CN219595741U - Training device capable of freely combining dumbbell, barbell and kettle bell - Google Patents

Abstract

The utility model discloses a training device capable of freely combining a dumbbell, a barbell and a kettle bell, which comprises a left weight assembly, a right weight assembly, a left weight base, a right weight base, a dumbbell rod, a barbell rod, a kettle bell handle and a button, wherein weight joints are correspondingly arranged at two ends of the dumbbell rod and one end of the kettle bell handle, button grooves are formed in the weight joints, lock pin holes and guide holes are formed in the button grooves, lock holes are formed in weight shafts of the weight assembly, lock pins and guide pins are arranged on the buttons, the buttons are axially movably arranged on the weight joints through the cooperation of the guide pins and the guide holes, the buttons are matched with the button grooves, and the lock pins are arranged on the lock pin holes and are matched with the lock holes; the functions of the dumbbell, the barbell and the kettle bell with adjustable weights can be realized rapidly through the changes of the left counterweight base, the right counterweight base and the connecting handle. After adopting this structure, have structural design reasonable, easy operation, function conversion convenience, counter weight regulating speed are fast, the advantage such as being convenient for collection.

Description

Training device capable of freely combining dumbbell, barbell and kettle bell

Technical Field

The utility model relates to the technical field of body-building equipment, in particular to a training device capable of freely combining a dumbbell, a barbell and a kettle bell.

Background

Dumbbell, barbell and kettle bell are the body-building equipment that is comparatively commonly used in the body-building training, and people often utilize dumbbell, barbell and kettle bell to carry out core strength training, promote healthy coordinated development of each position of health. Traditional dumbbells, barbells and kettles suffer from the following problems: firstly, dumbbell, barbell and kettle bell can not change each other, must purchase three kinds of body-building equipment, have the purchase with high costs, are unfavorable for accomodating scheduling problem. Secondly, the balance weights of the three fitness equipment are inconvenient to adjust, and the training requirements of each stage are not facilitated. For this reason, many manufacturers and knowledgeable individuals develop and develop them, but no ideal product has been developed so far.

Disclosure of Invention

In order to overcome the problems in the prior art, the utility model aims to provide the training device capable of freely combining the dumbbell, the barbell and the kettle bell, which has the advantages of reasonable structural design, simple operation, convenient function conversion, high counterweight adjusting speed and convenient collection.

The technical scheme includes that the balance weight base comprises a left balance weight assembly, a right balance weight base, a dumbbell rod, a barbell rod, a kettle bell handle and a button, wherein the balance weight base comprises a left balance weight base, a right balance weight base, two ends of the dumbbell rod and the barbell rod and one end of the kettle bell handle are correspondingly provided with balance weight joints, a button groove is formed in each balance weight joint, a lock pin hole and a guide hole are formed in each button groove, a lock hole is formed in a balance weight shaft of the balance weight assembly, a lock pin and a guide pin are arranged on each button, the buttons are axially movably arranged on the balance weight joints through the cooperation of the guide pins and the guide holes, and the lock pins are arranged on the lock pin holes and cooperate with the lock holes; when the training device is used as a dumbbell, the left counterweight base and the right counterweight base are of an integrated structure, and the counterweight joints at the two ends of the dumbbell rod are matched with the lock holes through lock pins and the left counterweight assembly and the right counterweight assembly to form the counterweight adjustable dumbbell; when the training device is used as a barbell, the left weight seat and the right weight seat are of separate structures, and the weight joints at the two ends of the barbell rod are matched with the lock holes through lock pins and form a weight-adjustable barbell with the left weight assembly and the right weight assembly; when the training device is used as a kettle bell, the left counterweight base and the right counterweight base are of a separation or hinge structure, and the counterweight joint of the kettle bell handle is matched with one counterweight assembly through a lock pin and a lock hole to form the counterweight adjustable kettle bell.

According to a further scheme of the utility model, the button is provided with the button magnetic block, and the counterweight joint is provided with the joint magnetic block with the magnetic attraction of the button magnetic block.

According to a further scheme of the utility model, the balance weight joint of the dumbbell rod and the kettle bell handle and the corresponding dumbbell rod and kettle bell handle are of an integrated structure.

