Adjustable sandbag for sports

Abstract

The application discloses a sandbag with adjustable weight for sports, and relates to the technical field of sandbags.The sandbag comprises a sandbag assembly, a sandbag body, a suspension plate fixed to the top of the sandbag body, and a bottom sealing seat fixed to the bottom of the sandbag body; and a weight adjusting assembly arranged in the sandbag body, wherein the weight adjusting assembly comprises an overflow part arranged in the sandbag body, a bearing ring fixed to the sandbag body, a hollow groove formed in the top of the inner ring of the bearing ring, an overflow pipe embedded in the bearing ring, and a pumping part arranged in the sandbag body.The sandbag has the beneficial effect that the liquid volume injected into the sandbag body can be flexibly adjusted by the transmission part, the overall weight of the sandbag body can be changed, and the overflow part is used for overflow distribution, so that the oil liquid distribution uniformity is ensured, and the actual use requirement is met.

Description

Technical Field

[0001] This invention relates to the field of sandbag technology, and in particular to an adjustable sandbag for sports. Background Technology

[0002] Sandbags are bag-shaped objects made of sturdy materials such as canvas, leather, or nylon, filled with heavy materials such as sand, gravel, sawdust, sponge, or special granules. They are mostly cylindrical or oval in shape. In sports, such as combat athletes, sandbags are used in conjunction with strength and skill training.

[0003] Existing sandbags are generally fixed, one-piece designs with a constant weight. Adjustable sandbags, on the other hand, are typically made by adding granular fillers, counterweights, or fluid counterweights. Granular filler sandbags are cumbersome to operate, requiring repeated opening of the filling port when changing weight. Counterweight sandbags have structural instability issues and can cause bulges on the surface, affecting training feel. Fluid counterweight sandbags suffer from uneven liquid distribution within the bag, also impacting training feel. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned adjustable sandbags for sports, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is that the sandbags in the prior art are generally made by adding granular fillers, adding counterweights, and adding fluid counterweights. For the granular filler type, the operation is cumbersome, and the sandbag filling port needs to be opened repeatedly when the weight is changed; for the counterweight type, its structural stability is a concern, and the addition causes the surface of the sandbag to bulge, affecting the training feel; for the fluid counterweight, the liquid phase is unevenly distributed in the sandbag, affecting the training feel.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an adjustable sandbag for sports, comprising, A sandbag assembly includes a sandbag body, a suspension plate fixed to the top of the sandbag body, and a bottom sealing seat fixed to the bottom of the sandbag body; and... The weight adjustment component, located within the sandbag body, includes an overflow component installed within the sandbag body, a bearing ring fixed within the sandbag body with a slot at the top of the inner ring, an overflow pipe embedded in the bearing ring, a suction component within the sandbag body including an airbag fixed within the sandbag body, a transmission pipe fixed on the airbag, a liquid suction pipe fixed within the inner ring of the airbag, a return pipe fixed at the top of the airbag, and a transmission component within the suspension plate including an oil injection pipe fixed to the suspension plate, and an oil discharge pipe embedded at the top of the suspension plate.

[0007] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the sandbag body has a first mounting cavity, and the inner wall of the first mounting cavity has a second mounting cavity.

[0008] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the number of the bearing rings is several and they are evenly distributed in the first mounting cavity, and the outer ring of the bearing ring is fixed in the first mounting cavity.

[0009] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the number of airbags is several and they are evenly distributed in the second mounting cavity. The outer ring of each airbag is fixed in the second mounting cavity, and the multiple airbags are staggered with the supporting ring.

[0010] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the top of the overflow pipe protrudes into the bearing ring, the horizontal plane at the top of the overflow pipe is lower than the horizontal plane at the bottom of the cavity, and the bottom of the overflow pipe is connected to the cavity of the next-level bearing ring.

[0011] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the top of the bearing ring is provided with an installation hole and is sealed to the overflow pipe, and the inner wall of the hollow groove is provided with an inclined groove.

[0012] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the liquid-drawing tube is fixed to the lowest air bladder, and a first one-way valve is installed on the liquid-drawing tube, wherein the flow direction of the first one-way valve is from the liquid-drawing tube to the air bladder.

[0013] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the return pipe is fixed to the uppermost airbag, a second one-way valve is installed on the return pipe, the flow direction of the second one-way valve is from the airbag to the return pipe, and the end of the return pipe away from the airbag extends through to the inner cavity of the uppermost bearing ring.

