Fitness equipment weight adjustment mechanism

Abstract

This invention provides a weight adjustment mechanism for fitness equipment, including a main frame, a weight assembly, a chain positioning assembly, an adjustment cable assembly, a lifting cable assembly, and a positioning assembly. The weight assembly includes multiple stacked weight blocks and has a vertically penetrating positioning groove. The chain positioning assembly passes through the positioning groove and includes an adjustment end and a lifting end. In the initial position, the chain positioning assembly is engaged with the weight assembly. One end of the adjustment cable assembly is connected to the adjustment end. One end of the lifting cable assembly is connected to the lifting end, and the other end is connected to the moving end of the fitness equipment. The positioning assembly is mounted on the main frame and connected to the other end of the adjustment cable assembly. The positioning assembly is used to fix the adjustment cable assembly. When the user pulls the adjustment cable assembly, the chain near the adjustment end of the chain positioning assembly disengages from part of the weight block. After the positioning assembly is positioned, the user pulls the moving end, which drives the weight block engaged with the chain positioning assembly through the lifting end for training.

Description

Technical Field

[0001] This invention relates to the field of fitness equipment, and more specifically, to a weight adjustment mechanism for fitness equipment. Background Technology

[0002] Existing indoor and outdoor fitness equipment typically requires manual adjustment of the weights by manually inserting and removing pins on the weights. This necessitates placing the weight adjustment mechanism within easy reach of the user during training, which limits the design and layout of the equipment. If this is not possible, the user must leave the training area to select the weight and then return to the original position, which is inconvenient, affects training efficiency, and reduces the user's interest in exercising.

[0003] Therefore, there is an urgent need to develop a weight adjustment mechanism for fitness equipment that overcomes the above-mentioned defects. Summary of the Invention

[0004] This invention provides a weight adjustment mechanism for fitness equipment, solving the problems of low efficiency and cumbersome operation in existing indoor and outdoor fitness equipment, which requires users to leave their training position to adjust the weights. With this weight adjustment mechanism, the adjustment can be remotely controlled. Furthermore, because the position of the weight adjustment mechanism is not limited by the user's reach, it facilitates the combined use of various strength training equipment.

[0005] To achieve the above objectives, the present invention provides a weight adjustment mechanism for fitness equipment, comprising:

[0006] Main frame;

[0007] The counterweight assembly includes multiple counterweight blocks stacked vertically, and the counterweight assembly has a vertically penetrating positioning groove.

[0008] A chain positioning component is inserted into the positioning groove. The chain positioning component includes an adjustment end and a lifting end. In the initial position, the chain positioning component is engaged with the counterweight component.

[0009] An adjusting cable assembly, one end of which is connected to the adjusting end;

[0010] The lifting cable assembly has one end connected to the lifting end and the other end connected to the moving end of the fitness equipment;

[0011] A positioning component is disposed on the main frame and connected to the other end of the adjusting steel cable assembly. The positioning component is used to fix the adjusting steel cable assembly.

[0012] In this process, the user pulls the adjusting cable assembly, causing the chain near the adjusting end of the chain positioning assembly to disengage from part of the counterweight. After the positioning assembly is positioned, the user pulls the actuating end, which drives the counterweight engaged with the chain positioning assembly through the lifting end for training.

[0013] Furthermore, the outer side of the chain positioning assembly is provided with a plurality of U-shaped positioning screw slots, and the positioning slot of the counterweight is provided with positioning screws corresponding to the U-shaped positioning screw slots;

[0014] In the initial position, the positioning screw is engaged with the U-shaped positioning screw groove; by pulling the adjusting end, the positioning screw disengages from the U-shaped positioning screw groove.

[0015] Furthermore, the positioning groove is opened from the center of the counterweight towards the long side of the counterweight, and the positioning screw is disposed on the side wall of the positioning groove located at the center of the counterweight.

[0016] Furthermore, the counterweight assembly also includes:

[0017] A limiting plate is disposed on the side surface of the counterweight to make the positioning groove form a sealing groove. The positioning screw is disposed opposite to the limiting plate, and the chain of the chain positioning assembly is U-shaped and confined within the sealing groove.

