An upper limb strength training device

Abstract

The utility model relates to physical training instrument technical field, concretely provides a kind of upper limb strength training device. Device includes shell, cover, vertical through shell and the pull rod of the center of cover, handle assembly being arranged in the upper end of pull rod, counterweight device and support being arranged in the lower end of pull rod;The inside cavity of shell is filled with spherical soft iron particle;Pull rod is fixed with piston mass block assembly in the inside cavity of shell;The side wall of piston mass block assembly and the inner wall of shell keep piston gap, and piston gap is greater than or equal to the diameter of a spherical soft iron particle;The outer wall of shell is provided with hinged shaft;Hinged shaft is hinged with support, and support supports shell to ensure that shell and counterweight device are suspended and rotate around hinged shaft. Through the design that shell can rotate around horizontal hinged shaft, the problem of the fixed angle of conventional equipment training is solved. User can adjust resistance direction according to training requirement, realizes multi-angle training.

Description

Technical Field

[0001] This utility model belongs to the field of sports training equipment technology, specifically relating to an upper limb strength training device. Background Technology

[0002] In the field of fitness and strength training, multi-angle, comprehensive training of upper limb muscle groups is key to improving athletic performance and preventing injuries. However, existing upper limb strength training equipment has significant shortcomings in this regard. The vast majority of equipment has a fixed training angle and resistance direction. For example, traditional dumbbells, barbells, and other free weights always have resistance directed vertically downwards, forcing users to train against gravity in only this fixed direction. This limits the training movements and the muscle groups stimulated, failing to simulate the multi-angle force exertion patterns in real life and hindering comprehensive functional training. While users can indirectly adjust this by changing their body position (e.g., using training benches at different angles), this is not only cumbersome but also doesn't change the direction of resistance provided by the equipment itself, significantly reducing training efficiency and targeting. Utility Model Content

[0003] The purpose of this invention is to provide an upper limb strength training device that allows users to conveniently adjust the direction of resistance. This enables a single device to simulate multiple movement force patterns, achieving more comprehensive and functional stimulation of the upper limb muscle groups.

[0004] This utility model discloses an upper limb strength training device, comprising an upright cylindrical shell, an openable cover located at the upper end of the shell, a pull rod vertically penetrating the center of the shell and the cover, a handle assembly located at the upper end of the pull rod, a counterweight device located at the lower end of the pull rod, and a bracket located on the side wall of the shell; the lower end of the shell is closed, and the upper end is open for engaging with the cover; the internal cavity of the shell is filled with spherical soft iron particles; the pull rod is in frictional engagement with the cover and the lower end of the shell; a piston-type mass block assembly is fixed to the pull rod within the internal cavity of the shell; the side wall of the piston-type mass block assembly maintains a piston gap with the inner wall of the shell, the piston gap being greater than or equal to the diameter of one of the spherical soft iron particles; a horizontal hinge shaft is radially arranged on the outer wall of the shell; the hinge shaft is hinged to the bracket, and the bracket supports the shell to ensure that the shell and the counterweight device are suspended and rotate around the hinge shaft.

[0005] Furthermore, the piston-type mass block assembly includes a first piston-type mass block and a second piston-type mass block spaced apart along the length of the pull rod; the pull rod is provided with a threaded section for threaded connection with the first piston-type mass block and the second piston-type mass block.

[0006] This staggered arrangement of the first and second piston-type mass blocks simulates greater resistance, ensuring balanced muscle stimulation throughout the training process and improving training efficiency. The threaded section on the pull rod allows for flexible disassembly and installation of both the first and second piston-type mass blocks, facilitating adaptation to different training needs.

[0007] Furthermore, the first piston-type mass block and the second piston-type mass block have different thicknesses.

[0008] Taking the example where the thickness of the first piston-type mass block is greater than that of the second piston-type mass block, the thinner second piston-type mass block allows particles to flow more easily through the piston gap, resulting in a gentler and smoother change in resistance, suitable for endurance training. The thicker first piston-type mass block increases the particle compression intensity and flow path, resulting in greater and more drastic resistance changes, suitable for explosive power training. This difference in thickness adjusts the cross-sectional area and inertia of particle flow to achieve nonlinear resistance output, allowing the device to adapt to different training objectives. Users can choose to install the first and second piston-type mass blocks according to their needs.

[0009] Furthermore, the counterweight device includes a counterweight support plate, a support side plate, an inner support connecting assembly, and a counterweight block; the counterweight support plate is fixed to the lower end of the pull rod; the support side plates are concentrically arranged around the pull rod with different diameters, the support side plates are semi-cylindrical structures, the lower end of the support side plates is fixed to the counterweight support plate, and the upper end is connected to the pull rod through the inner support connecting assembly; the side wall of the counterweight block is provided with a notch for the pull rod to be inserted laterally, and the counterweight block is placed on the counterweight support plate.