According to a further scheme of the utility model, the barbell bar comprises a left barbell bar, a right barbell bar, balance weight joints and connecting rods, wherein the balance weight joints are correspondingly fixed at two ends of the left barbell bar and the right barbell bar, the connecting rods are detachably fixed between the balance weight joints of the left barbell bar and the right barbell bar, and the two ends of the left barbell bar and the right barbell bar are correspondingly provided with button holes matched with button grooves of the balance weight joints.

According to a further scheme, the counterweight assembly comprises four counterweight plates, a counterweight frame, end covers and counterweight shafts, wherein the end covers and the counterweight shafts are fixed on the counterweight frames, the counterweight frames are rotatably arranged on the counterweight shafts, first to fourth counterweight seats matched with the counterweight plates are fixed on the counterweight shafts between the end covers and the counterweight frames, isolating plates capable of rotating relative to the counterweight shafts are correspondingly arranged between adjacent counterweight seats, the isolating plates are positioned on the counterweight frames, arc notches and uniformly distributed locking grooves are correspondingly arranged on each counterweight seat according to counterweight sequencing, and elastic counterweight mechanisms matched with the locking grooves are arranged on the counterweight plates; the weight plate is locked when the elastic weight mechanism is combined with the locking groove.

According to a further scheme of the utility model, the elastic counterweight mechanism comprises a left pressing plate, a right pressing plate, a counterweight lock pin and a reset spring, wherein the counterweight lock pin is elastically reset through the left pressing plate, the right pressing plate and the reset spring and is arranged on a counterweight sheet, and the counterweight lock pin is provided with a ball head matched with the locking groove.

According to a further scheme of the utility model, the arc notch on the first counterweight seat is a counterweight starting point, and the arc notches on the second counterweight seat to the fourth counterweight seat are increased by 72 degrees one by one.

According to a further scheme of the utility model, a gear mark matched with the locking groove is arranged on the counterweight frame, a locking disc and a counterweight indicating disc are arranged on the counterweight shaft, a locking notch corresponding to the locking groove is arranged on the locking disc so as to use a gear positioning groove corresponding to the locking notch, and an elastic positioning bead matched with the gear positioning groove is arranged on the counterweight frame; when the indication position of the counterweight indication disc corresponds to the counterweight gear, the locking notch on the locking disc corresponds to the locking groove position of the gear mark.

According to a further scheme of the utility model, a locking mechanism for locking the counterweight frame to rotate relative to the locking disc is arranged on the counterweight frame, the locking mechanism comprises a spring and a locking block, and a guide groove matched with the locking disc is arranged on the locking block; when the locking block is jacked up, the guide groove on the locking block is overlapped with the outer ring of the locking disc, and the locking disc can rotate relative to the locking block; the lock block blocks the lock notch to prevent the lock plate from rotating when the lock block is released.

According to a further scheme of the utility model, upright posts matched with the locking blocks are correspondingly arranged on the left counterweight base and the right counterweight base, the locking mechanism releases the locking of the locking disc when the upright posts are matched with the locking blocks, and counterweight plate positioning grooves for positioning and placing counterweight plates are correspondingly arranged on the left counterweight base and the right counterweight base.

After adopting above-mentioned structure, have following advantage and effect compared with prior art: because the dumbbell rod and two ends of the barbell rod and one end of the kettle bell handle are correspondingly provided with the balance weight joints, the balance weight joints are provided with button grooves, the button grooves are provided with lock pin holes and guide holes, the balance weight shaft of the balance weight assembly is provided with lock pins and guide pins, the button is axially movably arranged on the balance weight joints through the cooperation of the guide pins and the guide holes, and when the dumbbell is used as a dumbbell, the balance weight joints at two ends of the dumbbell rod are matched with the lock holes to form a balance weight adjustable dumbbell with the left and right balance weight assemblies through the cooperation of the lock pins and the guide pins; when the barbell is used as a barbell, the left weight seat and the right weight seat are of separate structures, and weight joints at two ends of the barbell rod are matched with the lock holes through lock pins and form a weight-adjustable barbell with the left weight assembly and the right weight assembly; when the kettle bell is used as a kettle bell, the left counterweight base and the right counterweight base are of a separation or hinge structure, and a counterweight joint of the kettle bell handle is matched with a lock hole through a lock pin to form a counterweight adjustable kettle bell with one counterweight assembly; the balance weight adjusting functions of the dumbbell, the barbell and the kettle bell are quickly realized through the changes of the left and right balance weight bases and the connecting handles, so that the comprehensive utilization rate of the trainer can be greatly improved, the purchase cost can be greatly reduced, the packaging volume is reduced, and the storage space is reduced.

