Counterweight device

Abstract

The utility model provides a counter weight device, relates to fitness equipment technical field, including frame and link mechanism, the upper end of frame outside is equipped with central rotating shaft, the inside of central rotating shaft is rotatingly equipped with position adjusting disc, and the outside of central rotating shaft is rotatingly equipped with arm of force. A plurality of groups of positioning holes are formed in one end in the position adjusting disc; the single-acting and double-acting torque output device is formed by matching the frame upper force arm, the position adjusting disc and the connecting rod mechanism, single-sided torque output can be achieved by independently using a single-sided structure, double-sided torque output can be achieved by connecting the middle and the two sides to form an integral frame, and the single-acting and double-acting functional requirements in strength training equipment are met. The torque shaft and the training device are connected through the universal joint, the output torque is output in all directions through the flexibility of the universal joint, the universal modular design of the hanging piece counterweight device is achieved, and the hanging piece counterweight device is suitable for strength training devices of different types.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, in particular to a weight counterweight device. Background Art

[0002] The barbell plate weight structure of traditional plate-loaded strength training equipment is usually integrated into the single-function equipment, which cannot be modularized. It is impossible to use a universal standard weight device for all types of strength training equipment, and standardization and uniformity are not achieved. Since the weight structure of each equipment needs to be considered separately during the design process, the product design cycle and design cost are increased.

[0003] like Figure 15 The figure shows the motion resistance curve of a traditional fixed plate. The barbell plate weight structure used in existing plate-loaded strength training equipment has a fixed movement angle. In other words, the resistance curve of each reciprocating motion is constant, which makes it impossible to provide more diverse and flexible variable resistance training (VRT). Variable resistance training (VRT) is a strength training method characterized by providing different resistance levels throughout the entire range of motion. Unlike traditional constant resistance training, VRT It aims to adjust the resistance according to the strength curve of the muscle at a specific joint angle; in strength training, according to the variability of resistance, it is divided into equal resistance training and variable resistance training. Isoresistance training refers to a training mode that provides constant resistance during a single cycle of exercise. Traditional dumbbells, barbells, plate-weighted strength equipment, plate-weighted strength equipment, etc. are basically equipment that provide a constant resistance training mode. Variable resistance training refers to equipment that can change resistance during a single cycle of exercise, such as using elastic ropes, spring tensioners, chains and other equipment. Experimental studies have shown that variable resistance training is more in line with actual exercise, can better simulate the strength requirements in daily life and exercise, and make training more functional; and can fully stimulate Stimulate muscles, and the changes in resistance at different stages can stimulate muscle fibers more comprehensively and promote balanced muscle development; at the same time, it can also avoid plateaus. Since the resistance keeps changing, it is difficult for the body to fully adapt, which helps to reduce the occurrence of training plateaus. In view of this, it is very necessary to implement variable resistance training on strength training equipment. However, traditional strength training equipment with fixed hanging tracks can only provide a fixed resistance curve. The method to achieve variable resistance training is usually to add auxiliary devices such as elastic bands and chains to the equipment, but this method can only provide a one-way resistance increasing training method, and the operation is complicated, resulting in interruptions in the training process. Therefore, the utility model proposes a counterweight device to solve the problems existing in the prior art. Summary of the Invention

[0004] In response to the above problems, the present invention proposes a counterweight device, which connects the torque shaft and the training equipment through a universal joint. The flexibility of the universal joint is utilized to meet the output of the output torque in all directions, thereby realizing a universal modular design of the hanging plate counterweight device, making it suitable for different types of strength training equipment, and reducing manufacturing costs and usage costs.

[0005] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a counterweight device, comprising:

[0006] A frame, wherein a central rotating shaft is provided at the upper end of the outer side of the frame;

[0007] A central rotating shaft, a position adjustment disk is provided on the inner side of the central rotating shaft, and a force arm is provided on the outer side of the central rotating shaft. A positioning hole is provided on the disk surface of the position adjustment disk, and an elastic latch is provided on the arm body of the force arm, and the elastic latch is adapted to the positioning hole;

[0008] The torque shaft is rotatably arranged at the front end portion of the lower inner side of the frame, the inner side of the torque shaft is connected to the training device through a universal joint, and the outer side of the torque shaft is connected to the position adjustment disk through a connecting rod mechanism.

