CN113577742B

CN113577742B - Sand bag for physical training

Info

Publication number: CN113577742B
Application number: CN202110759859.0A
Authority: CN
Inventors: 郭敏进
Original assignee: Hunan University of Arts and Science
Current assignee: Hunan University of Arts and Science
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-04-08
Anticipated expiration: 2041-07-05
Also published as: CN113577742A

Abstract

The invention relates to the technical field of sports equipment and discloses a sand bag for physical training, which comprises a sand bag body, wherein a bottom frame is arranged below the sand bag body, a vertical frame is integrally formed on the left side of the bottom frame, a top frame is integrally formed at the top of the vertical frame, the top frame is arranged above the sand bag body, box bodies are fixed at the top and the bottom of the sand bag body, and a through pipe is integrally formed between the two box bodies; want to fix the sand bag body when the user, prevent when hitting, lead to the sand bag body to appear rocking, when influencing the training, can start first driving motor through the PLC controller this moment and drive first lead screw and rotate, thereby can make the movable block and the baffle on it move to the right side, when the box body of baffle and below contacted, stop first driving motor this moment, then the user hits the sand bag body, the condition that rocks can not appear in the sand bag body this moment, thereby better user's training demand of satisfying.

Description

Sand bag for physical training

Technical Field

The invention relates to the technical field of sports equipment, in particular to a sand bag for sports training.

Background

Sports equipment, the various apparatus that sports match and body-building exercise used, the collective name of equipment and articles for use, sports equipment and sports interdependence, the mutual promotion, sports's popularization and sports item's diversification make sports equipment's kind, specification etc. all develop, along with sports item's diversification, the kind that leads to sports equipment also becomes more and more, when carrying out the sports training, often can use the sand bag to assist the user to train, traditional sand bag is after finishing using, unable timely disinfection and sterilization handles, lead to a large amount of viruses of easy adhesion and bacterium on its surface, when next user uses this sand bag to carry out the sports training, thereby cross infection's the condition appears easily.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a sand bag for physical training, which solves the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a sand bag for physical training comprises a sand bag body, wherein a bottom frame is arranged below the sand bag body, a vertical frame is integrally formed on the left side of the bottom frame, a top frame is integrally formed on the top of the vertical frame and positioned above the sand bag body, box bodies are respectively fixed on the top and the bottom of the sand bag body, a through pipe is integrally formed between the two box bodies, a double-shaft motor is fixed at the middle position inside the through pipe, shaft rods are respectively fixed at two output ends of the double-shaft motor, the opposite ends of the two shaft rods are respectively rotatably connected with the center of one side, away from the inside of the two box bodies, a driving gear is fixed on the outer side wall of each shaft rod, a plurality of driven gears are respectively connected with the outer side of the driving gear in a meshed manner, a screw rod is fixed at the middle part of each driven gear, one end, away from each driven gear, of the screw rod is rotatably connected with one side, close to the sand bag body, inside the box bodies, just the lateral wall threaded connection of screw rod has the thread bush, the lateral wall of thread bush is fixed with the connecting rod, the connecting rod is kept away from the one end of thread bush is fixed with the connecting block, the external fixed surface of connecting block has ultraviolet lamp, ultraviolet lamp keeps away from the one end of connecting block runs through to the outside of box body, ultraviolet lamp with screw rod parallel distribution, the inside of box body is close to screw rod department is fixed with the switch, the lateral wall of thread bush is relative connecting rod department is fixed with L type pole, the inside of sand bag body is fixed with a plurality of shock transducers, the left side of grudging post is fixed with the PLC controller, shock transducers with the biax motor all with PLC controller electric connection.

Preferably, an inclined support is fixed to the top of the right side of the vertical frame, and one end, far away from the vertical frame, of the inclined support is fixedly connected with the lower surface of the top frame.

Preferably, a plurality of extending bodies are fixed to the front surface and the rear surface of the chassis at equal distances.

Preferably, the underframe is of a hollow structure, a through groove is formed in the upper surface of the underframe, a first driving motor is fixed on the left side of the inside of the underframe, a first lead screw is fixed at the output end of the first driving motor, a moving block is in threaded connection with the outer side wall of the first lead screw, a baffle is arranged on the upper surface of the underframe, and the top of the moving block penetrates through the through groove and is fixedly connected with the lower surface of the baffle.

