Resistance adjusting structure on running machine

Abstract

The utility model relates to the technical field of fitness equipment, in particular to a resistance adjusting structure on a treadmill, which comprises a flywheel capable of being linked with a synchronizing wheel component of the treadmill, a magnetic control component arranged on a rack beside the flywheel, and a control device used for driving the magnetic control component, the magnetic control assembly comprises a magnetic control clamp rotationally arranged on the rack and a plurality of magnetic sheets arranged in the magnetic control clamp; an elastic reset part is arranged on the rack and used for driving the magnetic control clamp to rotate and reset, and the control device is connected with the magnetic control clamp through a traction assembly; and the control device is used for controlling the magnetic control clamp to rotate, so that the relative overlapping area of the magnet in the magnetic control clamp and the flywheel is enlarged. The scheme has the advantages of simple structure, large resistance adjusting range, low cost and light weight.

Description

TECHNICAL FIELD

[0001] The utility model relates to body -building equipment technical field especially relates to a resistance adjustment structure on treadmill. BACKGROUND

[0002] With the improvement of people's quality and use experience requirement to body -building equipment, the traditional friction type resistance adjustment mode has been difficult to meet the demand. The traditional mode changes the resistance size through the skin -tightening or loosening belt, friction block tight pressure or light pressure flywheel etc., but this mode has the shortcomings such as the parts easy to wear, vibration and noise are big. To solve these problems, magnetic control resistance technology emerges as the times require. The technology gradually applies in body -building equipment and other fields with the advantages of non -contact, resistance regulation precision, noise small etc. When applying on treadmill, magnetic control resistance structure can let the user through the knob, button etc. Operation mode, conveniently adjust the resistance size encountered when moving. This operation mode is simpler and faster than the traditional friction type resistance adjustment, does not need to adjust the close density of manual mechanical parts, can change resistance according to the exercise intensity requirement and self -state at any time.

[0003] At present, the common magnetic control resistance device is to place the arc plate beside the flywheel, install the magnet on the plate, change the resistance by adjusting the distance between the arc plate and the flywheel. For example, in a magnetic control resistance device on treadmill, one end of the arc plate is rotatably connected with the frame, the other end is connected with the knob through the brake cable, and the resistance can be adjusted by rotating the knob to lift or lower the arc plate. For specific reference, please refer to the magnetic control group adjustment structure on treadmill disclosed in the Chinese utility model patent with the publication number "CN215995477U".

[0004] However, this kind of scheme has some limitations. First of all, it requires the flywheel to have a certain thickness to match the arc-shaped magnetic plate around it to achieve better magnetic resistance effect. This leads to a relatively high cost, and the overall weight of the treadmill increases due to the thickening of the flywheel. Secondly, the adjustment mechanism of the arc plate is relatively complex, which may increase the maintenance difficulty and failure rate. In addition, due to the limited range of distance change between the arc plate and the flywheel, it may not be able to achieve a larger range of resistance adjustment.

[0005] In view of the above problems, the prior art needs to be improved. SUMMARY

[0006] In order to solve the above problems, the purpose of the utility model is to provide a resistance adjustment structure on treadmill, which has the advantages of simple structure, large resistance adjustment range, low cost and light weight.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The application discloses a resistance adjusting structure of a running machine, and has the technical scheme as follows: a flywheel capable of being connected with a synchronous wheel assembly of the running machine, a magnetic control assembly arranged on a frame beside the flywheel, and a control device used for driving the magnetic control assembly; the magnetic control assembly comprises a magnetic control clamp rotatably arranged on the frame and a plurality of magnetic force pieces arranged in the magnetic control clamp; an elastic reset component is arranged on the frame and used for driving the magnetic control clamp to rotate and reset; the control device is connected with the magnetic control clamp through a traction assembly; the control device is used for controlling the rotation of the magnetic control clamp so that the relative overlapping area of the magnetic force pieces in the magnetic control clamp and the flywheel is changed.

[0009] Further, the magnetic control clamp comprises two oppositely arranged clamping pieces, and a plurality of groups of magnetic force pieces are arranged in the magnetic control clamp; each group of magnetic force pieces comprises two magnetic force pieces oppositely arranged on the inner side walls of the two clamping pieces; when the magnetic control clamp rotates, the flywheel can enter or exit between the two clamping pieces.