[0009] A further improvement is that the connecting rod mechanism includes a first connecting rod and a second connecting rod, the outer side of the torque shaft is connected to the first connecting rod, and one end of the first connecting rod is hinged to the second connecting rod, and the upper end of the second connecting rod is hinged to the inner middle end of the position adjustment disk.

[0010] A further improvement is that: the frames are provided in at least one group, an intermediate crossbeam is connected between two groups of the frames, and the intermediate crossbeam is provided in at least one group.

[0011] A further improvement is that the two groups of frames and the middle crossbeam form an integral structural frame, and a rubber pad is provided at the bottom of the integral structural frame.

[0012] A further improvement is that the front end of the overall structural frame is used to install the training device, and the training device is fixed to the middle crossbeam, and the functional connection of the training device is connected to the torque shafts on both sides through the universal joint.

[0013] A further improvement is that a movable cover is slidingly provided on the front end of the lever arm, and a hanging rod is provided on the outside of the movable cover. Tracks are provided at the upper and lower front ends of the lever arm, and sliders are movably provided on the upper and lower tracks. The movable cover is fixed to the slider by bolts.

[0014] A further improvement is that a fixing hole is provided at the front end of the outer side of the lever arm, and multiple groups of fixing holes are provided at equal intervals. A screw is installed on the internal thread of the hanging point rod, and the inner end of the screw is adapted to the fixing hole. The hanging point rod is used to install barbell plates.

[0015] A further improvement is that the position adjustment disk and the force arm both rotate around the central rotation axis, and the position adjustment disk and the force arm rotate independently.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model is composed of a force arm on the frame, a position adjustment plate and a connecting rod mechanism. It can realize unilateral torque output by using a single-side structure alone, or realize bilateral torque output by connecting the two sides in the middle to form an integral frame, meeting the functional requirements of single-action and double-action in strength training equipment. The torque shaft and the training equipment are connected by a universal joint. The flexibility of the universal joint is utilized to meet the output torque in all directions, realizing a universal modular design of the plate counterweight device, making it applicable to different types of strength training equipment, and reducing manufacturing and use costs.

[0018] 2. The utility model coaxially mounts the lever arm and the position adjustment disk on the central rotating shaft. The position adjustment disk is provided with a positioning hole at a specific angle. The position adjustment disk rotates around the central rotating shaft at a fixed motion angle and transmits the torque to the torque axis through a connecting rod structure. At the same time, the lever arm is connected to the positioning hole through an elastic pin, and the lever arm also rotates freely around the central rotating shaft. When the elastic pin of the lever arm is inserted into different positioning holes, the lever arm will have different starting angles, and different motion resistance curves can be obtained, thereby providing the resistance curve required for variable resistance training (VRT) for training equipment with different functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the main view of the utility model;

[0020] Figure 2 This is a schematic diagram of a single-sided frame of the present utility model;

[0021] Figure 3 This is a schematic diagram of the installation of the position adjustment disk and the lever arm of the utility model;

[0022] Figure 4 This is a schematic diagram of the installation of the training device of the present utility model;

[0023] Figure 5 This is a schematic diagram of the motion of the utility model from a starting angle of 40° to an end angle of 90°;

[0024] Figure 6 This is a resistance curve diagram of Example 2 of the present utility model;

[0025] Figure 7 This is a schematic diagram of the motion of the utility model from a starting angle of 52.5° to an end angle of 102.5°;

[0026] Figure 8This is a schematic diagram of the resistance curve of Example 3 of the present utility model;

[0027] Figure 9 This is a schematic diagram of the motion of the utility model from a starting angle of 65° to an end angle of 115°;

[0028] Figure 10 This is a schematic diagram of a resistance curve of the fourth embodiment of the present utility model;

[0029] Figure 11 This is a schematic diagram of the motion of the utility model from a starting angle of 77.5° to an end angle of 127.5°;

[0030] Figure 12 This is a schematic diagram of the resistance curve of Example 5 of the present utility model;

[0031] Figure 13 This is a schematic diagram of the motion of the utility model from a starting angle of 90° to an end angle of 140°;

[0032] Figure 14 This is a resistance curve diagram of Example 6 of the present utility model;

[0033] Figure 15 This is the motion resistance curve of the traditional fixed hanging piece.

