the second threaded rod (213), the displacement cylinder (217) is in sliding connection with the sliding rod (214), the supporting member (230) is arranged at the bottom of the displacement cylinder (217), the transmission member (240) is arranged at the top of the displacement cylinder (217), the displacement cylinder (217) is hollow, the top end of the displacement cylinder (217) is provided with an opening, and the bottom end of the displacement cylinder (217) is sealed;

the transmission member (240) comprises a first bevel gear (241) coaxially sleeved outside the second threaded rod (213), the first bevel gear (241) is positioned inside the displacement cylinder (217), a protrusion for clamping the first bevel gear (241) is arranged in the displacement cylinder (217), a sliding block (242) matched with the second guide groove (2131) is arranged on the inner circular surface of the first bevel gear (241), a connecting cylinder (249) is coaxially arranged at the top of the displacement cylinder (217), the connecting cylinder (249) is hollow, the top end of the connecting cylinder (249) is provided with an opening, the bottom end of the connecting cylinder (249) is sealed, a second bevel gear (243) is meshed at the top of the first bevel gear (241), the protrusion does not influence the rotation of the first bevel gear (241) and limits the first bevel gear (241) and the second bevel gear (243) to move relatively, the axis of the second bevel gear (243) is vertical, a rotating shaft (244) is coaxially arranged at the top of the second bevel gear (243), the top end of the rotating shaft (244) passes through the bottom of the connecting cylinder (249) and extends to an inner cavity of the connecting cylinder (245), the rotating shaft (244) is movably connected with the connecting cylinder (249), a rotating shaft (245), a horizontal plane (246) is arranged above the rotating shaft (245), two ends of a first limiting rod (248) are connected with the inner wall of a connecting cylinder (249), one end of the first limiting rod (248) vertically penetrates through a top rod (247), the top rod (247) is movably connected with the first limiting rod (248), the bottom of the top rod (247) abuts against an inclined surface (246), a ball serving component (220) is coaxially arranged at the top of the connecting cylinder (249), and the top rod (247) is movably connected with the ball serving component (220);

the ball serving member (220) comprises a solid column (221) coaxially arranged at the top of a connecting cylinder (249), a vertical guide hole (222) matched with a push rod (247) is vertically and upwards formed in the bottom of the solid column (221), the top of the push rod (247) extends into the vertical guide hole (222), a ball inlet hole (223) communicated with the vertical guide hole (222) is horizontally formed in one side of the solid column (221), the top surface of the push rod (247) is flush with the bottom of the ball inlet hole (223) when located at the lowest position, a bent pipe (225) is coaxially arranged at one end, deviating from the vertical guide hole (222), of the ball inlet hole (223), the bent pipe (225) bends upwards, a funnel (226) is arranged at the top end of the bent pipe (225), a plurality of tennis balls are loaded in the funnel (226), a ball serving hole (224) horizontally arranged is formed in the top end of the vertical guide hole (222), the top surface of the push rod (247) is flush with the bottom of the ball serving hole (224) when located at the highest position, the ball serving hole (224) is perpendicular to the tennis net (150) in the guide direction, a blower (228) is arranged on one end, which the blower (228) deviating from the top of the coaxial blower (228) for providing the electric power fan (228) for the electric power to the top of the electric blower (228) which is arranged in the electric blower (228), and the electric blower (228) which is arranged in the electric blower (228) 227 Serving tube (227) is located tennis net (150) top, serving tube (227) suspension end is coaxial to be provided with ring (2271), ring (2271) inner chamber and serving tube (227) inner chamber match, ring (2271) is close to the outside coaxial annular groove (2272) of having seted up of one end of serving tube (227), ring (2271) outside coaxial movable sleeve is equipped with lantern ring (2273), through hole (2274) has been seted up to the one end that lantern ring (2273) is close to serving tube (227), through hole (2274) radially extend along lantern ring (2273), the matching is provided with bolt (2275) in through hole (2274), bolt (2275) bottom stretches into in annular groove (2272), lantern ring (2273) suspension end and ring (2271) suspension end department are in same vertical plane, lantern ring (2273) suspension end is coaxial to be provided with go-between ring (2276), go-between ring (2276) inner chamber diameter equals lantern ring (2273) inner chamber diameter, go-between ring (2276) suspension end is provided with go-between ring (2277) matching mounting groove (2277), it is provided with the rubber piece (2278) one side to be provided with the rubber piece (2277).

2. A height adjustable tennis training apparatus as defined in claim 1, wherein: the supporting member (230) comprises a third threaded rod (231) coaxially arranged at the bottom of the displacement cylinder (217), a second threaded sleeve (232) is coaxially sleeved outside the bottom end of the third threaded rod (231), a disc (233) is coaxially arranged at the bottom end of the second threaded sleeve (232), and a plurality of universal wheels (234) are arranged at the bottom of the disc (233).

3. A height adjustable tennis training apparatus as defined in claim 1, wherein: the ball-milling mechanism (30) comprises a first sleeve (310) coaxially sleeved outside a first threaded rod (130), the first sleeve (310) is movably connected with the first threaded rod (130) through a third bearing, the first sleeve (310) is positioned below a rotating sleeve (140), a second limiting rod (320) vertically extending downwards is arranged at the bottom of the first sleeve (310), a first guide groove (321) matched with the second limiting rod (320) is arranged outside a first threaded sleeve (120), the bottom end of the second limiting rod (320) is inserted into the first guide groove (321), a first connecting rod (330) is arranged on the outer circular surface of the first sleeve (310), the extending direction of the first connecting rod (330) is opposite to that of the second connecting plate (212), the first connecting rod (330) radially extends along the first sleeve (310), a vertically arranged spring (340) is arranged at the top of the suspending end of the first connecting rod (330), a horizontally arranged first connecting plate (350) is arranged at the top of the spring (340), a first connecting plate (350) is provided with a first end of the first sleeve (310), a horizontally arranged bent rod (370) which is far away from the first threaded sleeve (350), a second connecting rod (370) is arranged on the suspending end of the first connecting plate (370), a horizontally arranged bent rod (370), a second connecting rod (370) which is arranged near the first connecting plate (360) and a second connecting rod (370) which is arranged near the first connecting plate (370), perpendicular first round bar (360) of second round bar (380), the outside cover of second round bar (380) is equipped with spacing tennis (390), and the outside cover of second round bar (380) is equipped with first spacing ring (381), stop bolt (382), and spacing tennis (390) are located between first spacing ring (381) and stop bolt (382), and stop bolt (382) are located second round bar (380) suspension end, stop bolt (382) and second round bar (380) threaded connection.

4. A height adjustable tennis training apparatus as defined in claim 1, wherein: the vertical guide hole (222), the ball inlet hole (223) and the ball serving hole (224) are matched with tennis balls.

5. A height adjustable tennis training apparatus as defined in claim 1, wherein: the first battery (215) is electrically connected with the motor (216), the fan (228) is electrically connected with the second battery (229), and the second connecting plate (212) is provided with a controller for controlling the operation of the motor (216) and the fan (228).