[0010] Further, the elastic reset component is constructed as a tension spring, and the two ends of the tension spring are respectively connected to the frame and one end of the magnetic control clamp; the control device is connected to the other end of the magnetic control clamp through the traction assembly.

[0011] Further, the traction assembly comprises a cable connecting piece, a first cable with two ends respectively connected to the control device and the cable connecting piece, and a second cable with two ends respectively connected to the magnetic control clamp and the cable connecting piece; the control device drives the magnetic control clamp to rotate through the first cable, the cable connecting piece and the second cable.

[0012] Further, the control device is arranged on the upper end of the stand column, the first cable is arranged in the stand column of the running machine, and the upper end of the first cable is connected to the output end of the control device.

[0013] Further, the control device is arranged on the upper end of the stand column, and the control device comprises an adjusting handle rotatably arranged on the upper end of the stand column and a driven device arranged on the adjusting handle and synchronously rotating with the adjusting handle; the adjusting handle and the upper end of the stand column are further provided with a positioning assembly used for positioning the rotating position of the adjusting handle; the upper end of the traction assembly is connected to the driven device.

[0014] Further, the two sides of the upper end of the stand column are provided with cavities, and the positioning assembly and the driven device are arranged in the cavities on the same side or different sides of the upper end of the stand column; the adjusting handle comprises a left shell, a right shell and two decorative rings, the openings of the cavities on the two sides of the upper end of the stand column are covered by the two decorative rings, the lower end portions of the left shell and the right shell are coaxially and rotatably arranged on the left side and the right side of the upper end of the stand column, and the upper ends of the left shell and the right shell are connected through a handle grip rod.

[0015] Further, the application also provides that the central shaft sleeve of the driven device is coaxially arranged with the adjusting handle, and the edge of the ring body of the driven device is provided with a traction hole and a connecting sleeve; the adjusting handle is connected with the connecting sleeve through a connecting piece, so that the driven device and the adjusting handle rotate synchronously; and the upper end of the traction assembly is connected in the traction hole of the driven device.

[0016] Further, the application also provides that the arc-shaped through holes are arranged between the cavities on both sides of the upper end of the column, and the connecting sleeve of the driven device is partially embedded in the arc-shaped through holes.

[0017] Further, the application also provides that the positioning assembly comprises a brake block fixedly connected with the adjusting handle and rotating synchronously with the adjusting handle, an adjusting plate arranged at the upper end of the column, and a plurality of sets of elastic pin assemblies arranged on the brake block; a plurality of positioning holes are arranged on the adjusting plate along the circumferential direction of the adjusting plate, and when the brake block rotates with the adjusting handle, the output end of the elastic pin assembly can be clamped into the corresponding positioning hole to position the adjusting handle relative to the column.

[0018] As can be seen from the above, the application provides a resistance adjusting structure of a treadmill, which comprises a flywheel capable of being connected with a synchronous wheel assembly of the treadmill, a magnetic control assembly arranged on a rack beside the flywheel, and a control device for driving the magnetic control assembly; the magnetic control assembly comprises a magnetic control clamp rotatably arranged on the rack, and a plurality of magnetic force sheets arranged in the magnetic control clamp; an elastic reset component is arranged on the rack for driving the magnetic control clamp to rotate and reset, the control device is connected with the magnetic control clamp through a traction assembly; and the control device is used for controlling the rotation of the magnetic control clamp, so that the relative overlapping area of the magnets in the magnetic control clamp and the flywheel is adjusted.

[0019] The resistance is adjusted by controlling the rotation of the magnetic control clamp to adjust the relative overlapping area of the magnetic force sheets and the flywheel, so that the resistance is adjusted, and the resistance adjusting structure has the advantages of simple structure, large resistance adjusting range, low cost, and light weight. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a schematic view of a resistance adjusting structure of a treadmill provided by the application.

[0021] Figure 2 FIG. 2 is a partial enlarged view of FIG. 1. Figure 1

[0022] Figure 3 FIG. 3 is an installation schematic view of a magnetic control assembly in the resistance adjusting structure provided by the application.