[0034] Among them: 1. Frame; 2. Center shaft; 3. Position adjustment disk; 4. Lever; 5. Positioning hole; 6. Elastic latch; 7. Movable cover; 8. Hanging point rod; 9. Torque axis; 10. First connecting rod; 11. Second connecting rod; 12. Middle crossbeam; 13. Track; 14. Fixing hole; 15. Screw; 16. Training equipment; 17. Universal joint; 18. Rubber pad. DETAILED DESCRIPTION

[0035] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. Example 1

[0036] according to Figure 1 、 2 As shown in Figures 3 and 4, this embodiment proposes a counterweight device, including a frame 1 and a connecting rod mechanism. The frame 1 is provided with two left and right groups, and a central rotating shaft 2 is provided at the upper end of the outer side of the frame 1. A position adjustment disk 3 is provided on the inner side of the central rotating shaft 2, and a force arm 4 is provided on the outer side of the central rotating shaft 2. A positioning hole 5 is provided on one end of the disk surface of the position adjustment disk 3, and a plurality of groups of positioning holes 5 are provided at equal angles. An elastic pin 6 is provided in the middle of the arm body of the force arm 4, and the elastic pin 6 is adapted to the positioning hole 5. A movable cover 7 is provided on the front end slidingly of the force arm 4, and a hanging point rod 8 is provided on the outer side of the movable cover 7.

[0037] A torque shaft 9 is rotatably provided at the front end at the lower inner side of the frame 1, and the torque shaft 9 is used to connect the training equipment 16. The connecting rod mechanism includes a first connecting rod 10 and a second connecting rod 11. The outer side of the torque shaft 9 is connected to the first connecting rod 10, and one end of the first connecting rod 10 is hinged to the second connecting rod 11, and the upper end of the second connecting rod 11 is hinged to the inner middle end of the position adjustment disk 3. The upper structure of the frame 1 is bilaterally symmetrical. It can achieve unilateral torque output using a single side of the structure alone, or bilateral torque output by connecting the two sides in the middle to form an integral frame, meeting the functional requirements of single- and dual-action strength training equipment. A universal joint 17 connects the torque shaft 9 and the training device 16. The flexibility of the universal joint 17 allows for torque output in all directions, achieving a universal modular design for the plate-loaded counterweight device. Furthermore, the lever arm 4 is coaxially mounted on the central rotating shaft 2 with a position adjustment disk 3. The position adjustment disk 3 has a positioning hole 5 at a specific angle. The position adjustment disk 3 rotates around the central rotating shaft 2 at a fixed angle and transmits torque to the torque shaft 9 via a connecting rod structure. The lever arm 4 is connected to the positioning hole 5 via an elastic pin 6 and is also freely rotatable around the central rotating shaft 2. When the elastic pin 6 of the lever arm 4 is inserted into different positioning holes 5, the lever arm 4 has different starting angles, thereby obtaining different motion resistance curves, thereby providing the resistance curves required for variable resistance training (VRT) for training equipment with different functions. Advantages of Variable Resistance Training: More Effectively Stimulates Muscle Growth: By providing optimal resistance throughout the entire range of motion, VRT can more effectively stimulate muscle fibers and promote muscle growth. Improves Strength and Power: VRT can help athletes develop greater strength and power at specific joint angles. Reduces Injury Risk: VRT can reduce stress on joints, especially at the beginning and end of exercise, thereby reducing the risk of injury. More Challenging and Interesting: VRT can add interest and challenge to workouts and help people overcome training plateaus.

[0038] Intermediate crossbeams 12 connect the two sets of frames 1, and three sets of intermediate crossbeams 12 are provided. The two sets of frames 1 and the intermediate crossbeams 12 form a single structural frame, and rubber pads 18 are provided at the four corners of the bottom of the frame. The overall frame structure, combined with the rubber pads 18, ensures stable placement.

[0039] The front ends of the upper and lower parts of the lever arm 4 are both provided with tracks 13, and sliders are movably provided on the tracks 13 at the upper and lower parts, and the movable cover 7 is fixed to the sliders by bolts. The front end of the outer side of the lever arm 4 is provided with fixing holes 14, and multiple groups of fixing holes 14 are equidistantly provided. The internal thread of the hanging point rod 8 is installed with a screw 15, and the inner end of the screw 15 is adapted to the fixing hole 14. The hanging point rod 8 is used to install barbell plates. When in use, the barbell plates can be installed through the hanging point rod 8, the position of the barbell plates can be changed by sliding the movable cover 7, and the movable cover 7 can be fixed by snapping the screw 15 into the fixing hole 14 at the corresponding position. The lever arm 4 can be inserted into the positioning holes 5 at different angles through the elastic latch 6, so that the counterweight lever arm has different ranges of motion angles.

