CN211836069U

CN211836069U - Novel fitness equipment and counterweight adjusting device thereof

Info

Publication number: CN211836069U
Application number: CN202020158481.XU
Authority: CN
Inventors: 刘佳欢; 王金明
Original assignee: Dachang Hui Autonomous County Xiadian Jiamei Sporting Goods Co ltd
Current assignee: Jiamei Sports Industry Co.,Ltd.
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2020-11-03
Anticipated expiration: 2030-02-10
Also published as: DE102020127318A1

Abstract

A novel fitness equipment and a counterweight adjusting device thereof, wherein the counterweight adjusting device comprises a counterweight block, a positioning unit, a connecting rod, a counterweight rotating shaft, a counterweight arm and a large arc-shaped sliding rail; the counterweight arm is provided with a pivot joint hole; two ends of the large arc-shaped slide rail are respectively fixed on two sides of the counterweight arm pivot hole, and the circle center of the large arc-shaped slide rail is superposed with the pivot hole on the counterweight arm; one end of the connecting rod is connected with the pin joint hole through the counterweight rotating shaft, and the other end of the connecting rod is fixed with the counterweight block and the large arc-shaped slide rail through the positioning unit. The utility model discloses an adjust the position of balancing weight on the arc slide rail, change body-building apparatus's counter weight arm moment to satisfy different users to the regulation of counter weight size, simple structure, convenient operation, manufacturing cost is lower.

Description

Novel fitness equipment and counterweight adjusting device thereof

Technical Field

The utility model relates to a body-building apparatus technical field, in particular to novel body-building apparatus and counter weight adjusting device thereof.

Background

Because the life is busy, modern people generally lack the motion, body-building apparatus can help people to alleviate fatigue, build up body, increases the body-building apparatus of arm strength training and also can alleviate fatigue, build up body. At present, the body-building apparatus who increases the training of arm strength in the market, its reinforcing strength training's balancing weight adopts the bolt formula of increasing balancing weight quantity more to adjust, and this just needs body-building apparatus firm to produce the balancing weight of a plurality of equal or different weights to the strength training needs of different training personnel of cooperation, though this kind of balancing weight production is simple, but production quantity is various, and the assembly is loaded down with trivial details, and the cost is higher, is unfavorable for transportation, storage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel body-building apparatus and counter weight adjusting device thereof, its counter weight adjusting device accessible is adjusted the position of balancing weight on the arc slide rail, changes the moment of counter weight arm to satisfy different users to the regulation of body-building apparatus counter weight size, simple structure, convenient operation, manufacturing cost is lower.

In order to achieve the above object, the solution of the present invention is: a counterweight adjusting device comprises a counterweight block, a positioning unit, a connecting rod, a counterweight rotating shaft, a counterweight arm and a large arc-shaped sliding rail; the counterweight arm is provided with a pivot joint hole; two ends of the large arc-shaped slide rail are respectively fixed on two sides of the counterweight arm pivot hole, and the circle center of the large arc-shaped slide rail is superposed with the pivot hole on the counterweight arm; one end of the connecting rod is connected with the pin joint hole through the counterweight rotating shaft, and the other end of the connecting rod is fixed with the counterweight block and the large arc-shaped slide rail through the positioning unit.

Furthermore, the positioning unit at least comprises a positioning pin, a bolt, a counterweight fixing disc and an installation cylinder; the mounting cylinder is of a hollow structure, one end of the mounting cylinder is at least provided with a clamping lug, and the clamping lug is provided with a mounting hole; the counterweight fixing disc is inserted into the hollow cavity of the mounting cylinder and is locked with the mounting hole through a bolt, and the positioning pin penetrates through the counterweight fixing disc and extends to the outer side of the mounting cylinder.

Furthermore, the positioning pin comprises a pulling plug, a fixing nut, a pin rod, a spring, a limiting head and a plug-in connector; the limiting head is positioned on the left side of the plug-in connector and connected with the pin rod; the fixing nut is positioned on the right side of the pulling plug and connected with the pin rod; the pin rod is sleeved with a spring.

