CN117101080B - Kettle bell with adjustable counterweight - Google Patents

Abstract

The invention discloses a kettlebell with adjustable weight, including a shell, a handle, a plurality of weight plates, and a base. The shell includes an inner and outer shell, a weight support frame, the weight support frame is fixed to the inner and outer shells, and a hanger corresponding to the weight plate is provided on the weight support frame; the weight plates are positioned and stacked in sequence, and arc-shaped hangers corresponding to the hangers are provided on the weight plates, and the arc-shaped hangers are arranged from long to short from top to bottom and form a weight adjustment gear; a center positioning seat is provided on the base, and a turntable is provided between the base and the center positioning seat, the weight plate is positioned and placed on the center positioning seat, and the shell is positioned and placed on the turntable and covers the weight plate; when the handle drives the shell to rotate, the hanger slides under the corresponding arc-shaped hanger to realize weight adjustment. After adopting the above structure, it has the advantages of reasonable structural design, simple and convenient rotation adjustment, safe use, small matching gap, good stability, etc.

Description

Adjustable weight kettlebell

Technical Field

The invention relates to the technical field of sports and fitness equipment, in particular to a weight-adjustable kettlebell whose weight can be adjusted by rotating a handle.

Background technique

Kettlebells are commonly used fitness equipment in strength combination training. During training, people usually hold the handles with both hands and swing them, which can train more muscle groups and promote the healthy and coordinated development of various parts of the body. Traditional kettlebells are one-piece and the weight cannot be changed. In order to adapt to different training intensities and training requirements, a set of kettlebells of different weights needs to be configured. It is more suitable for fitness venues to buy a whole set for use, and families rarely buy a whole set for use.

In order to overcome the problem that the weight of the transmission kettlebell is fixed and cannot be adjusted and the whole set is purchased, Chinese patent announcement number CN217246498U discloses a kettlebell with adjustable weight. This structure can obtain kettlebells of different weights by simply adjusting the number of internal counterweights by inserting the pins into different positions. One kettlebell can replace a set of traditional kettlebells. It is more economical and convenient to use in fitness venues and families, and occupies less space, which solves the above problems of traditional kettlebells. However, this structure still has the following shortcomings during use: First, each counterweight block needs to be installed with a limit assembly to be used in conjunction with the pin, the counterweight block structure is too complicated, production and installation are inconvenient, and there is also a defect of failure of the limit assembly; second, because the counterweight block is not provided with a base, the counterweight block is prone to confusion during the use of the counterweight adjustment, and the counterweight block cannot be neatly placed; third, the gap between the counterweight blocks is large, and mechanical collision sounds will be generated during training; further improvement is needed.

Summary of the invention

In order to overcome the above problems existing in the prior art, the purpose of the present invention is to provide a kettlebell with adjustable weight, which has reasonable structural design, simple and convenient rotation and adjustment of the weight, safe and reliable use, small matching clearance and good stability.

The present invention creates a technical solution adopted to solve the above-mentioned technical problems, which includes a shell, a handle fixed to the shell, a plurality of counterweight plates, and a base. The shell includes an inner and outer shell, a counterweight support frame, the counterweight support frame is fixedly connected to the inner and outer shells, and the counterweight support frame is provided with hangers corresponding to the counterweight plates; the counterweight plates are positioned and stacked in an arrangement order, and arc-shaped gears corresponding to the hangers are provided on the counterweight plates, and the arc-shaped gears on the counterweight plates are arranged from long to short from top to bottom and form counterweight adjustment gears; a center positioning seat is provided on the base, and a turntable is provided between the base and the center positioning seat, the counterweight plate is positioned and placed on the center positioning seat, and the shell is positioned and placed on the turntable and covers the counterweight plate; when the handle drives the shell to rotate, the hanger on the counterweight support frame slides under the arc-shaped gear of the corresponding counterweight plate to realize counterweight adjustment.

A further solution created by the present invention is that a rotation locking device of a counterweight plate is provided in the shell, and the rotation locking device comprises a guide rod slidably arranged on the shell, a counterweight plate locking block fixedly connected to the top of the guide rod, and a locking block spring that applies elastic force to the counterweight plate locking block, and an anti-rotation positioning groove cooperating with the counterweight plate locking block is provided on the topmost counterweight plate, and the number of the anti-rotation positioning grooves is consistent with the counterweight adjustment gear; when the shell is placed on the turntable, the guide rod is pressed against the turntable, and the counterweight plate locking block is separated and unlocked from the corresponding anti-rotation positioning groove under the action of the guide rod, and the shell can be rotated relative to the counterweight plate to adjust the counterweight; when the handle is lifted, the guide rod is disengaged from the turntable, and the counterweight plate locking block is combined and locked with the corresponding anti-rotation positioning groove under the action of the locking block spring, and the counterweight plate cannot rotate relative to the shell.

