CN114618146A

CN114618146A - Boxing sandbag

Info

Publication number: CN114618146A
Application number: CN202210270641.3A
Authority: CN
Inventors: 蒋沁攸; 狄君妃
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-06-14

Abstract

The invention provides a boxing sandbag, and belongs to the field of sports goods. The boxing sandbag comprises a water storage barrel and a support barrel, wherein the water storage barrel comprises a barrel body and a barrel cover, a water inlet is formed in the barrel cover, a flexible hitting body is installed outside the support barrel, a connecting barrel is vertically arranged between the support barrel and the barrel cover, the support barrel is connected with the upper end of the connecting barrel, the lower end of the connecting barrel is fixedly connected with the barrel cover, a rubber block is clamped between the lower end of the connecting barrel and the barrel cover, an air guide pipe is fixedly arranged in the barrel body, the air guide pipe consists of a pipe section I and a pipe section II which are horizontally arranged, an air inlet hole is horizontally formed in the barrel body in a penetrating mode, the pipe section I is inserted into the air inlet hole, the rubber block is annular, the pipe section extends upwards into the connecting barrel, the rubber block is sleeved on the pipe section II, and the inner wall of the rubber block is attached to the outer wall to form sealing; the second pipe section is fixed with a heat radiation fan with an inlet communicated with the second pipe section, the heat radiation fan is arranged in the connecting cylinder, the upper end of the connecting cylinder is closed, and the side wall of the connecting cylinder is densely provided with exhaust holes which are arranged in a penetrating way. This boxing sandbag possesses the function of blowing.

Description

Boxing sandbag

Technical Field

The invention belongs to the technical field of sports goods, and relates to a boxing sandbag, in particular to a vertical boxing sandbag.

Background

The boxing sandbag is used as a traditional body-building sports apparatus and widely used by a large number of body-building people, particularly martial arts amateurs.

The conventional sandbag is vertical boxing equipment (application number: 201720720749.2) disclosed in a Chinese patent library, and comprises a base, a cushioning structure and a sandbag body, wherein the cushioning structure is connected with the base and the sandbag body and comprises at least three shock absorbers and upright posts, and the shock absorbers are uniformly distributed around the upright posts; the center of the interior of the sandbag body is provided with a central tube, and the central tube is fixedly connected with the stand column.

The user is at the motion in-process, because the exercise amount is great can lead to the whole body to generate heat sweat, and at this moment, the user can only dispel the heat with the help of indoor fan or air conditioner, and traditional sand bag does not possess the heat dissipation function.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a boxing sandbag with a blowing function.

The purpose of the invention can be realized by the following technical scheme: a boxing sandbag comprises a water storage barrel and a support barrel vertically arranged on the water storage barrel, wherein the water storage barrel comprises a barrel body and a barrel cover, a water inlet is formed in the barrel cover, a flexible striking body is installed outside the support barrel, a connecting barrel is vertically arranged between the support barrel and the barrel cover, the support barrel is connected with the upper end of the connecting barrel through a connecting structure, the lower end of the connecting barrel is fixedly connected with the barrel cover, and a rubber block is clamped between the lower end of the connecting barrel and the barrel cover; the rubber block is annular, the pipe section extends upwards into the connecting cylinder, the rubber block is sleeved on the pipe section II, and the inner wall of the rubber block is attached to the outer wall of the pipe section to form sealing; and a heat radiation fan with an inlet communicated with the pipe section II is fixed on the pipe section II, the heat radiation fan is positioned in the connecting cylinder, the upper end of the connecting cylinder is closed, and exhaust holes which are arranged in a penetrating way are densely distributed on the side wall of the connecting cylinder.

The using process is as follows: the radiator fan operation, outside gas gets into the air duct through the inlet port, by radiator fan export discharge connecting cylinder, finally discharges fast through the exhaust hole to blow to the user, realize the cooling, improve whole product experience.

The blowing mechanism composed of the air duct, the heat radiation fan and the like is completely hidden inside the boxing sandbag, and the direct contact between the human body and the blowing mechanism can be avoided on the premise of not increasing the whole volume of the boxing sandbag, so that the safety is high.

Secondly, the vast majority of air duct is arranged in the base that is full of water, can carry out abundant cooling to the gas that gets into in the air duct, reduces exhaust hole department gas temperature, plays better cooling effect, and whole experience is better.

