Dual cable exercise device

Abstract

This invention discloses a dual-cable fitness device, comprising a frame, a first reel, and a second reel. The first and second reels are rotatably connected to the frame, with a first cable and a second cable respectively connected to them. The frame is equipped with a power source mechanism providing forward resistance and reverse return force to the first and second reels. A differential mechanism is also provided between the first and second reels. Driven by the first and second cables, the first and second reels are configured to rotate synchronously or asynchronously relative to the frame through the differential mechanism. The ability of the first and second cables to move synchronously or asynchronously through the differential mechanism better meets diverse training needs, improves user experience, and enhances the market competitiveness of this fitness device.

Description

Technical Field

[0001] This invention relates to the field of fitness equipment technology, specifically to a double-cable fitness device. Background Technology

[0002] Chinese document CN211132850U (application date: September 5, 2019) discloses a strength training device, comprising a motor, an angle sensor, a control board, a power supply, and a training component. The motor serves as the resistance source, providing training resistance, and its output shaft is connected to the training component. The angle sensor is used to collect the angle of the motor drive shaft in real time. The power supply is connected to the motor, angle sensor, and control board, providing power to all three components. The control board is connected to both the motor and angle sensor, receiving and processing signals from the angle sensor to control the motor and provide the required resistance for training. This fitness device uses a motor as the resistance source, allowing for stepless adjustment of the resistance. Compared to heavy and bulky metal blocks, it is small in size and easy to adjust. By monitoring the angular velocity of the cable disc with the angle sensor, the motor can be controlled, thus controlling the resistance or recovery force, resulting in good safety. However, this fitness device is a single-cable structure, resulting in a relatively limited training method that may not meet the diverse strength training needs of users. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a dual-cable fitness device, which mainly solves the technical problem that existing single-cable strength training devices have a relatively simple training method and are difficult to meet the diverse strength training needs of users.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: A dual-cable fitness device includes a frame, a first reel and a second reel. The first and second reels are rotatably connected to the frame from left to right. A first cable and a second cable are respectively connected to the first and second reels. The frame is equipped with a power source mechanism that provides forward resistance and reverse reset force to the first and second reels. A differential mechanism is also provided between the first and second reels. Driven by the first and second cables, the first and second reels are configured to rotate synchronously or asynchronously relative to the frame through the action of the differential mechanism.

[0005] Furthermore, the power source mechanism includes a spindle, a sleeve sleeved on the spindle, and a power mechanism located between the spindle and the sleeve. The power mechanism is configured to generate forward rotation resistance to the forward rotation of the sleeve relative to the spindle and to generate reverse rotation restoring force to the reverse rotation of the sleeve relative to the spindle. The spindle is laterally fixedly connected to the frame. The first take-up reel and the second take-up reel are rotatably sleeved on the spindle from left to right. The sleeve is provided with at least one shaft to form a planetary support structure for the differential mechanism. The differential mechanism also includes a first side gear, a second side gear, and at least one first planetary gear. The first side gear and the second side gear are respectively located on the inner sides of the first take-up reel and the second take-up reel opposite to each other. The first planetary gear is rotatably connected to the support shaft and simultaneously meshes with the first side gear and the second side gear to form the differential structure.

[0006] Furthermore, the sleeve is provided with two vertically opposite support shafts, and the differential mechanism also includes a second planetary gear. The first planetary gear and the second planetary gear are rotatably connected to the two support shafts of the sleeve, and both the first planetary gear and the second planetary gear maintain meshing with the first side gear and the second side gear simultaneously.

[0007] Furthermore, the power mechanism can be a motor mechanism, a coil spring, or a torsion spring.

[0008] Furthermore, the sleeve is located on the mandrel between the first take-up reel and the second take-up reel.

[0009] Furthermore, the power source mechanism includes a power structure and a drive shaft that is laterally rotatably connected to the frame. The first take-up reel and the second take-up reel are rotatably sleeved on the drive shaft relative to each other. A vertical support rod is provided on the drive shaft between the first take-up reel and the second take-up reel to form a planetary support structure for the differential mechanism. The differential mechanism also includes a first side gear, a second side gear, and at least one first planetary gear. The first side gear and the second side gear are respectively located on the inner sides of the first take-up reel and the second take-up reel opposite to each other. The first planetary gear is rotatably connected to the support rod and simultaneously meshes with the first side gear and the second side gear to form the differential structure. The power structure is fixedly connected to the frame and is connected to the drive shaft to provide forward rotation resistance and reverse rotation reset force for the rotation of the drive shaft relative to the frame, thereby indirectly providing forward rotation resistance and reverse rotation reset force for the first take-up reel and the second take-up reel.