[0023] Figure 4 FIG. 4 is an exploded view of a control device.

[0024] Figure 5 FIG. 5 is a structural schematic view of a magnetic clamp. ​

[0025] Figure 6 Structure diagram of the adjusting plate. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0027] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include direct contact of the first and second features, or indirect contact of the first and second features through another feature between them. Moreover, the first feature "on", "above" and "on" of the second feature includes the first

[0031] The feature is directly above and obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The first feature is directly below, below and under the second feature, including the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0032] As shown in Figures 1-6 The embodiment relates to a resistance adjusting structure on a treadmill, which comprises a flywheel 2 capable of linkage with a synchronous wheel assembly of the treadmill, a magnetic control assembly 3 arranged beside the flywheel 2 on a frame 1, and a control device 4 for driving the magnetic control assembly 3. The magnetic control assembly 3 comprises a magnetic control clamp 31 rotatably arranged on the frame 1, and a plurality of magnetic force sheets 32 arranged in the magnetic control clamp 31. An elastic reset component 33 is arranged on the frame 1 for driving the magnetic control clamp 31 to rotate and reset, and the control device 4 is connected to the magnetic control clamp 31 through a traction assembly. The control device 4 is used for controlling the rotation of the magnetic control clamp 31, so that the relative overlapping area of the magnets in the magnetic control clamp 31 and the flywheel 2.

[0033] The technical scheme combines the magnetic control assembly 3 and the control device 4, realizes non-contact adjustment of the resistance of the treadmill, the flywheel 2 is linked with the synchronous wheel assembly, the magnetic control assembly 3 adjusts the resistance through the relative overlapping area of the magnetic force sheets 32 in the magnetic control clamp 31 and the flywheel 2. The elastic reset component 33 ensures that the magnetic control clamp 31 can reset after adjustment, and the control device 4 accurately controls the rotation of the magnetic control clamp 31 through the traction assembly, so as to adjust the overlapping area of the magnetic force sheets 32 and the flywheel 2, and achieve the purpose of adjusting the resistance. This design can realize magnetic resistance control by using a relatively thin flywheel 2, reduce the thickness requirement of the flywheel 2, thereby reducing the weight and cost of the flywheel 2, and avoiding the wear and noise problems in the traditional friction type adjustment mode, and improving the convenience of operation and the accuracy of adjustment.

[0034] Compared with the prior art, the technical scheme of the application has obvious advantages. First, the non-contact resistance adjustment is realized through the magnetic control assembly 3, which avoids the wear and noise problems caused by the contact between parts in the traditional friction type adjustment mode. Second, the control device 4 accurately controls the rotation of the magnetic control clamp 31 through the traction assembly, so that the resistance adjustment is more accurate and convenient. In addition, since the thickness requirement of the flywheel 2 is reduced, the overall structure is more lightweight, and the manufacturing cost is reduced.

[0035] In an implementable solution, the rotation of the magnetic clamp 31 can be achieved in various ways. For example, the magnetic clamp 31 can be designed to be driven by a motor, which is connected to the magnetic clamp 31 through gears or belts, thereby achieving precise control of rotation. Further, the rotation angle of the magnetic clamp 31 can be monitored by a sensor to ensure that the overlapping area of the magnetic pieces 32 and the flywheel 2 reaches a preset value. Specifically, the sensor can be an angle sensor or a position sensor for real-time feedback of the position information of the magnetic clamp 31, and the control device 4 adjusts the rotation angle of the magnetic clamp 31 according to the feedback information. As a preferred embodiment, the magnetic pieces 32 in the magnetic clamp 31 can be designed to be adjustable, i.e., the number and position of the magnetic pieces 32 can be adjusted as needed. For example, the magnetic pieces 32 can move in the magnetic clamp 31 by sliding or rotating, thereby changing the overlapping area with the flywheel 2. Thus, the user can flexibly adjust the resistance according to different exercise needs.