In foretell boxing sand bag, the lower extreme of connecting cylinder has annular blank pressing, and the upper and lower both sides face of block rubber sticiss respectively on annular blank pressing and bung, integrated into one piece has the annular connecting seat that is on the outer wall of foretell second pipeline section, and the side face sticiss on the connecting seat on the annular blank pressing, connecting seat, annular blank pressing, block rubber and bung are linked firmly through the cooperation of bolt and nut, and the axis of bolt is parallel with second pipeline section, and the bolt has two at least and along the pipe section week circumference equipartition, and nut and bolt quantity are the same and the position one-to-one. In this application, utilize the bolt and nut cooperation to make air duct, connecting cylinder and rubber block synchronous positioning, so not only can the significantly reduced spare part drop into, simplify the structure, can effectively reduce operating procedure moreover, do benefit to the equipment.

In foretell boxing sand bag, seted up the ring channel on the inner wall of inlet port, be equipped with the sealing washer in the ring channel, and the inside wall of sealing washer offsets with the lateral wall of pipeline section one, makes to form reliably sealed between air duct and the staving, strengthens whole job stabilization nature.

In foretell boxing sand bag, under the connection structure effect, a support section of thick bamboo can slide from top to bottom and lock in sliding position to change flexible hitting body height, the crowd that adapts to different heights uses, and the suitability is higher.

In the boxing sandbag, the connecting structure comprises a vertically arranged mounting cylinder, the supporting cylinder is sleeved on the mounting cylinder, and the lower end of the mounting cylinder is fixedly connected with the connecting cylinder; rack parts which are vertically arranged are formed on two sides of the mounting cylinder, and two shifting blocks which are respectively opposite to the two rack parts are arranged below the supporting cylinder; a shaft part horizontally arranged and a tooth part matched with the rack part are formed on the shifting block, the tooth part is positioned between the shifting block and the rack part, and the shifting block is hinged with the support cylinder through the shaft part so that the tooth part is close to or far away from the rack part; springs which enable the tooth parts and the corresponding rack parts to have a meshing trend are arranged between the two shifting blocks and the supporting cylinder.

The height of the flexible striking body is adjusted in the following way: overcome spring force swing through external force drive shifting block and make tooth portion and rack portion separate, adjust flexible striking body to suitable height after that, then lift off external force and make tooth portion and rack portion re-engage under the spring action, lock flexible striking body, accomplish flexible striking body height control.

This sand bag passes through tooth portion and the cooperation of rack portion and realizes that flexible striking body height is adjusted, under the flexible striking body prerequisite of stable locking, through the interdental clearance of rack portion continuous distribution in vertical direction again, makes the shifting block possess the ability that the large-span removed and the small-span removed simultaneously, makes flexible striking body height adjust more meticulously to the different height crowds of adaptation use better, experience is better.

In foretell boxing sand bag, foretell shifting block is the bar and length extends along rack portion width direction, and the cross section of shifting block roughly is the U-shaped, and shifting block width both sides are first lateral wall and the second lateral wall that possesses tooth portion respectively, and the equal shaping of shifting block length both sides has above-mentioned axial region, is favorable to operating personnel to smoothly stir the shifting block, strengthens experience.

In foretell boxing sand bag, foretell first lateral wall is the slope setting so that the distance between the shifting block width both sides diminishes gradually downwards, more does benefit to operating personnel and stirs the shifting block.

In the boxing sandbag, the lower end of the supporting cylinder extends into the shifting block, the two springs are respectively and horizontally arranged in the two shifting blocks, and the two ends of each spring are respectively pressed on the inner wall of the shifting block and the inner wall of the supporting cylinder. Support a lower extreme and spring and all be in shifting the piece, not only make overall structure comparatively compact, reduce the space and occupy, hide the spring in addition, play the guard action, effectively avoid the spring to receive external environment to disturb, strengthen sand bag overall structure stability.

In foretell boxing sand bag, the shaping has the baffle of vertical setting on the inner wall of a support section of thick bamboo lower extreme, and dials a length both sides and all is equipped with foretell baffle, all is equipped with the jack that matches with the axial region on every baffle, and the axial region is pegged graft in corresponding the jack. By adopting the design, the device has the advantages of simple structure and convenience in installation.