[0010] Furthermore, the support rod and the drive shaft are arranged in a cross shape, and the differential mechanism also includes a second planetary gear. The first planetary gear and the second planetary gear are rotatably connected to the two ends of the support rod, and both the first planetary gear and the second planetary gear are simultaneously engaged with the first side gear and the second side gear.

[0011] Furthermore, the power structure is a drive motor, torsion spring structure, or coil spring structure that can provide forward rotation resistance and reverse rotation reset force for the rotation of the drive shaft relative to the frame.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] In the double-cable fitness device of this invention, two opposing first and second take-up reels are arranged on the frame, with a first cable and a second cable respectively connected to the first and second take-up reels, thus forming a double-cable structure. Simultaneously, a power source mechanism is provided on the frame to provide forward rotation resistance and reverse return force to the first and second take-up reels. This configuration allows the first and second cables to drive the first and second take-up reels to overcome the forward rotation resistance of the power source mechanism for forward rotational strength training. When the first and second cables are released, the reverse return force provided by the power source mechanism automatically reverses the direction of rotation of the first and second take-up reels. Furthermore, since a differential mechanism is also provided between the first and second take-up reels, the first and second cables can move synchronously or asynchronously on the frame using the differential principle. That is, the first and second cables can be pulled out synchronously, and the power source mechanism acts on both the first and second take-up reels simultaneously, providing them with forward rotation resistance and reverse rotation reset force. Alternatively, when the first cable is pulled out, the differential action of the differential mechanism allows the second cable to remain stationary or be pulled out slowly. In this way, the dual-cable fitness device can perform various strength training methods, better meet the diverse training needs of customers, improve the user experience, and enhance the market competitiveness of the fitness device product. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the double-cable fitness device according to Embodiment 1 of the present invention.

[0015] Figure 2 This is a partial structural exploded view of the double-cable fitness device according to Embodiment 1 of the present invention.

[0016] Figure 3 This is a schematic diagram of one of the power source mechanisms of Embodiment 1 of the present invention.

[0017] Figure 4 This is another structural schematic diagram of the power source mechanism according to Embodiment 1 of the present invention.

[0018] Figure 5 This is a three-dimensional structural diagram of the double-cable fitness device according to Embodiment 2 of the present invention.

[0019] Figure 6 This is a partial structural exploded view of the double-cable fitness device according to Embodiment 2 of the present invention.

[0020] Label Explanation:

[0021] 1. Frame, 2. First take-up reel, 3. Second take-up reel, 4. Power source mechanism, 5. Differential mechanism, 21. First cable, 31. Second cable, 41. Spindle, 42. Sleeve, 43. Power mechanism, 44. Support shaft, 45. Power structure, 46. Drive shaft, 47. Support rod, 51. First side gear, 52. Second side gear, 53. First planetary gear, 54. Second planetary gear. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0024] Example 1