A further solution created by the present invention is that a bottom cover is fixed on the turntable, and a turntable gear locking device is provided between the turntable and the bottom cover, and the turntable gear locking device includes a gear locking piece, a locking piece spring, a locking pin, and a locking pin spring. A gear notch matching the counterweight adjustment gear is provided on the central positioning seat, a locking slot and a lock head that cooperates with the gear notch to lock is provided on the gear locking piece, a straight pin portion that can move relative to the locking slot is provided on the upper part of the lock pin, and a locking portion that matches the locking slot and cannot be moved is provided on the lower part, the gear locking piece is horizontally arranged on the turntable through the locking piece spring, and the locking pin is arranged in the locking slot and passes through the lock. The pin spring is longitudinally arranged between the turntable and the bottom cover, and the straight pin portion of the lock pin extends out from the straight pin hole of the turntable and cooperates with the shell; when the shell is pressed on the straight pin portion, the lock pin moves downward, and the gear lock plate can move outward relative to the straight pin portion to release the lock of the turntable. At this time, when the handle is turned, the gear lock plate overcomes the elastic force of the lock plate spring and moves from the previous gear slot to the next gear slot, and the shell and the turntable rotate synchronously to realize the counterweight adjustment; when the shell is separated from the straight pin portion, the lock pin bounces upward under the elastic force of the lock pin spring, and the locking portion cooperates with the locking groove to make the gear lock plate immovable, and the lock head cooperates with the gear slot to lock the turntable.

A further solution created by the present invention is that a center positioning piece is fixed on the counterweight support frame, a center positioning groove is provided on the upper part of the counterweight plate, a counterweight plate positioning block is provided on the bottom, and a counterweight plate positioning groove is provided on the center positioning seat. The center positioning piece on the counterweight support frame is rotatably matched with the center positioning groove of the uppermost counterweight plate, the counterweight plate positioning block of the lowermost counterweight plate is positioned and matched with the counterweight plate positioning groove on the center positioning seat, and the counterweight plates are positioned by the counterweight plate positioning block and the center positioning groove.

According to a further solution of the present invention, a housing positioning seat is provided on the turntable, and a positioning guide member which cooperates with the housing positioning seat for positioning is provided on the housing.

According to a further solution of the present invention, an initial position arrow is provided on the center positioning seat, and a counterweight plate positioning arrow and number are provided on the counterweight plate.

According to a further solution created by the present invention, a counterweight indicating window is provided on the base, the angle of which is consistent with the counterweight adjustment gear position, and an indicating arrow is provided on the turntable for cooperating with the counterweight indicating window to indicate the counterweight.

According to a further solution of the present invention, a counterweight dial and a transparent cover for covering the counterweight dial are installed on the counterweight indicating window.

After adopting the above structure, compared with the prior art, there are the following advantages and effects: First, when the kettlebell is in a static placement state, the weight of the kettlebell can be adjusted in the gear sequence by turning the handle, and the weight adjustment is simple and convenient. Second, when adjusting the weight of the kettlebell, the corresponding hanger on the weight support frame cooperates with the arc-shaped gear of the corresponding weight plate, and at least two groups of hangers cooperate with the corresponding arc-shaped gear to hold the weight plate, the matching gap is small, the weight plate is compactly matched, the connection is stable and reliable, and the shaking is small. Third, after the weight adjustment is completed, the weight plate is automatically locked on the shell through the rotating locking device, so that the weight plate cannot rotate relative to the shell, ensuring that the weight plate does not fall off during training, thereby ensuring the safety of the kettlebell. Fourth, the turntable gear locking device can be freely rotated during the weight adjustment, and the turntable is automatically locked in the center positioning seat when the handle is lifted, ensuring that the gear indication is consistent with the weight adjustment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the decomposition structure of the invention.

FIG. 2 is a schematic diagram of the bottom view of the handle assembly of the present invention.

FIG. 3 is a schematic diagram of the three-dimensional structure of the handle assembly of the present invention.

FIG. 4 is a schematic diagram of the exploded structure of the handle assembly of the present invention.