[0018] Furthermore, the chain positioning component also includes:

[0019] The connecting rod passes vertically through the positioning groove;

[0020] A sprocket is located at the bottom end of the connecting rod;

[0021] A chain, wound around the sprocket and moving along the connecting rod;

[0022] Multiple U-shaped cover plates are evenly arranged on the outside of the chain, and each U-shaped cover plate is provided with a U-shaped positioning screw groove.

[0023] Furthermore, the weight adjustment mechanism of the fitness equipment also includes a connecting component, which includes:

[0024] The main connecting body is located at the top of the connecting rod, and the counterweight guide rod of the counterweight assembly passes through the main connecting body;

[0025] A center-of-gravity counterweight is disposed on the upper surface of the main connecting body;

[0026] The center-of-gravity counterweight and the connecting rod are arranged opposite each other to keep the center of gravity of the chain positioning assembly stable during movement.

[0027] Furthermore, the positioning component includes:

[0028] An adjusting steel cable winding reel, wherein the other end of the adjusting steel cable assembly can be wound on the adjusting steel cable winding reel;

[0029] A handle is provided on the adjusting steel cable winding disc;

[0030] A positioning pin is connected to the handle;

[0031] A positioning disc is located on the back of the adjusting steel cable winding disc, and multiple positioning holes are evenly distributed on it. When the handle is rotated, the adjusting steel cable assembly is wound around the adjusting steel cable winding disc. Pulling the handle can drive the positioning pin to be inserted into the selected positioning hole.

[0032] Furthermore, the weight adjustment mechanism of the fitness equipment also includes a limiting component, said limiting component comprising:

[0033] A support device is mounted on the main frame;

[0034] A connecting terminal assembly is disposed on the lifting cable assembly;

[0035] In the initial position, the support device is sleeved with the connecting terminal assembly so that the positioning chain assembly and the counterweight assembly can be effectively engaged during training.

[0036] Furthermore, the support device includes:

[0037] A positioning welded pipe, one end of which is mounted on the main frame;

[0038] A positioning threaded sleeve is disposed at the other end of the positioning welded pipe, and the connecting terminal assembly includes an adjusting through-hole bolt, which passes through the positioning threaded sleeve.

[0039] Furthermore, the present invention provides a fitness equipment, including the aforementioned fitness equipment weight adjustment mechanism.

[0040] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The present invention provides a weight adjustment mechanism for fitness equipment. By utilizing the cooperation between the steel cable assembly, the chain positioning assembly, and the weight assembly, the user can remotely adjust the weight without direct manual operation. The operation is simple and improves the efficiency of weight selection. At the same time, the cooperation structure between the chain positioning assembly and the weight assembly is simple, stable, and reliable, which is conducive to mass production. Furthermore, the weight adjustment mechanism for fitness equipment provided by the present invention can avoid direct insertion and removal of pins, ensuring safety and reliability without hidden dangers. Since the layout of the weight adjustment mechanism is not limited to a position accessible to the human hand, it is beneficial for the layout and combination of various strength training equipment. In addition, since the main components of the weight adjustment mechanism are all placed in a sealed cover, they are in a completely sealed state, making it suitable for outdoor use. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the weight adjustment mechanism of the fitness equipment of the present invention with the weight sealing protective cover removed;

[0042] Figure 2 This is a schematic diagram of the structure of the weight adjustment mechanism of the fitness equipment of the present invention with the weight sealed protective cover not removed;

[0043] Figure 3 This is a schematic diagram of the counterweight component structure of the present invention;

[0044] Figure 4 This is a schematic diagram of the chain positioning component structure of the present invention;

[0045] Figure 5 This is a schematic diagram of the connection component structure of the present invention;

[0046] Figure 6 for Figure 1 Enlarged view of a section at point I;

[0047] Figure 7 for Figure 2 Enlarged view of section II in the middle;

[0048] Figure 8 This is a dynamic schematic diagram of the weight selection of the weight adjustment mechanism of the fitness equipment of the present invention;

[0049] Figure 9 This is a schematic diagram of the dynamic lifting of the counterweight adjustment mechanism of the fitness equipment of the present invention.

[0050] Figure 10 This is a schematic diagram of the connection terminal assembly structure of the present invention;

[0051] Figure 11 This is a schematic diagram of the adjustable steel cable assembly structure of the present invention;

[0052] Figure 12 This is a schematic diagram of the lifting cable assembly structure of the present invention.

