Resistance transmission device and fitness equipment

Abstract

The application provides a resistance transmission device and fitness equipment, the resistance transmission device comprising: a driving source, a gear box, a rotating shaft, a wire arranging device and a screw rod; the gear box comprises a driving gear and a driven gear, the driving gear is in transmission connection with an output shaft of the driving source, the driven gear is in meshing with the driving gear, and a threaded hole is formed in the center of the driven gear; the rotating shaft is located on the side of the gear box away from the driving source, the rotating shaft is in transmission connection with the output shaft of the driving source, and the outer periphery of the rotating shaft is used for winding a pull rope; the wire arranging device is arranged close to the rotating shaft, and the wire arranging device is matched with the leading end of the pull rope to guide the winding and unwinding of the pull rope; the screw rod is parallel to the rotating shaft, one end of the screw rod is connected with the wire arranging device, and the other end of the screw rod is inserted into the threaded hole of the driven gear. Through the cooperation of the gear box and the screw rod, the wire arranging device is driven to move axially, the pull rope is guided to be arranged in order, and problems such as stacking and knotting of the pull rope are avoided.

Description

Technical Field

[0001] This application belongs to the field of fitness equipment technology, and in particular relates to a resistance transmission device and fitness equipment. Background Technology

[0002] Among various fitness equipment, rope-based strength training devices have become mainstream products in the market due to their flexible training modes and portability. Traditional rope training equipment provides training resistance to users through pulley systems, ropes, and resistance bands to meet their training needs. With the intelligent development of fitness equipment, some devices have introduced motor-driven systems to achieve dynamic resistance adjustment, providing more diverse training modes and significantly improving the user experience.

[0003] However, in the aforementioned motor-driven equipment, the pull rope is directly wound around the motor's output shaft during the rope retraction and extension process. Due to the limited diameter and length of the motor's output shaft, the length of the pull rope is restricted, and it is very easy for the pull rope to become unevenly wound, knotted, or piled up. This not only affects the service life of the equipment but may also cause the pull rope to break due to excessive local stress, creating a safety hazard. Utility Model Content

[0004] To address at least one shortcoming in the related technologies, this application provides a resistance transmission device and fitness equipment, which includes a cable guide. Through the cooperation of a gearbox and a screw, the cable guide is driven to move axially, guiding the pull ropes to be arranged in an orderly manner. This virtually eliminates problems such as pull rope stacking and knotting, ensuring the continuity of training and improving the user experience.

[0005] This application provides a resistance transmission device, comprising: a drive source, a gearbox, a rotating shaft, a cable guide, and a screw; the output shaft of the drive source rotates to provide torque; the gearbox includes a driving gear and a driven gear, the driving gear being drivenly connected to the output shaft of the drive source, the driven gear meshing with the driving gear, and the driven gear having an internal threaded hole at its center; the rotating shaft is located on the side of the gearbox away from the drive source, and is drivenly connected to the output shaft of the drive source, the outer circumference of the rotating shaft being used to wind a pull rope; the cable guide is located close to the rotating shaft, and the cable guide cooperates with the lead-out end of the pull rope to guide the winding and unwinding of the pull rope; the screw is parallel to the rotating shaft, one end of the screw is connected to the cable guide, and the other end of the screw is inserted into the internal threaded hole of the driven gear; the rotation of the driving gear drives the rotation of the driven gear, thereby driving the screw to rotate and move linearly along the axial direction, so that the cable guide reciprocates along the axial direction of the rotating shaft.

[0006] In some embodiments, there are multiple driven gears, which are distributed around the driving gear and mesh with it; there are multiple screws corresponding to the multiple driven gears, with one end of each screw connected to the cable guide and the other end threadedly engaged with the corresponding driven gear.

[0007] In some embodiments, the cable guide is located on one side of the rotating shaft in the radial direction, and the cable guide has a guide hole corresponding to the lead-out end of the pull rope, through which the lead-out end of the pull rope is led outward.