FIG. 5 is a schematic diagram of the exploded structure of the base assembly of the present invention.

FIG. 6 is a schematic diagram of the main structure of the invention.

Fig. 7 is a schematic diagram of the A-A cross-sectional structure of the present invention.

Fig. 8 is a schematic diagram of the B-B cross-section matching structure of the present invention when no sheet is hung.

Fig. 9 is a schematic diagram of the B-B cross-section matching structure when all hanging pieces are created in the present invention.

Wherein: 1 handle, 2 outer shell, 3 counterweight plate, 4 counterweight plate positioning arrow and number, 5 center positioning seat, 6 turntable, 7 base, 8 shell positioning seat, 9 center positioning slot, 10 anti-rotation positioning slot, 11 arc gear, 12 counterweight plate positioning slot, 13 initial position arrow, 14 turntable gear locking device, 15 indication arrow, 16 counterweight indication window, 17 inner shell, 18 center positioning part, 19 rotation locking device, 20 counterweight support frame, 21 hanging part, 22 guide rod, 23 positioning guide part, 24 locking block spring, 25 counterweight plate locking block, 26 gear locking plate, 27 locking plate spring, 28 locking pin, 29 locking pin spring, 30 bottom cover, 31 ball rotating frame, 32 counterweight dial, 33 transparent cover, 34 locking slot, 35 direct selling part, 36 base positioning slot, 37 locking head, 38 locking part, 39 gear slot.

Implementation

As shown in Figures 1 to 9, a specific implementation scheme of the kettlebell with adjustable weight created by the present invention comprises a shell, a handle 1 fixed to the shell, a plurality of weight plates 3, and a base 7. The shell comprises an inner shell 17, an outer shell 2, and a weight support frame 20. The weight support frame 20 is fixedly connected to the inner and outer shells 17 and 2 as a whole. The weight support frame 20 is an inverted U-shaped structure. Hanging pieces 21 corresponding to the number of weight plates 3 are symmetrically arranged on the hanging arms on both sides of the weight support frame 20; the weight plates 3 are positioned and stacked in an arrangement order and cannot rotate relative to each other. The weight plates 3 are provided with arc-shaped hanging pieces 11 corresponding to the hanging pieces 21. The arc-shaped hanging pieces on the weight plates 3 are arranged in a fixed manner. The gears 11 are arranged from long to short from top to bottom and form a counterweight adjustment gear, one piece per gear, a total of six counterweight plates 3 and a neutral gear, each of which is 3kg, and a total of 7 counterweight adjustment gears; the base 7 is provided with a base positioning groove 36, and the center positioning seat 5 is installed on the base 7 through the base positioning groove 36 to ensure that the installation position of the center positioning seat 5 is unique; a turntable 6 is provided between the base 7 and the center positioning seat 5, and the center positioning seat 5 is located at the center position of the turntable 6. The turntable 6 is rotatably arranged on the base 7 through a ball rotating frame 31, and the counterweight plate 3 is positioned and placed on the center positioning seat 5, and the shell is positioned and placed on the turntable 6 and covers the counterweight plate 3. When the handle 1 drives the shell to rotate, the hanger 21 on the counterweight support frame 20 slides into the arc-shaped hanger 11 below the corresponding counterweight plate 3 to achieve counterweight adjustment.

In order to ensure stable and reliable weight adjustment and prevent the weight plate 3 from rotating, a rotation locking device 19 of the weight plate is provided in the shell, and the rotation locking device 19 includes a guide rod 22 slidably arranged on the shell, a weight plate locking block 25 fixedly connected to the top of the guide rod 22, and a locking block spring 24 that applies elastic force to the weight plate locking block 25. The topmost weight plate 3 is provided with an anti-rotation positioning groove 10 that cooperates with the weight plate locking block 25, and the number of the anti-rotation positioning grooves 10 is consistent with the weight adjustment gear. , there are a total of 7 anti-rotation positioning grooves 10; when the shell is placed on the turntable 6, the guide rod 22 is pressed against the turntable 6, and the counterweight plate locking block 25 moves upward under the action of the guide rod 22, and the counterweight plate locking block 25 is separated and unlocked from the corresponding anti-rotation positioning groove 10, and the shell can be rotated relative to the counterweight plate 3 to adjust the weight; when the handle 1 is lifted, the guide rod 22 is disengaged from the turntable 6, and the counterweight plate locking block 25 is combined and locked with the corresponding anti-rotation positioning groove 10 under the action of the locking block spring 24, and the counterweight plate 3 cannot rotate relative to the shell.