Preferably, the box body below and the through groove are distributed in an overlapping mode, and the height of the baffle is larger than the distance from the bottom of the box body below to the top of the bottom frame.

Preferably, the front surface and the rear surface of the moving block are respectively attached to the front surface and the rear surface of the inside of the through groove.

Preferably, the top frame is of a hollow structure with an opening at the right side, a low-speed motor is fixed on the right side of the lower surface of the top frame, a vertical shaft is fixed at the output end of the low-speed motor, a plurality of connecting ropes are fixed on the outer side wall of the vertical shaft at equal intervals, the bottom ends of the connecting ropes are fixedly connected with the upper surface of the box body, sliding grooves are formed in the front surface and the rear surface of the inner portion of the top frame, a second driving motor is fixed on the right side of the inner portion of each sliding groove, a second lead screw is fixed on the output end of the second driving motor, the left end of the second lead screw is rotatably connected with the left side of the inner portion of each sliding groove, sliding blocks are connected to the outer surface of the second lead screw in a threaded manner, long plates are fixed on the opposite sides of the two sliding blocks, the right ends of the two long plates extend to the right opening of the top frame, and brush plates are rotatably connected between the two long plates through bearings, the right end of the brush plate extends to the right opening of the top frame, and a plurality of soft bristles are fixed on the lower surface of the brush plate.

Preferably, the distance between the right side of the sliding block and the left side of the second driving motor is greater than the distance between the left side of the brush plate and the right side of the top frame, and the length of the brush plate is greater than or equal to the distance between the upper surface of the box body above and the lower surface of the box body below.

Preferably, one end of the ultraviolet lamp, which is far away from the connecting block, is fixed with a limiting disc, and the outer surface of the limiting disc is attached to the outer surface of the box body.

(III) advantageous effects

The invention provides a sand bag for physical training, which has the following beneficial effects:

(1) when the sand bag is used, when the vibration sensors in the sand bag body do not detect vibration signals within a certain time, the signals are fed back to the PLC, the PLC judges that no user continues to use the sand bag at the moment, the double-shaft motor is controlled to be started, the two shaft rods and the driving gear on the shaft rods are driven to rotate, the driven gears and the screw rods on the driven gears can be driven to rotate, the ultraviolet lamps extend out of the box body under the action of the threaded sleeve, the connecting rod and the connecting block, and after the ultraviolet lamps completely extend out of the box body, the L-shaped rod on the threaded sleeve presses the switch to turn on the ultraviolet lamps, so that the sand bag body can be sterilized, and the cross infection is avoided.

(2) When the sand bag body fixing device is used, a user wants to fix the sand bag body to prevent the sand bag body from shaking when hitting the sand bag body, and training is affected, the first driving motor can be started through the PLC controller to drive the first lead screw to rotate, so that the moving block and the baffle plate on the moving block can move towards the right side, when the baffle plate is in contact with the box body below, the first driving motor is stopped, then the user hits the sand bag body, and the sand bag body cannot shake at the moment, so that training requirements of the user are met better.

(3) According to the sand bag cleaning machine, the brush plate is arranged in the top frame, when the sand bag cleaning machine is used, the two second lead screws are respectively driven to rotate by the two second driving motors, so that the two sliding blocks can move towards the right side, the two long plates can extend to the outer part of the top frame, after the brush plate is completely moved out of the top frame, the brush plate can automatically rotate to be in a vertical state under the action of gravity, at the moment, a plurality of soft bristles on the brush plate can be attached to the sand bag body, meanwhile, the low-speed motors can drive the sand bag body to slowly rotate, and the surface of the sand bag body can be cleaned under the action of the plurality of bristles.