[0008] In some embodiments, the cable guide includes a guide, which includes a plurality of assembly parts and a connecting part; the plurality of assembly parts are disposed corresponding to a plurality of screws and fixedly connected to the screws, and the assembly parts are connected by the connecting part to form an integral whole, and a guide hole is provided on the connecting part; a clearance space is formed between the assembly parts and the connecting part, and the clearance space is used to avoid the rotation shaft.

[0009] In some embodiments, the resistance transmission device further includes a mounting frame, which includes a first side plate and a second side plate disposed opposite to each other, and a connecting plate connecting the first side plate and the second side plate; a drive source is mounted on the first side plate, and the end of the rotating shaft away from the gearbox is rotatably mounted on the second side plate.

[0010] In some embodiments, the resistance transmission device further includes a plurality of limiting members that extend axially along the rotation shaft and are circumferentially distributed around the rotation shaft, forming a winding space between the plurality of limiting members and the rotation shaft, the winding space being configured to allow only a single layer of pull rope to be wound around the rotation shaft; both ends of each limiting member are respectively circumferentially rotatably connected to the second side plate and the housing of the gearbox.

[0011] In some embodiments, the cable tray further includes a back plate, which is disposed opposite to the second side plate and mounted on the guide. The back plate has a first sliding hole for the rotating shaft to pass through and a plurality of second sliding holes for the limiting member to pass through. The back plate is slidably mounted on the rotating shaft and the limiting member.

[0012] In some embodiments, the resistance transmission device further includes a mounting plate, which includes a first mounting plate and a second mounting plate. The first mounting plate is mounted on the housing of the gearbox, and the second mounting plate is connected to the edge of the first mounting plate near the connecting plate. The second mounting plate is opposite to the connecting plate and is fixedly connected to the connecting plate.

[0013] In some embodiments, the connecting plate and the guide hole are located on the same side of the rotating shaft, and the connecting plate forms an outlet channel corresponding to the movement path of the pull rope lead-out end. The pull rope is led outward sequentially through the guide hole and the outlet channel along the tangential direction of the rotating shaft.

[0014] This application also provides a fitness device including a resistance transmission device as described in any of the preceding claims.

[0015] Compared with the prior art, this application has at least the following advantages:

[0016] (1) The resistance transmission device provided in at least one embodiment of this application drives the cable guide to move along the axial direction of the rotating shaft through the cooperation of the gearbox and the screw, guides the pull rope to be wound around the rotating shaft in an orderly manner or to be wound out of the rotating shaft in an orderly manner, effectively prevents the pull rope from knotting or tangling, stacking and other phenomena, ensures the continuity of the training process, and improves the user experience.

[0017] (2) The fitness equipment provided in at least one embodiment of this application is equipped with a resistance transmission device. Through the cooperation of a gearbox and a screw, the cable guide moves along the axial direction of the rotating shaft, guiding the pull ropes to be arranged in an orderly manner. During the pull rope release and retraction process, there will be basically no problems such as stacking or knotting, ensuring the continuity of training and improving the user experience. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 The three-dimensional structure of the resistance transmission device provided in the embodiments of this application Figure 1 ;

[0020] Figure 2 The three-dimensional structure of the resistance transmission device provided in the embodiments of this application Figure 2 ;

[0021] Figure 3 This is a front view of the resistance transmission device according to an embodiment of this application in the state of rope winding;

[0022] Figure 4 This is a cross-sectional view of the resistance transmission device according to an embodiment of this application in the state of rope winding;

[0023] Figure 5 This is a front view of the resistance transmission device according to an embodiment of this application in the state where the pull rope is unwound;

[0024] Figure 6 This is a cross-sectional view of the resistance transmission device according to an embodiment of this application in the state where the pull rope is unwound;

[0025] Figure 7 This is an exploded view (excluding the mounting bracket) of the resistance transmission device according to an embodiment of this application.

[0026] Figure 8 This is a schematic diagram of the gearbox structure in an embodiment of this application;

[0027] Figure 9 This is an exploded view of the gearbox in an embodiment of this application;

[0028] Figure 10This is a schematic diagram illustrating the meshing relationship between the driving gear and the driven gear in an embodiment of this application.