[0010] The support side plate restricts the lateral displacement of the counterweight, preventing it from falling off during training; the inner support connecting assembly connects the upper part of the support side plate to the pull rod, distributing the load. This structure makes resistance adjustment convenient and safe. Users do not need to laboriously install or remove the counterweight from the top of the pull rod; they can simply insert it laterally. The operation is simple and avoids the risk of pinching injuries, solving the problem of inconvenient traditional counterweight adjustment.

[0011] Furthermore, the counterweight has a disc-shaped structure, and the diameter of the notch gradually increases from the center of the counterweight toward the sidewall.

[0012] The counterweight has a disc-shaped structure, and the diameter of the notch gradually increases from the center towards the sidewall, i.e., a gradually expanding notch. This design utilizes the principle of inclined planes, making it easier for the pull rod to be inserted into the counterweight from the side. The gradually expanding notch reduces friction and resistance during assembly, improving operational smoothness and user experience.

[0013] Furthermore, there are multiple counterweights.

[0014] Furthermore, the inner support connection assembly includes a fixing ring and multiple support ribs. The fixing ring is fixedly fitted onto the side wall of the pull rod, and the multiple support ribs are spaced apart circumferentially along the fixing ring. One end of each support rib is fixedly connected to the fixing ring, and the other end is fixedly connected to the support side plate.

[0015] The support ribs act as reinforcing ribs, improving the fatigue life of the support side plates, preventing deformation or breakage during high-intensity training, and ensuring the durability and safety of the device.

[0016] Furthermore, the handle assembly includes a main handle and two auxiliary handles; the main handle is disposed at the upper end of the pull rod; the two auxiliary handles are symmetrically disposed on both sides of the pull rod.

[0017] When training with one hand, the main handle provides concentrated resistance, working muscles on one side, such as the biceps; when training with both hands, the auxiliary handle allows for simultaneous or asynchronous pulling, training coordination and compound muscle groups, such as the latissimus dorsi and shoulders. Switching modes requires no tools, enhancing equipment functionality and training versatility.

[0018] Furthermore, a base plate is provided at the lower end of the bracket, and the base plate is fixed to the ground by bolts.

[0019] Furthermore, the outer wall of the pull rod is provided with a wear-resistant rubber layer; the center of the cover and the lower center of the outer shell are both provided with through holes for the pull rod to pass through, and the inner wall of the through hole is in frictional engagement with the wear-resistant rubber layer.

[0020] The wear-resistant rubber layer provides additional damping through its high coefficient of friction, making the movement of the rod smoother, reducing noise and wear caused by direct metal-to-metal contact, and improving device reliability and user experience.

[0021] The beneficial effects of this invention include: The design of the outer shell, which can rotate around a horizontal hinge axis, solves the problem of fixed training angles in traditional equipment. The outer shell is hinged to the support via the hinge axis, allowing it to tilt freely. Users can adjust the resistance direction according to training needs, such as vertical, forward tilt, or backward tilt, to achieve multi-angle training. For example, vertical pulling trains the latissimus dorsi, forward tilt simulates rowing, and backward tilt trains the deltoids. Simultaneously, the outer shell is filled with spherical soft iron particles, and a piston-type mass block assembly is installed on the pull rod. When the pull rod moves, the mass block compresses the particles, causing them to flow through the piston gap, generating nonlinear resistance positively correlated with the movement speed. The viscous resistance and internal friction resistance of the particle flow increase with increasing speed, while the inertial force of the mass block also contributes to the resistance, enhancing the training effect of explosive power and endurance. Furthermore, the damping characteristics of the particle medium make the movement smooth, reducing impact and vibration, and improving safety. Attached Figure Description

[0022] Figure 1This is a three-dimensional structural diagram of the upper limb strength training device of this utility model; Figure 2 for Figure 1 A schematic diagram of the structure behind the hidden support; Figure 3 This is a schematic diagram of the cross-sectional structure of the outer shell; Figure 4 This is a three-dimensional structural diagram of the counterweight device.

[0023] In the diagram: 1-Outer shell; 2-Pull rod; 3-Cover; 4-Main handle; 5-Secondary handle; 6-Counterweight device; 61-Counterweight support plate; 62-Supporting side plate; 63-Counterweight block; 64-Notch; 65-Fixing ring; 66-Supporting rib; 7-Bracket; 8-Hinge shaft; 9-Spherical soft iron particle; 10-First piston-type mass block; 11-Second piston-type mass block; 12-Piston gap; 13-Base plate. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments: like Figures 1-4 As shown, the upper limb strength training device of this utility model includes a cylindrical shell 1, a cover 3, a pull rod 2, a handle assembly, a counterweight device 6, and a support 7.