Furthermore, the counterweight fixing disc at least comprises a limiting end face, a first through hole, a second through hole and an inserted rod; the first through hole is communicated with the inserted rod; the second through hole is formed in the limiting end face, and a blocking piece is arranged in the first through hole.

Furthermore, the connecting rod comprises a fixed seat, a connecting rod and a mounting seat; the mounting seat is positioned at one end of the connecting rod, the fixed seat is positioned at the other end of the connecting rod, the fixed seat is of a hollow structure, and one end of the fixed seat is at least provided with an open slot; the mounting seat is provided with a connecting hole.

Furthermore, the counterweight rotating shaft comprises a mounting sleeve, a mounting shaft, a fixed shaft and a limiting shaft seat; the diameters of the installation shaft, the fixed shaft and the limiting shaft seat are gradually increased, the limiting shaft seat is fixed in a pin joint hole of the counterweight arm, and the installation sleeve is sleeved on the installation shaft.

Further, the counterweight arm comprises a torque axis base and a driving arm; the moment axle center seat is of a hollow structure and is positioned at one end of the driving arm.

Furthermore, the large arc-shaped slide rail is at least provided with two fixing holes.

A novel fitness apparatus comprises two handrails, a main frame and two counterweight adjusting devices as described above; the handrail is fixed on a driving arm of a counterweight arm in the counterweight adjusting device, the handrail is positioned at the other end of the driving arm, and the two counterweight adjusting devices are respectively and rotatably connected to the two sides of the main frame through moment axle center seats.

Furthermore, the main frame at least comprises two connecting plates, a connecting cross frame, a front bracket and two rear brackets; the connecting transverse frame is arranged above the two rear supports and is fixedly connected with the top ends of the two rear supports; each connecting plate is provided with a connecting hole, and each connecting hole comprises a first connecting hole and a second connecting hole; the connecting plates are sleeved on the connecting cross frame through second connecting holes, each two counterweight adjusting devices are arranged between two adjacent connecting plates, and the moment axle center seats of the two counterweight adjusting devices are hinged with the first connecting holes of the connecting plates through hinge shafts; the front bracket is obliquely fixed in the middle of the connecting transverse frame.

Compared with the prior art, the utility model has the advantages that: by adopting the counterweight adjusting device, when a user trains the arm strength through the fitness equipment, the counterweight can be adjusted according to the actual requirements of the user, so that the moment of the counterweight arm is changed, the counterweight weight is increased or reduced, and the counterweight adjusting device is simple in structure and convenient and fast to operate; because the utility model discloses every unilateral only needs to adopt a balancing weight can realize the regulation of different counterweights, and its manufacturing cost is lower, and is convenient for transport, store.

Drawings

Fig. 1 is a schematic front view of the counterweight adjustment device of the present invention;

FIG. 2 is a schematic side view of the counterweight adjustment device according to the present invention;

FIG. 3 is an enlarged cross-sectional view taken along line A of FIG. 2 according to the present invention;

fig. 4 is an exploded view of the counterweight adjustment device of the present invention;

FIG. 5 is an enlarged schematic view of the structure of FIG. 4B according to the present invention;

fig. 6 is a schematic structural view of the positioning pin of the present invention;

fig. 7 is a schematic structural view of the counterweight fixing disk of the present invention;

fig. 8 is a schematic view of a use state of the counterweight adjustment device according to the present invention;

FIG. 9 is a schematic diagram of an exercise apparatus with a counterweight adjustment device;

fig. 10 is a front view of an exercise apparatus with a counterweight adjustment device.