In order to achieve gear adjustment and prevent gear adjustment from being disordered, a bottom cover 30 is fixed on the turntable 6, and a turntable gear locking device 14 is provided between the turntable 6 and the bottom cover 30. The turntable gear locking device 14 includes a gear lock plate 26, a lock plate spring 27, a lock pin 28, and a lock pin spring 29. A gear slot 39 matching the counterweight adjustment gear is provided on the center positioning seat 5, and a locking slot 34 and a lock head 37 locked with the gear slot 39 are provided on the gear lock plate 26. A straight pin portion 35 movable relative to the locking slot 34 is provided on the upper part of the lock pin 28, and a non-movable locking portion 38 matching the locking slot 34 is provided on the lower part. The gear lock plate 26 is horizontally arranged on the turntable 6 through the lock plate spring 27, and the lock pin 28 is arranged in the locking slot 34 and is longitudinally arranged between the turntable 6 and the bottom cover 30 through the lock pin spring 29. When the handle 1 is lifted and the shell and the straight pin portion 35 are separated, the lock pin 28 bounces upward under the elastic force of the lock pin spring 29, the locking portion 38 cooperates with the locking groove 34 to make the gear lock plate 26 immovable, and the lock head 37 cooperates with the gear groove 39 to lock the turntable 6, thereby ensuring that the gear adjustment is not blocked.

In order to ensure that the counterweight plates 3 are stacked smoothly, a center positioning piece 18 is fixed on the counterweight support frame 20, a center positioning groove 9 is provided on the upper part of the counterweight plate 3, a counterweight plate positioning block is provided on the bottom, and a counterweight plate positioning groove 12 is provided on the center positioning seat 5. The center positioning piece 18 on the counterweight support frame 20 is rotatably matched with the center positioning groove 9 of the uppermost counterweight plate 3, and the counterweight plate positioning block of the lowermost counterweight plate 3 is positioned and matched with the counterweight plate positioning groove 12 on the center positioning seat 5. The counterweight plates 3 are positioned by the counterweight plate positioning block and the center positioning groove 9. The matching angles of the counterweight plate positioning block and the center positioning groove 9 of each counterweight plate 3 are different. They can only be stacked in the order of arrangement, and cannot be stacked if they are not in the order of arrangement.

In order to ensure that the housing and the turntable 6 are positioned, the turntable 6 is provided with a housing positioning seat 8, and the housing is provided with a positioning guide 23 that cooperates with the housing positioning seat 8 for positioning. The housing can only be inserted in one position to ensure that the housing and the turntable 6 are accurately positioned. The center positioning seat 5 is provided with an initial position arrow 13 and a positioning arrow, and the weight plate 3 is provided with a weight plate positioning arrow and a number 4 that cooperate with the positioning arrow on the center positioning seat 5, and the numbers on the weight plate 3 are arranged in order from top to bottom.

In order to read the counterweight intuitively, the base 7 is provided with a counterweight indication window 16 that is consistent with the counterweight adjustment gear angle, and the turntable 6 is provided with an indication arrow 15 that cooperates with the counterweight indication window 16 to indicate the counterweight. The counterweight indication window 16 is provided with a counterweight dial 32 and a transparent cover 33 for covering the counterweight dial 32.

The invention has the following working principle: in the initial state, the initial position arrow 13 on the center positioning seat 5 and the indicating arrow 15 indicating the counterweight on the rotating disk 6 are aligned with the counterweight indicating window 16, the counterweight plate 3 stacked together in the arrangement order is placed on the center positioning seat 5, the counterweight plate positioning arrow and the number 4 are aligned with the positioning arrow on the center positioning seat 5, the housing is placed on the rotating disk 6 through the positioning guide 23 and the housing positioning seat 8, as shown in Figures 1 and 8, the counterweight adjustment is in the neutral position, all the hanging parts 21 are not matched with the corresponding arc-shaped gear 11, the indicating arrow 15 indicating the counterweight is aligned with the counterweight indicating window 1 of the neutral counterweight of 2kg, that is, the weight of the handle 1 and the housing. At this time, the guide rod 22 is pressed on the rotating disk 6, and the guide rod 22 overcomes the elastic force of the lock block spring 24 to drive the counterweight plate lock block 2 to move upward, the counterweight plate lock block 25 is separated from the anti-rotation positioning groove 10 of the neutral position, and the rotation locking device 19 is in the unlocked state, and the housing can rotate relative to the counterweight plate 3 to adjust the counterweight. At the same time, the shell body presses on the straight pin portion 35 of the lock pin 28, and the lock pin 28 moves downward after overcoming the elastic force of the lock pin spring 29, and the locking portion 38 disengages from the locking groove 34, and the straight pin portion 35 cooperates with the locking groove 34. The locking portion 38 is misaligned with the locking groove 34, and the turntable gear locking device 14 is in an unlocked state. The lock head 37 of the gear lock plate 26 cooperates with the neutral gear slot 39. When the turntable 6 is rotated, the gear lock plate 26 can overcome the elastic force of the lock plate spring 27 and move outward relative to the straight pin portion 35 to realize gear adjustment.