In foretell boxing sand bag, the vertical guide arm that is fixed with in the support section of thick bamboo, and the guide arm lower extreme passes installation section of thick bamboo upper port, and installation section of thick bamboo upper port is squarely, the guide arm for with the square pole form of installation section of thick bamboo upper port matching, and the guide arm lateral wall pastes with installation section of thick bamboo upper port inner wall and pastes and lean on. The upper port of the guide rod and the upper port of the installation cylinder are matched, so that the installation position of the flexible striking body is determined, the assembly is convenient, the height adjustment and the guiding of the flexible striking body are realized, the striking body can only move up and down, and the stable work is ensured.

In foretell boxing sand bag, the shaping of a support section of thick bamboo lower extreme outside has and should support the coaxial fender ring of a section of thick bamboo, and the shaping of fender ring upper end has the annular turn-ups that is used for supporting the flexible body of hitting, and the shifting block is in and keeps off the ring inboard, and is equipped with the breach that supplies first lateral wall to stretch out on keeping off the ring lateral wall, and the shaping has the portion of gripping on the first lateral wall. The shifting block is positioned on the inner side of the retaining ring, and a notch is arranged on the retaining ring to operate the shifting block, so that the shifting block can be hidden to avoid misoperation.

In foretell boxing sandbag, keep off the ring and be the toper and the diameter diminishes downwards gradually, keep off ring inclination and first lateral wall the same, and under the spring action, first lateral wall is in the breach. On the premise of not influencing the swing of the shifting block, the shifting block can be better protected to prevent misoperation.

In the boxing sandbag, the holding part is a holding opening penetrating through the first side wall, and the axial direction of the holding opening is vertical to the inclined direction of the first side wall.

Alternatively, in the boxing sandbag, the holding part is a bump formed on the outer wall of the first side wall.

In the boxing sandbag, a convex column matched with the spring is formed on the inner side wall of the lower end of the supporting cylinder, and one end of the spring is sleeved on the convex column to enhance the running stability of the spring.

Compared with the prior art, the boxing sandbag has the following advantages:

1. the blowing mechanism composed of the air duct, the heat dissipation fan and the like is completely hidden inside the boxing sandbag, so that the direct contact between a human body and the blowing mechanism can be avoided on the premise of not increasing the whole volume of the boxing sandbag, and the safety is high.

2. The vast majority of air ducts is arranged in the base filled with water, and can fully cool the gas entering the air ducts, so that the gas temperature at the exhaust holes is reduced, a better cooling effect is achieved, and the whole experience is better.

3. This sand bag passes through tooth portion and the cooperation of rack portion and realizes that flexible striking body height is adjusted, under the flexible striking body prerequisite of stable locking, through the interdental clearance of rack portion continuous distribution in vertical direction again, makes the shifting block possess the ability that the large-span removed and the small-span removed simultaneously, makes flexible striking body height adjust more meticulously to the different height crowds of adaptation use better, experience is better.

4. The rubber block both has been used for buffering flexible hitting body atress, is used for sealed air duct and bung junction again, and in this application, the rubber block possesses a dual-purpose effect of thing promptly, when simplifying the structure, the equipment of being convenient for.

Drawings

Fig. 1 is a schematic structural view of a boxing sandbag.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure at B in fig. 1.

Fig. 4 is an enlarged schematic view of the structure at C in fig. 1.

Fig. 5 is a schematic structural view of the dial block.

Fig. 6 is a schematic structural view of the support cylinder.

In the figure, 1, a water storage barrel; 1a, a barrel body; 1b, a barrel cover; 2. a support cylinder; 2a, a convex column; 2b, a baffle plate; 2c, a baffle ring; 2d, annular flanging; 3. a connecting cylinder; 3a, an exhaust hole; 3b, annular blank pressing; 4. a rubber block; 5. a plug; 6. a flexible striking body; 7. an air duct; 7a, a first pipe section; 7b, a second pipe section; 7c, a connecting seat; 8. a heat radiation fan; 9. a bolt; 10. a nut; 11. a seal ring; 12. mounting the cylinder; 12a, a rack portion; 13. shifting blocks; 13a, a shaft portion; 13b, tooth parts; 13c, a first side wall; 13d, a holding opening; 14. a spring; 15. pressing a ring; 16. a guide rod.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figure 1, the boxing sandbag comprises a water storage barrel 1, a support barrel 2, a connecting barrel 3 and a rubber block 4.