Drawings

Fig. 1 is a perspective view of the dumbbell of this utility model in use.

FIG. 2 is an exploded view of the weight assembly and dumbbell bar of the present utility model when used as a dumbbell.

Fig. 3 is an exploded view of the dumbbell of this utility model when used as a dumbbell.

FIG. 4 is a diagram showing the configuration of the cooperation of the push button and the dumbbell bar when the present utility model is used as a dumbbell.

Fig. 5 is a diagram of the mating structure of the dumbbell of this utility model when used as a dumbbell.

Fig. 6 is an exploded view of the counterweight assembly of the utility model.

Fig. 7 is a perspective view of the present utility model when used as a barbell.

Fig. 8 is an exploded view of a bar of the present utility model when used as a barbell.

Fig. 9 is a diagram showing the configuration of the barbell according to the present utility model.

Fig. 10 is a perspective view of the present utility model in use as a kettlebell.

Fig. 11 is an exploded view of the counterweight assembly and handle of the kettle bell of the present utility model in use as a kettle bell.

Wherein 1 weight base, 2 dumbbell rod, 3 weight assembly, 4 weight stack, 5 weight frame, 6 weight shaft, 7 button, 8 lock pin, 9 guide pin, 10 guide hole, 11 lock pin hole, 12 joint magnet, 13 elastic weight mechanism, 14 weight stack positioning slot, 15 column, 16 left weight base, 17 lock pin, 18 right weight base, 19 button magnet, 20 lock hole, 21 weight indicating disk, 22 lock notch, 23 lock disk, 24 gear positioning grooves, 25 elastic positioning beads, 26 end covers, 27 isolating sheets, 28 first weight seats, 29 second weight seats, 30 third weight seats, 31 fourth weight seats, 32 left pressure plates, 33 weight locking pins, 34 return springs, 35 right pressure plates, 36 springs, 37 locking blocks, 38 barbell bars, 39 left barbell bars, 40 right barbell bars, 41 weight joints, 42 button grooves, 43 connecting bars and 44 kettle bell handles.

Description of the embodiments

Fig. 1 to 11 show a specific embodiment of a training device capable of freely combining a dumbbell, a barbell and a kettle bell according to the utility model, which comprises a left weight assembly 3, a right weight base 1, a dumbbell rod 2, a barbell rod 38, a kettle bell handle 44 and a button 7, wherein the weight base 1 comprises left weight bases 16 and right weight bases 18, the left weight bases 16 and the right weight bases 18 are mutually hinged through bolts 17, two ends of the dumbbell rod 2 and the barbell rod 38 and one end of the kettle bell handle 44 are correspondingly provided with weight joints 41, the weight joints 41 are provided with button grooves 42, the button grooves 42 are provided with lock pin holes 11 and guide holes 10, a lock hole 20 is arranged on a weight shaft 6 of the weight assembly 3, the button 7 is provided with lock pins 8 and guide pins 9, the button 7 is matched with the button grooves 42 in an axially movable manner through the matching of the guide pins 9 and is matched with the lock holes 20.

In order to ensure that the left and right weight assemblies 3 are reliably connected with the dumbbell rod 2, the barbell rod 38 and the kettle bell handle 44, the button 7 is provided with a button magnet 19, and the weight joint 41 is provided with a joint magnet 12 for attracting the magnetism of the button magnet 19.