(4) The inclined strut is arranged between the vertical frame and the top frame, the plurality of extending bodies are uniformly fixed on the front surface and the rear surface of the bottom frame, the inclined strut can avoid the situation that the connection part between the vertical frame and the top frame is stressed too much to cause fracture easily between the vertical frame and the top frame after long-time use, and the plurality of extending bodies can increase the contact area between the bottom frame and the ground, so that the whole device can be supported on the ground more stably, and the situation that the device is easy to topple over in the use process is avoided.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the sandbag body and the box body according to the present invention;

FIG. 3 is a schematic view of the internal structure of the base frame according to the present invention;

fig. 4 is a bottom view of the inner structure of the top frame of the present invention.

In the figure: 1. erecting a frame; 2. a PLC controller; 3. a top frame; 4. bracing; 5. a low-speed motor; 6. a vertical axis; 7. connecting ropes; 8. a box body; 9. a sandbag body; 10. a chassis; 11. a through groove; 12. a baffle plate; 13. an extension body; 14. an ultraviolet lamp; 15. a shock sensor; 16. a limiting disc; 17. connecting blocks; 18. a connecting rod; 19. a driven gear; 20. a shaft lever; 21. a driving gear; 22. a threaded sleeve; 23. a screw; 24. a switch; 25. pipe passing; 26. a double-shaft motor; 27. a first drive motor; 28. a moving block; 29. a slider; 30. a chute; 31. a second lead screw; 32. a long plate; 33. brushing the board; 34. brushing; 35. a second drive motor; 36. an L-shaped rod; 37. a first lead screw.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present invention provides a technical solution: a sand bag for physical training comprises a sand bag body 9, a bottom frame 10 is arranged below the sand bag body 9, a vertical frame 1 is integrally formed on the left side of the bottom frame 10, a top frame 3 is integrally formed on the top of the vertical frame 1, the top frame 3 is positioned above the sand bag body 9, box bodies 8 are respectively fixed on the top and the bottom of the sand bag body 9, a through pipe 25 is integrally formed between the two box bodies 8, a double-shaft motor 26 is fixed in the middle of the inside of the through pipe 25, shaft rods 20 are respectively fixed on two output ends of the double-shaft motor 26, the back ends of the two shaft rods 20 are respectively rotatably connected with the center of one side, away from the inside of the two box bodies 8, a driving gear 21 is fixed on the outer side wall of each shaft rod 20, a plurality of driven gears 19 are respectively engaged and connected on the outer side of the driving gear 21, a screw rod 23 is fixed in the middle of the driven gear 19, one end, away from the driven gear 19, of the screw rod 23 is rotatably connected with one side, close to the sand bag body 9, inside the box body 8, and the outer side wall of the screw 23 is connected with a threaded sleeve 22 in a threaded manner, the outer side wall of the threaded sleeve 22 is fixed with a connecting rod 18, one end of the connecting rod 18, which is far away from the threaded sleeve 22, is fixed with a connecting block 17, the outer surface of the connecting block 17 is fixed with an ultraviolet lamp 14, one end of the ultraviolet lamp 14, which is far away from the connecting block 17, penetrates to the outside of the box body 8, the ultraviolet lamps 14 and the screw 23 are distributed in parallel, a switch 24 is fixed in the box body 8, which is close to the screw 23, an L-shaped rod 36 is fixed in the outer side wall of the threaded sleeve 22, which is opposite to the connecting rod 18, a plurality of vibration sensors 15 are fixed in the sandbag body 9, a PLC controller 2 is fixed on the left side of the stand 1, the vibration sensors 15 and a biaxial motor 26 are both electrically connected with the PLC controller 2, in the using process, when the plurality of vibration sensors 15 in the sandbag body 9 do not detect vibration signals within a period of time, the signals can be fed back to the PLC controller 2, the PLC controller 2 will determine that no user continues to hit the sandbag body 9, and will start the dual-shaft motor 26 to drive the two shaft rods 20 and the driving gear 21 thereon to rotate, so as to drive the plurality of driven gears 19 and the screws 23 thereon to rotate, so as to move the thread sleeves 22 on the screws 23, and under the action of the connecting rods 18 and the connecting blocks 17, the ultraviolet lamps 14 can extend out of the box body 8, after the ultraviolet lamps 14 completely extend out of the box body 8, the L-shaped rods 36 on the thread sleeves 22 will press the switches 24 to light the ultraviolet lamps 14, so as to timely sterilize and disinfect the sandbag body 9 when the user does not use the sandbag, thereby avoiding cross infection when the user uses the sandbag next time or uses different users, when the user uses the sandbag again, the user directly hits the sandbag body 9 with a fist, vibrations sensor 15 in the sand bag body 9 detects the vibration signal this moment to feed back PLC controller 2, PLC controller 2 judges someone uses the sand bag this moment, can control biax motor 26 again and start, and make a plurality of ultraviolet lamp 14 take in box body 8, from the use that does not influence the user.

