CN114191773B

CN114191773B - Counterweight selection device for fitness equipment and use method thereof

Info

Publication number: CN114191773B
Application number: CN202111646782.2A
Authority: CN
Inventors: 孙建国
Original assignee: Nanjing Yuedu Health Technology Co ltd
Current assignee: Nanjing Yuedu Health Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-11-11
Anticipated expiration: 2041-12-29
Also published as: CN114191773A

Abstract

The invention discloses a counterweight selection device for fitness equipment and a use method thereof. According to the invention, the support plate is arranged to support the threaded rod, the movable plate is arranged to drive the connecting column and the limiting plate to move up and down when the threaded rod rotates in a matching manner, the counterweight and the communicating groove are matched to adjust the height of the connecting column and the limiting plate in the inner cavity of the communicating groove, and the limiting groove is arranged to enable one end of the fixing rod to penetrate through the communicating groove and extend to the inner cavity of the fixing groove, so that the adjustment of the number of the counterweight is completed, and then the adjustment of the weight of the counterweight of the external fitness equipment is completed.

Description

Counterweight selection device for fitness equipment and use method thereof

Technical Field

The invention relates to the technical field of fitness equipment, in particular to a counterweight selection device for fitness equipment and a using method thereof.

Background

The fitness is a sports item, such as various bare-handed aerobics exercises, rhythm exercises, body exercises and various self-resistance actions, gymnastics and yoga, which can enhance strength and flexibility, increase endurance, improve coordination and control the ability of each part of the body, thereby making the body strong, if the aim of relieving pressure is to be achieved, at least one week exercises for 3 times, the fitness equipment is usually divided into two categories of single function and comprehensive multifunctional according to the number of training functions, commonly used are rowing equipment, aerobics car, walking machine, running machine, waist beautifying machine and the like, the fitness equipment is usually divided into two categories of single function and comprehensive multifunctional according to the number of training functions, single function equipment, commonly used are rowing equipment, aerobics, walking machine, running machine, waist beautifying machine and the like, and the main functions of the fitness equipment are as follows: increasing arm strength: the multi-functional sit up board of dumbbell spring-grip.

Present body-building equipment can be fine completion user to the demand of body-building, but partial body-building apparatus pushes away the shoulder ware and is not convenient for carry out quick regulation to the weight of balancing weight at the in-process that uses like sitting, and its step is loaded down with trivial details and take trouble hard, has wasted the more time of user, has lead to user's body-building efficiency to descend, has reduced body-building apparatus's availability factor simultaneously.

Disclosure of Invention

The invention aims to provide a counterweight selection device for fitness equipment and a use method thereof, which have the advantage of convenience in adjustment, and solve the problems that the existing fitness equipment can well meet the requirement of a user on fitness, but part of fitness equipment such as a sitting type shoulder pushing device is inconvenient to quickly adjust the weight of a counterweight in the use process, the steps are complicated, the trouble and the labor are wasted, more time of the user is wasted, the fitness efficiency of the user is reduced, and the use efficiency of the fitness equipment is reduced.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a counter weight selection device for body-building equipment, includes adjustment mechanism and counter weight mechanism, adjustment mechanism includes the alignment frame, the bottom swing joint of alignment frame inner chamber has the backup pad, the both sides at backup pad top all have the threaded rod through bearing swing joint, the surface threaded connection of threaded rod has the fly leaf, the front end and the equal fixedly connected with spliced pole in rear end of fly leaf bottom, counter weight mechanism includes the counter weight frame, the top of counter weight frame and alignment frame's bottom fixed connection, the bottom of spliced pole runs through to the inner chamber of counter weight frame, the spliced pole is located the surface of counter weight frame inner chamber one end and has seted up the fixed slot, and the equal fixedly connected with limiting plate in bottom of two spliced poles, the bottom fixedly connected with buffering frame of counter weight frame inner chamber, the top swing joint of buffering frame has the counter weight, the spacing groove has been seted up in the front of counter weight, the center department at counter weight top has seted up the intercommunication groove, the movable groove has been seted up in the front of counter weight frame, the inner chamber swing joint of spacing groove has the dead lever.

Preferably, the bottoms of the connecting column and the limiting plate extend to the inner cavity of the communicating groove, and one end, close to the counterweight, of the fixing rod penetrates through the limiting groove and the communicating groove and extends to the inner cavity of the fixing groove.