[0029] Figure 11 This is a schematic diagram of the cable tray structure in the embodiments of this application. Figure 1 ;

[0030] Figure 12 This is a schematic diagram of the cable tray structure in the embodiments of this application. Figure 2 ;

[0031] Figure 13 This is a schematic diagram of the mounting plate in an embodiment of this application.

[0032] In the picture:

[0033] 1. Drive source; 11. Output shaft of drive source; 2. Rotary shaft; 3. Cable guide; 301. Guide hole; 31. Guide component; 311. Assembly part; 312. Connecting part; 313. Clearance space; 32. Back plate; 321. First sliding hole; 322. Second sliding hole; 4. Gearbox; 41. Drive gear; 42. Driven gear; 421. Internal threaded hole; 43. Receiving part; 431. Second mounting hole; 5. Screw; 6. Mounting bracket; 61. First side plate; 62. Second side plate; 621. First mounting hole; 63. Connecting plate; 631. Outlet channel; 64. Mounting seat; 65. Bearing seat; 7. Limiting component; 71. Limiting rod; 72. Limiting part; 8. Mounting plate; 81. First mounting plate; 82. Second mounting plate; 10. Pull rope. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0036] In the description of this application, it should be understood that the terms "center," "left," "right," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 this application. The terms "first" and "second" 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. The term "multiple" in this application includes two or more cases.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] This application provides a resistance transmission device that can be used in various fitness equipment that uses ropes for strength training.

[0039] like Figures 1-7 As shown, the resistance transmission device includes a drive source 1, a rotating shaft 2, and a cable guide 3.

[0040] Torque is provided by rotating the output shaft 11 of drive source 1. The torque provided by drive source 1 serves as resistance for the user to perform strength training. Drive source 1 can be selected from various existing power components capable of providing torque, such as servo motors.

[0041] The rotating shaft 2 is connected to the output shaft 11 of the drive source 1. The rotation of the output shaft 11 of the drive source 1 drives the rotating shaft 2 to rotate, thereby transmitting torque to the rotating shaft 2. The rotating shaft 2 has a relatively long axial length, which is greater than the length of the output shaft 11 of the drive source 1. The outer circumference of the rotating shaft 2 can be used to wind the pull rope 10, providing sufficient winding length for the pull rope 10. The specific length of the rotating shaft 2 can be designed according to the required length of the pull rope 10 and the diameter of the rotating shaft 2.

[0042] The cable guide 3 is located near the rotating shaft 2. The cable guide 3 cooperates with the lead end of the pull rope 10 and is used to guide the winding and unwinding of the pull rope 10. During the winding and unwinding process of the pull rope 10, the cable guide 3 needs to move in the same direction as the pull rope 10 along the rotating shaft 2, so that the pull rope 10 is wound around the rotating shaft 2 in an orderly manner, or is wound out of the rotating shaft 2 in an orderly manner.

[0043] To enable the cable guide 3 to move axially along the rotating shaft 2, the resistance transmission device also includes a gearbox 4 and a screw 5.

[0044] Gearbox 4 is located between drive source 1 and rotating shaft 2, such as Figures 8-10 As shown, the gearbox 4 includes a driving gear 41 and a driven gear 42. The driving gear 41 is connected to the output shaft 11 of the drive source 1, and the driven gear 42 meshes with the driving gear 41. The driven gear 42 has an internal threaded hole 421 at its center. The output shaft 11 of the drive source 1 drives the driving gear 41 to rotate, and the driving gear 41 meshes with the driven gear 42, causing the driven gear 42 to rotate simultaneously.

[0045] The rotating shaft 2 is located on the side of the gearbox 4 away from the drive source 1. The output shaft 11 of the drive source 1 can pass through the drive gear 41 and connect to the rotating shaft 2, so that the drive source 1 can drive the drive gear 41 and the rotating shaft 2 to rotate simultaneously.

[0046] The screw 5 is parallel to the rotating shaft 2. One end of the screw 5 is connected to the cable guide 3, and the other end of the screw 5 is inserted into the internal threaded hole 421 of the driven gear 42. Optionally, one end of the screw 5 is axially fixed to the cable guide 3 and circumferentially rotatable.