Reference numerals: the weight adjusting device 1, the hinge shaft 1 ', the counterweight 11, the positioning unit 12, the positioning pin 121, the plug 1211, the fixing nut 1212, the pin 1213, the spring 1214, the limit head 1215, the connector 1216, the bolt 122, the weight fixing plate 123, the stopper 123 ', the first through hole 1231, the limit end surface 1232, the second through hole 1233, the plug 1234, the mounting cylinder 124, the engaging protrusion 125, the mounting hole 126, the connecting rod 13, the fixing seat 131, the connecting rod 132, the mounting seat 133, the mounting hole 133 ', the open slot 134, the weight rotating shaft 14, the shaft body 14 ', the mounting sleeve 141, the mounting shaft 142, the fixing shaft 143, the limit shaft seat 144, the weight arm 15, the moment shaft seat 151, the driving arm 152, the small arc slide rail 16, the large arc slide rail 17, the fixing hole 17 ', the first fixing hole 171, the second fixing hole 172, the third fixing hole 173, the fourth fixing hole 174, the fifth fixing hole 175, the main frame 2, the connecting plate, The connecting holes 21', the first connecting holes 211, the second connecting holes 212, the connecting cross frame 22, the front support 23, the bottom frame 231, the short inclined frame 232, the arc-shaped connecting frame 233, the long inclined frame 234, the rear support 24, the supporting rod 241, the vertical rod 242, the bottom rod 243, the first connecting frame 25, the second connecting frame 26, the fixed feet 27, the armrests 3, the back cushion 4, the seat cushion 5 and the fitness equipment 100.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The first embodiment is as follows:

as shown in fig. 1-8, a counterweight adjusting device 1 includes a counterweight 11, a positioning unit 12, a connecting rod 13, a counterweight rotating shaft 14, a counterweight arm 15, and a large arc-shaped slide rail 17; the counterweight arm 15 comprises a moment axle center seat 151 and a driving arm 152; the moment axis seat 151 is of a hollow structure, and the moment axis seat 151 and the driving arm 152 are integrally formed and located at one end of the driving arm 152; the middle section of the counterweight arm 15 is provided with a pivot hole (not shown in the figure); two ends of the large arc-shaped slide rail 17 are respectively and fixedly connected to two sides of the pivot hole of the counterweight arm 15, and the circle center of the large arc-shaped slide rail 17 is superposed with the pivot hole on the counterweight arm 15; one end of the connecting rod 13 is pivotally connected and fixed with the pivot hole through the counterweight rotating shaft 14, and the other end of the connecting rod 13 is fixed with the connecting rod 13 and the large arc-shaped sliding rail 17 through the positioning unit 12.

The torque axis seat 151 is not limited to be integrally formed with the driving arm 152, and may be welded to the driving arm 152.

The counterweight adjusting device 1 further comprises a small arc-shaped slide rail 16; two ends of the small arc-shaped slide rail 16 are respectively and fixedly connected to two sides of a pivot hole of the counterweight arm 15 in the large arc-shaped slide rail 17, the circle center of the small arc-shaped slide rail 16 is overlapped with the pivot hole on the counterweight arm 15, and the small arc-shaped slide rail 16 is used for reinforcing the counterweight adjusting device 1.

The positioning unit 12 comprises a positioning pin 121, three bolts 122, a counterweight fixing disc 123 and an installation cylinder 124; the mounting cylinder 124 is a hollow structure, and the mounting cylinder 124 is placed in a hollow cavity of the fixing seat 131; one end of the mounting cylinder 124, which faces the limiting end face 1232 of the counterweight fixing disc 123, is provided with a three-clamping convex block 125, and a mounting hole 126 is formed in the clamping convex block 125; the counterweight fixing disc 123 is inserted into the hollow cavity of the mounting cylinder 124 and is locked with the mounting hole 126 of the mounting cylinder 124 through the bolt 122, so that the counterweight fixing disc 123 and the mounting cylinder 124 are assembled; the positioning pin 121 passes through the weight fixing disk 123 and extends to the outside of the mounting cylinder 124.

The positioning pin 121 comprises a plug 1211, a fixing nut 1212, a pin 1213, a spring 1214, a stopper 1215 and a plug 1216; one end of the pin 1213 is connected with the limit head 1215 and the plug 1216 in sequence; the other end of the pin 1213 is connected with the fixed nut 1212 and the plug 1211 in a threaded manner in turn; the pin 1213 is sleeved with a spring 1214.

