Weight adjustment device for a trainer

Abstract

The utility model discloses a counter weight adjusting device for trainer belongs to the technical field of fitness equipment, including main frame, counter weight block subassembly is located the bottom of main frame, sliding rod is along the length direction of main frame and is established, linkage mechanism is slidably connected in sliding rod and has first position and second position with respect to sliding rod, the linkage mechanism fixed in the top of main frame in first position, the linkage mechanism for fixing counter weight block subassembly in second position. Through the free switching of linkage mechanism first position and second position, break the traditional 5KG minimum adjustment unit limit, when linkage mechanism switches from first position to second position, through the counter weight locking of free fall dynamics, save the manual plug -in plug -in plug process.

Description

Technical Field

[0001] This utility model relates to the technical field of fitness equipment, and in particular to a weight adjustment device for a training machine. Background Technology

[0002] Gym equipment typically needs to be used alternately. After one person finishes their workout, the next person needs to adjust the weights to their desired training load before starting. The current mainstream weight adjustment method is the pin-type adjustment, which adjusts the load by adding or removing weights. On the one hand, this method requires the user to manually select and fix the weights, which is time-consuming and results in long periods of inactivity between uses, failing to fully utilize the equipment. On the other hand, its minimum adjustment unit is usually 5KG, which limits precision and makes it difficult to meet the refined needs of trainees (especially beginners and those who need precise intensity control) for progressive loads. Improper load matching can easily affect training results. Utility Model Content

[0003] To overcome the technical problem of cumbersome weight adjustment in existing trainers, which makes it difficult to meet the refined needs of trainees for progressive compliance, this utility model provides a weight adjustment device for a trainer, comprising: a main frame; a weight block assembly located at the bottom of the main frame; a sliding rod arranged along the length of the main frame; and a linkage mechanism slidably connected to the sliding rod and having a first position and a second position relative to the sliding rod. The linkage mechanism located at the first position is fixed to the top of the main frame; the linkage mechanism located at the second position is used to fix the weight block assembly.

[0004] Furthermore, the linkage mechanism includes: a connecting plate located at the top of the counterweight assembly, the connecting plate having a mounting hole, the sliding rod passing through the mounting hole and being connected to the connecting plate in a transmission manner; and a suspension member rotatably connected to the connecting plate and having a first direction and a second direction relative to the connecting plate, wherein the suspension member located at the first position is in the first direction; and the suspension member located at the second position is in the second direction.

[0005] Furthermore, it also includes a suspension bracket, which is located at the top of the main frame and is fixedly connected to the main frame.

[0006] Furthermore, the suspension frame includes a load-bearing beam, which is arranged along the length of the suspension frame, and the linkage mechanism located at the first position is engaged with the load-bearing beam.

[0007] Furthermore, the suspension component includes a hook, a mounting base, a rotating shaft, and a torsion spring. The mounting base is fixedly mounted on the connecting plate. The hook has a rotating rod and a hook head integrally formed with the rotating rod. The rotating rod is rotatably connected to the mounting base through the rotating shaft. The torsion spring is sleeved on the rotating rod to limit the rotation angle of the hook head.

[0008] Furthermore, it also includes a fastening connecting sleeve, which is sleeved between the connecting plate and the sliding rod, and the fastening connecting sleeve is located below the connecting plate.

[0009] Furthermore, the counterweight assembly includes multiple counterweights and a connecting rod. Each of the multiple counterweights has a positioning hole, and the multiple counterweights are stacked together, with the positioning holes forming a positioning channel. A portion of the connecting rod is inserted and fixed in the positioning channel. The connecting plate has a connecting hole, and another portion of the connecting rod is correspondingly disposed with the connecting hole.

[0010] Furthermore, it also includes a traction mechanism, which includes a traction rope, the output end of which passes through the connecting hole and is detachably connected to the connecting rod.

[0011] Furthermore, the main frame includes a guide frame, which is tilted and fixed to the top of the main frame; the traction mechanism also includes a traction end, and the input end of the traction rope passes through the guide frame and is fixedly connected to the traction end.