[0025] The outer shell 1 is made of aluminum alloy, with an inner diameter of 150mm, a height of 600mm, and a wall thickness of 5mm. The internal cavity of the outer shell 1 is filled with spherical soft iron particles 9 to a height of 400-500mm. The spherical soft iron particles 9 have a diameter of 3mm and are coated with a Teflon coating, providing good flowability and wear resistance.

[0026] The bottom of the outer casing 1 is sealed by welding a circular aluminum plate, and a through hole for the pull rod 2 to pass through is provided in the center of the aluminum plate. The top of the outer casing 1 is open, and the top edge is threaded for threaded connection with the cover 3. The center of the cover 3 is also provided for the pull rod 2 to pass through. By opening the cover 3, it is easy to replace or replenish the spherical soft iron particles 9 inside the outer casing 1.

[0027] The pull rod 2 is made of 304 stainless steel, with a diameter of 20mm and a wear-resistant rubber layer on its surface. It also has multiple threaded sections for threaded connection with the first piston-type mass block 10 and the second piston-type mass block 11. After the pull rod 2 is threadedly connected to the first piston-type mass block 10 and the second piston-type mass block 11, it is placed inside the outer casing 1, with the lower end of the pull rod 2 passing through the through hole at the bottom of the outer casing 1. Then, the cover 3 is placed on top, with the upper end of the pull rod 2 passing through the through hole in the cover 3.

[0028] The first mass block has a thickness of 100 mm, the second mass block has a thickness of 40 mm, and the distance between them is 200 mm. The mass blocks are made of brass or steel, with an outer diameter of 144 mm, and maintain a piston gap 12 of 3 mm with the inner wall of the outer shell 1. This gap is slightly larger than the diameter of the spherical soft iron particles 9 to ensure that the particles can flow in the gap.

[0029] The handle assembly includes a main handle 4 and two auxiliary handles 5. The main handle 4 is a circular grip, 35mm in diameter and 120mm in length, with a rubber anti-slip texture on its surface. An end cap is fixed to the lower end of the main handle 4, threaded onto the upper end of the pull rod 2, allowing for easy installation and removal of the main handle 4 from the pull rod 2. The auxiliary handles 5 are also circular grips with ergonomic finger grooves on their surface. The two auxiliary handles 5 are symmetrically fixed to both sides of the end cap at the lower end of the main handle 4, and are also distributed on both sides of the pull rod 2.

[0030] The bracket 7 is connected to the outer casing 1 via a horizontal hinge shaft 8, allowing the outer casing 1 to rotate in a vertical plane around the hinge shaft 8. A base plate 13 is welded to the lower end of the bracket 7, and the base plate 13 is fixed to the ground by bolts.

[0031] like Figure 4 As shown, the counterweight device 6 includes a counterweight support plate 61, a support side plate 62, an inner support connecting assembly, and a counterweight block 63.

[0032] The counterweight plate 61 is fixed to the lower end of the pull rod 2; the support side plate 62 is set concentrically on the periphery of the pull rod 2 with different diameters. The support side plate 62 has a semi-cylindrical structure. The lower end of the support side plate 62 is fixed to the counterweight plate 61, and the upper end is connected to the pull rod 2 through the inner support connecting assembly; the side wall of the counterweight block 63 is provided with a notch 64 for the pull rod 2 to be inserted from the side, and the counterweight block 63 is placed on the counterweight plate 61.

[0033] The counterweight 63 has a disc-like structure, and the diameter of the notch 64 gradually increases from the center of the counterweight 63 towards the side wall. There are multiple counterweights 63. Multiple counterweights 63 can be configured with different masses and have weight markings on their surfaces, and can also have different color markings on their side walls.

[0034] The inner support connection assembly includes a fixing ring 65 and multiple support ribs 66. The fixing ring 65 is fixedly fitted onto the side wall of the tie rod 2. The multiple support ribs 66 are spaced apart circumferentially along the fixing ring 65. One end of the support rib 66 is fixedly connected to the fixing ring 65, and the other end is fixedly connected to the support side plate 62.

[0035] When training, users can choose between single-handed or two-handed training modes as needed. For single-handed training, hold the main handle 4; for two-handed training, hold each of the two auxiliary handles 5.