[0014] As a preferred embodiment of the adjustable sandbag for sports described in this invention, a branch pipe is fixed at the bottom of the inner cavity of the oil injection pipe, the other end of the branch pipe is fixed in the uppermost bearing ring, a vertical pipe is fixed at the bottom of the oil discharge pipe, and the bottom of the vertical pipe extends to the bottom of the inner cavity of the first mounting cavity.

[0015] As a preferred embodiment of the adjustable sandbag for sports described in this invention, the top of the suspension plate is provided with suspension rings, and the number of suspension rings is four, arranged in a circular array on the top of the suspension plate.

[0016] The beneficial effects of this invention are as follows: by setting the weight adjustment component, the amount of liquid injected into the sandbag body can be flexibly adjusted by the transmission component, thereby changing the overall weight of the sandbag body. At the same time, it can be distributed in an overflow manner with the help of the overflow component. As the sandbag body is continuously hit and shaken, the suction component can be used to back-suction and redistribute the liquid, ensuring the uniformity of the oil distribution, which is more in line with the actual use requirements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A structural diagram of an adjustable sandbag for sports.

[0019] Figure 2 A half-section front view of an adjustable sandbag for sports.

[0020] Figure 3 A sectional perspective view of an adjustable sandbag for sports.

[0021] Figure 4 A diagram showing the overflow component of an adjustable sandbag for sports.

[0022] Figure 5 A diagram showing the separation of the suction components of an adjustable sandbag for sports.

[0023] Figure 6 A structural diagram of the transmission mechanism for adjustable sandbags used in sports.

[0024] Figure 7 Top sectional view of an adjustable sandbag for sports.

[0025] In the diagram: 1. Sandbag assembly; 11. Sandbag body; 11-1. First mounting cavity; 11-2. Second mounting cavity; 12. Suspension plate; 12-1. Suspension ring; 13. Bottom seal; 2. Weight adjustment assembly; 21. Overflow component; 21-1. Bearing ring; 21-2. Empty groove; 21-3. Overflow pipe; 21-4. Inclined groove; 21-5. Mounting hole; 22. Suction component; 22-1. Airbag; 22-2. Transmission pipe; 22-3. Liquid suction pipe; 22-31. First check valve; 22-4. Return pipe; 22-41. Second check valve; 23. Transmission component; 23-1. Oil injection pipe; 23-2. Branch pipe; 23-3. Oil discharge pipe; 23-4. Vertical pipe. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments. Example

[0029] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides an adjustable sandbag for sports. The adjustable sandbag for sports includes a sandbag assembly 1 and a weight adjustment assembly 2. By setting the weight adjustment assembly 2, the amount of liquid injected into the sandbag body 11 can be flexibly adjusted, the overall weight of the sandbag body 11 can be changed, and an overflow distribution can be carried out. As the sandbag body 11 is continuously hit and shaken, it assists in back-suction and redistribution to ensure the uniformity of oil distribution.

[0030] Specifically, the sandbag assembly 1 includes a sandbag body 11, a suspension plate 12 fixed to the top of the sandbag body 11, and a bottom sealing seat 13 fixed to the bottom of the sandbag body 11.

[0031] The suspension plate 12, which is a metal plate made of stainless steel, is directly connected to the steel chain to concentrate the tension during hoisting onto the plate, preventing the tension from acting directly on the fabric and causing tearing. The bottom sealing seat 13, which is made of thickened fabric, is used to seal the bottom of the sandbag body 11 to prevent the filling material from leaking out. The working principle of this part is all existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0032] Specifically, the weight adjustment component 2 is installed inside the sandbag body 11, including an overflow component 21 installed inside the sandbag body 11, including a bearing ring 21-1 fixed inside the sandbag body 11, a slot 21-2 is opened at the top of the inner ring of the bearing ring 21-1, and an overflow pipe 21-3 is embedded on the bearing ring 21-1. The sandbag body 11 is provided with a suction component 22, including an airbag 22-1 fixed inside the sandbag body 11, a transmission pipe 22-2 is fixed on the airbag 22-1, a liquid suction pipe 22-3 is fixed in the inner ring of the airbag 22-1, and a return pipe 22-4 is fixed at the top of the airbag 22-1. The suspension plate 12 is provided with a transmission component 23, including an oil injection pipe 23-1 fixed on the suspension plate 12, and an oil discharge pipe 23-3 is embedded at the top of the suspension plate 12.