Wherein,

the water storage barrel 1 comprises a barrel body 1a with an opening at the upper end and a barrel cover 1b for sealing the upper end opening of the barrel body 1a, and the barrel body 1a and the barrel cover 1b are preferably fixedly connected through screws. A water inlet is vertically penetrated through the barrel cover 1b so as to fill water into the barrel body 1a through the water inlet. In the actual product, a plug 5 for plugging the water inlet is fixed at the water inlet.

The supporting cylinder 2 is vertically arranged and is positioned above the water storage barrel 1. The support cylinder 2 is externally provided with a flexible striking body 6, and generally, the flexible striking body 6 is cylindrical and is sleeved outside the support cylinder 2. The flexible striking body 6 is generally made of pearl wool and is externally wrapped by cloth. Typically, the flexible striking body 6 is fixedly connected to the support cylinder 2 by means of bonding. Naturally, the flexible striking body 6 may also be made of other flexible materials such as rubber.

The upper end of the connecting cylinder 3 is closed, the lower end is opened, and the side wall of the connecting cylinder 3 is densely provided with vent holes 3a which are arranged in a penetrating way. The connecting cylinder 3 is arranged between the supporting cylinder 2 and the barrel cover 1b, and the connecting cylinder 3 and the supporting cylinder 2 are coaxially arranged. Support section of thick bamboo 2 and be connected through connection structure and 3 upper ends of connecting cylinder to under the connection structure effect, support section of thick bamboo 2 can slide from top to bottom and lock at sliding position, with the 6 height of the flexible body of hitting of change, the crowd of adaptation different heights uses, and the suitability is higher.

As shown in fig. 3, the rubber block 4 is annular and disposed between the connecting cylinder 3 and the barrel cover 1b, and the upper and lower side surfaces of the rubber block 4 are respectively pressed on the barrel cover 1b and the connecting cylinder 3 for buffering the stress of the flexible striking body 6. In this embodiment, the connecting cylinder 3 is a split structure, and includes a main body in a barrel shape and a ring-shaped edge 3b fixedly arranged at the lower end of the main body, the exhaust hole 3a is arranged on the main body, and the upper and lower side surfaces of the rubber block 4 are respectively pressed on the ring-shaped edge 3b and the barrel cover 1 b. Preferably, the annular blank pressing 3b is fixedly connected with the main body in a welding and sealing mode. Naturally, it is also possible that the annular beads 3b and the connecting cylinder 3 are of one-piece construction.

Further, a positioning cavity with the shape and the size matched with the rubber block 4 is formed between the annular pressing edge 3b and the barrel cover 1b, so that the annular pressing edge 3b and the barrel cover 1b are better attached to the rubber block 4, and the buffering effect of the rubber block 4 is fully exerted.

As shown in fig. 1 and 3, an L-shaped air duct 7 made of a heat conductive material is fixedly arranged in the barrel body 1a, and the air duct 7 is made of an aluminum alloy or stainless steel material. The air duct 7 is of an integrated structure and consists of a first horizontally arranged pipe section 7a and a second vertically arranged pipe section 7 b. An air inlet hole horizontally penetrates through the barrel body 1a, the first pipe section 7a is inserted into the air inlet hole, and sealing is formed between the outer wall of the first pipe section 7a and the inner wall of the air inlet hole. The second pipe section 7b sequentially penetrates through the barrel cover 1b and the rubber block 4 and extends into the connecting cylinder 3, at the moment, the rubber block 4 and the annular blank holder 3b are sleeved on the second pipe section 7b, and the inner wall of the rubber block 4 is attached to the outer wall of the second pipe section 7b to form sealing; and a heat radiation fan 8 with an inlet communicated with the second pipe section 7b is fixed on the second pipe section, and the heat radiation fan 8 is positioned in the connecting cylinder 3. The radiator fan 8 is an existing product, which is commercially available, and preferably, the radiator fan 8 and the second pipe section 7b are connected by flanges. The using process is as follows: 8 operation of radiator fan, outside gas gets into air duct 7 through the inlet port, discharges into connecting cylinder 3 by 8 exports of radiator fan, finally discharges fast through exhaust hole 3a to blow to the user, realize the cooling, improve whole product experience.