[0012] Furthermore, the rotating rod has an L-shaped structure.

[0013] Beneficial effects:

[0014] The beneficial effects of adopting the technical solution of this utility model are as follows:

[0015] The counterweight assembly is fixed to the bottom of the main frame. The counterweight assembly serves as the load required for fitness. The sliding rod is set along the length of the main frame and serves as a guide channel for the linear movement of the linkage mechanism. The linkage mechanism can switch between the first position and the second position. When it is in the first position, it is fixed to the top of the main frame (prepared state, which is convenient for pre-adjusting the target load). When it slides to the second position, it is precisely connected to the counterweight assembly (working state). When the load needs to be increased during training, press the traction end of the traction mechanism (such as the handle, pull ring, etc.) to make the linkage mechanism move upward. Then release the hand, and the added counterweight will fall with gravity and combine with the counterweight assembly. Relying on the weight of the linkage mechanism, it can achieve instant response without power and automatically lock when it is in place. By freely switching between the first and second positions of the linkage mechanism, the traditional 5KG minimum adjustment unit limitation is broken. When the linkage mechanism switches from the first position to the second position, the counterweight is locked by the dynamics of free fall, eliminating the manual insertion and removal of the pin process, shortening the adjustment time, and filling the technical gap of long idle intervals of the equipment. It can realize precise load progression, which is suitable for beginners and people who need precise strength control. It also has the advantages of no energy dependence, reliable operation, and efficient adjustment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a counterweight adjustment device for a training machine according to the present invention;

[0018] Figure 2 This is a schematic diagram of the linkage mechanism of a counterweight adjustment device for a training device according to the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of a weight adjustment device suspension component for a training device according to this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a counterweight adjustment device suspension frame for a training device according to this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of a counterweight adjustment device linkage mechanism for a training device of the present invention, which is suspended on a suspension frame (the linkage mechanism is in the first position);

[0022] Figure 6 This is a utility model Figure 5 A cross-sectional view along the AA direction;

[0023] Figure 7 This is a schematic diagram of the structure of a counterweight adjustment device linkage mechanism for a training device of the present invention, which is in contact with the counterweight block assembly (the linkage mechanism is located in the second position);

[0024] Figure 8 This is a utility model Figure 7 A cross-sectional view along the BB direction.

[0025] Explanation of the reference numerals in the figure:

[0026] 1. Main frame; 2. Counterweight assembly; 21. Counterweight; 211. Positioning channel; 22. Connecting rod; 3. Sliding rod; 4. Linkage mechanism; 41. Connecting plate; 411. Mounting hole; 412. Connecting hole; 42. Suspension component; 421. Hook; 4211. Rotating rod; 4212. Hook head; 422. Mounting base; 423. Rotating shaft; 424. Torsion spring; 5. Traction mechanism; 51. Traction rope; 52. Traction end; 6. Fastening connecting sleeve; 7. Suspension frame; 71. Load-bearing beam; 8. Guide frame. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] Please refer to Figures 1 to 8 A counterweight adjustment device for a training machine includes: a main frame 1; a counterweight assembly 2 located at the bottom of the main frame 1; a sliding rod 3 arranged along the length of the main frame 1; and a linkage mechanism 4 slidably connected to the sliding rod 3 and having a first position and a second position relative to the sliding rod 3. The linkage mechanism 4 located at the first position is fixed to the top of the main frame 1, and the linkage mechanism 4 located at the second position is used to fix the counterweight assembly 2.