[0033] The overflow component 21 is designed to overflow and distribute the falling oil, ensuring that the oil is well distributed within the multiple bearing rings 21-1.

[0034] By setting the suction device 22, athletes can continuously strike the sandbag body 11 with their hands or legs during training. This causes the airbag 22-1 to undergo elastic deformation, which transports the oil from the bottom of the sandbag body 11 upwards, completing the redistribution of the oil and helping to improve the uniformity of the liquid phase distribution within the sandbag body 11.

[0035] The transmission component 23 is configured to work with external oil pumps and oil extraction pumps to flexibly adjust the total amount of oil in the sandbag body 11. Example

[0036] Reference Figures 2-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0037] Specifically, a first mounting cavity 11-1 is provided inside the sandbag body 11, and a second mounting cavity 11-2 is provided on the inner wall of the first mounting cavity 11-1.

[0038] There are several bearing rings 21-1, which are evenly distributed in the first mounting cavity 11-1, and the outer ring of the bearing ring 21-1 is fixed in the first mounting cavity 11-1.

[0039] There are several airbags 22-1, which are evenly distributed in the second mounting cavity 11-2. The outer ring of the airbag 22-1 is fixed in the second mounting cavity 11-2, and the multiple airbags 22-1 are staggered with the bearing ring 21-1.

[0040] The sandbag body 11 adopts a double-layer inner liner oil-resistant design. The inner layer is a smooth oil-resistant film, and the outer layer is a reinforced fiber layer. This not only ensures the overall stability of the sandbag body 11, but also has good oil resistance, preventing oil from seeping out at will.

[0041] The multiple airbags 22-1 and the supporting ring 21-1 are interlocked and can be well adapted to the training needs of athletes.

[0042] The bearing ring 21-1 is made of nitrile rubber, which has excellent oil resistance, good wear resistance and tear resistance, chemical corrosion resistance and solvent resistance, and good mechanical properties. When hit by an athlete, the vibration is transmitted and the bearing ring 21-1 undergoes elastic deformation, which adapts to dynamic deformation while maintaining structural strength, and plays a role in auxiliary buffer protection.

[0043] The top of the overflow pipe 21-3 protrudes into the bearing ring 21-1. The horizontal plane at the top of the overflow pipe 21-3 is lower than the horizontal plane at the bottom of the cavity of the empty groove 21-2. The bottom of the overflow pipe 21-3 is connected to the cavity of the next-level bearing ring 21-1.

[0044] The overflow pipe 21-3 allows a suitable amount of oil to be temporarily stored in the bearing ring 21-1. When more oil is added, it will overflow through the overflow pipe 21-3 and continue to fall, thus ensuring the uniform distribution of oil in the sandbag body 11.

[0045] The top of the bearing ring 21-1 is provided with an installation hole 21-5, which is sealed to the overflow pipe 21-3. The inner wall of the empty groove 21-2 is provided with an inclined groove 21-4.

[0046] The inclined groove 21-4 can play an auxiliary role in guiding the flow, and when the oil is discharged through the empty groove 21-2, it can prevent oil residue from adhering.

[0047] The liquid suction tube 22-3 is fixed to the lowest air bag 22-1. A first one-way valve 22-31 is installed on the liquid suction tube 22-3. The flow direction of the first one-way valve 22-31 is from the liquid suction tube 22-3 to the air bag 22-1.

[0048] By using the liquid suction pipe 22-3 and the first one-way valve 22-31, when the airbag 22-1 is compressed and then re-expands, a negative pressure is generated to draw the oil from the bottom of the first mounting cavity 11-1, and then safely guides it into the bearing ring 21-1 and the overflow pipe 21-3.

[0049] The return pipe 22-4 is fixed to the uppermost airbag 22-1. A second one-way valve 22-41 is installed on the return pipe 22-4. The flow direction of the second one-way valve 22-41 is from the airbag 22-1 to the return pipe 22-4. The end of the return pipe 22-4 away from the airbag 22-1 passes through the inner cavity of the uppermost bearing ring 21-1.

[0050] By means of the return pipe 22-4 and the second one-way valve 22-41, when the airbag 22-1 is compressed, the gas or liquid in the airbag 22-1 and the transmission pipe 22-2 can be guided into the uppermost bearing ring 21-1 through the return pipe 22-4.