[0047] During use, the output shaft 11 of the drive source 1 rotates by default in the first direction and transmits torque to the drive gear 41 and the rotating shaft 2. The first direction is the same as the winding direction of the pull rope 10. Therefore, the pull rope 10 tends to be wound around the rotating shaft 2. The first direction is either clockwise or counterclockwise.

[0048] By pulling the rope 10, the torque transmitted from the drive source 1 to the rotating shaft 2 is overcome, causing the rotating shaft 2 to rotate in the second direction, and driving the output shaft 11 and the drive gear 41 of the drive source 1 to rotate in the second direction. The second direction is opposite to the first direction, and the rope 10 is wound out of the rotating shaft 2.

[0049] When the external force on the pull rope 10 is removed, the output shaft 11 of the drive source 1 resumes rotation in the first direction, thereby driving the rotating shaft 2 to rotate again in the first direction, and the pull rope 10 is wound around the rotating shaft 2.

[0050] During the rotation of the rotating shaft 2 to retract and extend the rope 10, the driven gear 42 is driven to rotate by the driving gear 41. Since the screw 5 is threadedly engaged with the internal threaded hole 421 of the driven gear 42, the screw 5 moves linearly along the axial direction. The linear movement direction of the screw 5 is the same as the retraction and extension direction of the rope 10. The screw 5 drives the cable guide 3 to move synchronously along the axial direction of the rotating shaft 2.

[0051] During the winding and unwinding process of the pull rope 10, the cable guide 3 moves along the axial direction, guiding the pull rope 10 to be wound in an orderly parallel manner on the rotating shaft 2 or to wind the pull rope 10 out of the rotating shaft 2 one loop at a time, preventing the pull rope 10 from getting knotted or tangled and stacked.

[0052] The screw 5 can be made to move in the same direction as the rope 10 (i.e., winding or releasing direction) by means of the thread rotation design. This is something that can be achieved by those skilled in the art based on common knowledge, and will not be elaborated upon in this application.

[0053] In the above technical solution, the torque is transmitted to the screw 5 through the cooperation of the driving gear 41 and the driven gear 42 in the gearbox 4, so as to realize the linear motion of the screw 5. The screw 5 is connected to the cable guide 3, thereby driving the cable guide 3 to move along the axial direction of the rotating shaft 2, guiding the pull rope 10 to wind orderly around the rotating shaft 2, or to wind out of the rotating shaft 2 in an orderly manner, effectively preventing the pull rope 10 from knotting, tangling, or stacking, ensuring the continuity of the training process and improving the user experience.

[0054] exist Figures 3-6 In the illustrated embodiment, during the pulling of the rope 10, the torque of the drive source 1 is overcome, causing the rotating shaft 2 to rotate. The screw 5 drives the cable guide 3 to move to the right along the axis of the rotating shaft 2, guiding the rope 10 to wind out from left to right in turns. The resistance transmission device consists of... Figure 3 and Figure 4 The state change is Figure 5 and Figure 6 The state of the pull rope 10. During the winding process, the drive source 1 drives the rotating shaft 2 to rotate. Through the cooperation of the gearbox 4 and the screw 5, the cable guide 3 moves to the left along the axis of the rotating shaft 2, guiding the pull rope 10 to wind around the rotating shaft 2 from right to left, achieving single-layer winding and effectively avoiding stacking or knotting problems. The resistance transmission device consists of... Figure 5 and Figure 6 The state returns to Figure 3 and Figure 4 The state.

[0055] It is understandable that during the retraction and extension of the aforementioned rope 10, the screw 5 will move linearly along the axial direction. It is necessary to ensure that there is no interference from other components during the movement stroke of the screw 5. For example, to avoid interference from the drive source 1 to the screw 5, it is necessary to ensure that the screw 5 is located outside the drive source 1 on the projection plane perpendicular to the screw 5. The position of the screw 5 can be changed by adjusting the diameter of the driving gear 41 and / or the driven gear 42 in the gearbox 4.

[0056] In some embodiments, there are multiple driven gears 42, which are distributed around the drive gear 41 and mesh with it; there are multiple screws 5 corresponding to the multiple driven gears 42, with one end of each screw 5 connected to the cable guide 3 and the other end threadedly engaged with the corresponding driven gear 42.