Preferably, a power frame is arranged at the top of the threaded rod, pull ropes are arranged on two sides of the top of the power frame, and the top of each pull rope penetrates through the outside of the adjusting frame.

Preferably, the center of the bottom of the inner cavity of the power frame is fixedly connected with a servo motor, an output shaft of the servo motor is fixedly connected with a driving wheel, the top of the threaded rod penetrates through the inner cavity of the power frame and is fixedly connected with a driven wheel, and the driving wheel is meshed with the driven wheel.

Preferably, first chutes are formed in the periphery of the inner cavity of the adjusting frame, first sliding blocks are connected to the upper end and the lower end of the inner cavity of the first chute in a sliding manner, and one ends, far away from the inner cavity of the first chute, of the two first sliding blocks are fixedly connected with one side of the supporting plate and one side of the power frame respectively.

Preferably, the right side of the power frame is provided with a heat dissipation groove, and the periphery of the heat dissipation groove is fixedly connected with a heat dissipation net.

Preferably, the two sides of the inner cavity of the counterweight frame are fixedly connected with limiting blocks, and the bottoms of the limiting blocks are fixedly connected with the buffer frame.

Preferably, all fixedly connected with buffer spring around buffer frame inner chamber bottom, buffer spring's top fixedly connected with buffer board, and buffer board and buffer frame's inner chamber swing joint, the top and the counterweight swing joint of buffer board.

Preferably, second sliding grooves are formed in the periphery of the inner cavity of the buffer frame, a second sliding block is connected to the inner cavity of the second sliding grooves in a sliding mode, and one end, far away from the inner cavity of the second sliding groove, of the second sliding block is fixedly connected with the buffer plate.

Preferably, the using method comprises the following steps:

A. firstly, a user can pull a pull rope through external fitness equipment, the pull rope drives a power frame, a threaded rod, a movable plate, a supporting plate, a connecting column and a limiting plate to move upwards, the limiting plate and the connecting column are matched with a fixing groove and a fixing rod to drive a counterweight to move upwards, and a first sliding block is driven to move upwards along an inner cavity of a first sliding groove in the process of moving the supporting plate and the power frame, so that the displacement of the power frame and the supporting plate is limited, and the displacement of the counterweight by the fitness equipment is completed;

B. then, when a user uses external fitness equipment to release pulling of the pull rope, the counterweight drives the fixed rod, the limiting plate, the connecting column, the supporting plate, the threaded rod, the power frame and the pull rope to move downwards under the action of gravity, the first sliding block is driven to move along the inner cavity of the first sliding groove in the process that the supporting plate and the power frame move downwards, when the counterweight moves to the top of the buffering plate under the action of self gravity, the buffering spring is extruded, meanwhile, the buffering operation is performed on the buffering plate and the counterweight through the resetting elasticity of the buffering spring, and when the buffering plate moves in the inner cavity of the buffering frame, the second sliding block is driven to move along the inner cavity of the second sliding groove, so that the buffering operation on the counterweight is completed;

C. finally, if the weight of the device counterweight needs to be adjusted, the user can pull the dead lever, the dead lever is removed from being matched with the limiting groove, the communicating groove and the fixing groove limit the limiting plate, then the servo motor is started through the external controller, the output shaft of the servo motor drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate with the threaded rod, the threaded rod drives the movable plate to displace, the movable plate drives the connecting column and the limiting plate to displace, so that the heights of the limiting plate and the connecting column are adjusted, when the limiting plate and the connecting column are at proper heights, the dead lever passes through the movable groove, the limiting groove and the communicating groove extend to the inner cavity of the fixing groove, the adjustment of the number of the counterweight is completed through matching with the limiting plate, and the adjustment of the weight of the device counterweight is completed.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the supporting plate is arranged to support the threaded rod, the movable plate is arranged to drive the connecting column and the limiting plate to move up and down when the threaded rod rotates, the counterweight and the communicating groove are matched to adjust the heights of the connecting column and the limiting plate in the inner cavity of the communicating groove, and the limiting groove is arranged to enable one end of the fixing rod to penetrate through the communicating groove and extend to the inner cavity of the fixing groove, so that the adjustment of the number of the counterweight is completed, and then the adjustment of the weight of the counterweight of the external fitness equipment is completed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of an adjustment frame of the present invention;

FIG. 3 is a schematic perspective view of the power frame of the present invention;

FIG. 4 is a cross-sectional structural schematic of the power frame of the present invention;

FIG. 5 is a schematic cross-sectional view of a counterweight frame according to the present invention;

fig. 6 is an exploded view of the cushioning frame of the present invention.