[0051] A branch pipe 23-2 is fixed at the bottom of the inner cavity of the oil injection pipe 23-1. The other end of the branch pipe 23-2 is fixed inside the uppermost bearing ring 21-1. A vertical pipe 23-4 is fixed at the bottom of the oil discharge pipe 23-3. The bottom of the vertical pipe 23-4 extends to the bottom of the inner cavity of the first mounting cavity 11-1.

[0052] The oil injection pipe 23-1 and branch pipe 23-2 are connected to an external oil pump, allowing oil to be added flexibly. The oil is placed into the bearing ring 21-1 through the oil injection pipe 23-1 and branch pipe 23-2.

[0053] The oil drain pipe 23-3 and the vertical pipe 23-4 are connected to an external oil pump, which can then extract the oil from the bottom of the first mounting cavity 11-1, thus flexibly reducing the overall weight of the sandbag body 11.

[0054] The top of the suspension plate 12 is fitted with four suspension rings 12-1 arranged in a circular array on the top of the suspension plate 12.

[0055] With the suspension plate 12 and suspension ring 12-1, the sandbag body 11 can be stably suspended on the external structure in conjunction with the external steel chain. By adjusting the suspension height, the training needs of athletes of different heights can also be met.

[0056] The oil injection pipe 23-1, branch pipe 23-2, bearing ring 21-1 and overflow pipe 21-3 are connected in sequence from top to bottom; the return pipe 22-4, airbag 22-1, transmission pipe 22-2 and liquid suction pipe 22-3 are connected in sequence from top to bottom.

[0057] In use, firstly, according to the actual training needs of athletes, an appropriate amount of oil is injected through the oil injection pipe 23-1 in conjunction with the oil pump. Under the guidance of the branch pipe 23-2, it is placed into the bearing ring 21-1. With the cooperation of the overflow pipe 21-3, the excess oil will automatically overflow and fall into the next level overflow pipe 21-3. This cycle is repeated to achieve uniform distribution of oil. Alternatively, an oil pump can be connected to the oil drain pipe 23-3 to extract excess oil from the sandbag body 11 with the cooperation of the vertical pipe 23-4.

[0058] As the athletes train, each time the sandbag body 11 is struck, it compresses the airbag 22-1, causing it to deform elastically. The gas in the airbag 22-1 and the transmission pipe 22-2 is discharged unidirectionally through the return pipe 22-4, while the oil in the bearing ring 21-1 is discharged through the vibration section into the empty groove 21-2, with some falling into the lower bearing ring 21-1 and some falling into the first mounting cavity 11-1. After a training session is completed, the airbag 22-1 automatically resets, and the oil in the first mounting cavity 11-1 is placed into the airbag 22-1 and the transmission pipe 22-2 through the liquid suction pipe 22-3.

[0059] Each time the sandbag body 11 is struck, the bearing ring 21-1 vibrates, causing the oil to fall through the empty groove 21-2. At the same time, the airbag 22-1 is compressed and releases gas, which drives the oil to be transported upward through the return pipe 22-4, thus achieving mixing of the upper and lower layers of oil.

[0060] In this cycle, when athletes repeatedly strike the sandbag body 11 during training, the amount of oil temporarily stored in the airbag 22-1 and the transmission pipe 22-2 increases. Finally, it is transmitted unidirectionally to the uppermost bearing ring 21-1 through the return pipe 22-4, and can be redistributed in conjunction with the overflow pipe 21-3. Under the premise that the weight of the sandbag body 11 is adjustable, the overall uniformity of the sandbag body 11 is better. Example

[0061] Reference Figures 3-7 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0062] Specifically, the liquid phase injected into the sandbag body 11 is food-grade oil, which makes it safer even in the event of an accidental leak.

[0063] The middle section of overflow pipe 21-3 is protruding, as shown in the attached diagram in the instruction manual. Figure 4 As shown in the enlarged view, it is used to increase the contact area with the bearing ring 21-1 and ensure the installation stability of the overflow pipe 21-3.

[0064] Those skilled in the art should understand that the amount of oil poured into the sandbag body 11 is fixed, making it difficult for the oil to be temporarily stored in the lower part of the bearing ring 21-1 through overflow. However, as the athletes train, each time the sandbag body 11 is hit, it will cause the sandbag body 11 to vibrate, and the oil temporarily stored on top will shake and fall out of the empty groove 21-2, and then be partially placed into the lower empty bearing ring 21-1.

