Counterweight ratio structure for strength training machine
Through the design of the support frame and adjustment mechanism, the angle of the seat and backrest of the strength training machine and the counterweight can be adjusted flexibly, which solves the problem that traditional strength training machines cannot adapt to different users and improves training effect and safety.
Patent Information
- Application Number
- CN202511553692.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-01-02
AI Technical Summary
The weight distribution structure of traditional strength training machines cannot adapt to the different body shapes and training needs of different users, resulting in decreased training effectiveness and increased risk of sports injuries.
A structure including a support frame, an adjustment mechanism, and an adjustable seat and backrest is designed. The angle of the seat and backrest can be flexibly adjusted through hydraulic rods and locking bolts, and the training resistance can be adjusted through sliding counterweights to meet the needs of different users.
It enables flexible adjustment of the seat and backrest angles to adapt to different user body shapes, reducing the risk of sports injuries and improving training effectiveness as well as the equipment's versatility and practicality.
Smart Images
Figure CN121243712A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of fitness equipment technology, specifically relating to a weight ratio structure for a strength training machine. Background Technology
[0002] With the improvement of living standards, people have increasingly higher requirements for physical fitness, and fitness equipment such as strength training machines are becoming increasingly popular. Fitness equipment is a general term for sports equipment used for physical training. Based on function, it can be divided into two main categories: single-function equipment (such as treadmills, rowing machines, elliptical trainers, etc.) and multi-functional equipment. The former focuses on strength or cardio training for specific body parts, while the latter integrates multiple functions such as chest expanders and bench presses. Commercial and home-use products differ in design; for example, smart treadmills are equipped with entertainment and automatic adjustment functions. The development of China's fitness equipment industry began in the late 1980s. With China's accession to the WTO and Beijing's successful bid for the Olympics, favorable conditions and development opportunities were provided for the industry. The continuous expansion of the fitness population brought significant business opportunities to fitness equipment manufacturers. However, while the Chinese fitness equipment industry has developed rapidly, some problems have also become increasingly apparent. In particular, there is a lack of well-known brands in the international market, resulting in low product added value. Furthermore, compared with international advanced levels, many Chinese manufacturers are still in the imitation production stage, lacking sufficient product research and development and technological innovation capabilities. In the consumer sector, compared with developed countries in Europe and America, the penetration rate of fitness equipment products in households and the per capita consumption for fitness activities are still very low.
[0003] In the field of strength training, strength training machines are essential equipment for helping people build muscle strength. The weight distribution structure, as a core component of a strength training machine, directly affects the training effect and experience. Traditional strength training machines mostly only allow for simple weight adjustments to regulate resistance; strength training machines are also known as seated shoulder press machines.
[0004] However, there are still some shortcomings in the currently used traditional strength training machines. For example, different users have different body shapes, training goals and joint range of motion. If the angle between the seat and the backrest is fixed, some users may not be able to be in a natural, comfortable and efficient posture when performing strength training movements because the angle of the seat and the backrest does not conform to their own body structure. This may lead to a decrease in training effect and also increase the risk of sports injury. Summary of the Invention
[0005] The purpose of this invention is to provide a weight ratio structure for a strength training machine to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A weight distribution structure for a strength training machine includes: a mounting box, a support frame fixed to one side of the mounting box, a seat provided on one side of the support frame, a backrest provided on one side of the seat, and an adjustment mechanism provided on one side of the support frame; the support frame serves as the skeleton structure of the entire strength training machine, with one end fixed to the mounting box, and can stably support the weight of the weight blocks, seat, backrest, and other core components inside the mounting box, preventing the equipment from deforming or tipping due to the weight of the components or training stress, thus ensuring the structural stability of the equipment; the support frame is supported by specific steel, thereby ensuring stability during support and extending its service life.
[0008] The adjustment mechanism includes two mounting blocks, a connector is rotatably mounted between the mounting blocks, a hydraulic rod is fixed between the connectors, multiple toothed grooves are opened on one side of the support frame, a stabilizing plate is rotatably mounted on one side of the support frame, a fixing block is fixed on one side of the back pad, the fixing block is rotatably connected to the support frame, and a locking bolt is slidably inserted between the fixing block and the support frame.
[0009] Preferably, a fixed cylinder is fixed on each side of the support frame, and a training rod is rotatably installed inside the fixed cylinder. The training rod is a key connecting component between the user and the equipment's counterweight system. By holding the training rod and applying force, the user can transfer the force to the subsequent connecting steel rope, pulley system and counterweight, thereby overcoming the counterweight resistance to complete training actions such as pushing and lifting. It is the core force-generating medium for achieving strength training.
[0010] Preferably, a hammer-shaped handle is fixed to the outer wall of the training bar, and one end of the hammer-shaped handle is inclined upward.