In the figure: 100. an adjustment mechanism; 101. an adjustment frame; 102. a support plate; 103. a threaded rod; 104. a movable plate; 105. connecting columns; 106. fixing grooves; 107. a limiting plate; 108. a power frame; 109. pulling a rope; 110. a servo motor; 111. a driving wheel; 112. a driven wheel; 113. a first chute; 114. a first slider; 115. a heat-dissipating web; 200. a counterweight mechanism; 201. a counterweight frame; 202. a buffer frame; 203. a counterweight; 204. a limiting groove; 205. a communicating groove; 206. a movable groove; 207. fixing the rod; 208. a limiting block; 209. a buffer spring; 210. a buffer plate; 211. a second chute; 212. and a second slider.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The adjusting mechanism 100, the adjusting frame 101, the supporting plate 102, the threaded rod 103, the movable plate 104, the connecting column 105, the fixing groove 106, the limiting plate 107, the power frame 108, the pull rope 109, the servo motor 110, the driving wheel 111, the driven wheel 112, the first sliding chute 113, the first sliding block 114, the heat dissipation net 115, the counterweight mechanism 200, the counterweight frame 201, the buffer frame 202, the counterweight 203, the limiting groove 204, the communicating groove 205, the movable groove 206, the fixed rod 207, the limiting block 208, the buffer spring 209, the buffer plate 210, the second sliding chute 211 and the second sliding block 212 are all common standard components or components known by those skilled in the art, and the structure and principle thereof can be known by technical manuals or by conventional experimental methods.

Referring to fig. 1-6, a counterweight selecting device for fitness equipment comprises an adjusting mechanism 100 and a counterweight mechanism 200, wherein the adjusting mechanism 100 comprises an adjusting frame 101, the bottom of the inner cavity of the adjusting frame 101 is movably connected with a supporting plate 102, both sides of the top of the supporting plate 102 are movably connected with a threaded rod 103 through bearings, the surface of the threaded rod 103 is in threaded connection with a movable plate 104, the front end and the rear end of the bottom of the movable plate 104 are fixedly connected with a connecting column 105, the counterweight mechanism 200 comprises a counterweight frame 201, the top of the counterweight frame 201 is fixedly connected with the bottom of the adjusting frame 101, the bottom of the connecting column 105 penetrates through the inner cavity of the counterweight frame 201, the surface of the connecting column 105 at one end of the inner cavity of the counterweight frame 201 is provided with a fixing groove 106, the bottoms of the two connecting columns 105 are fixedly connected with a limiting plate 107, the bottom of the inner cavity of the counterweight frame 201 is fixedly connected with a buffer frame 202, and the top of the buffer frame 202 is movably connected with a counterweight 203, the front surface of the counterweight 203 is provided with a limit groove 204, the center of the top of the counterweight 203 is provided with a communicating groove 205, the front surface of the counterweight frame 201 is provided with a movable groove 206, the inner cavity of the limit groove 204 is movably connected with a fixed rod 207, the threaded rod 103 is supported by arranging a support plate 102, the threaded rod 103 is matched with the movable plate 104 to drive the connecting column 105 and the limit plate 107 to move up and down when the threaded rod 103 rotates, the counterweight 203 and the communicating groove 205 are matched to adjust the height of the connecting column 105 and the limit plate 107 in the inner cavity of the communicating groove 205, one end of the fixed rod 207 can penetrate through the communicating groove 205 and extend to the inner cavity of the fixed groove 106 by arranging the limit groove 204, so that the adjustment of the number of the counterweights 203 is completed, the adjustment of the weight of the counterweight 203 of the external fitness equipment is completed, and the requirement of a user on fitness by the current fitness equipment can be well completed, but some fitness equipment such as sitting posture shoulder pushing device is not convenient for carry out quick regulation to the weight of balancing weight in the in-process of using, and its step is loaded down with trivial details and takes trouble and laboursome, has wasted more time of user, has lead to user's body-building efficiency to descend, has reduced the problem of fitness equipment's availability factor simultaneously.