[0025] Please refer to the appendix. Figure 1 To be continued Figure 4An embodiment of the present invention provides a dual-cable fitness device, including a frame 1, a first take-up reel 2 and a second take-up reel 3. The first take-up reel 2 and the second take-up reel 3 are rotatably connected to the frame 1 from left to right. A first cable 21 and a second cable 31 are respectively connected to the first take-up reel 2 and the second take-up reel 3. The frame 1 is provided with a power source mechanism 4 for providing forward rotation resistance and reverse rotation reset force to the first take-up reel 2 and the second take-up reel 3. A differential mechanism 5 is also provided between the first take-up reel 2 and the second take-up reel 3. Driven by the first cable 21 and the second cable 31, the first take-up reel 2 and the second take-up reel 3 are configured to rotate synchronously or asynchronously relative to the frame 1 through the action of the differential mechanism 5. Understandably, in this embodiment, two opposing first take-up reels 2 and second take-up reels 3 are provided on the frame 1, and a first cable 21 and a second cable 31 are respectively connected to the first take-up reels 2 and 3, thus forming a double cable structure. Simultaneously, a power source mechanism 4 is provided on the frame 1, which provides forward rotation resistance and reverse return force to the first take-up reels 2 and 3. This configuration allows the first cable 21 and the second cable 31 to drive the first take-up reels 2 and 3 to overcome the forward rotation resistance of the power source mechanism 4 for forward rotation training. When the first cable 21 and the second cable 31 are released, the reverse return force provided by the power source mechanism 4 can drive the first take-up reels 2 and 3. The device features automatic reverse reset. Furthermore, a differential mechanism 5 is installed between the first take-up reel 2 and the second take-up reel 3. Utilizing the differential principle, the first cable 21 and the second cable 31 can move synchronously or asynchronously on the frame 1. That is, the first cable 21 and the second cable 31 can be pulled out synchronously, and the power source mechanism 4 simultaneously acts on the first take-up reel 2 and the second take-up reel 3, providing them with forward rotation resistance and reverse reset force. Alternatively, when the first cable 21 is pulled out, the differential action of the differential mechanism 5 allows the second cable 31 to remain stationary or be pulled out slowly. In this way, the dual-cable fitness device can perform various strength training methods, better meet the diverse training needs of customers, improve the user experience, and enhance the market competitiveness of the fitness device product.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 4In one preferred embodiment, the power source mechanism 4 includes a spindle 41, a sleeve 42 sleeved on the spindle 41, and a power mechanism 43 disposed between the spindle 41 and the sleeve 42. The power mechanism 43 is configured to generate forward rotation resistance to the forward rotation of the sleeve 42 relative to the spindle 41 and to generate reverse rotation restoring force to the reverse rotation of the sleeve 42 relative to the spindle 41. The spindle 41 is laterally fixedly connected to the frame 1. The first take-up reel 2 and the second take-up reel 3 are rotatably sleeved on the spindle 41 relative to each other. The sleeve 42 is provided with at least one shaft 44 to form a planetary support structure of the differential mechanism 5. The differential mechanism 5 also includes a first side gear 51, a second side gear 52, and at least one first planetary gear 53. The first side gear 51 and the second side gear 52 are respectively disposed on the inner sides of the first take-up reel 2 and the second take-up reel 3. The first planetary gear 53 is rotatably connected to the support shaft 44 and simultaneously meshes with the first side gear 51 and the second side gear 52 to form a differential structure. In one preferred embodiment, the sleeve 42 is preferably provided with two vertically opposite support shafts 44. The differential mechanism 5 further includes a second planetary gear 54. The first planetary gear 53 and the second planetary gear 54 are respectively rotatably connected to the two support shafts 44 of the sleeve 42, and both the first planetary gear 53 and the second planetary gear 54 maintain meshing with the first side gear 51 and the second side gear 52 simultaneously. However, those skilled in the art should understand that other numbers of planetary gears can also be provided between the first side gear 51 and the second side gear 52, and are not limited to providing one first planetary gear 53 between the first side gear 51 and the second side gear 52, or providing the first planetary gear 53 and the second planetary gear 54 arranged vertically opposite each other between the first side gear 51 and the second side gear 52 as disclosed in this embodiment. For example, in other embodiments, three or more planetary gears can also be provided between the first side gear 51 and the second side gear 52, as long as each planetary gear connected between the first side gear 51 and the second side gear 52 can cooperate with the first side gear 51 and the second side gear 52 to form a differential structure. Understandably, in this embodiment, when the first cable 21 and the second cable 31 are pulled out synchronously, the first take-up reel 2 and the second take-up reel 3 rotate synchronously, causing the first side gear 51, the second side gear 52, the first planetary gear 53, and the second planetary gear 54 in the differential mechanism 5 to cooperate and form a locked state (the working principle of the differential mechanism 5 is similar to that of a car differential, which is existing technology and will not be described in detail here). Therefore, the rotation of the first take-up reel 2 and the second take-up reel 3 drives the sleeve 42 to rotate synchronously to overcome the forward rotation resistance. When the user releases the pulling force, under the action of the reverse reset force provided by the power source mechanism 4, the sleeve 42 reverses, and then drives the first take-up reel 2 and the second take-up reel 3 to rotate synchronously through the locked differential mechanism 5, so that the first cable 21 and the second cable 31 are taken in, thus forming a synchronous movement state of the first take-up reel 2 and the second take-up reel 3.When training is performed with the first cable 21 extended and the second cable 31 not extended, the first take-up reel 2 rotates. Under the action of the differential mechanism 5, the first take-up reel 2, the first side gear 51, the first planetary gear 53, and the second planetary gear 54 move synchronously with the sleeve 42, while the second take-up reel 3 remains stationary. This creates a asynchronous motion state between the first and second take-up reels 2 and 3. During take-up, under the action of the reversing reset force provided by the power source mechanism 4, the first take-up reel 2, the first side gear 51, the first planetary gear 53, and the second planetary gear 54 move synchronously in the opposite direction with the sleeve 42 to achieve a reverse reset. Similarly, asynchronous training can also be performed with the second cable 31 extended and the first cable 21 not extended. In addition, damping structures can be set between the first take-up reel 2 and the spindle 41, and between the second take-up reel 3 and the spindle 41, so that the first take-up reel 2 or the second take-up reel 3 can remain more stably stationary relative to the spindle 41 or the frame 1 when not rotating.