[0057] Through the cooperation of multiple driven gears 42 and multiple screws 5, multiple drive connection positions can be provided for the cable guide 3, ensuring the smoothness and reliability of the cable guide 3's axial movement along the rotating shaft 2. In 1- Figure 7 In the embodiment shown, two screws 5 and two driven gears 42 are respectively provided, symmetrically located on both sides of the driving gear 41, driving the axial movement of the cable guide 3 from both sides.

[0058] The driving gear 41 and driven gear 42 may have the same or different diameters. When the diameters of the driving gear 41 and driven gear 42 are the same, the gearbox 4 transmits power at the same speed and has no torque adjustment function. When the diameter of the driving gear 41 is larger than the diameter of the driven gear 42, the rotational speed of the driven gear 42 increases, and the torque output by the driven gear 42 decreases. When the diameter of the driving gear 41 is smaller than the diameter of the driven gear 42, the rotational speed of the driven gear 42 decreases, and the torque output by the driven gear 42 increases. In practical applications, gearboxes 4 with different transmission ratios can be selected as needed.

[0059] In some embodiments, the cable guide 3 is located on one side of the rotating shaft 2 in the radial direction, and the cable guide 3 has a guide hole 301 corresponding to the lead-out end of the pull rope 10, through which the lead-out end of the pull rope 10 is led outward.

[0060] The cable guide 3 restricts the lead-out end of the pull rope 10 in the guide hole 301, so that the lead-out end of the pull rope 10 can move along the axial direction of the rotating shaft 2 together with the cable guide 3 during the winding or unwinding process, so that the pull rope 10 can be wound and unwinded in an orderly manner.

[0061] In some embodiments, such as Figure 11 and Figure 12As shown, the cable guide 3 includes a guide 31, which includes multiple assembly parts 311 and connecting parts 312. The multiple assembly parts 311 are provided corresponding to multiple screws 5 and are fixedly connected to the screws 5. Each assembly part 311 is connected to form a whole through the connecting parts 312. A clearance space 313 is formed between the assembly parts 311 and the connecting parts 312. The clearance space 313 is used to avoid the rotating shaft 2.

[0062] The cable guide 3 provided in the above embodiment has a simple structure. It is fixedly connected to the screw 5 through the assembly part 311, and the connecting part 312 connects the assembly part 311 into a whole. An avoidance space 313 is formed between the assembly part 311 and the connecting part 312, so that the guide 31 and the rotating shaft 2 are spaced apart, which can prevent the axial movement of the cable guide 3 from interfering with the rotating shaft 2.

[0063] exist Figure 7 In the embodiment shown, there are two screws 5, which are symmetrically located on both sides of the rotating shaft 2. Correspondingly, there are two assembly parts 311 of the cable guide 3, which extend vertically. The connecting part 312 is located at the top, extends horizontally, and connects the two assembly parts 311. A guide hole 301 is provided on the connecting part 312 so that the pull rope 10 is led out from the top.

[0064] In some embodiments, such as Figures 1-6 As shown, the resistance transmission device also includes a mounting frame 6, which includes a first side plate 61 and a second side plate 62 disposed opposite to each other, and a connecting plate 63 connecting the first side plate 61 and the second side plate 62; the drive source 1 is mounted on the first side plate 61; and the end of the rotating shaft 2 away from the gearbox 4 is rotatably mounted on the second side plate 62.

[0065] The first side plate 61 and the second side plate 62 are located at the two ends of the torque transmission axis, respectively, providing a mounting base for each component of the resistance transmission device. The connecting plate 63 connects the first side plate 61 and the second side plate 62, so that the mounting frame 6 forms a stable whole and provides good support for each component.

[0066] In some embodiments, the first side plate 61 and the second side plate 62 are folded outward on the opposite side of the connecting plate 63 to form a mounting base 64. The mounting base 64 is fixedly assembled with the mounting surface on the fitness equipment by fasteners such as bolts, providing a stable mounting structure for the resistance transmission device and preventing the resistance transmission device from shifting under external force or vibration.