In the present embodiment, it is preferred that,

the airway tube 7 is positioned as follows: an annular connecting seat 7c is integrally formed on the outer wall of the second pipe section 7b, and the upper side face of the annular blank pressing 3b is tightly pressed on the connecting seat 7 c. The connecting seat 7c, the annular blank pressing 3b, the rubber block 4 and the barrel cover 1b are fixedly connected through the bolt 9 and the nut 10 in a matched mode, and the axis of the bolt 9 is parallel to the second pipe section 7 b. At least two bolts 9 are uniformly distributed along the circumferential direction of the second pipe section 7b, and the nuts 10 and the bolts 9 are the same in number and are in one-to-one correspondence in position. In this application, utilize the cooperation of bolt 9 nut 10 to make air duct 7, connecting cylinder 3 and block rubber 4 synchronous positioning, so not only can the spare part that significantly reduces drop into, simplify the structure, can effectively reduce operating procedure moreover, do benefit to the equipment.

The first pipe section 7a and the barrel body 1a are sealed in the following manner: as shown in fig. 4, an annular groove is formed in the inner wall of the air inlet, a sealing ring 11 is arranged in the annular groove, and the inner side wall of the sealing ring 11 abuts against the outer side wall of the first pipe section 7a, so that reliable sealing is formed between the air guide pipe 7 and the barrel body 1a, and the overall working stability is enhanced.

The connection structure is as follows: as shown in fig. 2, 5 and 6, the device comprises a vertically arranged installation cylinder 12, wherein the support cylinder 2 is sleeved on the installation cylinder 12, and the lower end of the installation cylinder 12 is fixedly connected with the connecting cylinder 3. The rack parts 12a which are vertically arranged are formed on the two sides of the mounting barrel 12, and two shifting blocks 13 which are respectively opposite to the two rack parts 12a are arranged below the supporting barrel 2. A shaft part 13a horizontally arranged and a tooth part 13b matched with the rack part 12a are formed on the shifting block 13, the tooth part 13b is positioned between the shifting block 13 and the rack part 12a, and the shifting block 13 is hinged with the supporting cylinder 2 through the shaft part 13a so that the tooth part 13b is close to or far away from the rack part 12 a; springs 14 for urging the teeth 13b and the corresponding rack 12a to mesh with each other are provided between the two blocks 13 and the support tube 2. The height of the flexible striking body 6 is adjusted as follows: the shifting block 13 is driven by external force to overcome the elastic force of the spring 14 to swing so as to separate the tooth part 13b from the rack part 12a, then the flexible striking body 6 is adjusted to a proper height, then the external force is removed so that the tooth part 13b and the rack part 12a are re-meshed under the action of the spring 14, the flexible striking body 6 is locked, and the height adjustment of the flexible striking body 6 is completed.

This sand bag passes through tooth portion 13b and the cooperation of rack portion 12a and realizes that flexible striking body 6 altitude mixture control, under the flexible striking body 6 prerequisite of stable locking, through the intertooth clearance of rack portion 12a continuous distribution in vertical direction again, makes shifting block 13 possess the ability that the large-span removed and the small-span removed simultaneously, makes flexible striking body 6 altitude mixture control more meticulous to the different height crowds of adaptation use better experience is better.

In particular, the present invention relates to a method for producing,

the structure of the shifting block 13 is as follows: as shown in fig. 5, the shifting block 13 is strip-shaped, the length of the shifting block extends along the width direction of the rack portion 12a, the cross section of the shifting block 13 is approximately U-shaped, the two sides of the width of the shifting block 13 are respectively a first side wall 13c and a second side wall with a tooth portion 13b, and the two sides of the length of the shifting block 13 are both formed with the shaft portions 13a, so that the shifting block 13 can be smoothly shifted by an operator, and the experience is enhanced.

Wherein, first lateral wall 13c is the slope setting so that the distance between the both sides of shifting block 13 width diminishes downwards gradually, more does benefit to operating personnel and stirs shifting block 13.

As shown in fig. 2, the spring 14 is mounted as follows: the lower end of the supporting cylinder 2 extends into the shifting block 13, the two springs 14 are respectively horizontally arranged in the two shifting blocks 13, and the two ends of the springs 14 are respectively pressed on the inner wall of the shifting block 13 and the inner wall of the supporting cylinder 2. The lower end of the supporting cylinder 2 and the spring 14 are both arranged in the shifting block 13, so that the whole structure is compact, the occupied space is reduced, the spring 14 is hidden, the protection effect is achieved, the spring 14 is effectively prevented from being interfered by the external environment, and the stability of the whole structure of the sand bag is enhanced. Further, a convex column 2a matched with the spring 14 is formed on the inner side wall of the lower end of the support cylinder 2, and one end of the spring 14 is sleeved on the convex column 2a to enhance the operation stability of the spring 14.