[0053] In the above image:

[0054] 1. Main frame; 100. Counterweight guide rod; 110. Pull-up training support rod; 120. Rowing training support rod; 2. Counterweight assembly; 21. Counterweight block; 22. Limiting plate; 23. Positioning screw; 3. Chain positioning assembly; 31. Connecting rod; 32. Sprocket; 33. Chain; 34. U-shaped cover plate; 35. Adjusting end connecting seat; 36. Lifting end connecting seat; 37. Cover plate connector; 4. Adjusting cable assembly; 41. Adjusting cable; 42. Adjusting cable winding terminal; 43. Adjusting cable lower terminal; 5. Lifting cable assembly; 51. Lifting cable; 52. Pull handle connector; 53. Lifting cable lower terminal; 6. Positioning assembly; 61. Adjusting cable winding disc; 62. Handle; 63. Positioning pin; 64. Positioning disc; 7. Connecting assembly; 71. 72. Main connecting body; 73. Center of gravity correction counterweight; 8. Hanging rod guide sleeve; 8. Limiting component; 81. Support device; 811. Positioning welded pipe; 812. Positioning threaded sleeve; 82. Connecting terminal assembly; 821. Connecting terminal; 822. Adjusting through bolt; 823. Locking nut; 824. Anti-loosening screw; 9. Counterweight sealing protective sleeve; 10. Adjusting steel cable guide wheel assembly; 11. Lifting steel cable guide wheel assembly; 12. Moving pulley assembly; 13. Rowing steel cable assembly; 14. Rowing steel cable guide wheel assembly; 15. Rowing training handle; 16. Pulling training handle; 17. Positioning steel cable assembly; 171. Positioning steel cable; 172. Positioning steel cable upper terminal; 173. Positioning steel cable lower terminal; A. Positioning groove; B. Positioning hole; C. U-shaped positioning screw groove; D. Counterweight block guide hole. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0058] like Figures 1 to 12 As shown, the present invention provides a weight adjustment mechanism for fitness equipment, which is used to remotely adjust the weight blocks to facilitate training with various strength training equipment.

[0059] This invention provides a weight adjustment mechanism for fitness equipment, including a main frame 1, a weight assembly 2, a chain positioning assembly 3, an adjusting cable assembly 4, a lifting cable assembly 5, and a positioning assembly 6. The main frame 1 is equipped with a resistance training support rod 110 and a rowing training support rod 120, and also has a weight block guide rod 100. The weight assembly 2 includes multiple stacked weight blocks 21, and has a vertically penetrating positioning groove A. The chain positioning assembly 3 passes through the positioning groove A and includes an adjusting end and a lifting end. In its initial position, the chain positioning assembly 3... The counterweight assembly 2 is engaged with the counterweight assembly 4; one end of the adjusting cable assembly 4 is connected to the adjusting end; one end of the lifting cable assembly 5 is connected to the lifting end, and the other end is connected to the moving end of the fitness equipment; the positioning assembly 6 is set on the main frame 1 and connected to the other end of the adjusting cable assembly 4. The positioning assembly 6 is used to fix the adjusting cable assembly 4; wherein, when the user pulls the adjusting cable assembly 4, the chain of the chain positioning assembly 3 near the adjusting end is disengaged from part of the counterweight 21. After the positioning assembly 6 is positioned, the user pulls the moving end, which drives the counterweight 21 engaged with the chain positioning assembly 3 through the lifting end for training.

[0060] Understandably, the motion end can be the handles for users to train with fitness equipment, such as pull handles or rowing handles.

[0061] Figure 3 This is a schematic diagram of the counterweight component structure of the present invention, which is described below in conjunction with... Figure 3 The specific structure of the counterweight component 2 in this invention will be described in detail.

[0062] like Figure 3 As shown, the counterweight assembly 2 includes a counterweight block 21, a limiting plate 22, and a positioning screw 23. The counterweight block 21 has a counterweight block guide hole D, and the counterweight block guide rod 100 passes through the counterweight block guide hole D to ensure that the counterweight assembly 2 is stably raised or lowered along the counterweight block guide rod 100 according to a preset trajectory. The counterweight block 21 has a vertically penetrating positioning groove A. The limiting plate 22 is set on the side surface of the counterweight block 21 so that the positioning groove A forms a sealed through groove. The positioning screw 23 is set opposite to the limiting plate 22. The chain of the chain positioning assembly 3 is U-shaped and confined in the sealed through groove, which is conducive to the quick engagement or disengagement of the chain positioning assembly 3 and the counterweight assembly 2, and avoids the chain positioning assembly 3 from engaging or disengaging without following the preset trajectory.