In order to facilitate the weight balancing, the weight balancing assembly 3 comprises four weight plates 4, a weight balancing frame 5, an end cover 26 fixed on the weight balancing frame 5 and a weight balancing shaft 6, wherein the weight balancing frame 5 is rotatably arranged on the weight balancing shaft 6, first to fourth weight seats 28, 29, 30 and 31 matched with the weight plates 4 are fixed on the weight balancing shaft 6 between the end cover 26 and the weight balancing frame 5, a separation plate 27 capable of rotating relative to the weight balancing shaft 6 is correspondingly arranged between the adjacent weight balancing seats, the separation plate 27 is positioned on the weight balancing frame 5, circular arc notches and uniformly distributed locking grooves are correspondingly arranged on each weight balancing seat according to weight balancing order, and an elastic weight balancing mechanism 13 matched with the locking grooves is arranged on the weight balancing plate 4; the weight plate 4 is locked when the elastic weight mechanism 13 is combined with the locking groove. The circular arc notch on the first weight seat 28 is a weight starting point, and the circular arc notches on the second to fourth weight seats 29, 30 and 31 are increased by 72 degrees one by one.

In order to ensure reliable hanging, the elastic weight balancing mechanism 13 comprises left and right pressing plates 32, 35, a weight balancing lock pin 33 and a return spring 34, wherein the weight balancing lock pin 33 can be elastically reset and installed on the weight plate 4 through the left and right pressing plates 32, 35 and the return spring 34, and a ball head matched with the locking groove is arranged on the weight balancing lock pin 33.

In order to ensure reliable locking and direct reading of the weight of the dumbbell, the balance weight frame 5 is provided with a gear mark matched with the locking groove, the balance weight shaft 6 is provided with a locking disc 23 and a balance weight indicating disc 21, the locking disc 23 is provided with a locking notch 22 corresponding to the locking groove so as to use a gear positioning groove 24 corresponding to the locking notch 22, the balance weight frame 5 is provided with an elastic positioning bead 25 matched with the gear positioning groove 24, and the elastic positioning bead 25 can ensure clear gear engaging hand feeling when the balance weight is adjusted; when the indication position of the weight indication disc 21 corresponds to the weight gear, the locking notch 22 on the locking disc 23 corresponds to the locking groove position of the gear mark. The counterweight frame 5 is provided with a locking mechanism for locking the counterweight frame 5 to rotate relative to the locking disc 23, the locking mechanism comprises a spring 36 and a locking block 37, and the locking block 37 is provided with a guide groove matched with the locking disc 23; when the locking block 37 is jacked up, the guide groove on the locking block 37 coincides with the outer ring of the locking disc 23, and the locking disc 23 can rotate relative to the locking block 37; the lock block 37 catches the lock notch 22 to prevent rotation of the lock disk 23 when the lock block 37 is released. The left and right counterweight bases 16 and 18 are correspondingly provided with upright posts 15 matched with the locking blocks 37, the locking mechanism releases the locking of the locking disc 23 when the upright posts 15 are matched with the locking blocks 37, and the left and right counterweight bases 16 and 18 are correspondingly provided with counterweight positioning grooves 14 for positioning and placing the counterweight 4.

When the dumbbell is used as a dumbbell, as shown in fig. 1 to 5, the left counterweight base 16 and the right counterweight base 18 are connected into a whole through the bolt 17, the counterweight connector 41 and the corresponding dumbbell rod 2 are of an integral structure, and the counterweight connectors 41 at two ends of the dumbbell rod 2 are matched with the lock holes 20 through the lock pins 8 to form the counterweight adjustable dumbbell with the left counterweight assembly 3 and the right counterweight assembly 3.

When the balance weight is adjusted, firstly, the dumbbell is placed into the left balance weight base 16 and the right balance weight base 18, as shown in fig. 1 and 5, the upright post 15 jacks up the locking block 37, so that the guide groove on the locking block 37 coincides with the outer ring of the locking disc 23 to unlock, at this time, the dumbbell rod 2 is rotated, and the dumbbell rod 2 can drive the locking disc 23, the balance weight indicating disc 21 and the first to fourth balance weight seats 28, 29, 30 and 31 to synchronously rotate through the balance weight shaft 6, and the balance weight lock pins 33 on the four balance weight pieces 4 are sequentially separated from the circular arc notch on the first to fourth balance weight seats 28, 29, 30 and 31 to slide in from the inclined planes of the balance weight seats in a matched manner, so that the ball heads of the balance weight lock pins 33 are matched and locked with the corresponding locking grooves to realize balance weight adjustment.