[0067] Optionally, a bearing seat 65 is mounted on the second side plate 62, and the end of the rotating shaft 2 is mounted on the second side plate 62 via the bearing seat 65.

[0068] In some embodiments, such as Figure 1As shown, the connecting plate 63 and the guide hole 301 are located on the same side of the rotating shaft 2, and an outlet channel 631 is formed on the connecting plate 63 corresponding to the movement path of the pull rope lead-out end. The outlet channel 631 is specifically an elongated hole, which extends from one end of the rotating shaft 2 to the other end along the axial direction of the rotating shaft 2 on the connecting plate 63, ensuring that the outlet channel 631 can cover the entire path of the pull rope 10 leading outward.

[0069] In some embodiments, the pull rope 10 is led outward sequentially through the guide hole 301 and the outlet channel 631 along the tangential direction of the rotation axis 2.

[0070] Optionally, the guide hole 301 and the outlet channel 631 are configured such that their edges do not contact the pull rope 31 passing through them, thereby avoiding wear caused by the pull rope contacting the edge of the outlet 731 during the pull rope retraction and extension process, and extending the service life of the pull rope 10.

[0071] Specifically, the width of the guide hole 301 and the outlet channel 631 in the radial direction of the rotating shaft 2 is configured to allow the pull rope 10 to be led outward in the tangential direction of the rotating shaft 2.

[0072] In some embodiments, such as Figures 1-7 As shown, the resistance transmission device also includes multiple limiting members 7, which extend along the axial direction of the rotating shaft 2 and are distributed circumferentially around the rotating shaft 2. A winding space is formed between the multiple limiting members 7 and the rotating shaft 2, and the winding space is configured to allow only a single layer of the pull rope 10 to be wound on the rotating shaft 2.

[0073] By setting limiting members 7 around the 2nd circumference of the rotating shaft, the winding position of the pull rope 10 is restricted, further preventing the pull rope 10 from stacking or shifting during the winding process, ensuring that the pull rope 10 is wound in a single layer on the rotating shaft 2. The number of limiting members 7 can be selected according to actual needs. Theoretically, the more limiting members 7 there are, the better the limiting effect on the pull rope 10, but the higher the cost.

[0074] In some embodiments, both ends of each limiting member 7 are circumferentially rotatably connected to the second side plate 62 and the outer casing of the gearbox 4, respectively. By installing the limiting members 7 in a relatively rotatable manner, during the rotation of the rotating shaft 2, the limiting members 7 and the pull rope 10 on the rotating shaft 2 experience friction. Under the action of friction, the limiting members 7 will rotate, resulting in rolling friction between the limiting members 7 and the pull rope 10. This not only limits the movement but also reduces friction, preventing any obstruction to the rotation of the rotating shaft 2.

[0075] In some embodiments, the second side plate 62 has a first mounting hole 621 corresponding to a plurality of limiting members 7, and the outer shell of the gearbox 4 has an internally hollow receiving portion 43 on the side facing the second side plate 62. The receiving portion 43 has a second mounting hole 431 facing the limiting member 7. Each limiting member 7 includes a limiting rod 71 and limiting portions 72 located at both ends of the limiting rod 71. The first end of the limiting rod 71 passes through the first mounting hole 621, and the limiting portion 72 at the first end is located on the outside of the second side plate 62 to restrict the limiting rod 71 from disengaging inward. The second end of the limiting rod 71 is inserted into the second mounting hole 431, and the limiting portion 72 at the second end is accommodated in the receiving portion 43 and can be rotatably disposed relative to it.

[0076] In the above embodiment, a specific installation method for the limiting member 7 is provided. The two ends of the limiting member 7 are supported by the second side plate 62 and the outer shell of the gearbox 4, respectively, so as to realize the positioning and installation of the limiting member 7. The limiting part 72 at both ends of the limiting rod 71 limits the limiting rod 71 between the second side plate 62 and the gearbox 4, and realizes the rotatable installation of the limiting member 7.