The shaft portion 13a and the support cylinder 2 are hinged as follows: the shaping has the baffle 2b of vertical setting on the 2 lower extreme inner walls of support cylinder, and shifting block 13 length both sides all are equipped with foretell baffle 2b, all are equipped with the jack that matches with axial region 13a on every baffle 2b, and axial region 13a pegs graft in corresponding the jack. By adopting the design, the device has the advantages of simple structure and convenience in installation.

Further, the upper end of the supporting cylinder 2 is screwed with a press ring 15; the outer side of the lower end of the supporting cylinder 2 is provided with a baffle ring 2c which is coaxial with the supporting cylinder 2, the upper end of the baffle ring 2c is provided with an annular flange 2d which is used for supporting the flexible striking body 6, and the annular flange 2d and the press ring 15 are matched to strengthen the positioning of the flexible striking body 6. The shifting block 13 is positioned at the inner side of the baffle ring 2c, a notch for the first side wall 13c to extend out is arranged on the side wall of the baffle ring 2c, and a holding part is formed on the first side wall 13 c. The shifting block 13 is positioned on the inner side of the retaining ring 2c, and a notch is arranged on the retaining ring 2c to operate the shifting block 13, so that the shifting block 13 can be hidden to avoid misoperation.

In the actual product, the material is mixed,

the baffle ring 2c is conical and the diameter is gradually reduced downwards, the inclined angle of the baffle ring 2c is the same as that of the first side wall 13c, and the first side wall 13c is positioned in the gap under the action of the spring 14. On the premise of not influencing the swing of the shifting block 13, the shifting block 13 can be better protected to prevent misoperation.

The holding portion is a holding opening 13d penetrating the first side wall 13c, and the axial direction of the holding opening 13d is perpendicular to the inclined direction of the first side wall 13 c.

As shown in fig. 1, a guide rod 16 is vertically fixed in the support cylinder 2, the lower end of the guide rod 16 passes through the upper port of the installation cylinder 12, the upper port of the installation cylinder 12 is square, the guide rod 16 is square rod-shaped and matched with the upper port of the installation cylinder 12, and the side wall of the guide rod 16 is attached to the inner wall of the upper port of the installation cylinder 12. The guide rod 16 is matched with the upper port of the mounting cylinder 12, so that the mounting position of the flexible striking body 6 is determined, the assembly is convenient, the height of the flexible striking body 6 is adjusted and guided, the striking body can only move up and down, and the stable work is ensured.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, and different points are as follows: the gripping portion is a projection formed on the outer wall of the first side wall 13 c.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A boxing sandbag comprises a water storage barrel (1) and a support cylinder (2) vertically arranged on the water storage barrel (1), wherein the water storage barrel (1) comprises a barrel body (1a) and a barrel cover (1b), a water inlet is formed in the barrel cover (1b), a flexible striking body (6) is installed outside the support cylinder (2), a connecting cylinder (3) is vertically arranged between the support cylinder (2) and the barrel cover (1b), the support cylinder (2) is connected with the upper end of the connecting cylinder (3) through a connecting structure, the lower end of the connecting cylinder (3) is fixedly connected with the barrel cover (1b), a rubber block (4) is clamped between the lower end of the connecting cylinder and the barrel cover (1b), the boxing sandbag is characterized in that an L-shaped air guide pipe (7) made of heat conduction materials is fixedly arranged in the barrel body (1a), the air guide pipe (7) is composed of a first pipe section (7a) horizontally arranged and a second pipe section (7b) vertically arranged, an air inlet hole penetrates through the barrel body (1a) horizontally, the first pipe section (7a) is inserted into the air inlet, and a seal is formed between the outer wall of the first pipe section (7a) and the inner wall of the air inlet; the rubber block (4) is annular, the pipe section II (7b) extends upwards into the connecting cylinder (3), the rubber block (4) is sleeved on the pipe section II (7b), and the inner wall of the rubber block (4) is attached to the outer wall of the pipe section II (7b) to form sealing; an inlet and a heat radiation fan (8) communicated with the inlet are fixed on the second pipe section (7b), the heat radiation fan (8) is positioned in the connecting cylinder (3), the upper end of the connecting cylinder (3) is closed, and exhaust holes (3a) penetrating through the connecting cylinder (3) are densely distributed on the side wall of the connecting cylinder (3).