The weight fixing plate 123 includes a limiting end surface 1232, three second through holes 1233, and an inserting rod 1234; the inserted link 1234 is integrally formed with the limiting end surface 1232 and is located at the center of one side of the limiting end surface 1232; the second through holes 1233 are arranged on the limiting end surface 1232 at equal intervals along the circumferential direction of the inserted link 1234; the weight fixing plate 123 further includes a first through hole 1231 penetrating through the limiting end surface 1232 and the center of the insert rod 1234, the inside of the first through hole 1231 further includes a stopper 123 ', one end of the spring 1214 abuts against the limiting head 1215, and the other end abuts against the stopper 123 ' in the first through hole 1231 of the weight fixing plate 123, so that the stopper 123 ' and the limiting head 1215 can press the spring 1214 to realize elastic reset of the insert head 1216.

The connecting rod 13 comprises a fixed seat 131, a connecting rod 132 and a mounting seat 133; the mounting seat 133 and the connecting rod 132 are integrally formed and located at one end of the connecting rod 132, the mounting seat 133 is provided with an assembling hole 133', the fixing seat 131 and the connecting rod 132 are integrally formed and located at the other end of the connecting rod 132, the fixing seat 131 is of a hollow structure, three stepped open grooves 134 are formed at intervals at one end of the fixing seat 131 facing the counterweight fixing disk 123, the clamping convex block 125 is clamped with a larger opening of the stepped open groove 134 of the fixing seat 131, and the mounting cylinder 12 and the fixing seat 131 are assembled; the counterweight block 11 is sleeved on the fixed seat 131, and two sides of the counterweight block 11 are respectively abutted against the limiting end surface 1232 and the connecting rod 132, so that the counterweight block 11 is limited on the fixed seat 131 through the limiting end surface 1232 and the connecting rod 132, the counterweight block 11 is effectively prevented from loosening and falling in the use process, and the connecting rod 13 is conveniently assembled with the counterweight block 11 and the positioning unit 12; the mounting seat 133 is provided with a coupling hole 133'.

The connecting rod 132 is used as a connecting member, and is not limited to be integrally formed with the fixing seat 131 and the mounting seat 133, and can also be welded and fixed with the fixing seat 131 and the mounting seat 133.

The counterweight rotating shaft 14 comprises a mounting sleeve 141 and a shaft body 14'; the shaft body 14' comprises a mounting shaft 142, a fixing shaft 143 and a limit shaft seat 144; the diameters of the mounting shaft 142, the fixing shaft 143 and the limiting shaft seat 144 are gradually increased, and the mounting shaft 142, the fixing shaft 143 and the limiting shaft seat 144 are integrally formed; the mounting shaft 142 and the limiting shaft seat 144 are respectively located at two ends of the fixing shaft 143, the limiting shaft seat 144 and the counterweight arm 15 are screwed, welded or integrally formed through a pivot hole, the shaft body 14 ' passes through the assembly hole 133 ', and the mounting shaft 142 of the shaft body 14 ' extends to the outer side of the connecting rod 132; the mounting sleeve 141 is clamped or screwed on the mounting shaft 142 of the shaft body 14 'to lock or unlock the connecting rod 13 sleeved on the fixing shaft 143 of the shaft body 14', so that the connecting rod 13 can be conveniently rotated at a fixed point through the counterweight rotating shaft 14, and the connecting rod 13 is prevented from loosening and falling off due to front and rear displacement in the rotating process.

The large arc-shaped slide rail 17 further includes fixing holes 17 ', in this embodiment, the fixing holes 17' include a first fixing hole 171, a second fixing hole 172, a third fixing hole 173, a fourth fixing hole 174, and a fifth fixing hole 175, the first fixing hole 171, the second fixing hole 172, the third fixing hole 173, the fourth fixing hole 174, and the fifth fixing hole 175 are sequentially disposed at equal intervals along the arc direction of the large arc-shaped slide rail 17, and when the connecting rod 13 rotates around the counterweight rotating shaft 14, the positions of the counterweight blocks 11 on the large arc-shaped slide rail 17 can be determined through the fixing holes 17 'at different positions, so as to change the moment of the counterweight arm 15, so as to meet different strength training counterweight requirements of different users, and during actual production, the number of the fixing holes 17' can be increased or decreased as needed.