[0029] In this technical solution, the counterweight assembly 2 is fixed to the bottom of the main frame 1. The counterweight assembly 2 serves as the load required for fitness. The sliding rod 3 is set along the length of the main frame 1 and serves as a guide channel for the linear movement of the linkage mechanism 4. The linkage mechanism 4 can switch between a first position and a second position. When it is in the first position, it is fixed to the top of the main frame 1 (prepared state, which is convenient for pre-adjusting the target load). When it slides to the second position, it is precisely connected to the counterweight assembly 2 (working state). When the load needs to be increased during training, press the traction end of the traction mechanism (such as the handle, pull ring, etc.) to make the linkage mechanism 4 move upward. Then release the hand, and the added counterweight will fall with gravity and combine with the counterweight assembly 2. Relying on the weight of the linkage mechanism 4, it can achieve instant response without power and automatically lock when it is in place. By freely switching between the first and second positions of the linkage mechanism 4, the traditional 5KG minimum adjustment unit limitation is broken. When the linkage mechanism 4 switches from the first position to the second position, the counterweight is locked by the dynamics of free fall, eliminating the manual insertion and removal of the pin process, shortening the adjustment time, and filling the technical gap of long idle intervals of the equipment. It can realize precise load progression, which is suitable for beginners and people who need precise strength control. It has the advantages of no energy dependence, reliable operation, and efficient adjustment.

[0030] The specific implementation of the linkage mechanism 4 is as follows: Figure 2 As shown, the linkage mechanism 4 includes: a connecting plate 41 located at the top of the counterweight assembly 2, the connecting plate 41 having a mounting hole 411, the sliding rod 3 passing through the mounting hole 411 and being connected to the connecting plate 41 in a transmission manner; and a suspension member 42 rotatably connected to the connecting plate 41 and having a first direction and a second direction relative to the connecting plate 41, wherein the suspension member 42 located at the first position is in the first direction; and the suspension member 42 located at the second position is in the second direction.

[0031] In this technical solution, the linkage mechanism 4 mainly consists of a connecting plate 41 and a suspension member 42. These two components cooperate to switch the linkage mechanism 4 between the first and second positions within the sliding rod 3. To achieve power transmission, two sliding rods 3 are symmetrically arranged on both sides of the connecting plate 41 and coaxially pass through the mounting holes 411 of the connecting plate 41. The sliding rods 3 form a stable power transmission relationship with the connecting plate 41 through keyed connections, spline fits, or interference fits. The manual suspension member 42 can drive the connecting plate 41 to move linearly along the length of the sliding rods 3. Simultaneously, the suspension member 42 has two fixed rotational directions relative to the connecting plate 41: a first direction and a second direction, enabling precise control and preventing directional deviation or misalignment. When the linkage mechanism 4 is in the first working position, the suspension member 42 rotates along the first direction until it is fixed to the top of the main frame 1. The linkage mechanism 4 is suspended. When the linkage mechanism 4 needs to switch to the second position, the manual suspension member 42 rotates from the first direction to the second direction, separating the linkage mechanism 4 from the top of the main frame 1. The linkage mechanism 4 then falls freely. By combining the transmission load of the connecting plate 41 with the directional switching of the suspension component 42, the reliability of power transmission is ensured, and the precise adaptation of the suspension component 42 under different working positions is achieved.

[0032] It should be noted that the specific embodiment of suspension component 42 is provided by Figure 3 As shown, the suspension component 42 includes a hook 421, a mounting base 422, a rotating shaft 423, and a torsion spring 424. The mounting base 422 is fixedly installed on the connecting plate 41. The hook 421 has a rotating rod 4211 and a hook head 4212 integrally formed with the rotating rod 4211. The rotating rod 4211 has an L-shaped structure. The rotating rod 4211 is rotatably connected to the mounting base 422 through the rotating shaft 423. The torsion spring 424 is sleeved on the rotating rod 4211 to limit the rotation angle of the hook head 4212. The hook head 4212 has only two rotation angles: a first direction and a second direction.

[0033] The embodiment of the linkage mechanism 4 located in the first position is as follows: Figure 5 and Figure 6 As shown, the counterweight adjustment device also includes a suspension frame 7, which is located at the top of the main frame 1 and is fixedly connected to the main frame 1. When the linkage mechanism 4 in the first position is connected to the suspension frame 7, the structure is stable and not easy to fall off.