2. A boxing sandbag according to claim 1, wherein the lower end of the connecting cylinder (3) is provided with an annular pressing edge (3b), the upper side surface and the lower side surface of the rubber block (4) are respectively pressed on the annular pressing edge (3b) and the barrel cover (1b), an annular connecting seat (7c) is integrally formed on the outer wall of the second pipe section (7b), the upper side surface of the annular pressing edge (3b) is pressed on the connecting seat (7c), the annular pressing edge (3b), the rubber block (4) and the barrel cover (1b) are fixedly connected through a bolt (9) and a nut (10) in a matching mode, the axis of the bolt (9) is parallel to the second pipe section (7b), at least two bolts (9) are circumferentially and uniformly distributed along the second pipe section (7b), and the nuts (10) and the bolts (9) are identical in number and correspond to one another in position.

3. A boxing sandbag in accordance with claim 1, wherein the support sleeve (2) is slidable up and down and locked in a sliding position by the connecting structure.

4. A boxing sandbag according to claim 3, wherein the connecting structure comprises a vertically arranged mounting cylinder (12), the supporting cylinder (2) is sleeved on the mounting cylinder (12), and the lower end of the mounting cylinder (12) is fixedly connected with the connecting cylinder (3); rack parts (12a) which are vertically arranged are formed on two sides of the mounting cylinder (12), and two shifting blocks (13) which are respectively opposite to the two rack parts (12a) are arranged below the supporting cylinder (2); a shaft part (13a) horizontally arranged and a tooth part (13b) matched with the rack part (12a) are formed on the shifting block (13), the tooth part (13b) is positioned between the shifting block (13) and the rack part (12a), and the shifting block (13) is hinged with the support barrel (2) through the shaft part (13a) so that the tooth part (13b) is close to or far away from the rack part (12 a); springs (14) which enable the tooth parts (13b) and the corresponding rack parts (12a) to have the meshing tendency are arranged between the two shifting blocks (13) and the supporting cylinder (2).

5. A boxing sandbag according to claim 4, wherein the driver block (13) has a bar shape and a length extending in a width direction of the rack portion (12a), the driver block (13) has a substantially U-shaped cross section, a first side wall (13c) and a second side wall having a tooth portion (13b) are provided on both sides of the width of the driver block (13), and the shaft portion (13a) is formed on both sides of the length of the driver block (13).

6. A boxing sandbag as claimed in claim 5, wherein said first side wall (13c) is inclined so that the distance between the two sides of the width of the pick (13) decreases downwards.

7. A boxing sandbag according to claim 5, wherein the lower end of the support tube (2) extends into the shifting block (13), the two springs (14) are horizontally arranged in the two shifting blocks (13), and the two ends of the spring (14) are respectively pressed on the inner wall of the shifting block (13) and the inner wall of the support tube (2).

8. A boxing sandbag according to claim 7, wherein the inner wall of the lower end of the supporting cylinder (2) is formed with vertically arranged baffles (2b), the baffles (2b) are arranged on both sides of the length of the shifting block (13), each baffle (2b) is provided with a jack matched with the shaft part (13a), and the shaft parts (13a) are inserted into the corresponding jacks.

9. A boxing sandbag according to claim 4, wherein a guide rod (16) is vertically fixed in the supporting cylinder (2), the lower end of the guide rod (16) penetrates through the upper port of the mounting cylinder (12), the upper port of the mounting cylinder (12) is square, the guide rod (16) is square and matched with the upper port of the mounting cylinder (12), and the side wall of the guide rod (16) is attached to the inner wall of the upper port of the mounting cylinder (12).

10. A boxing sandbag according to claim 4, wherein a baffle ring (2c) coaxial with the support cylinder (2) is formed on the outer side of the lower end of the support cylinder (2), an annular flange (2d) for supporting the flexible striking body (6) is formed on the upper end of the baffle ring (2c), the shifting block (13) is positioned on the inner side of the baffle ring (2c), a notch for the first side wall (13c) to extend out is formed on the side wall of the baffle ring (2c), and a holding part is formed on the first side wall (13 c).