[0036] When the user pulls lever 2 upwards, the first piston-type mass block 10 and the second piston-type mass block 11 fixed thereon move upwards within the outer casing 1, compressing the spherical soft iron particles 9 above. Under the compression of the first piston-type mass block 10 and the second piston-type mass block 11, the spherical soft iron particles 9 flow, with some flowing downwards from the piston gap 12. The flow resistance of the spherical soft iron particles 9 (hereinafter also referred to as particles) is related to the movement speed; the faster the speed, the greater the resistance, forming a resistance characteristic positively correlated with speed.

[0037] Meanwhile, the first piston-type mass block 10 and the second piston-type mass block 11, with different thicknesses, produce different resistance characteristics. When the thinner second piston-type mass block 11 moves, particles flow more easily through the gaps, resulting in relatively small and gradual resistance; when the thicker first piston-type mass block 10 moves, the particle flow path is longer, resulting in greater resistance and more significant changes. The combination of the first piston-type mass block 10 and the second piston-type mass block 11 with different thicknesses makes the resistance change more smooth and natural throughout the entire movement stroke.

[0038] Users can change the basic resistance level by adjusting the number of counterweights 63, and change the resistance direction by adjusting the tilt angle of the outer shell 1, to adapt to different training needs.

[0039] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. An upper limb strength training device, characterized in that, The device includes an upright cylindrical outer shell, an openable cover located at the top of the outer shell, a vertically extending pull rod penetrating the center of the outer shell and the cover, a handle assembly located at the top of the pull rod, a counterweight device located at the bottom of the pull rod, and a bracket located on the side wall of the outer shell. The lower end of the outer shell is closed, and the upper end is open for engaging with the cover. The internal cavity of the outer shell is filled with spherical soft iron particles. The pull rod engages with the cover and the lower end of the outer shell through friction. A piston-type mass block assembly is fixed to the pull rod within the internal cavity of the outer shell. The side wall of the piston-type mass block assembly maintains a piston gap with the inner wall of the outer shell, and the piston gap is greater than or equal to the diameter of one of the spherical soft iron particles. A horizontal hinge shaft is radially arranged on the outer wall of the outer shell. The hinge shaft is hinged to the bracket, and the bracket supports the outer shell to ensure that the outer shell and the counterweight device are suspended and rotate around the hinge shaft.

2. The upper limb strength training device according to claim 1, characterized in that, The piston-type mass block assembly includes a first piston-type mass block and a second piston-type mass block spaced apart along the length of the pull rod; the pull rod is provided with a threaded section for threaded connection with the first piston-type mass block and the second piston-type mass block.

3. The upper limb strength training device according to claim 2, characterized in that, The first piston-type mass block and the second piston-type mass block have different thicknesses.

4. The upper limb strength training device according to claim 1, characterized in that, The counterweight device includes a counterweight support plate, a support side plate, an inner support connecting assembly, and a counterweight block; the counterweight support plate is fixed to the lower end of the pull rod; the support side plate is concentrically arranged on the periphery of the pull rod with different diameters, the support side plate is a semi-cylindrical structure, the lower end of the support side plate is fixed to the counterweight support plate, and the upper end is connected to the pull rod through the inner support connecting assembly; the side wall of the counterweight block is provided with a notch for the pull rod to be inserted from the side, and the counterweight block is placed on the counterweight support plate.

5. The upper limb strength training device according to claim 4, characterized in that, The counterweight has a disc-shaped structure, and the diameter of the notch gradually increases from the center of the counterweight toward the sidewall.

6. The upper limb strength training device according to claim 4, characterized in that, There are multiple counterweights.

7. The upper limb strength training device according to claim 4, characterized in that, The inner support connection assembly includes a fixing ring and multiple support ribs. The fixing ring is fixedly fitted onto the side wall of the pull rod. The multiple support ribs are spaced apart circumferentially along the fixing ring. One end of each support rib is fixedly connected to the fixing ring, and the other end is fixedly connected to the support side plate.

8. The upper limb strength training device according to claim 1, characterized in that, The handle assembly includes a main handle and two auxiliary handles; the main handle is located at the upper end of the pull rod; the two auxiliary handles are symmetrically arranged on both sides of the pull rod.

9. The upper limb strength training device according to claim 1, characterized in that, The lower end of the bracket is provided with a base plate, which is fixed to the ground by bolts.

10. The upper limb strength training device according to claim 1, characterized in that, The outer wall of the pull rod is provided with a wear-resistant rubber layer; the center of the cover and the lower center of the outer shell are both provided with through holes for the pull rod to pass through, and the inner wall of the through hole is in frictional fit with the wear-resistant rubber layer.

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