Specifically, the bottoms of the connecting column 105 and the limiting plate 107 extend to the inner cavity of the communicating groove 205, and one end of the fixing rod 207 close to the counterweight 203 penetrates through the limiting groove 204 and the communicating groove 205 and extends to the inner cavity of the fixing groove 106.

Specifically, the top of threaded rod 103 is provided with power frame 108, and the both sides at power frame 108 top all are provided with stay cord 109, and the outside to adjusting frame 101 is run through to the top of stay cord 109, through setting up power frame 108 to this protects the device of power frame 108 inner chamber, through setting up stay cord 109, cooperates outside body-building equipment to pull counter weight 203 and carries out the displacement.

Specifically, the center of the bottom of the inner cavity of the power frame 108 is fixedly connected with a servo motor 110, an output shaft of the servo motor 110 is fixedly connected with a driving wheel 111, the top of the threaded rod 103 penetrates through the inner cavity of the power frame 108 and is fixedly connected with a driven wheel 112, the driving wheel 111 is meshed with the driven wheel 112, and the servo motor 110, the driving wheel 111 and the driven wheel 112 are arranged to provide a power source for rotation of the threaded rod 103.

Specifically, all seted up first spout 113 around the adjusting frame 101 inner chamber, the equal sliding connection of upper end and the lower extreme of first spout 113 inner chamber has first slider 114, and two first sliders 114 keep away from the one end of first spout 113 inner chamber respectively with one side of backup pad 102 and one side fixed connection of power frame 108, through setting up first spout 113 and first slider 114, carry on spacingly to this displacement to backup pad 102 and power frame 108, avoid the in-process of backup pad 102 and power frame 108 displacement to appear the off normal.

Specifically, the heat dissipation groove has been seted up on power frame 108's right side, and all fixedly connected with radiator-grid 115 all around of heat dissipation groove, through setting up radiator-grid 115, the cooperation heat dissipation groove carries out the heat dissipation operation to power frame 108's inner chamber.

Specifically, the two sides of the inner cavity of the counterweight frame 201 are fixedly connected with the limiting blocks 208, the bottoms of the limiting blocks 208 are fixedly connected with the buffer frame 202, and the limiting blocks 208 are arranged, so that the displacement of the counterweight 203 is continuously limited, and the counterweight 203 is prevented from being deviated in the displacement process to cause device failure.

Specifically, all fixedly connected with buffer spring 209 around buffer frame 202 inner chamber bottom, buffer spring 209's top fixedly connected with buffer board 210, and buffer board 210 and buffer frame 202's inner chamber swing joint, buffer board 210's top and counterweight 203 swing joint through setting up buffer spring 209 and buffer board 210 to this cushions the operation to counterweight 203, avoids counterweight 203's gravity to cause vibrations and damage to the device.

Specifically, the second sliding groove 211 has all been seted up around the buffer frame 202 inner chamber, and the inner chamber sliding connection of second sliding groove 211 has second slider 212, and the one end and the buffer board 210 fixed connection of second sliding groove 211 inner chamber are kept away from to second slider 212, through setting up second sliding groove 211 and second slider 212 to this carries out further spacing to buffer board 210's displacement, avoids buffer board 210 to appear the off normal under the action of gravity of counter weight 203.

Specifically, the using method comprises the following steps:

A. firstly, a user can pull the pull rope 109 through the external fitness equipment, the pull rope 109 drives the power frame 108, the threaded rod 103, the movable plate 104, the support plate 102, the connecting column 105 and the limiting plate 107 to move upwards, meanwhile, the limiting plate 107 and the connecting column 105 are matched with the fixing groove 106 and the fixing rod 207 to drive the counterweight 203 to move upwards, and in the process of moving the support plate 102 and the power frame 108, the first sliding block 114 is driven to move upwards along the inner cavity of the first sliding groove 113, so that the displacement of the power frame 108 and the support plate 102 is limited, and the displacement of the fitness equipment on the counterweight 203 is completed;