When the dumbbell is lifted, the upright posts 15 are separated from the locking blocks 37, the locking blocks 37 reset under the action of the elasticity of the springs 36, and the locking blocks 37 prevent the dumbbell rod 2 from rotating relative to the counterweight frame 5 through the locking discs 23, so that locking is realized, the counterweight plates 4 are reliably connected with the elastic counterweight mechanism 13 in the training process, the use safety is ensured, and the counterweight plates 4 which are not selected to be hung are reserved on the dumbbell plate positioning grooves 14 corresponding to the left counterweight base 16 and the right counterweight base 18.

In first gear, the balance weight lock pins 33 on the four balance weight pieces 4 are matched with the circular arc notches on the corresponding first to fourth balance weight seats 28, 29, 30 and 31, namely, the balance weight frame 5 is not hung with the balance weight pieces 4, and the dumbbell has the lightest weight and only has the weight of the balance weight frame 5.

In the second gear, the dumbbell rod 2 rotates by 72 degrees relatively, the balance weight lock pin 33 on the first balance weight piece 4 at the innermost side is matched with the first locking groove on the first balance weight seat 28 to realize hanging, the other three balance weight pieces 4 are matched with the arc notches on the second to fourth balance weight seats 29, 30 and 31 to form a neutral position, and the balance weight frame 5 is correspondingly connected with the first balance weight piece 4 at the innermost side in a hanging mode.

In third gear, the dumbbell rod 2 continues to rotate for 72 degrees, namely 144 degrees, the balance weight lock pin 33 on the first balance weight piece 4 on the inner side is matched with the second locking groove on the first balance weight seat 28 to realize hanging, the balance weight lock pin 33 on the second balance weight piece 4 on the inner side is matched with the first locking groove on the second balance weight seat 29 to realize hanging, the other two balance weight pieces 4 are matched with the arc-shaped notches on the third balance weight seat 30 and the fourth balance weight seat 31, namely neutral, and the balance weight frame 5 is correspondingly connected with the first balance weight piece 4 and the second balance weight piece 4 on the inner side in a hanging mode.

In fourth gear, the dumbbell rod 2 continues to rotate for 72 degrees, namely 216 degrees, the balance weight lock pin 33 on the first balance weight piece 4 on the inner side is matched with the third locking groove on the first balance weight seat 28 to achieve hanging pieces, the balance weight lock pin 33 on the second balance weight piece 4 is matched with the second locking groove on the second balance weight seat 29 to achieve hanging pieces, the balance weight lock pin 33 on the third balance weight piece 4 is matched with the first locking groove on the third balance weight seat 30 to achieve hanging pieces, the last balance weight piece 4 is matched with the arc notch on the fourth balance weight seat 31 to achieve neutral, and the balance weight frame 5 is correspondingly connected with the first balance weight piece 4, the second balance weight piece and the third balance weight piece 4 on the inner side in a hanging mode.

In fifth gear, the dumbbell rod 2 continues to rotate for 72 degrees, namely 288 degrees, the balance weight lock pin 33 on the first balance weight piece 4 on the inner side is matched with the fourth locking groove 32 on the first balance weight seat 28 to achieve hanging pieces, the balance weight lock pin 33 on the second balance weight piece 4 is matched with the third locking groove 32 on the second balance weight seat 29 to achieve hanging pieces, the balance weight lock pin 33 on the third balance weight piece 4 is matched with the second locking groove on the third balance weight seat 30 to achieve hanging pieces, the last balance weight piece 4 is matched with the locking groove on the fourth balance weight seat 31 to achieve hanging pieces, the balance weight frame 5 is correspondingly connected with the four balance weight pieces 4 in a hanging mode, at the moment, the balance weight frame 5 achieves all hanging pieces, and the dumbbell weight is the heaviest.

When the dumbbell rod 2 continues to rotate 72 degrees, namely 360 degrees, the dumbbell rod returns to the first gear state, the balance weight lock pins 33 on the four balance weight pieces 4 are matched with the circular arc notches on the corresponding first to fourth balance weight seats 28, 29, 30 and 31, namely, the balance weight frame 5 is free of the balance weight pieces 4.