[0040] Both the position adjustment disk 3 and the lever arm 4 rotate about the central axis 2, but they rotate independently. The lever arm 4 is coaxially mounted on the central axis 2 with the position adjustment disk 3. The position adjustment disk 3 has a positioning hole 5 at a specific angle. The position adjustment disk 3 rotates about the central axis 2 at a fixed angle of motion, and torque is transmitted to the torque shaft 9 via a connecting rod structure. The lever arm 4 is connected to the positioning hole 5 via an elastic pin 6, and the lever arm 4 also rotates freely about the central axis 2. When the elastic pin 6 of the lever arm 4 is inserted into different positioning holes 5, the lever arm 4 will have different starting angles, thus obtaining different motion resistance curves.

[0041] The front end of the overall structural frame is used to install the training device 16, and the training device 16 is fixed to the middle crossbeam 12. The functional connection of the training device 16 is connected to the torque shaft 9 on both sides through a universal joint 17. Figure 4 As shown, taking the seated chest press strength training device as an example, the functional training frame portion of the seated chest press is installed on the universal resistance source counterweight frame through a connecting beam. The torque output of the resistance source counterweight arm 4 can be transmitted to the grip arm of the seated chest press strength training device through a universal joint 17, completing the assembly of the entire device. The universal joint 17 can achieve flexible output of the torque output direction of the resistance source counterweight frame to meet the needs of connecting strength training devices with different functions. The torque shaft 9 transmits the torque to the central rotating shaft 2 through the first connecting rod 10, the second connecting rod 11, and the position adjustment disk 3. When the first connecting rod 10 rotates counterclockwise around the torque shaft 9, the second connecting rod 11 drives the position adjustment disk 3 to rotate clockwise around the central rotating shaft 2. Example 2

[0042] according to Figure 5 、 6 As shown, this embodiment proposes a counterweight device with a lever arm length of 0.8m. Taking a 10kg barbell plate as an example, the torque formula τ=Frsinθ=m*g*r*sinθ is used. Substituting the motion angle range of 40°~90° into θ, the relationship curve between torque and angle (i.e., resistance curve) is as follows: Figure 5 、6 . Example 3

[0043] according to Figure 7 、 8 As shown, this embodiment proposes a counterweight device with a lever arm length of 0.8m. Taking a 10kg barbell plate as an example, the torque formula τ=Frsinθ=m*g*r*sinθ is used. Substituting the motion angle range of 52.5°~102.5° into θ, the relationship curve between torque and angle (i.e., resistance curve) is as follows: Figure 7 、 8 . Example 4

[0044] according to Figure 9 、 10 As shown, this embodiment proposes a counterweight device with a lever arm length of 0.8m. Taking a 10kg barbell plate as an example, the torque formula τ=Frsinθ=m*g*r*sinθ is used. Substituting the motion angle range of 65°~115° into θ, the relationship curve between torque and angle (i.e., resistance curve) is as follows: Figure 9 、 10 . Example 5

[0045] according to Figure 11 、 12 As shown, this embodiment proposes a counterweight device with a lever arm length of 0.8m. Taking a 10kg barbell plate as an example, the torque formula τ=Frsinθ=m*g*r*sinθ is used. Substituting the motion angle range of 77.5°~127.5° into θ, the relationship curve between torque and angle (i.e., resistance curve) is as follows: Figure 11 、 12 . Example 6

[0046] according to Figure 13 、 14 As shown, this embodiment proposes a counterweight device with a lever arm length of 0.8m. Taking a 10kg barbell plate as an example, the torque formula τ=Frsinθ=m*g*r*sinθ is used. Substituting the motion angle range of 90°~140° into θ, the relationship curve between torque and angle (i.e., resistance curve) is as follows: Figure 13 、 14 .