The kettlebell weight adjustment is as follows: when the handle 1 is rotated at an angle of one gear, the handle 1 drives the hanger 21 on the weight support frame 20 to rotate through the shell, and the hanger 21 of the first gear slides into the arc-shaped gear 11 of the weight plate 3 of the first gear to realize the weight adjustment, and the hangers 21 of other gears are still in a separated state from the arc-shaped gear 11 of other gears. At this time, the indicator arrow 15 indicating the counterweight is aligned with the counterweight indicator window 1 of the first gear with a weight of 5kg, the counterweight plate locking block 25 corresponds to the anti-rotation positioning groove 10 of the first gear, and the lock head 37 of the gear locking plate 26 slides from the gear slot 39 of the neutral gear into the gear slot 39 of the first gear; continue to rotate the handle 1 according to the above steps to realize the weight adjustment from the second gear to the sixth gear, which will not be repeated here. Figure 9 shows that the weight adjustment is in the sixth gear position, all the hangers 21 are matched with the corresponding arc-shaped gear 11, and the indicator arrow 15 indicating the counterweight is aligned with the counterweight indicator window 1 of the sixth gear with a weight of 20kg.

When the handle 1 is lifted after the kettlebell weight adjustment is completed, the guide rod 22 is separated from the turntable 6, and the weight plate lock block 25 automatically combines with the corresponding anti-rotation positioning groove 10 under the elastic force of the lock block spring 24 to lock the weight plate 3, and the weight plate 3 cannot rotate relative to the shell, thereby ensuring that the weight plate 3 is reliably connected to the shell during the kettlebell training process. At the same time, the shell is separated from the base 7, and the lock pin 28 is bounced upward under the elastic force of the lock pin spring 29. The locking part 38 cooperates with the locking groove 34 to make the gear lock plate 26 immovable, and the lock head 37 of the gear lock plate 26 is locked on the gear slot 39 of the corresponding gear of the center positioning seat 5, thereby locking the turntable 6 to ensure that the gear indication is consistent with the weight adjustment.

The above is only a specific embodiment of the present invention and does not limit the present invention in any form. Simple modifications, equivalent changes or modifications made without departing from the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides a kettle bell with adjustable counter weight, includes casing, with handle (1) of casing fixed, a plurality of counter weight piece (3), base (7), characterized by: the shell comprises an inner shell (17) and an outer shell (2) and a counterweight supporting frame (20), wherein the counterweight supporting frame (20) is of an inverted U-shaped structure and is fixedly connected with the inner shell (17) and the outer shell (2), and hanging pieces (21) corresponding to the counterweight pieces (3) are symmetrically arranged on hanging arms at two sides of the counterweight supporting frame (20); the weight plates (3) are positioned and stacked according to the arrangement sequence, the outer side surface of the weight plate (3) is provided with arc-shaped gear (11) corresponding to the hanging piece (21), and the arc-shaped gear (11) on the weight plate (3) is sequentially arranged from top to bottom from long to short to form a weight adjusting gear; the base (7) is provided with a central positioning seat (5), a turntable (6) is arranged between the base (7) and the central positioning seat (5), the weight sheet (3) is positioned and placed on the central positioning seat (5), and the shell is positioned and placed on the turntable (6) and covers the weight sheet (3); when the handle (1) drives the shell to rotate, the hanging piece (21) on the counterweight supporting frame (20) slides into the lower part of the arc-shaped hanging gear (11) of the corresponding counterweight sheet (3) to realize counterweight adjustment.