[0063] Understandably, the positioning groove A is opened from the center of the counterweight 21 toward its long side, and the positioning screw 23 is located on the side wall of the positioning groove A at the center of the counterweight. In this way, the chain positioning assembly 3 can be engaged with the center of the counterweight 21, which helps to improve the stability of the counterweight adjustment mechanism during use.

[0064] Figure 4 This is a schematic diagram of the chain positioning component structure of the present invention. The following is in conjunction with... Figure 4 The specific structure of the chain positioning component 3 in this invention will be described in detail.

[0065] The chain positioning assembly 3 includes a connecting rod 31, a sprocket 32, a chain 33, and multiple U-shaped cover plates 34. The connecting rod 31 passes vertically through the positioning groove A. The sprocket 32 ​​is mounted on the bottom end of the connecting rod 31 via a connecting seat. The chain 33 is wound around the sprocket 32 ​​and moves along the connecting rod 31. Multiple U-shaped cover plates 34 are evenly distributed on the outside of the chain 33 and connected to the chain 33 via multiple cover plate connectors 37. Each U-shaped cover plate 34 is provided with a U-shaped positioning screw groove C, which can be engaged with the positioning screw 23 provided in the positioning groove A of the counterweight 21. One end of the chain positioning assembly 3 is an adjustment end, which is connected to the adjustment cable assembly 4 via an adjustment end connecting seat 35. The other end is a lifting end, which is connected to the lifting cable assembly 5 via a lifting end connecting seat 36. In the initial position, i.e., when the user has not selected a counterweight, the positioning screw 21 is engaged with the U-shaped positioning screw groove C; pulling the adjustment end disengages the positioning screw 21 from the U-shaped positioning screw groove C.

[0066] In some embodiments, the chain 33 is a double-row chain, and the sprocket meshing with it is a double-row sprocket coaxially connected. The cooperation between the double-row chain and the double-row sprocket can increase the stability of the chain drive.

[0067] Figure 5 This is a schematic diagram of the connection component of the present invention, which is described below in conjunction with... Figure 5 The specific structure of the connecting component 7 in this invention will be described in detail.

[0068] like Figure 5 As shown, the chain positioning assembly 3 is connected to a connecting assembly 7. The connecting assembly 7 includes a main connecting body 71, a center-of-gravity calibrating counterweight 72, and a hanging rod guide sleeve 73. The main connecting body 71 is located at the top of the connecting rod 31, and the hanging rod guide sleeve 73 is mounted on it. The counterweight guide rod 100 passes through the hanging rod guide sleeve 73 and is inserted into the main connecting body 71. The center-of-gravity calibrating counterweight 72 is located on the upper surface of the main connecting body 71. In some embodiments, the two block-shaped center-of-gravity calibrating counterweights 72 are symmetrically arranged with respect to the connecting rod 31 so that the center of gravity of the chain positioning assembly 3 remains stable during movement.

[0069] Figures 6-7 This is a schematic diagram of the positioning component of the present invention. The following is in conjunction with... Figures 6-7 The specific structure of the positioning component 6 in this invention will be described in detail.

[0070] like Figures 6-7 As shown, the positioning component 6 includes an adjusting steel cable winding disc 61, a handle 62, a positioning pin 63, and a positioning plate 64. The connecting end of the adjusting steel cable assembly 4 and the positioning component 6 can be wound on the adjusting steel cable winding disc 61. The handle 62 is installed on the adjusting steel cable winding disc 61, and the positioning pin 63 is connected to the handle 62. The positioning plate 64 is located on the back of the adjusting steel cable winding disc 61, and multiple positioning holes B are evenly distributed on it. When the handle 62 is rotated, the adjusting steel cable assembly 4 is wound on the adjusting steel cable winding disc 61. Pulling the handle 62 can drive the positioning pin 63 to be inserted into the selected positioning hole B. In the initial state, that is, when the user has not selected the counterweight, the positioning pin 63 is located in the initial positioning hole B. At this time, the chain positioning component 3 is in the initial position, and the positioning screws 23 of the counterweight assembly 2 are all in the initial state of being engaged with the chain positioning component 3. Pulling the handle 22 again can make the positioning pin 63 return to the initial positioning hole B, and the chain positioning component 3 returns to the initial state.