[0027] Please refer to the appendix. Figure 3 Appendix Figure 4 In one preferred embodiment, the power mechanism 43 is a motor mechanism, a coil spring, or a torsion spring. It is understood that when the power mechanism 43 is a motor mechanism, the power source mechanism 4 is a dual-axis motor. The outer casing of the dual-axis motor is equivalent to the sleeve 42, and the rotating shaft of the dual-axis motor is equivalent to the spindle 41. The two ends of the rotating shaft of the dual-axis motor are fixedly connected to the frame 1. When the motor is started, since the rotating shaft is fixed to the frame 1, the outer casing (sleeve 42) of the dual-axis motor will rotate. Furthermore, to achieve stepless adjustment of the forward rotation resistance and reverse reset force of the sleeve 42, the power source mechanism 4 can also be configured with reference to existing technologies such as the corresponding control board and angle sensor structure in CN211132850U. Its adjustment principle and control circuit are existing technologies and can be designed with reference to existing technologies, and will not be elaborated here. When the power mechanism 43 uses a coil spring, one end of the coil spring is connected to the spindle 41 and the other end is connected to the sleeve 42. When the sleeve 42 rotates forward relative to the spindle 41 under the drive of the cable, the coil spring tightens, generating forward rotation resistance on the sleeve 42 and increasing the reverse reset force. Similarly, when the power mechanism 43 uses a torsion spring, preferably, the torsion spring is sleeved on the spindle 41, with one end of the torsion spring connected to the spindle 41 and the other end connected to the sleeve 42.

[0028] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the sleeve 42 is disposed on the spindle 41 between the first take-up reel 2 and the second take-up reel 3. It is understood that, in this embodiment, disposing the sleeve 42 on the spindle 41 between the first take-up reel 2 and the second take-up reel 3 helps to further make the overall structure of the double-cable fitness device more compact.

[0029] Example 2

[0030] Please refer to the appendix. Figure 5 Appendix Figure 6 The difference between this embodiment and Embodiment 1 is that the power source mechanism 4 includes a power structure 45 and a drive shaft 46 laterally rotatably connected to the frame 1. The first take-up reel 2 and the second take-up reel 3 are rotatably sleeved on the drive shaft 46 relative to each other. A vertical support rod 47 is provided on the drive shaft 46 between the first take-up reel 2 and the second take-up reel 3 to form the planetary support structure of the differential mechanism 5. The differential mechanism 5 also includes a first side gear 51, a second side gear 52, and at least one first planetary gear 53. The first side gear 51 and the second side gear 52 are... Two side gears 52 are respectively located on the inner sides of the first take-up reel 2 and the second take-up reel 3. The first planetary gear 53 is rotatably connected to the support rod 47 and simultaneously meshes with the first side gear 51 and the second side gear 52 to form a differential structure. The power structure 45 is fixedly connected to the frame 1 and is connected to the drive shaft 46 to provide forward rotation resistance and reverse rotation reset force for the rotation of the drive shaft 46 relative to the frame 1, thereby indirectly providing forward rotation resistance and reverse rotation reset force for the first take-up reel 2 and the second take-up reel 3.