[0034] The specific embodiment of the suspension bracket 7 is as follows: Figure 4As shown, the suspension frame 7 includes a load-bearing beam 71, which is arranged along the length of the suspension frame 7. The linkage mechanism 4 located at the first position is engaged with the load-bearing beam 71, so that the suspension frame 7 is stable in bearing the load. The linkage mechanism 4 located at the first position is stably arranged on the suspension frame 7.

[0035] Furthermore, by Figure 1 , Figures 5 to 8 As shown, the counterweight adjustment device also includes a fastening connecting sleeve 6, which is sleeved between the connecting plate 41 and the sliding rod 3, and is located below the connecting plate 41. In specific implementations, the fastening connecting sleeve 6 can be a nylon sleeve. Specifically, the fastening connecting sleeve 6 is embedded into the mounting hole 411 of the connecting plate 41 of the linkage mechanism 4 to ensure a tight fit and limit the hole-shaft clearance. Then, the fastening connecting sleeve 6 and the counterweight assembly 2 are connected with bolts of specified specifications. The sliding rod 3 passes through the mounting hole 411 of the connecting plate 41 and the center hole of the fastening connecting sleeve 6 in sequence, and is inserted into the shaft hole of the counterweight assembly 2 to ensure accurate positioning. After pushing the fastening connecting sleeve 6 upward to its maximum stroke, it is released, and the linkage mechanism 4 locks itself using its own weight. Then, the bolts are tightened.

[0036] The assembly relationship of counterweight assembly 2 is as follows: Figures 5 to 8 As shown, the counterweight assembly 2 includes multiple counterweights 21 and connecting rods 22. Each counterweight 21 has a positioning hole, and the counterweights 21 are stacked vertically, forming a positioning channel 211. A portion of the connecting rod 22 passes through and is fixed in the positioning channel 211. The connecting plate 41 has a connecting hole 412, and another portion of the connecting rod 22 is correspondingly positioned with the connecting hole 412. This is specifically described in patent application publication number CN112933511A, and will not be elaborated upon here. The corresponding positioning of the connecting rod 22 with the connecting hole 412 of the connecting plate 41 allows for precise engagement with the counterweight assembly 2 during free fall of the linkage mechanism 4.

[0037] Depend on Figure 1As shown, the counterweight adjustment device also includes a traction mechanism 5, which includes a traction rope 51. The output end of the traction rope 51 passes through the connecting hole 412 and is detachably connected to the connecting rod 22. During assembly, the traction mechanism 5 must be installed simultaneously: after the sliding rod 3 is assembled with the counterweight assembly 2 and the connecting plate 41 of the linkage mechanism 4, the output end of the traction rope 51 of the traction mechanism 5 is passed through the connecting hole 412 on the connecting plate 41 and connected to the connecting rod 22 of the counterweight assembly 2 using a detachable method such as a hook, buckle, lock, or magnetic attraction, ensuring a secure connection and that the traction rope 51 is not twisted. After completion, manually pull the traction rope 51 to check the linkage effect. It must be ensured that when the traction rope 51 is pulled, the counterweight assembly 2 can smoothly rise and fall along the sliding rod 3, and after releasing the hand, the linkage mechanism 4 can lock under its own weight, and there is no friction or jamming between the traction rope 51 and the edge of the connecting hole 41. If the traction rope 51 deviates, the alignment of the connecting hole 412 on the connecting plate 41 or the fixed angle of the traction rope 51 can be finely adjusted to ensure that the traction mechanism 5, the counterweight assembly 2, and the linkage mechanism 4 operate smoothly together.