When the utility model is used as a barbell, as shown in fig. 7 to 9, the left and right weight seats 16 and 18 are in a separated structure, the barbell bar 38 comprises left and right barbell bars 39 and 40, weight joints 41 and connecting rods 43 correspondingly fixed at two ends of the left and right barbell bars 39 and 40, the connecting rods 43 are detachably fixed at the weight joints 41 between the left and right barbell bars 39 and 40, and two ends of the left and right barbell bars 39 and 40 are correspondingly provided with button holes matched with button grooves 42 of the weight joints 41. The balance weight joints 41 at the two ends of the barbell bar 38 are matched with the lock hole 20 through the lock pin 8 and form the balance weight adjustable barbell with the left and right balance weight assemblies 3. The barbell weight adjustment is the same as the dumbbell weight adjustment and will not be repeated here.

When the kettle bell is used as the kettle bell, as shown in fig. 10 and 11, the left counterweight base 16 and the right counterweight base 18 are hinged through the bolt 17, and of course, the bolt 17 can be pulled out to separate the left counterweight base 16 from the right counterweight base 18, the counterweight joint 41 and the kettle bell handle 44 are of an integral structure, and the counterweight joint 41 of the kettle bell handle 44 is matched with the lock hole 20 through the lock pin 8 to form the counterweight adjustable kettle bell with one counterweight assembly 3. The barbell weight adjustment is the same as the single sided dumbbell weight adjustment and will not be repeated here.

The above embodiments of the present utility model are not intended to limit the present utility model in any way, and the present utility model is not limited to the above embodiments, but is capable of modification, equivalent changes or modification without departing from the technical solution of the present utility model.

Claims (10)

1. The utility model provides a training ware that can freely make up dumbbell, barbell and kettle bell, includes control counter weight assembly (3), counter weight base (1), dumbbell pole (2), barbell pole (38), kettle bell handle (44), button (7), characterized by: the balance weight base (1) comprises a left balance weight base (16) and a right balance weight base (18), a balance weight joint (41) is correspondingly arranged at two ends of a dumbbell rod (2) and a barbell rod (38) and one end of a kettle bell handle (44), a button groove (42) is formed in the balance weight joint (41), a lock pin hole (11) and a guide hole (10) are formed in the button groove (42), a lock hole (20) is formed in a balance weight shaft (6) of the balance weight assembly (3), a lock pin (8) and a guide pin (9) are arranged on the button (7), the button (7) is axially movably arranged on the balance weight joint (41) through the cooperation of the guide pin (9) and the guide hole (10), the button (7) is matched with the button groove (42), and the lock pin (8) is arranged on the lock pin hole (11) and is matched with the lock hole (20); when the training device is used as a dumbbell, the left counterweight base (16) and the right counterweight base (18) are of an integrated structure, and the counterweight joints (41) at the two ends of the dumbbell rod (2) are matched with the lock hole (20) through the lock pin (8) to form a counterweight adjustable dumbbell with the left counterweight assembly and the right counterweight assembly (3); when the training device is used as a barbell, the left weight seat and the right weight seat (16, 18) are of separate structures, and the weight joints (41) at the two ends of the barbell rod (38) are matched with the lock hole (20) through the lock pin (8) to form a weight-adjustable barbell with the left weight assembly and the right weight assembly (3); when the training device is used as a kettle bell, the left counterweight base (16) and the right counterweight base (18) are of separate or hinged structures, and the counterweight joint (41) of the kettle bell handle (44) is matched with the lock hole (20) through the lock pin (8) to form the counterweight adjustable kettle bell with one counterweight assembly (3).

2. The exercise machine capable of freely combining dumbbell, barbell and ketbell according to claim 1, wherein: the button (7) is provided with a button magnetic block (19), and the counterweight joint (41) is provided with a joint magnetic block (12) for attracting the magnetism of the button magnetic block (19).

3. The exercise machine capable of freely combining dumbbell, barbell and ketbell according to claim 2, wherein: the balance weight joint (41) of the dumbbell rod (2) and the kettle bell handle (44) and the corresponding dumbbell rod (2) and kettle bell handle (44) are of an integrated structure.