[0077] The dimensions of the first mounting hole 621 and the second mounting hole 431 are larger than the dimension of the limiting rod 71 but smaller than the dimension of the limiting part 72. To ensure the rotation of the limiting member 7, the dimensions of the first mounting hole 621 and the second mounting hole 431 are larger than the dimension of the limiting rod 71, with a margin. For example, if the diameter of the limiting rod 71 is 5mm, the diameter of the first mounting hole 621 and the second mounting hole 431 is designed to be 5.5mm.

[0078] In some embodiments, such as Figure 11 and Figure 12 As shown, the cable guide 3 also includes a back plate 32, which is disposed opposite to the second side plate 62 and mounted on the side of the guide 31 near the second side plate 62. The back plate 32 has a first sliding hole 321 for the rotating shaft 2 to pass through and a plurality of second sliding holes 322 for the limiting member 7 to pass through. The back plate 32 is slidably mounted on the rotating shaft 2 and the limiting member 7. By providing the back plate 32, the cable guide 3 is slidably mounted on the rotating shaft 2 and the limiting member 7, thereby achieving the installation positioning and axial guidance of the cable guide 3.

[0079] Since the rotating shaft 2 rotates during the winding and unwinding of the rope 10, and the cable guide 3 slides along the axial direction of the rotating shaft 2, in order to avoid friction between the cable guide 3 and the rotating shaft 2 and thus affect the rotation of the rotating shaft 2, the diameter of the first sliding hole 321 can be increased so that the hole wall of the first sliding hole 321 is spaced apart from the rotating shaft 2 and does not contact it. The cable guide 3 is supported on the limiting member 7 (specifically the limiting rod 71) through the second sliding hole 322, and slides along the axial direction under the guidance of the limiting rod 71, thereby avoiding friction between the back plate 32 of the cable guide 3 and the rotating shaft 2.

[0080] In some embodiments, such as Figures 3-6 and Figure 13 As shown, the mounting plate 8 includes a first mounting plate 81 and a second mounting plate 82; the first mounting plate 81 is mounted on the gearbox 4; the second mounting plate 82 is connected to the edge of the first mounting plate 81 near the connecting plate 63, and the second mounting plate 82 is opposite to the connecting plate 63 and fixedly connected to the connecting plate 63.

[0081] Mounting plate 8 is connected to gearbox 4 via first mounting plate 81 and fixedly connected to connecting plate 63 via second mounting plate 82, thus supporting gearbox 4 and reducing the pressure on output shaft 11 and / or rotating shaft 2 of drive source 1 caused by the weight of gearbox 4, preventing shaft bending.

[0082] In some embodiments, the surface of the first mounting plate 81 is fitted to the housing of the gearbox 4, increasing the connection area with the housing of the gearbox 4. A through hole is provided on the first mounting plate 81, through which the shaft connected to the drive gear 41 passes, avoiding obstruction to axial transmission.

[0083] In some embodiments, a reducer (not shown in the figure) is also provided between the drive source 1 and the gearbox 4. The input end of the reducer is connected to the output shaft 11 of the drive source 1, and the output end of the reducer is connected to the drive gear 41 and the rotating shaft 2 of the gearbox 4, so as to change the magnitude of the torque output by the drive source 1.

[0084] The speed reducer is used to change the speed and torque output by the output shaft 11 of the drive source 1. The gear ratio of the speed reducer is the ratio of the input speed to the output speed. When the gear ratio is greater than the input speed, the speed reducer makes the output speed less than the input speed. According to the law of conservation of energy, under ideal conditions where mechanical losses are ignored, input torque × input speed = output torque × output speed. Therefore, when the output speed decreases, the output torque increases, which increases the training resistance without changing the motor power, thus improving the training intensity and achieving a better training effect. The gear ratio of the speed reducer can be selected according to the required training resistance.

[0085] For example, if the torque output by the output shaft 11 of the drive source 1 is 10 N·m and the transmission ratio of the reducer is 4, then the output speed of the reducer is 1 / 4 of the input speed, and the output torque of the reducer is 4 times the output torque of the drive source 1, increasing the torque to 40 N·m.