The installation sequence of the embodiment of the application is as follows: the mounting cylinder 124 is placed in the hollow cavity of the fixing seat 131, the counterweight block 11 is sleeved on the fixing seat 131, the inserted link 1234 of the counterweight fixing disk 123 is inserted into the hollow cavity of the mounting cylinder 124, the bolt 122 sequentially passes through the second through hole 1233 to be locked with the mounting hole 126 on the mounting cylinder 124, the pin 1213 sleeved with the spring 1214 passes through the first through hole 1231 of the counterweight fixing disk 123 from the end of the fixing seat 131 opposite to the counterweight fixing disk 123, and is sequentially screwed with the fixing nut 1212 and the plug 1211; then, the mounting seat 133 of the connecting rod 13 is sleeved on the shaft body 14 ', the mounting sleeve 141 is clamped or screwed on the mounting shaft 142 of the shaft body 14 ', the connecting rod 13 is rotated to move the counterweight block 11 to the fixing hole 17 ', the positioning pin 121 causes the spring 1214 on the pin rod 1213 to rebound due to the yielding of the hole groove of the fixing hole 17 ', and the plug 1216 of the positioning pin 121 is clamped in the fixing hole 17 ' and locked with the large arc-shaped slide rail 17.

The user can be according to the position that actual training demand adjusted balancing weight 11 when carrying out the arm strength training, specifically is: the counterweight block 11 is locked at the first fixing hole 171, the positioning pin 121 is pulled, the spring 1214 on the pin rod 1213 is compressed by the resistance of the blocking piece 123', so that the plug-in connector 1216 of the positioning pin 121 is separated from the first fixing hole 171, the counterweight block 11 rotates along with the connecting rod 13 around the counterweight rotating shaft 14 and slides along the large arc-shaped sliding rail 17 to the second fixing hole 172, the third fixing hole 173, the fourth fixing hole 174 or the fifth fixing hole 175, the positioning pin 121 is released, the spring 1214 on the pin rod 1213 rebounds, and the plug-in connector 1216 is rebounded into the second fixing hole 172, the third fixing hole 173, the fourth fixing hole 174 or the fifth fixing hole 175, so as to change the moment of the counterweight arm 15, and meet the requirements of users for different counterweight sizes.

As shown in fig. 9 and 10, a novel body-building device 6 comprises two handrails 3, a main frame 2, and two counterweight adjusting devices 1; the handrail 3 is fixed on a driving arm 152 of a counterweight arm 15 in the counterweight adjusting device 1, the handrail 3 is positioned at the other end of the driving arm 152, the counterweight adjusting devices 1 are respectively and rotatably connected to two sides of the main frame 2 through a moment axle center seat 151, and a user can push the counterweight adjusting device 1 to rotate around the main frame 2 through the handrail 3 to carry out arm strength training.