[0038] Furthermore, the main frame 1 includes a guide frame 8, which is tilted and fixed to the top of the main frame 1; the traction mechanism 5 also includes a traction end 52, and the input end of the traction rope 51 passes through the guide frame 8 and is fixedly connected to the traction end 52. During assembly, the guide frame 8 of the main frame 1 must first be tilted and fixed to the top of the main frame 1 for easy traction. Then, the input end of the traction rope 51 is passed through the pre-set rope-passing channel (or pulley block) of the guide frame 8, ensuring the rope is smooth and untangled. The end of the passed traction rope 51 is then fixed to the traction end 52 (such as a handle, pull ring, etc.) using methods such as crimping, rope clamping, or bolt fastening. Through the guiding action of the guide frame 8, the traction direction must be coordinated with the lifting trajectory of the counterweight assembly 2 to ensure smooth operation during pulling. If rope deviation occurs, the fixing angle of the guide frame 8 or the position of the rope-passing hole can be finely adjusted to ultimately form a continuous force transmission path between the traction end 52, the traction rope 51, and the guide frame 8.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A counterweight adjustment device for a training machine, characterized in that, include: Main frame (1); The counterweight assembly (2) is located at the bottom of the main frame (1); The sliding rod (3) is set along the length direction of the main frame (1); The linkage mechanism (4) is slidably connected to the sliding rod (3) and has a first position and a second position relative to the sliding rod (3). The linkage mechanism (4) located in the first position is fixed to the top of the main frame (1); the linkage mechanism (4) located in the second position is used to fix the counterweight assembly (2).

2. The counterweight adjustment device for a trainer according to claim 1, characterized in that, The linkage mechanism (4) includes: The connecting plate (41) is located at the top of the counterweight assembly (2). The connecting plate (41) has a mounting hole (411). The sliding rod (3) passes through the mounting hole (411) and is connected to the connecting plate (41) in a transmission manner. The suspension member (42) is rotatably connected to the connecting plate (41) and has a first direction and a second direction relative to the connecting plate (41). The suspension member (42) located in the first position is in the first direction; the suspension member (42) located in the second position is in the second direction.

3. The weight adjustment device for a trainer according to claim 1, characterized in that, It also includes a suspension bracket (7), which is located at the top of the main frame (1) and is fixedly connected to the main frame (1).

4. The counterweight adjustment device for a trainer according to claim 3, characterized in that, The suspension frame (7) includes a load-bearing beam (71), which is arranged along the length of the suspension frame (7). The linkage mechanism (4) located at the first position is engaged with the load-bearing beam (71).

5. The counterweight adjustment device for a trainer according to claim 2, characterized in that, The suspension component (42) includes a hook (421), a mounting base (422), a rotating shaft (423), and a torsion spring (424). The mounting base (422) is fixedly installed on the connecting plate (41). The hook (421) has a rotating rod (4211) and a hook head (4212) integrally formed with the rotating rod (4211). The rotating rod (4211) is rotatably connected to the mounting base (422) through the rotating shaft (423). The torsion spring (424) is sleeved on the rotating rod (4211) to limit the rotation angle of the hook head (4212).

6. The counterweight adjustment device for a trainer according to claim 2, characterized in that, It also includes a fastening connecting sleeve (6), which is sleeved between the connecting plate (41) and the sliding rod (3), and the fastening connecting sleeve (6) is located below the connecting plate (41).

7. A counterweight adjustment device for a trainer according to claim 2, characterized in that, The counterweight assembly (2) includes multiple counterweights (21) and connecting rods (22). Each of the multiple counterweights (21) has a positioning hole. The multiple counterweights (21) are stacked together, and the positioning holes form a positioning channel (211). A portion of the connecting rod (22) is inserted and fixed in the positioning channel (211). The connecting plate (41) has a connecting hole (412), and another portion of the connecting rod (22) is correspondingly arranged with the connecting hole (412).

8. The counterweight adjustment device for a trainer according to claim 7, characterized in that, It also includes a traction mechanism (5), which includes a traction rope (51), the output end of which passes through the connection hole (412) and is detachably connected to the connecting rod (22).

9. A counterweight adjustment device for a trainer according to claim 8, characterized in that, The main frame (1) includes a guide frame (8), which is tilted and fixed at the top of the main frame (1); the traction mechanism (5) also includes a traction end (52), and the input end of the traction rope (51) passes through the guide frame (8) and is fixedly connected to the traction end (52).

10. A counterweight adjustment device for a trainer according to claim 5, characterized in that, The rotating rod (4211) has an L-shaped structure.

Images