B. then, when the user releases the pulling of the pulling rope 109 by using the external fitness equipment, the counterweight 203 drives the fixing rod 207, the limiting plate 107, the connecting column 105, the supporting plate 102, the threaded rod 103, the power frame 108 and the pulling rope 109 to move downwards under the action of gravity, the first sliding block 114 is driven to move along the inner cavity of the first sliding groove 113 in the process that the supporting plate 102 and the power frame 108 move downwards, when the counterweight 203 moves to the top of the buffer plate 210 under the action of self gravity, the buffer spring 209 is extruded, meanwhile, the buffer plate 210 and the counterweight 203 are buffered by the reset elasticity of the buffer spring 209, and when the buffer plate 210 moves in the inner cavity of the buffer frame 202, the second sliding block 212 is driven to move along the inner cavity of the second sliding groove 211, so that the buffering operation of the counterweight 203 is completed;

C. finally, if the weight of the device counterweight needs to be adjusted, a user can pull the fixing rod 207, the fixing of the fixing rod 207 by the limiting groove 204, the communicating groove 205 and the fixing groove 106 on the limiting plate 107 is released, then the servo motor 110 is started through an external controller, the output shaft of the servo motor 110 drives the driving wheel 111 to rotate, the driving wheel 111 drives the driven wheel 112 and the threaded rod 103 to rotate, the threaded rod 103 drives the movable plate 104 to displace, the movable plate 104 drives the connecting column 105 and the limiting plate 107 to displace, so that the heights of the limiting plate 107 and the connecting column 105 are adjusted, when the limiting plate 107 and the connecting column 105 are at proper heights, the fixing rod 207 extends to the inner cavity of the fixing groove 106 through the movable groove 206, the limiting groove 204 and the communicating groove 205, the amount of the counterweight 203 is adjusted by matching with the limiting plate 107, and the adjustment of the weight of the device is completed.

The standard parts used in the present application document can be purchased from the market, and can be customized according to the description of the specification and the description of the attached drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets, welding and the like, the machinery, parts and equipment adopt the conventional type in the prior art, the control mode is automatically controlled by a controller, the control circuit of the controller can be realized by simple programming of technicians in the field, and the present application belongs to the common knowledge in the field, and is mainly used for protecting mechanical devices, so the control mode and the circuit connection are not explained in detail in the present application.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A weight selection device for fitness equipment comprises an adjusting mechanism (100) and a weight mechanism (200), and is characterized in that: the adjusting mechanism (100) comprises an adjusting frame (101), the bottom of the inner cavity of the adjusting frame (101) is movably connected with a supporting plate (102), both sides of the top of the supporting plate (102) are movably connected with threaded rods (103) through bearings, the surface of the threaded rod (103) is in threaded connection with a movable plate (104), the front end and the rear end of the bottom of the movable plate (104) are both fixedly connected with a connecting column (105), the counterweight mechanism (200) comprises a counterweight frame (201), the top of the counterweight frame (201) is fixedly connected with the bottom of the adjusting frame (101), the bottom of the connecting column (105) penetrates into the inner cavity of the counterweight frame (201), the surface of one end of the connecting column (105) positioned in the inner cavity of the counterweight frame (201) is provided with a fixing groove (106), and the bottoms of the two connecting columns (105) are both fixedly connected with a limiting plate (107), the bottom of the inner cavity of the counterweight frame (201) is fixedly connected with a buffer frame (202), the top of the buffer frame (202) is movably connected with a counterweight (203), the front surface of the counterweight (203) is provided with a limit groove (204), the center of the top of the counterweight (203) is provided with a communicating groove (205), the front surface of the counterweight frame (201) is provided with a movable groove (206), the inner cavity of the limiting groove (204) is movably connected with a fixing rod (207).

2. The weight selecting device for exercise equipment according to claim 1, wherein: the bottoms of the connecting column (105) and the limiting plate (107) both extend to the inner cavity of the communicating groove (205), and one end, close to the counterweight (203), of the fixing rod (207) penetrates through the inner cavity of the limiting groove (204) and the communicating groove (205) and extends to the inner cavity of the fixing groove (106).

3. The weight selection device for exercise equipment of claim 1, wherein: the top of the threaded rod (103) is provided with a power frame (108), pull ropes (109) are arranged on two sides of the top of the power frame (108), and the top of each pull rope (109) penetrates through the outside of the adjusting frame (101).

4. A weight selection device for exercise apparatus according to claim 3, wherein: the power frame is characterized in that a servo motor (110) is fixedly connected to the center of the bottom of the inner cavity of the power frame (108), an output shaft of the servo motor (110) is fixedly connected with a driving wheel (111), the top of the threaded rod (103) penetrates through the inner cavity of the power frame (108), a driven wheel (112) is fixedly connected with the top of the threaded rod, and the driving wheel (111) is meshed with the driven wheel (112).