Further, the bracing 4 is fixed with at the right side top of grudging post 1, and the bracing 4 is kept away from the one end of grudging post 1 and the lower fixed surface of roof-rack 3 and is connected, and bracing 4 can avoid the junction atress between grudging post 1 and the roof-rack 3 too big, leads to long-time use after, the easy cracked condition that takes place between grudging post 1 and the roof-rack 3.

Further, the front surface and the rear surface of chassis 10 are fixed with a plurality of extension 13 with equal distance, and a plurality of extension 13 can increase the area of contact of chassis 10 with ground to can guarantee that whole device is firm more and support subaerial, avoid at the in-process that uses, the easy condition of empting that takes place of device.

Further, the bottom frame 10 is of a hollow structure, the upper surface of the bottom frame 10 is provided with a through groove 11, the left side inside the bottom frame 10 is fixed with a first driving motor 27, the output end of the first driving motor 27 is fixed with a first lead screw 37, the outer side wall of the first lead screw 37 is in threaded connection with a moving block 28, the upper surface of the bottom frame 10 is provided with a baffle 12, the top of the moving block 28 penetrates through the through groove 11 and is fixedly connected with the lower surface of the baffle 12, when the sandbag body 9 is fixed by a user in use, the sandbag body 9 is prevented from shaking when the sandbag is hit, and when training is affected, the first driving motor 27 can be started by the PLC 2 to drive the first lead screw 37 to rotate, so that the moving block 28 and the baffle 12 thereon can move towards the right side, when the baffle 12 is in contact with the box body 8 below, the first driving motor 27 is stopped at this time, then the user hits the sandbag body 9, and the condition of rocking can not appear in sandbag body 9 this moment to better satisfy user's training demand.

Further, box body 8 and the logical groove 11 overlap of below distribute, and the height of baffle 12 is greater than the distance between 8 bottoms of below box body to the chassis 10 top, and the baffle 12 of being convenient for can be contacted with box body 8 of below each other to can block sandbag body 9.

Further, the front surface and the rear surface of moving block 28 are respectively attached to the front surface and the rear surface of the inside of through groove 11, so that the situation that moving block 28 is driven to rotate when first lead screw 37 rotates is avoided.

Further, the top frame 3 is a hollow structure with an opening at the right side, the lower surface right side of the top frame 3 is fixed with a low-speed motor 5, the output end of the low-speed motor 5 is fixed with a vertical shaft 6, the outer side wall of the vertical shaft 6 is fixed with a plurality of connecting ropes 7 at equal intervals, the bottom ends of the connecting ropes 7 are fixedly connected with the upper surface of the upper box body 8, the inner front surface and the inner rear surface of the top frame 3 are both provided with chutes 30, the inner right sides of the two chutes 30 are both fixed with second driving motors 35, the output end of the second driving motor 35 is fixed with a second lead screw 31, the left end of the second lead screw 31 is rotatably connected with the inner left side of the chute 30, the outer surface of the second lead screw 31 is connected with sliders 29 through threads, the opposite sides of the two sliders 29 are both fixed with long plates 32, the right ends of the two long plates 32 extend to the right opening of the top frame 3, and a brush plate 33 is rotatably connected between the two long plates 32 through a bearing, the right-hand member of brush board 33 extends to the right side opening part of roof-rack 3, and the lower surface of brush board 33 is fixed with a plurality of soft brush hairs 34, when using, drive two second lead screws 31 through two second driving motor 35 respectively and rotate, thereby can two sliders 29 move to the right side, thereby can make two long boards 32 extend to the outside of roof-rack 10, after brush board 33 shifts out from roof-rack 10 completely, under the effect of gravity, brush board 10 can be automatic rotates vertical state, a plurality of soft brush hairs 34 on the brush board 10 can laminate on sand bag body 9 this moment, low-speed motor 5 can drive sand bag body 9 slow rotation simultaneously, under a plurality of brush hairs 34's effect, can be with the surperficial clean up of sand bag body 9, when using again, second driving motor 35 starts, thereby can retrieve the inside of roof-rack 10 again with brush board 33.