[0031] Please refer to the appendix. Figure 5 Appendix Figure 6 In one preferred embodiment, the support rod 47 and the drive shaft 46 are arranged in a cross shape. The differential mechanism 5 also includes a second planetary gear 54. The first planetary gear 53 and the second planetary gear 54 are rotatably connected to both ends of the support rod 47, and both the first planetary gear 53 and the second planetary gear 54 are simultaneously engaged with the first side gear 51 and the second side gear 52. In this embodiment, the difference from Embodiment 1 is that the drive shaft 46 is rotatably connected to the frame 1, while the spindle 41 in Embodiment 1 is fixedly connected to the frame 1, and the first planetary gear 53 and the second planetary gear 54 are connected to the drive shaft 46, while in Embodiment 1, the first planetary gear 53 and the second planetary gear 54 are connected to the sleeve 42. However, the working principle of the differential mechanism 5 in Embodiment 1 and Embodiment 2 is the same.

[0032] Please refer to the appendix. Figure 5 Appendix Figure 6 In one preferred embodiment, the power structure 45 is a drive motor, torsion spring structure, or coil spring structure that can provide forward rotation resistance and reverse rotation reset force for the rotation of the drive shaft 46 relative to the frame 1.

[0033] In addition, a damping structure can be provided between the first take-up reel 2 and the frame 1 and between the second take-up reel 3 and the frame 1, so that the first take-up reel 2 or the second take-up reel 3 can remain more stable relative to the drive shaft 46 or the frame 1 when it is not rotating.

[0034] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features therein. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

Claims

1. A double-cable fitness device, characterized in that... The device includes a frame (1), a first take-up reel (2), and a second take-up reel (3). The first take-up reel (2) and the second take-up reel (3) are rotatably connected to the frame (1) from left to right. A first cable (21) and a second cable (31) are respectively connected to the first take-up reel (2) and the second take-up reel (3). The frame (1) is equipped with a power source mechanism (4) for providing forward rotation resistance and reverse rotation reset force to the first take-up reel (2) and the second take-up reel (3). A differential mechanism (5) is also provided between the reels (3). Driven by the first cable (21) and the second cable (31), the first take-up reel (2) and the second take-up reel (3) are configured to rotate synchronously or asynchronously relative to the frame (1) through the action of the differential mechanism (5). The power source mechanism (4) includes a power structure (45) and a drive shaft (46) that is laterally rotatably connected to the frame (1). The first take-up reel (2) and the second take-up reel (3) are rotatably sleeved on each other. On the drive shaft (46), a vertical support rod (47) is provided on the drive shaft (46) between the first take-up reel (2) and the second take-up reel (3) to form the planetary support structure of the differential mechanism (5). The differential mechanism (5) also includes a first side gear (51), a second side gear (52) and at least one first planetary gear (53). The first side gear (51) and the second side gear (52) are respectively located on the inner sides of the first take-up reel (2) and the second take-up reel (3). The star gear (53) is rotatably connected to the support rod (47) and simultaneously meshes with the first side gear (51) and the second side gear (52) to form a differential structure. The power structure (45) is fixedly connected to the frame (1) and is connected to the drive shaft (46) to provide forward rotation resistance and reverse rotation reset force for the rotation of the drive shaft (46) relative to the frame (1), thereby indirectly providing forward rotation resistance and reverse rotation reset force for the first take-up reel (2) and the second take-up reel (3). The support rod (47) and the drive shaft (46) are in a cross shape. The differential mechanism (5) also includes a second planetary gear (54). The first planetary gear (53) and the second planetary gear (54) are rotatably connected to the two ends of the support rod (47), and the first planetary gear (53) and the second planetary gear (54) are simultaneously meshed with the first side gear (51) and the second side gear (52). The power structure (45) is a drive motor, torsion spring structure or coil spring structure that can provide forward rotation resistance and reverse rotation reset force for the rotation of the drive shaft (46) relative to the frame (1).

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