The main frame 2 comprises four connecting plates 21, a connecting cross frame 22, a front support 23, two rear supports 24, a first connecting frame 25, two second connecting frames 26 and three fixing feet 27; two ends of the first connecting frame 25 are respectively fixedly connected with the two rear brackets 24 and are positioned at the middle lower parts of the two rear brackets 24; the connecting cross frame 22 is arranged above the two rear brackets 24 and is fixedly connected with the top ends of the two rear brackets 24, and both ends of the connecting cross frame 22 slightly protrude out of the two rear brackets 24; each connecting plate 21 is provided with a connecting hole 21 ', and each connecting hole 21' comprises a first connecting hole 211 and a second connecting hole 212; the connecting plates 21 are fixed on the connecting cross frame 22 through second connecting holes 212, the connecting cross frame 22 above the rear support 24 is provided with two connecting plates 21, the moment axle center seats 151 of each two counterweight adjusting devices 1 are arranged between two adjacent connecting plates 21, and the moment axle center seats 151 of the two counterweight adjusting devices 1 are hinged with the first connecting holes 211 of the connecting plates 21 through hinge shafts 1', so that the counterweight adjusting devices 1 are rotatably connected with the main frame 2; the front bracket 23 is obliquely fixed in the middle of the connecting cross frame 22, the front bracket 23 is flush with the bottom ends of the two rear brackets 24, the three fixing feet 27 are respectively connected with the bottom ends of the front bracket 23 and the two rear brackets 24, and two sides of the front bracket 23 are respectively connected with the two rear brackets 24 through the two second connecting frames 26, so that the main frame 2 is stably placed on the ground through the front bracket 23 and the two rear brackets 24; the main frame 2 further comprises a back cushion 4 and a seat cushion 5 which are connected to the front support 23, so that a user can sit and lean during training, and the use comfort level is improved.

The front bracket 23 is not limited to be welded and fixed with the connecting cross frame 22, and can be integrally formed with the connecting cross frame 22.

The front bracket 23 comprises a bottom bracket 231, a short inclined frame 232, an arc-shaped connecting frame 233 and a long inclined frame 234; the arc-shaped connecting frames 233, the underframe 231 and the long inclined frame 234 are integrally formed and are positioned between the underframe 231 and the long inclined frame 234, the back cushion 4 is welded on the upper end surface of the long inclined frame 234, the two second connecting frames 26 are respectively welded on two sides of the long inclined frame 234 at the bottom of the back cushion 4, and the two second connecting frames 26 and the first connecting frame 25 are positioned on the same transverse horizontal plane and form a triangular structure with the first connecting frame 25; the short inclined frame 232 and the arc-shaped connecting frame 233 are integrally formed and are positioned in the middle of the convex surface of the arc-shaped connecting frame 233, and the included angles among the short inclined frame 232, the base frame 231 and the long inclined frame 234 are all obtuse angles; the seat cushion 5 is welded to the upper end surface of the short inclined frame 232, so that the front bracket 23 forms a frame body for fixing the back cushion 4 and the seat cushion 5.

Each rear bracket 24 comprises a supporting rod 241, a vertical rod 242 and a bottom rod 243; the upright rod 242 and the bottom rod 243 are integrally formed and are positioned at the bottom of the upright rod 242; bracing piece 241 and pole setting 242 integrated into one piece and be located the middle part of pole setting 242, bracing piece 241 is located directly over the second link 26 and sets up along the reverse tilt up of fore-stock 23, the top of bracing piece 241 is contradicted with two counter weight adjusting device 1's counter weight arm 15 bottoms to bracing piece 241 on through after-poppet 24 realizes the support to counter weight adjusting device 1, has guaranteed the stability under the state of stewing after counter weight adjusting device 1 is connected with body frame 2.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A counterweight adjustment device (1), characterized in that: comprises a balancing weight (11), a positioning unit (12), a connecting rod (13), a balancing weight rotating shaft (14), a balancing weight arm (15) and a large arc-shaped sliding rail (17); the counterweight arm (15) is provided with a pivot hole; two ends of the large arc-shaped sliding rail (17) are respectively fixed on two sides of a pivot hole of the counterweight arm (15), and the circle center of the large arc-shaped sliding rail (17) is superposed with the pivot hole on the counterweight arm (15); one end of the connecting rod (13) is connected with the pivot hole through the counterweight rotating shaft (14), and the other end of the connecting rod (13) is fixed with the counterweight block (11) and the large arc-shaped sliding rail (17) through the positioning unit (12).