5. The weight selection device for exercise equipment of claim 1, wherein: all seted up first spout (113) around adjusting frame (101) inner chamber, the equal sliding connection of upper end and the lower extreme in first spout (113) inner chamber has first slider (114), and the one end that first spout (113) inner chamber was kept away from in two first sliders (114) respectively with one side of backup pad (102) and one side fixed connection of power frame (108).

6. A weight selection device for exercise equipment according to claim 3, wherein: the right side of the power frame (108) is provided with a heat dissipation groove, and the periphery of the heat dissipation groove is fixedly connected with a heat dissipation net (115).

7. The weight selection device for exercise equipment of claim 1, wherein: both sides of the inner cavity of the counterweight frame (201) are fixedly connected with limiting blocks (208), and the bottoms of the limiting blocks (208) are fixedly connected with the buffer frame (202).

8. The weight selecting device for exercise equipment according to claim 1, wherein: all fixedly connected with buffer spring (209) all around of buffer frame (202) inner chamber bottom, the top fixedly connected with buffer board (210) of buffer spring (209), and the inner chamber swing joint of buffer board (210) and buffer frame (202), the top and the counter weight thing (203) swing joint of buffer board (210).

9. The weight selection device for exercise equipment of claim 8, wherein: second sliding grooves (211) are formed in the periphery of the inner cavity of the buffer frame (202), second sliding blocks (212) are connected to the inner cavity of the second sliding grooves (211) in a sliding mode, and one ends, far away from the inner cavity of the second sliding grooves (211), of the second sliding blocks (212) are fixedly connected with the buffer plate (210).

10. Use of a weight selection device for an exercise apparatus according to any of claims 1 to 9, wherein: the using method comprises the following steps:

A. firstly, a user can pull a pull rope (109) through external fitness equipment, the pull rope (109) drives a power frame (108), a threaded rod (103), a movable plate (104), a support plate (102), a connecting column (105) and a limiting plate (107) to move upwards, meanwhile, the limiting plate (107) and the connecting column (105) are matched with a fixing groove (106), and a fixing rod (207) drives a counterweight (203) to move upwards, and in the process of moving the support plate (102) and the power frame (108), a first sliding block (114) is driven to move upwards along an inner cavity of a first sliding groove (113), so that the power frame (108) and the support plate (102) are limited in displacement, and the displacement of the fitness equipment on the counterweight (203) is completed;

B. then, when a user releases the pulling of the pull rope (109) by using external fitness equipment, the counterweight (203) drives the fixed rod (207), the limiting plate (107), the connecting column (105), the supporting plate (102), the threaded rod (103), the power frame (108) and the pull rope (109) to move downwards under the action of gravity, the supporting plate (102) and the power frame (108) drive the first sliding block (114) to move along the inner cavity of the first sliding groove (113) in the downward movement process, when the counterweight (203) moves to the top of the buffering plate (210) under the action of self gravity, the buffering spring (209) is extruded, meanwhile, the resetting elasticity of the buffering spring (209) buffers the buffering plate (210) and the counterweight (203), and when the buffering plate (210) moves in the inner cavity of the buffering frame (202), the second sliding block (212) is driven to move along the inner cavity of the second sliding groove (211), so that the buffering operation of the counterweight (203) is completed;

C. finally, if the weight of the device counterweight needs to be adjusted, a user can pull the fixing rod (207), the fixing rod (207) is released to be matched with the limiting groove (204), the communicating groove (205) and the fixing groove (106) to limit the limiting plate (107), then the servo motor (110) is started through an external controller, an output shaft of the servo motor (110) drives the driving wheel (111) to rotate, the driving wheel (111) drives the driven wheel (112) and the threaded rod (103) to rotate, the threaded rod (103) drives the movable plate (104) to displace, the movable plate (104) drives the connecting column (105) and the limiting plate (107) to displace, so that the heights of the limiting plate (107) and the connecting column (105) are adjusted, when the limiting plate (107) and the connecting column (105) are at proper heights, the fixing rod (207) extends to an inner cavity of the fixing groove (106) through the movable groove (206), the limiting groove (204) and the communicating groove (205), the amount of the counterweight (203) is adjusted through being matched with the limiting plate (107), so that the weight of the device is adjusted.