[0071] In some embodiments, the positioning holes B of the positioning disk 64 are marked with corresponding adjustment weights in sequence, and the adjusting steel cable winding disk 61 is provided with several windows so that the positioning holes B and markings on the positioning disk 64 on the back can be observed when the handle 62 is pulled out, so as to ensure the accuracy of the selection.

[0072] Figure 8This is a dynamic schematic diagram of the weight selection of the weight adjustment mechanism of the fitness equipment of the present invention. The following is in conjunction with... Figure 8 This invention provides a detailed explanation of the working principle of the weight adjustment mechanism for fitness equipment when selecting weights.

[0073] like Figure 8 As shown, in the initial state, all counterweight components 2 are engaged with the U-shaped positioning screw slots C via positioning screws 23. Rotating the positioning component 6 raises the adjusting end of the chain positioning component 3, causing the positioning screws 23 on the bottommost counterweight component 2 to disengage from the U-shaped positioning screw slots C. As the adjusting end of the chain positioning component 3 is continuously raised, more and more counterweight components 2 disengage from the U-shaped positioning screw slots C, while the remaining counterweight components 2 remain engaged with the U-shaped positioning screw slots C. That is, the user-selected counterweights become increasingly smaller. Through this process, the user completes the selection of training counterweights. When rotating the positioning component 6 lowers the adjusting end of the chain positioning component 3, the positioning screws 23 on the counterweight components 2 re-engage with the U-shaped positioning screw slots C on the chain positioning component 3. When the adjusting end of the chain positioning component 3 returns to its initial position, the counterweight components 2 also return to their initial position, and all the positioning screws 23 on the counterweight components 2 return to their engaged state with the corresponding U-shaped positioning screw slots C on the chain positioning component 3. During this process, the setting of the center-of-gravity counterweight 72 enables the chain positioning component 3 to descend along the preset trajectory, which is beneficial for the effective engagement of the U-shaped positioning screw groove C and the positioning screw 23.

[0074] Figure 9 This is a schematic diagram of the dynamic lifting of the weight in the weight adjustment mechanism of the fitness equipment of the present invention. The following is in conjunction with... Figure 9 This invention provides a detailed explanation of the working principle of the weight adjustment mechanism in fitness equipment during training.

[0075] like Figure 9 As shown, after the rotating positioning component 6 completes the selection of the counterweight component 2, the user can perform strength training through the motion end of the fitness equipment. When performing strength training, the user pulls the motion end, and the lifting end of the chain positioning component 3 is lifted through the lifting cable component 5, which drives the selected counterweight component 2 to lift. When the user releases the motion end, the counterweight component 2 returns to its position, thus achieving the training purpose.

[0076] like Figure 1As shown, the main frame 1 is further equipped with a limiting component 8, which includes a support device 81 and a connecting terminal assembly 82. The support device 81 includes a positioning welded pipe 811 and a positioning threaded sleeve 812. One end of the positioning welded pipe 811 is set on the main frame 1, and the positioning threaded sleeve 812 is snapped into the other end of the positioning welded pipe 811. The connecting terminal assembly 82 is sleeved in the positioning threaded sleeve 812 and is used to connect the lifting cable assembly 5 and the lifting end of the chain positioning assembly 3. The support device 81 is used to adjust the relative position of the U-shaped cover plate 34 and the positioning screw 23 in the initial state to ensure that the chain positioning assembly 3 and the counterweight assembly 2 are effectively engaged during training.

[0077] like Figure 1 As shown, the lifting cable assembly 5 and the chain positioning assembly 3 are further connected by a positioning cable assembly 17. The positioning cable assembly 17 includes a positioning cable 171, an upper positioning cable terminal 172, and a lower positioning cable terminal 173. The lower positioning cable terminal 173 is installed at the lower end of the positioning cable 171 and is connected to the chain positioning assembly 3 through the lifting end connecting seat 36. The upper positioning cable terminal 172 is installed at the upper end of the positioning cable 171 and passes through the connecting terminal assembly 82, and is connected to the lifting cable assembly 5 through the connecting terminal assembly 82.