2. A counterweight adjustment device (1) according to claim 1, characterized in that: the positioning unit (12) at least comprises a positioning pin (121), a bolt (122), a counterweight fixing disc (123) and an installation cylinder (124); the mounting cylinder (124) is of a hollow structure, at least one clamping convex block (125) is arranged at one end of the mounting cylinder (124), and a mounting hole (126) is formed in the clamping convex block (125); the counterweight fixing disc (123) is inserted into the hollow cavity of the mounting cylinder (124) and is locked with the mounting hole (126) of the mounting cylinder (124) through a bolt (122), and the positioning pin (121) penetrates through the counterweight fixing disc (123).

3. A counterweight adjustment device (1) according to claim 2, characterized in that: the positioning pin (121) comprises a pulling plug (1211), a fixing nut (1212), a pin rod (1213), a spring (1214), a limiting head (1215) and a plug connector (1216); the limiting head (1215) is positioned at the left side of the plug connector (1216) and is connected with the pin rod (1213); the fixing nut (1212) is positioned at the right side of the pulling plug (1211) and connected with the pin rod (1213); the pin rod (1213) is sleeved with a spring (1214).

4. A counterweight adjustment device (1) according to claim 2, characterized in that: the counterweight fixing disc (123) at least comprises a limiting end face (1232), a first through hole (1231), a second through hole (1233) and an inserted link (1234); the first through hole (1231) communicates with an insert lever (1234); the second through hole (1233) is arranged on the limiting end face (1232), and a baffle plate (123') is arranged in the first through hole (1231).

5. A counterweight adjustment device (1) according to claim 1, characterized in that: the connecting rod (13) comprises a fixed seat (131), a connecting rod (132) and a mounting seat (133); the mounting seat (133) is positioned at one end of the connecting rod (132), the fixed seat (131) is positioned at the other end of the connecting rod (132), the fixed seat (131) is of a hollow structure, and one end of the fixed seat (131) is at least provided with an open slot (134); the mounting seat (133) is provided with a connecting hole (133').

6. A counterweight adjustment device (1) according to claim 1, characterized in that: the counterweight rotating shaft (14) comprises a mounting sleeve (141), a mounting shaft (142), a fixed shaft (143) and a limiting shaft seat (144); the diameters of the installation shaft (142), the fixed shaft (143) and the limiting shaft seat (144) are gradually increased, the limiting shaft seat (144) is fixed in a pivot hole of the counterweight arm (15), and the installation sleeve (141) is sleeved on the installation shaft (142).

7. A counterweight adjustment device (1) according to claim 1, characterized in that: the counterweight arm (15) comprises a moment axle center seat (151) and a driving arm (152); the moment axle center seat (151) is of a hollow structure, and the moment axle center seat (151) is located at one end of the driving arm (152).

8. A counterweight adjustment device (1) according to claim 1, characterized in that: the large arc-shaped sliding rail (17) is at least provided with two fixing holes (17').

9. A novel fitness equipment (6) is characterized in that: comprising two handrails (3), a main frame (2), two counterweight adjustment devices (1) according to any one of claims 1 to 8; the handrail (3) is fixed on a driving arm (152) of a counterweight arm (15) in the counterweight adjusting device (1), the handrail (3) is positioned at the other end of the driving arm (152), and the counterweight adjusting devices (1) are respectively and rotationally connected to two sides of the main frame (2) through a moment axle center seat (151).

10. A new type of fitness apparatus (6) according to claim 9, characterized in that: the main frame (2) at least comprises two connecting plates (21), a connecting transverse frame (22), a front support (23) and two rear supports (24); the connecting transverse frame (22) is arranged above the two rear brackets (24) and is fixedly connected with the top ends of the two rear brackets (24); each connecting plate (21) is provided with a connecting hole (21 '), and each connecting hole (21') comprises a first connecting hole (211) and a second connecting hole (212); the connecting plates (21) are sleeved on the connecting cross frame (22) through second connecting holes (212), each balance weight adjusting device (1) is arranged between two adjacent connecting plates (21), and moment axle center seats (151) of the two balance weight adjusting devices (1) are hinged with the first connecting holes (211) of the connecting plates (21) through hinge shafts (1'); the front bracket (23) is obliquely fixed in the middle of the connecting transverse frame (22).