[0065] Similarly, when the amount of oil temporarily stored is greater, the amount of oil that leaves through the empty groove 21-2 with each impact will also be greater; when the amount of oil temporarily stored is less, the amount of oil that leaves through the empty groove 21-2 with each impact will also be less. Therefore, it can help improve the uniformity of oil distribution in multiple bearing rings 21-1, which is more in line with the needs of sports training.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An adjustable sandbag for sports, characterized in that: include, The sandbag assembly (1) includes a sandbag body (11), a suspension plate (12) fixed to the top of the sandbag body (11), and a bottom sealing seat (13) fixed to the bottom of the sandbag body (11); and, The weight adjustment component (2) is disposed inside the sandbag body (11), including an overflow component (21) installed inside the sandbag body (11), including a bearing ring (21-1) fixed inside the sandbag body (11), a slot (21-2) is provided at the top of the inner ring of the bearing ring (21-1), an overflow pipe (21-3) is embedded on the bearing ring (21-1), and a suction component (22) is disposed inside the sandbag body (11), including a component fixed inside the sandbag body (11). The airbag (22-1) inside the airbag (22-1) has a transmission pipe (22-2) fixed on it, a liquid suction pipe (22-3) fixed on the inner ring of the airbag (22-1), a return pipe (22-4) fixed on the top of the airbag (22-1), and a transmission component (23) is provided inside the suspension plate (12), including an oil injection pipe (23-1) fixed on the suspension plate (12), and an oil discharge pipe (23-3) is embedded on the top of the suspension plate (12).

2. The adjustable sandbag for sports as described in claim 1, characterized in that: The sandbag body (11) has a first installation cavity (11-1) inside, and a second installation cavity (11-2) is provided on the inner wall of the first installation cavity (11-1).

3. The adjustable sandbag for sports as described in claim 2, characterized in that: The number of the bearing rings (21-1) is several, and they are evenly distributed in the first mounting cavity (11-1). The outer ring of the bearing ring (21-1) is fixed in the first mounting cavity (11-1).

4. The adjustable sandbag for sports as described in claim 3, characterized in that: The number of airbags (22-1) is several and they are evenly distributed in the second mounting cavity (11-2). The outer ring of the airbag (22-1) is fixed in the second mounting cavity (11-2), and the multiple airbags (22-1) are staggered with the bearing ring (21-1).

5. The adjustable sandbag for sports as described in claim 4, characterized in that: The top of the overflow pipe (21-3) protrudes into the bearing ring (21-1). The horizontal plane at the top of the overflow pipe (21-3) is lower than the horizontal plane at the bottom of the cavity of the empty groove (21-2). The bottom of the overflow pipe (21-3) is connected to the cavity of the next bearing ring (21-1).

6. The adjustable sandbag for sports as described in claim 5, characterized in that: The top of the bearing ring (21-1) is provided with an installation hole (21-5) and is sealed to the overflow pipe (21-3). The inner wall of the empty groove (21-2) is provided with an inclined groove (21-4).

7. The adjustable sandbag for sports as described in claim 6, characterized in that: The liquid-drawing tube (22-3) is fixed on the lowest airbag (22-1). A first one-way valve (22-31) is installed on the liquid-drawing tube (22-3). The flow direction of the first one-way valve (22-31) is from the liquid-drawing tube (22-3) to the airbag (22-1).

8. The adjustable sandbag for sports as described in claim 7, characterized in that: The return pipe (22-4) is fixed on the uppermost airbag (22-1). A second one-way valve (22-41) is installed on the return pipe (22-4). The flow direction of the second one-way valve (22-41) is from the airbag (22-1) to the return pipe (22-4). The end of the return pipe (22-4) away from the airbag (22-1) extends into the inner cavity of the uppermost bearing ring (21-1).

9. The adjustable sandbag for sports as described in claim 8, characterized in that: The bottom of the inner cavity of the oil injection pipe (23-1) is fixed with a branch pipe (23-2), and the other end of the branch pipe (23-2) is fixed in the uppermost bearing ring (21-1). The bottom end of the oil discharge pipe (23-3) is fixed with a vertical pipe (23-4), and the bottom of the vertical pipe (23-4) extends to the bottom of the inner cavity of the first mounting cavity (11-1).

10. The adjustable sandbag for sports as described in claim 9, characterized in that: The top of the suspension plate (12) is provided with a suspension ring (12-1), and there are four suspension rings (12-1) arranged in a circular array on the top of the suspension plate (12).

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