[0078] Figure 10 This is a schematic diagram of the connection terminal assembly structure of the present invention. The following is in conjunction with... Figure 10 The specific structure of the connection terminal assembly 82 is described in detail.

[0079] like Figure 10 As shown, the connecting terminal assembly 82 is used to connect the lifting cable assembly 5 and the positioning cable assembly 17, and includes a connecting terminal 821, an adjusting through bolt 822, a locking nut 823, and an anti-detachment screw 824. One end of the positioning cable 17 is sequentially passed through the adjusting through bolt 822 and the connecting terminal 821, and is snapped into the connecting terminal 171 by the upper terminal 172 of the positioning cable. The locking nut 823 and the adjusting through bolt 822 cooperate to lock the connecting terminal 171. The anti-detachment screw 824 is radially passed through the connecting terminal 821 to complete the locking and fixing of the positioning cable assembly 17, ensuring that the lifting cable assembly 5 and the chain positioning assembly 3 are stably and reliably connected through the positioning cable assembly 17.

[0080] Figure 11 This is a schematic diagram of the adjustable steel cable assembly structure of the present invention. The following is in conjunction with... Figure 11 The specific structure of the adjusting steel cable assembly 4 is described in detail.

[0081] like Figure 11As shown, the adjusting cable assembly 4 includes an adjusting cable 41, an adjusting cable winding terminal 42, and an adjusting cable lower terminal 43; one end of the adjusting cable 41 is connected to the positioning assembly 6 through the adjusting cable winding terminal 42, and the other end is connected to the adjusting end connecting seat 35 of the chain positioning assembly 3 through the adjusting cable lower terminal 43.

[0082] Figure 12 This is a schematic diagram of the lifting cable assembly structure of the present invention, which is described below in conjunction with... Figure 12 The specific structure of the lifting cable assembly 5 is described in detail.

[0083] like Figure 12 As shown, the lifting cable assembly 5 includes a lifting cable 51, a tension handle connector 52, and a lower terminal 53 of the lifting cable; one end of the lifting cable 51 is connected to the connecting terminal assembly 82 through the lower terminal 53 of the lifting cable, and the other end is connected to the tension training handle of the user training action end through the tension handle connector 52.

[0084] like Figure 1 and Figure 2 As shown, the present invention further provides a fitness equipment, including the above-mentioned fitness equipment weight adjustment mechanism, and also includes a weight sealing protective sleeve 9 and a strength training device.

[0085] like Figure 2 As shown, it further includes a counterweight sealing protective cover 9, which is installed on the main frame 1. The counterweight assembly 2, chain positioning assembly 3, and adjusting steel cable assembly 4 are all installed inside the counterweight sealing protective cover 9. The bottom of the counterweight sealing protective cover 9 has an outlet, through which one end of the adjusting steel cable assembly 4 passes and bypasses the adjusting steel cable guide wheel assembly 10 to connect with the positioning assembly 6. The counterweight sealing protective cover 9 can effectively seal and protect the main structure installed inside it, and without the elongated hole of conventional protective covers, it can effectively prevent water ingress and rust hazards, as well as the risk of children getting their fingers caught, for outdoor equipment.

[0086] like Figure 1 As shown, in some embodiments, a rowing machine training device is also included. The rowing machine training device includes a movable pulley assembly 12, a rowing cable assembly 13, a rowing cable guide pulley group 14, and a rowing training handle 15. The movable pulley assembly 9 is mounted on the tension training support rod 110. One end of the rowing cable assembly 13 passes around the movable pulley assembly 12 and connects to the lifting cable assembly 5, and the other end passes around the rowing cable guide pulley group 14 mounted on the rowing training support rod 120 and connects to the rowing training handle 15. After completing the above-mentioned counterweight selection operation, the user can pull the rowing cable assembly 13 by pulling the rowing training handle 15, so that the chain positioning assembly 3 drives the counterweight assembly 2 to lift, thereby completing the strength training.

[0087] like Figure 1As shown, in some embodiments, a tension training device is also included. The lifting cable assembly 5 bypasses the lifting cable guide wheel group 11 installed on the tension training support rod and is connected to the tension training handle 16 through the high-pull handle connector. After completing the above-mentioned counterweight selection operation, the user can pull the tension training handle 16 to pull the lifting cable assembly 5 so that the chain positioning assembly 3 drives the counterweight assembly 2 to lift, thus completing the training.