Further, the distance between the right side of the sliding block 29 and the left side of the second driving motor 35 is greater than the distance between the left side of the brush plate 33 and the right side of the top frame 3, the length of the brush plate 33 is greater than or equal to the distance between the upper surface of the upper box body 8 and the lower surface of the lower box body 8, so that the bristles 34 on the brush plate 33 can be in contact with the surface of the sandbag body 9, and the surface of the sandbag body 9 can be cleaned.

Further, the one end that connecting block 17 was kept away from to ultraviolet lamp 14 is fixed with spacing dish 16, and the surface of spacing dish 16 is laminated with the surface of box body 8 mutually, and when ultraviolet lamp 14 took in the box body 8, spacing dish 16 can shelter from the export that supplies ultraviolet lamp 14 to advance, avoids external dust and impurity to enter into the inside of box body 8.

In conclusion, the working process of the invention is as follows: in the using process, when the plurality of vibration sensors 15 in the sandbag body 9 do not detect a vibration signal within a period of time, the signal is fed back to the PLC controller 2, the PLC controller 2 determines that no user continues to hit the sandbag body 9, the dual-shaft motor 26 is started to drive the two shaft rods 20 and the driving gear 21 thereon to rotate, so as to drive the plurality of driven gears 19 and the screw rods 23 thereon to rotate, so as to move the thread sleeves 22 on the screw rods 23, and under the action of the connecting rod 18 and the connecting block 17, the ultraviolet lamp 14 can extend out of the box body 8, when the ultraviolet lamp 14 completely extends out of the box body 8, the L-shaped rod 36 on the thread sleeve 22 presses the switch 24 to light the ultraviolet lamp 14, so that the sandbag body 9 can be sterilized and disinfected in time when the user does not use the sandbag, the situation of cross infection is avoided when the sandbag is used next time or used by different users, when the sandbag is used again, a user directly punches the sandbag body 9, the vibration sensor 15 in the sandbag body 9 detects a vibration signal and feeds the vibration signal back to the PLC controller 2, the PLC controller 2 judges that a person uses the sandbag at the moment, the double-shaft motor 26 is controlled to be started again, the ultraviolet lamps 14 are led into the box body 8, the use of the user is not influenced, when the user wants to fix the sandbag body 9, the sandbag body 9 is prevented from shaking when the sandbag is punched, and the training is influenced, the PLC controller 2 can be used for starting the first driving motor 27 to drive the first lead screw 37 to rotate, so that the moving block 28 and the baffle plate 12 on the moving block can move towards the right side, when the baffle plate 12 is contacted with the box body 8 below, stop first driving motor 27 this moment, then the user hits the sand bag body 9, and the condition of rocking can not appear in sand bag body 9 this moment to better satisfy user's training demand.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sand bag for sports training, includes sand bag body (9), its characterized in that: a bottom frame (10) is arranged below the sandbag body (9), a vertical frame (1) is integrally formed on the left side of the bottom frame (10), a top frame (3) is integrally formed on the top of the vertical frame (1), the top frame (3) is positioned above the sandbag body (9), box bodies (8) are fixed to the top and the bottom of the sandbag body (9), a through pipe (25) is integrally formed between the two box bodies (8), a double-shaft motor (26) is fixed to the middle position inside the through pipe (25), shaft rods (20) are fixed to two output ends of the double-shaft motor (26), the back ends of the two shaft rods (20) are rotatably connected with the center of one side, far away from each other, of the insides of the two box bodies (8), a driving gear (21) is fixed to the outer side walls of the two shaft rods (20), and a plurality of driven gears (19) are meshed with the outer side of the driving gear (21), the middle part of driven gear (19) is fixed with screw rod (23), the one end that driven gear (19) was kept away from in screw rod (23) with box body (8) is inside to be close to one side rotation connection of sand bag body (9), just the lateral wall threaded connection of screw rod (23) has thread bush (22), the lateral wall of thread bush (22) is fixed with connecting rod (18), connecting rod (18) are kept away from the one end of thread bush (22) is fixed with connecting block (17), the external surface of connecting block (17) is fixed with ultraviolet lamp (14), ultraviolet lamp (14) are kept away from the one end of connecting block (17) runs through to the outside of box body (8), just ultraviolet lamp (14) with screw rod (23) parallel distribution, the inside of box body (8) is close to screw rod (23) department is fixed with switch (24), the lateral wall of thread bush (22) is relative connecting rod (18) department is fixed with L type pole (36), the inside of sand bag body (9) is fixed with a plurality of vibrations sensor (15), the left side of grudging post (1) is fixed with PLC controller (2), vibrations sensor (15) with double-shaft motor (26) all with PLC controller (2) electric connection.