[0011] Preferably, the training bar has a handle fixed to its outer wall. The handle provides the user with a clear and stable grip position, and the outer wall is equipped with an anti-slip sleeve to prevent the hand from slipping or the grip from being unstable during training. This ensures that the force can be accurately transmitted to the training bar, guaranteeing the continuity and controllability of training movements such as pushing and lifting, and reducing movement deformation caused by grip problems.
[0012] Preferably, multiple counterweights are slidably installed inside the mounting box, and a rod is slidably inserted into one of the counterweights. The training resistance can be flexibly adjusted by the multiple counterweights sliding inside the mounting box. By increasing or decreasing the number of counterweights slidably installed inside the mounting box, the overall load weight can be flexibly changed to suit different users, such as beginners and advanced users with varying strength levels. It can also meet the different resistance requirements of the same user at different training stages, such as muscle building and body shaping, avoiding poor training results or sports injuries due to fixed resistance. The load can be quickly switched by inserting the rod into different counterweights. The operation is simple. The rod slides into the designated counterweight and can quickly lock the selected counterweight, preventing the counterweight from accidentally sliding or falling off during training and ensuring stable force transmission.
[0013] Preferably, a connecting block is fixed to the outer wall of the training rod, a pulley system is provided inside the support frame, a connecting steel rope is provided between the pulley system and the connecting block, and one end of the connecting steel rope is fixedly connected to one side of the insertion rod.
[0014] Preferably, a stabilizing washer is fixed to the bottom of the support frame, and the stabilizing washer is made of rubber.
[0015] Preferably, the two mounting blocks are respectively fixed to the bottom of the seat and one side of the support frame, and the stabilizing plate is rotatably engaged with the toothed groove.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] The adjustment mechanism allows for easy and convenient smooth adjustment of the backrest and seat angles while ensuring a secure lock-in after adjustment. This caters to the body shapes and training needs of different users and prevents force shifting caused by equipment shaking during training. Users can maintain a natural posture, reducing the risk of sports injuries to the waist, shoulders, and other areas. This also enhances the versatility and practicality of the strength training machine. Furthermore, users can operate the adjustment mechanism with one hand, improving convenience and efficiency. Attached Figure Description
[0018] Figure 1 This is one of the perspective views of the present invention;
[0019] Figure 2 This is a side view of the structure of the present invention;
[0020] Figure 3 This is a schematic diagram of the handle of the present invention;
[0021] Figure 4 This is a schematic diagram of the structure at the fixing block of the present invention;
[0022] Figure 5 This is a schematic diagram of the structure of the insertion rod of the present invention;
[0023] Figure 6 This is a schematic diagram of the connector of the present invention.
[0024] In the diagram: 1. Mounting box; 2. Support frame; 3. Seat; 4. Backrest; 5. Mounting block; 51. Connector; 52. Hydraulic rod; 53. Gear; 54. Stabilizing plate; 55. Fixing block; 56. Locking bolt; 6. Fixing cylinder; 7. Training bar; 8. Hammer handle; 9. Handle; 10. Counterweight; 11. Insert rod; 12. Pulley block; 13. Connecting block; 14. Connecting steel rope; 15. Stabilizing washer. Detailed Implementation
[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," etc., 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 with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0027] Example 1:
[0028] Please see Figures 1-6 As shown, a weight distribution structure for a strength training machine includes: a mounting box 1, a support frame 2 fixed to one side of the mounting box 1, a seat 3 provided on one side of the support frame 2, a back cushion 4 provided on one side of the seat 3, and an adjustment mechanism provided on one side of the support frame 2.
[0029] The adjustment mechanism includes two mounting blocks 5, a connector 51 is rotatably mounted between the mounting blocks 5, a hydraulic rod 52 is fixed between the connectors 51, multiple toothed grooves 53 are opened on one side of the support frame 2, a stabilizing plate 54 is rotatably mounted on one side of the support frame 2, a fixing block 55 is fixed on one side of the back pad 4, the fixing block 55 is rotatably connected to the support frame 2, and a locking bolt 56 is slidably inserted between the fixing block 55 and the support frame 2.
[0030] Two mounting blocks 5 are fixed to the bottom of the seat 3 and one side of the support frame 2 respectively, and the stabilizing plate 54 and the toothed groove 53 are rotatably engaged.