[0088] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A weight adjustment mechanism for fitness equipment, characterized in that, include: Main frame; The counterweight assembly includes multiple counterweight blocks stacked vertically, and the counterweight assembly has a vertically penetrating positioning groove. A chain positioning component is inserted into the positioning groove. The chain positioning component includes an adjustment end and a lifting end. In the initial position, the chain positioning component is engaged with the counterweight component. An adjusting cable assembly, one end of which is connected to the adjusting end; The lifting cable assembly has one end connected to the lifting end and the other end connected to the moving end of the fitness equipment; A positioning component is disposed on the main frame and connected to the other end of the adjusting steel cable assembly. The positioning component is used to fix the adjusting steel cable assembly. In this process, the user pulls the adjusting cable assembly, causing the chain near the adjusting end of the chain positioning assembly to disengage from part of the counterweight. After the positioning assembly is positioned, the user pulls the actuating end, which in turn drives the counterweight engaged with the chain positioning assembly through the lifting end for training. The outer side of the chain positioning assembly is provided with a plurality of U-shaped positioning screw slots, and the positioning slot of the counterweight is provided with positioning screws corresponding to the U-shaped positioning screw slots. In the initial position, the positioning screw is engaged with the U-shaped positioning screw groove; by pulling the adjusting end, the positioning screw disengages from the U-shaped positioning screw groove.

2. The weight adjustment mechanism for fitness equipment according to claim 1, characterized in that, The positioning groove is opened from the center of the counterweight towards the long side of the counterweight, and the positioning screw is disposed on the side wall of the positioning groove located at the center of the counterweight.

3. The weight adjustment mechanism for fitness equipment according to claim 2, characterized in that, The counterweight assembly also includes: A limiting plate is disposed on the side surface of the counterweight to make the positioning groove form a sealing groove. The positioning screw is disposed opposite to the limiting plate, and the chain of the chain positioning assembly is U-shaped and confined within the sealing groove.

4. The weight adjustment mechanism for fitness equipment according to claim 1, characterized in that, The chain positioning component also includes: The connecting rod passes vertically through the positioning groove; A sprocket is located at the bottom end of the connecting rod; A chain, wound around the sprocket and moving along the connecting rod; Multiple U-shaped cover plates are evenly arranged on the outside of the chain, and each U-shaped cover plate is provided with a U-shaped positioning screw groove.

5. The weight adjustment mechanism for fitness equipment according to claim 4, characterized in that, It also includes a connection component, the connection component comprising: The main connecting body is located at the top of the connecting rod, and the counterweight guide rod of the counterweight assembly passes through the main connecting body; A center-of-gravity counterweight is disposed on the upper surface of the main connecting body; The center-of-gravity counterweight and the connecting rod are arranged opposite each other to keep the center of gravity of the chain positioning assembly stable during movement.

6. The weight adjustment mechanism for fitness equipment according to claim 1, characterized in that, The positioning component includes: An adjusting steel cable winding reel, wherein the other end of the adjusting steel cable assembly can be wound on the adjusting steel cable winding reel; A handle is provided on the adjusting steel cable winding disc; A positioning pin is connected to the handle; A positioning disc is located on the back of the adjusting steel cable winding disc, and multiple positioning holes are evenly distributed on it. When the handle is rotated, the adjusting steel cable assembly is wound around the adjusting steel cable winding disc. Pulling the handle can drive the positioning pin to be inserted into the selected positioning hole.

7. The weight adjustment mechanism for fitness equipment according to any one of claims 1 to 6, characterized in that, It also includes a limiting component, the limiting component comprising: A support device is mounted on the main frame; A connecting terminal assembly is disposed on the lifting cable assembly; In the initial position, the support device is sleeved with the connecting terminal assembly so that the positioning chain assembly and the counterweight assembly can be effectively engaged during training.

8. The weight adjustment mechanism for fitness equipment according to claim 7, characterized in that, The support device includes: A positioning welded pipe, one end of which is mounted on the main frame; A positioning threaded sleeve is disposed at the other end of the positioning welded pipe, and the connecting terminal assembly includes an adjusting through-hole bolt, which passes through the positioning threaded sleeve.

9. A fitness equipment, characterized in that, Includes a weight adjustment mechanism for fitness equipment as described in any one of claims 1-8.

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