2. A sports training sandbag according to claim 1, wherein: the right side top of grudging post (1) is fixed with bracing (4), bracing (4) are kept away from the one end of grudging post (1) with the lower fixed surface of roof-rack (3) is connected.

3. A sports training sandbag according to claim 1, wherein: a plurality of extending bodies (13) are fixed on the front surface and the rear surface of the chassis (10) at equal intervals.

4. A sports training sandbag according to claim 1, wherein: the improved bicycle frame is characterized in that the bottom frame (10) is of a hollow structure, a through groove (11) is formed in the upper surface of the bottom frame (10), a first driving motor (27) is fixed to the left side of the inside of the bottom frame (10), a first lead screw (37) is fixed to the output end of the first driving motor (27), a moving block (28) is connected to the outer side wall of the first lead screw (37) in a threaded mode, a baffle (12) is arranged on the upper surface of the bottom frame (10), and the top of the moving block (28) penetrates through the through groove (11) and is fixedly connected with the lower surface of the baffle (12).

5. A sports training sandbag according to claim 4, wherein: the box body (8) below and the through groove (11) are distributed in an overlapping mode, and the height of the baffle (12) is larger than the distance from the bottom of the box body (8) below to the top of the bottom frame (10).

6. A sports training sandbag according to claim 5, wherein: the front surface and the rear surface of the moving block (28) are respectively attached to the front surface and the rear surface of the interior of the through groove (11).

7. A sports training sandbag according to claim 1, wherein: the top frame (3) is of a hollow structure with an opening at the right side, a low-speed motor (5) is fixed on the right side of the lower surface of the top frame (3), a vertical shaft (6) is fixed at the output end of the low-speed motor (5), a plurality of connecting ropes (7) are fixed on the outer side wall of the vertical shaft (6) at equal intervals, the bottom ends of the connecting ropes (7) are fixedly connected with the upper surface of the box body (8), sliding grooves (30) are formed in the front inner surface and the rear inner surface of the top frame (3), a second driving motor (35) is fixed on the right side of the inner part of each sliding groove (30), a second lead screw (31) is fixed at the output end of each second driving motor (35), the left end of each second lead screw (31) is rotatably connected with the left inner side of each sliding groove (30), and a sliding block (29) is in threaded connection with the outer surface of each second lead screw (31), two the opposite side of slider (29) all is fixed with long board (32), two the right-hand member of long board (32) all extends to the right side opening part of roof-rack (3), and two be connected with brush board (33) through the bearing rotation between long board (32), the right-hand member of brush board (33) extends to the right side opening part of roof-rack (3), just the lower fixed surface of brush board (33) has a plurality of soft brush hairs (34).

8. A sports training sandbag according to claim 7, wherein: the distance between the right side of the sliding block (29) and the left side of the second driving motor (35) is larger than the distance between the left side of the brush plate (33) and the right side of the top frame (3), and the length of the brush plate (33) is larger than or equal to the distance between the upper surface of the box body (8) and the lower surface of the box body (8).

9. A sports training sandbag according to claim 7, wherein: the ultraviolet lamp (14) is far away from one end of the connecting block (17) is fixed with a limiting disc (16), and the outer surface of the limiting disc (16) is attached to the outer surface of the box body (8).