[0031] As can be seen from the above, during use, when it is necessary to adjust the angle of the seat 3, the stabilizing plate 54 is rotated to remove its support for the seat 3. Then, by pulling the hydraulic rod 52, the extension and retraction of the hydraulic rod 52 causes the connector 51 to rotate in the mounting block 5, thereby achieving the angle adjustment of the seat 3. After adjustment, the stabilizing plate 54 is rotated to engage with the toothed groove 53, thereby supporting and fixing the seat 3. When it is necessary to adjust the backrest 4, the locking bolt 56 is first pulled out to release the fixation, and then the fixing block... 55 rotates between the support frame 2. After rotation and adjustment, the locking bolt 56 is inserted between the fixing block 55 and the support frame 2 for fixation. Therefore, the adjustment mechanism can easily and conveniently achieve smooth adjustment of the angle between the back pad 4 and the seat 3, and ensure that the position is firmly locked after adjustment. This meets the needs of different users' body shapes and training movements, and can avoid force shift caused by equipment shaking during training. Users can maintain a natural force exertion posture, reduce the risk of sports injuries to the waist, shoulders and other parts, and improve the versatility and practicality of the strength training machine.
[0032] Two mounting blocks 5 are fixed to the bottom of the seat 3 and one side of the support frame 2 respectively, providing a stable and symmetrical mounting base for components such as the hydraulic rod 52. This makes the force on the seat 3 more even during angle adjustment, ensuring smooth and stable adjustment, and also enhancing the connection reliability of the overall structure.
[0033] The core function of seat 3 is to provide a stable support base for the user, ensuring that the body is in a stable horizontal position during training and avoiding force deviation caused by body swaying. At the same time, in conjunction with the adjustment mechanism, it can adapt to the hip position of users of different heights and body types, allowing users to train in a comfortable sitting posture that conforms to the logic of force exertion, reducing the problem of the lower back being unsupported or unevenly stressed. The core function of back cushion 4 is to provide vertical support for the user's back. During training, it can conform to the back to maintain an upright or specific tilted posture, preventing excessive extension or compensation of the back due to excessive force exertion, and protecting the lumbar spine and other parts from injury. Moreover, the tilt angle can be changed through the adjustment mechanism to adapt to the back support angle requirements of different training movements such as shoulder press and chest press, helping users to more accurately concentrate the force on the target muscle groups.
[0034] The support frame 2 serves as the skeleton structure of the entire strength training machine. One end of the support frame 2 is fixed to the mounting box 1, which can stably support the weight of the core components such as the counterweight 10, seat 3, and back pad 4 inside the mounting box 1, preventing the equipment from deforming or tipping over due to the weight of the components or the stress of training, thus ensuring the structural stability of the equipment. The support frame 2 is supported by specific steel, which can ensure stability during support and extend its service life.
[0035] Specifically, regarding the above, please refer to... Figures 1-4 and Figure 6As shown, a fixed cylinder 6 is fixed on both sides of the support frame 2, and a training rod 7 is rotatably installed inside the fixed cylinder 6; a hammer-shaped handle 8 is fixed on the outer wall of the training rod 7, and one end of the hammer-shaped handle 8 is tilted upward; a handle 9 is fixed on the outer wall of the training rod 7.
[0036] As can be seen from the above, the fixed cylinders 6 on both sides provide a symmetrical and stable rotating mounting base for the training bar 7, ensuring that the training bar 7 is not easily deflected or wobbled when subjected to force, and allowing the training bar 7 to rotate smoothly, meeting the needs of different training movements such as pushing and lifting, and improving training safety and movement continuity. The upward tilt of one end of the hammer handle 8 is ergonomic, guiding the user to hold it naturally, reducing the force compensation of the wrist and arm, and making the force more concentrated on the target muscle groups (such as the shoulder and chest), while avoiding joint discomfort caused by prolonged training, thus improving training efficiency and comfort. The hammer handle 8 and handle 9 are set on the outer wall of the training bar 7, which can be adapted to users with different training movements (such as shoulder press and chest press) and different grip habits. The training mode can be switched without the need to change additional parts, enhancing the equipment. The versatility of the handle expands the training scenarios. The upward angle of the handle 9 effectively prevents excessive external rotation of the elbow joint, conforms to the anatomical structure of the shoulder joint, reduces abnormal stress on the shoulder ligaments, and avoids injuries caused by acromion impingement or compression. The handle 9 provides the user with a clear and stable grip position, and the anti-slip sleeve on the outer wall prevents hand slippage or unstable grip during training, ensuring that force is accurately transmitted to the training bar 7. This guarantees the continuity and controllability of pushing and lifting exercises, reducing movement deformation caused by grip issues. The training bar 7, as a key connecting component between the user and the equipment's weight system, allows the user to apply force by gripping the training bar 7, transmitting the force to the subsequent connecting steel cable 14, pulley system 12, and counterweight 10, thereby overcoming counterweight resistance to complete pushing and lifting exercises. It is the core force-generating medium for strength training.
[0037] Example 2:
[0038] refer to Figures 1-6 As shown, multiple counterweights 10 are slidably installed inside the mounting box 1, and a rod 11 is slidably inserted inside one of the counterweights 10; a connecting block 13 is fixed to the outer wall of the training rod 7; a pulley group 12 is provided inside the support frame 2; a connecting steel rope 14 is provided between the pulley group 12 and the connecting block 13; one end of the connecting steel rope 14 is fixedly connected to one side of the rod 11; a stabilizing washer 15 is fixed to the bottom of the support frame 2, and the stabilizing washer 15 is made of rubber.