4. The exercise machine capable of freely combining dumbbell, barbell and ketbell according to claim 2, wherein: the barbell bar (38) comprises a left barbell bar (39) and a right barbell bar (40), weight joints (41) correspondingly fixed at two ends of the left barbell bar and the right barbell bar (39, 40), a connecting rod (43), the connecting rod (43) is detachably fixed between the left barbell bar and the right barbell bar (39, 40), and button holes matched with button grooves (42) of the weight joints (41) are correspondingly formed at two ends of the left barbell bar and the right barbell bar (39, 40).

5. The exercise machine of claim 3 or 4, wherein the exercise machine comprises: the counterweight assembly (3) comprises four counterweight plates (4), a counterweight frame (5), end covers (26) fixed on the counterweight frame (5) and a counterweight shaft (6), the counterweight frame (5) is rotatably arranged on the counterweight shaft (6), first to fourth counterweight seats (28, 29, 30 and 31) matched with the counterweight plates (4) are fixed on the counterweight shaft (6) between the end covers (26) and the counterweight frame (5), isolating plates (27) capable of rotating relative to the counterweight shaft (6) are correspondingly arranged between adjacent counterweight seats, the isolating plates (27) are positioned on the counterweight frame (5), arc notches and uniformly distributed locking grooves are correspondingly arranged on each counterweight seat according to counterweight sequencing, and an elastic counterweight mechanism (13) matched with the locking grooves is arranged on the counterweight plates (4); the weight plate (4) is locked when the elastic weight mechanism (13) is combined with the locking groove.

6. The exercise machine capable of freely combining dumbbell, barbell and kettlebell of claim 5, wherein: the elastic counterweight mechanism (13) comprises a left pressing plate (32) and a right pressing plate (35), a counterweight lock pin (33) and a reset spring (34), wherein the counterweight lock pin (33) is installed on the counterweight sheet (4) in an elastic reset mode through the left pressing plate (32) and the right pressing plate (35) and the reset spring (34), and a ball head matched with the locking groove is arranged on the counterweight lock pin (33).

7. The exercise machine capable of freely combining dumbbell, barbell and kettlebell of claim 6, wherein: the arc notch on the first counterweight seat (28) is a counterweight starting point, and the arc notches on the second to fourth counterweight seats (29, 30 and 31) are gradually increased by 72 degrees.

8. The exercise machine capable of freely combining dumbbell, barbell and kettlebell of claim 7, wherein: the counterweight frame (5) is provided with a gear mark matched with the locking groove, the counterweight shaft (6) is provided with a locking disc (23) and a counterweight indicating disc (21), the locking disc (23) is provided with a locking notch (22) corresponding to the locking groove so as to use a gear positioning groove (24) corresponding to the locking notch (22), and the counterweight frame (5) is provided with an elastic positioning bead (25) matched with the gear positioning groove (24); when the indication position of the counterweight indication disc (21) corresponds to the counterweight gear, the locking notch (22) on the locking disc (23) corresponds to the locking groove position of the gear mark.

9. The exercise machine capable of freely combining dumbbell, barbell and kettlebell of claim 8, wherein: the counterweight frame (5) is provided with a locking mechanism for locking the counterweight frame (5) to rotate relative to the locking disc (23), the locking mechanism comprises a spring (36) and a locking block (37), and the locking block (37) is provided with a guide groove matched with the locking disc (23); when the locking block (37) is jacked up, the guide groove on the locking block (37) is overlapped with the outer ring of the locking disc (23), and the locking disc (23) can rotate relative to the locking block (37); the locking block (37) blocks the locking notch (22) when the locking block (37) is released to prevent the locking disc (23) from rotating.

10. The exercise machine capable of freely combining dumbbell, barbell and kettlebell according to claim 9, wherein: the left counterweight base (16) and the right counterweight base (18) are correspondingly provided with upright posts (15) matched with the locking blocks (37), and the locking mechanism releases the locking of the locking disc (23) when the upright posts (15) are matched with the locking blocks (37), and the left counterweight base (16) and the right counterweight base (18) are correspondingly provided with counterweight positioning grooves (14) for positioning and placing the counterweight sheet (4).