[0086] This application also provides a fitness equipment, which includes a resistance transmission device as described in any of the above embodiments. Through the cooperation of the gearbox 4 and the screw 5, the resistance transmission device drives the cable guide 3 to move axially along the rotating shaft 2, guiding the pull ropes 10 to be arranged in an orderly manner. During the release and retraction of the pull ropes 10, problems such as stacking and knotting are basically avoided, ensuring the continuity of training and improving the user experience.

[0087] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] The above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A resistance transmission device, characterized in that, include: A drive source, which rotates through its output shaft to provide torque; A gearbox, comprising a driving gear and a driven gear, wherein the driving gear is connected to the output shaft of the drive source, the driven gear meshes with the driving gear, and the driven gear has an internal threaded hole at its center; A rotating shaft is located on the side of the gearbox away from the drive source. The rotating shaft is connected to the output shaft of the drive source. The outer periphery of the rotating shaft is used for winding a pull rope. A cable guide is provided near the rotating shaft and is used to guide the pull rope by engaging with the lead-out end of the pull rope. A screw, which is parallel to the rotating shaft, has one end connected to the cable guide and the other end inserted into the internal thread hole of the driven gear; The rotation of the driving gear drives the rotation of the driven gear, which in turn drives the screw to rotate and move linearly along the axial direction, so that the cable guide moves linearly along the axial direction of the rotating shaft.

2. The resistance transmission device according to claim 1, characterized in that, The driven gear is provided in multiple ways, and the multiple driven gears are distributed in the circumferential direction of the driving gear and mesh with the driving gear; The screw has multiple screws corresponding to multiple driven gears. One end of each screw is connected to the cable guide, and the other end is threaded into the corresponding driven gear.

3. The resistance transmission device according to claim 2, characterized in that, The cable guide is located on one side of the rotating shaft in the radial direction. The cable guide has a guide hole corresponding to the lead-out end of the pull rope, and the lead-out end of the pull rope is led outward through the guide hole.

4. The resistance transmission device according to claim 3, characterized in that, The cable guide includes a guide, which includes multiple assembly parts and connecting parts; Multiple assembly parts are provided corresponding to multiple screws and are fixedly connected to the screws. Each assembly part is connected to form a whole through the connecting part, and the connecting part is provided with the guide hole. An clearance space is formed between the assembly part and the connecting part, the clearance space being used to avoid the rotating shaft.

5. The resistance transmission device according to claim 4, characterized in that, It also includes a mounting bracket, which includes a first side plate and a second side plate disposed opposite to each other, and a connecting plate connecting the first side plate and the second side plate; The drive source is mounted on the first side plate, and the end of the rotating shaft away from the gearbox is rotatably mounted on the second side plate.

6. The resistance transmission device according to claim 5, characterized in that, It also includes a plurality of limiting members, which extend axially along the rotation axis and are circumferentially distributed around the rotation axis. A winding space is formed between the plurality of limiting members and the rotation axis, and the winding space is configured to allow only a single layer of the pull rope to be wound around the rotation axis. The two ends of each limiting member are respectively circumferentially rotatably connected to the second side plate and the outer shell of the gearbox.

7. The resistance transmission device according to claim 6, characterized in that, The cable tray also includes a back plate, which is disposed opposite to the second side plate and mounted on the guide. The back plate has a first sliding hole for the rotating shaft to pass through and a plurality of second sliding holes for the limiting member to pass through. The back plate is slidably mounted on the rotating shaft and the limiting member.

8. The resistance transmission device according to claim 5, characterized in that, It also includes a mounting plate, which includes a first mounting plate and a second mounting plate. The first mounting plate is mounted on the housing of the gearbox, and the second mounting plate is connected to the edge of the first mounting plate near the connecting plate. The second mounting plate is opposite to the connecting plate and is fixedly connected to the connecting plate.

9. The resistance transmission device according to claim 5, characterized in that, The connecting plate and the guide hole are located on the same side of the rotating shaft. The connecting plate has an outlet channel corresponding to the movement path of the pull rope lead-out end. The pull rope is led outward sequentially through the guide hole and the outlet channel along the tangential direction of the rotating shaft.

10. A fitness equipment, characterized in that, Includes the resistance transmission device as described in any one of claims 1-9.

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