2. The adjustable weight kettle bell as set forth in claim 1 wherein: the device is characterized in that a rotary locking device (19) of the weight plate is arranged in the shell, the rotary locking device (19) comprises a guide rod (22) arranged on the shell in a sliding manner, weight plate locking blocks (25) fixedly connected with the tops of the guide rod (22) and locking block springs (24) for applying elastic force to the weight plate locking blocks (25), anti-rotation positioning grooves (10) matched with the weight plate locking blocks (25) are formed in the weight plate (3) on the uppermost layer, and the number of the anti-rotation positioning grooves (10) is consistent with the weight adjusting gear; when the shell is placed on the turntable (6), the guide rod (22) is propped against the turntable (6), the weight plate locking piece (25) is separated from the corresponding anti-rotation positioning groove (10) and unlocked under the action of the guide rod (22), and the shell can rotate relative to the weight plate (3) to adjust the weight; when the handle (1) is lifted, the guide rod (22) is separated from the rotary table (6), the weight plate locking piece (25) is combined and locked with the corresponding anti-rotation positioning groove (10) under the action of the locking piece spring (24), and the weight plate (3) can not rotate relative to the shell.

3. The weight adjustable kettle bell according to claim 1 or 2, wherein: the rotary table is characterized in that a bottom cover (30) is fixed on the rotary table (6), a rotary table gear locking device (14) is arranged between the rotary table (6) and the bottom cover (30), the rotary table gear locking device (14) comprises a gear locking plate (26), a locking plate spring (27), a locking pin (28) and a locking pin spring (29), a gear notch (39) matched with a counterweight adjusting gear is arranged on a center positioning seat (5), a locking groove (34) and a locking head (37) matched and locked with the gear notch (39) are arranged on the gear locking plate (26), a straight pin part (35) capable of moving relative to the locking groove (34) is arranged at the upper part of the locking pin (28), a locking part (38) matched with the locking groove (34) is arranged at the lower part of the locking pin (28), the locking pin (26) is horizontally arranged on the rotary table (6) through the locking plate spring (27), the locking pin (28) is longitudinally arranged between the rotary table (6) and the bottom cover (30) through the locking plate spring (29), and the straight pin part (35) of the locking pin (28) stretches out of the straight pin hole of the rotary table (6) to be matched with the shell; when the shell is pressed on the straight pin part (35), the lock pin (28) moves downwards, the gear lock plate (26) can move outwards relative to the straight pin part (35) to unlock the rotary table (6), and when the handle (1) is rotated at the moment, the gear lock plate (26) moves from the front gear notch (39) to the next gear notch (39) against the elastic force of the lock plate spring (27), and the shell and the rotary table (6) synchronously rotate to realize balance weight adjustment; when the shell is separated from the straight pin part (35), the lock pin (28) is sprung upwards under the action of the elasticity of the lock pin spring (29), the locking part (38) is matched with the locking groove (34) to ensure that the gear locking plate (26) is not movable, and the lock head (37) is matched with the gear notch (39) to lock the rotary table (6).

4. The adjustable weight kettle bell according to claim 3 wherein: the balance weight supporting frame (20) on be fixed with central locating piece (18), balance weight piece (3) upper portion is equipped with central constant head tank (9), the bottom is equipped with the balance weight piece locating piece, be equipped with balance weight piece constant head tank (12) on central constant head tank (5), central locating piece (18) on balance weight supporting frame (20) and the central constant head tank (9) normal running fit of the balance weight piece (3) of the upper strata, the balance weight piece locating piece of the lower floor balance weight piece (3) and the balance weight piece constant head tank (12) location cooperation on central constant head tank (5), pass through the balance weight piece locating piece and be located with central constant head tank (9) cooperation between balance weight piece (3).

5. The adjustable weight kettle bell as set forth in claim 1 wherein: the rotary table (6) is provided with a shell positioning seat (8), and the shell is provided with a positioning guide piece (23) matched and positioned with the shell positioning seat (8).

6. The adjustable weight kettle bell as set forth in claim 5, wherein: the center positioning seat (5) is provided with an initial position arrow (13), and the weight plate (3) is provided with a weight plate positioning arrow and a number (4).

7. The adjustable weight kettle bell as set forth in claim 4 wherein: the base (7) is provided with a counterweight indicating window (16) with the same angle as the counterweight adjusting gear, and the turntable (6) is provided with an indicating arrow (15) which is matched with the counterweight indicating window (16) to indicate the counterweight.

8. The adjustable weight kettle bell as set forth in claim 7 wherein: the counterweight indicating window (16) is provided with a counterweight dial (32) and a transparent cover (33) for covering the counterweight dial (32).