[0039] As can be seen from the above, the training resistance can be flexibly adjusted by sliding multiple weight blocks 10 inside the mounting box 1. By increasing or decreasing the number of weight blocks 10 slidably installed inside the mounting box 1, the overall load weight can be flexibly changed to suit different users, such as beginners and advanced users with varying strength levels. It can also meet the different resistance needs of the same user at different training stages, such as muscle building and body shaping, avoiding poor training results or sports injuries due to fixed resistance. The load can be quickly switched by inserting the rod 11 into different weight blocks 10. The operation is simple. The rod 11 slides into the designated weight block and can quickly lock the selected weight, preventing the weight block 10 from accidentally sliding or falling off during training and ensuring stable force transmission. At the same time, the weight block 10... The sliding installation avoids jamming or misalignment during adjustment, improving safety and efficiency. The training rod 7 forms a transmission structure with the connecting block 13, connecting steel rope 14, and pulley group 12. The pulley group 12 can effectively change the direction of force and reduce friction, making the force transmission smoother when the user exerts force, and avoiding the impact of force transmission loss on training effect. The connecting steel rope 14 is directly fixed to the insertion rod 11, ensuring stable linkage between the counterweight block 10 and the training rod 7, with no risk of loosening. The rubber stabilizing washer 15 at the bottom of the support frame 2 can increase the friction with the ground, preventing the equipment from shaking or shifting due to force during training. At the same time, the rubber material can buffer the collision between the equipment and the ground, reduce noise, and improve the stability and environmental adaptability of use.
[0040] Working principle: In use, rotating the stabilizing plate 54 causes it to lose support for the seat 3. Then, pulling the hydraulic rod 52 causes the connector 51 to rotate within the mounting block 5, thereby adjusting the angle of the seat 3. After adjustment, rotating the stabilizing plate 54 causes it to engage with the toothed groove 53, thus supporting and fixing the seat 3. When adjusting the backrest 4, first pull out the locking bolt 56 to release the fixation. Then, the fixing block 55 rotates between the support frame 2. After adjustment, insert the locking bolt 56 between the fixing block 55 and the support frame 2 to fix it. Therefore, the angle of the seat 3 and the backrest 4 can be adjusted.
[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A weight distribution structure for a strength training machine, characterized in that, include: Mounting box (1), a support frame (2) is fixed on one side of the mounting box (1), a seat (3) is provided on one side of the support frame (2), a back cushion (4) is provided on one side of the seat (3), and an adjustment mechanism is provided on one side of the support frame (2). The adjustment mechanism includes two mounting blocks (5), a connector (51) is rotatably mounted between the mounting blocks (5), a hydraulic rod (52) is fixed between the connectors (51), a plurality of toothed grooves (53) are provided on one side of the support frame (2), a stabilizing plate (54) is rotatably mounted on one side of the support frame (2), a fixing block (55) is fixed on one side of the back pad (4), the fixing block (55) is rotatably connected to the support frame (2), and a locking bolt (56) is slidably inserted between the fixing block (55) and the support frame (2).
2. The weight ratio structure for a strength training machine according to claim 1, characterized in that: The support frame (2) has a fixed cylinder (6) fixed on both sides, and a training rod (7) is rotatably installed inside the fixed cylinder (6).
3. The weight ratio structure for a strength training machine according to claim 2, characterized in that: The training bar (7) has a hammer-shaped handle (8) fixed to its outer wall, with one end of the hammer-shaped handle (8) tilted upwards.
4. The weight ratio structure for a strength training machine according to claim 2, characterized in that: The training rod (7) has a handle (9) fixed to its outer wall.
5. The weight ratio structure for a strength training machine according to claim 1, characterized in that: Multiple counterweights (10) are slidably installed inside the mounting box (1), and a rod (11) is slidably inserted inside one of the counterweights (10).
6. The weight ratio structure for a strength training machine according to claim 2, characterized in that: The training rod (7) has a connecting block (13) fixed on its outer wall. The support frame (2) has a pulley group (12) inside. A connecting steel rope (14) is provided between the pulley group (12) and the connecting block (13). One end of the connecting steel rope (14) is fixedly connected to one side of the insertion rod (11).
7. The weight ratio structure for a strength training machine according to claim 1, characterized in that: The bottom of the support frame (2) is fixed with a stabilizing washer (15), which is made of rubber.
8. The weight ratio structure for a strength training machine according to claim 1, characterized in that: The two mounting blocks (5) are respectively fixed to the bottom of the seat (3) and one side of the support frame (2), and the stabilizing plate (54) and the toothed groove (53) are rotatably engaged.