[0047] This counterweight device consists of a force arm 4 on a frame 1, a position adjustment disk 3 and a connecting rod mechanism. It can use a single-sided structure alone to achieve unilateral torque output, or it can connect the two sides in the middle to form an overall frame to achieve bilateral torque output, meeting the functional requirements of single and double actions in strength training equipment. The torque shaft 9 and the training equipment 16 are connected by a universal joint 17. The flexibility of the universal joint 17 is utilized to meet the output torque in all directions, realizing a universal modular design of the hanging plate counterweight device, making it suitable for different types of strength training equipment, and reducing manufacturing costs and use costs. In addition, the utility model coaxially installs the lever arm 4 and the position adjustment disk 3 on the central rotating shaft 2. There is a positioning hole 5 at a specific angle on the position adjustment disk 3. The position adjustment disk 3 rotates around the central rotating shaft 2 at a fixed motion angle, and transmits the torque to the torque shaft 9 through the connecting rod structure. At the same time, the lever arm 4 is connected to the positioning hole 5 through the elastic pin 6, and the lever arm 4 also rotates freely around the central rotating shaft 2. When the elastic pin 6 of the lever arm 4 is inserted into different positioning holes 5, the lever arm 4 will have different starting angles, and different motion resistance curves can be obtained, thereby providing the resistance curve required for variable resistance training (VRT) for training equipment with different functions. The theoretical basis of motion mechanics is: torque τ=Frsinθ. This device uses kinematics calculations and designs an adjustable counterweight device that conforms to the human body's biokinesiological resistance curve. It can achieve various training modes such as increasing resistance in the concentric contraction phase of muscles, decreasing resistance in the concentric contraction phase of muscles, increasing resistance in the eccentric contraction phase of muscles, and decreasing resistance in the eccentric contraction phase of muscles during strength training. Therefore, the strength trainer using this resistance source counterweight can provide users with richer and more efficient training content.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A counterweight device, characterized in that: include: A frame (1), wherein a central rotating shaft (2) is provided at an outer upper end of the frame (1); A central rotating shaft (2) is provided with a position adjustment disk (3) for rotation inside the central rotating shaft (2) and a force arm (4) for rotation outside the central rotating shaft (2). A positioning hole (5) is provided on the disk surface of the position adjustment disk (3). An elastic latch (6) is provided on the arm body of the force arm (4), and the elastic latch (6) is adapted to the positioning hole (5). A torque shaft (9) is rotatably arranged at the front end portion of the lower inner side of the frame (1); the inner side of the torque shaft (9) is connected to the training device (16) via a universal joint (17); and the outer side of the torque shaft (9) is connected to the position adjustment disk (3) via a connecting rod mechanism.

2. The counterweight device according to claim 1, characterized in that: The connecting rod mechanism comprises a first connecting rod (10) and a second connecting rod (11), the outer side of the torque shaft (9) is connected to the first connecting rod (10), one end of the first connecting rod (10) is hinged to the second connecting rod (11), and the upper end of the second connecting rod (11) is hinged to the inner middle end of the position adjustment disk (3).

3. The counterweight device according to claim 1, characterized in that: At least one group of the frames (1) is provided, an intermediate crossbeam (12) is connected between two groups of the frames (1), and at least one group of the intermediate crossbeam (12) is provided.

4. The counterweight device according to claim 3, characterized in that: The two groups of frames (1) and the middle crossbeam (12) form an integral structural frame, and a rubber pad (18) is provided at the bottom of the integral structural frame.

5. The counterweight device according to claim 4, characterized in that: The front end of the integral structural frame is used to install the training device (16), and the training device (16) is fixed to the middle crossbeam (12). The functional connection of the training device (16) is respectively connected to the torque shafts (9) on both sides through the universal joint (17).

6. The counterweight device according to claim 1, characterized in that: A movable cover (7) is slidably provided on the front end of the lever arm (4), and a hanging point rod (8) is provided on the outer side of the movable cover (7). Tracks (13) are provided at the upper and lower front ends of the lever arm (4), and sliders are movably provided on the upper and lower tracks (13). The movable cover (7) is fixed to the slider by bolts.

7. The counterweight device according to claim 6, characterized in that: The front end of the outer side of the lever arm (4) is provided with a fixing hole (14), and a plurality of fixing holes (14) are equidistantly provided. The internal thread of the hanging point rod (8) is provided with a screw rod (15), and the inner end of the screw rod (15) is adapted to the fixing hole (14). The hanging point rod (8) is used for installing a barbell plate.

8. The counterweight device according to claim 1, characterized in that: The position adjustment disk (3) and the force arm (4) both rotate around the central rotation axis (2), and the position adjustment disk (3) and the force arm (4) rotate independently.

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