[0036] As shown in the specific embodiment, Figure 5 The magnetic clamp 31 includes two oppositely arranged clamping pieces 311, and a plurality of groups of magnetic pieces 32 are arranged in the magnetic clamp 31. Each group of magnetic pieces 32 includes two magnetic pieces 32 arranged oppositely on the inner side walls of the two clamping pieces 311. When the magnetic clamp 31 rotates, the flywheel 2 can enter or exit between the two clamping pieces 311. Specifically, the magnetic pieces 32 are fixed on the inner side walls of the clamping pieces 311, and each group of magnetic pieces 32 includes two magnetic pieces 32 arranged oppositely on the inner side walls of the two clamping pieces 311. This arrangement allows the flywheel 2 to enter or exit between the two clamping pieces 311 when the magnetic clamp 31 rotates, thereby achieving adjustment of the resistance of the flywheel 2. The magnetic pieces 32 can be permanent magnets or electromagnets, and the specific choice depends on the application scenario and design requirements. For example, permanent magnets can provide stable magnetic force, while electromagnets can adjust the magnetic force by adjusting the current, thereby achieving more precise resistance control. The rotation of the magnetic clamp 31 can be driven by the control device 4, which is connected to the magnetic clamp 31 through a traction assembly, thereby achieving precise control of the rotation angle of the magnetic clamp 31. In this way, the rotation angle of the magnetic clamp 31 can be precisely controlled, thereby achieving precise adjustment of the resistance of the flywheel 2. Thus, the technical solution of the present application solves the technical problem of the arrangement of the magnetic pieces 32 in the magnetic clamp 31 by the arrangement of the magnetic pieces 32 in the magnetic clamp 31. The magnetic pieces 32 in the magnetic clamp 31 can effectively generate magnetic force with the flywheel 2 to adjust the resistance of the flywheel 2. Since the two side magnets generate magnetic force together, the magnetic resistance effect is better, while ensuring smooth rotation of the magnetic clamp 31, improving the accuracy and stability of the adjustment. Compared with the prior art, the technical solution of the present application has higher adjustment accuracy and stability, and can better meet the user's demand for resistance adjustment of fitness equipment.

[0037] Further, the elastic reset component 33 is configured as a tension spring, with both ends connected to the rack 1 and one end of the magnetic control clamp 31 respectively; the control device 4 is connected to the other end of the magnetic control clamp 31 through a traction assembly. Specifically, the tension spring serves as an elastic reset component 33, with both ends fixed to the rack 1 and one end of the magnetic control clamp 31 respectively. This design enables the magnetic control clamp 31 to quickly return to the initial position through the elastic reset function of the tension spring after being subjected to the traction force of the control device 4. The control device 4 is connected to the other end of the magnetic control clamp 31 through a traction assembly, which ensures that the control device 4 can effectively control the rotation of the magnetic control clamp 31, thereby achieving the adjustment of the relative overlapping area between the magnets in the magnetic control clamp 31 and the flywheel 2. Through the elastic reset function of the tension spring and the traction effect of the control device 4, precise control and rapid response of the treadmill resistance adjustment are achieved. As a preferred embodiment, the tension spring can be made of high-strength spring steel material to ensure its durability and stability under high-frequency use. In addition, the two ends of the tension spring can be fixed to the rack 1 and the magnetic control clamp 31 through bolts or welding to ensure the firmness of the connection. The connection between the control device 4 and the magnetic control clamp 31 can be achieved through traction assemblies such as cables or connecting rods, which should have sufficient strength and flexibility to withstand the tension and torque during the rotation of the magnetic control clamp 31. Thus, the technical solution of the present application achieves precise control and rapid response of the treadmill resistance adjustment through the elastic reset function of the tension spring and the traction effect of the control device 4. Compared with the prior art, this scheme not only improves the accuracy and response speed of resistance adjustment, but also simplifies the structural design, reduces the manufacturing cost and maintenance difficulty. Through the elastic reset function of the tension spring, the magnetic control clamp 31 can quickly return to the initial position under the traction of the control device 4, thereby ensuring the stability and reliability of the resistance adjustment.

[0038] As Figure 2 and 3As shown, the traction assembly includes a cable connector 51, a first cable 52 connecting the control device 4 and the cable connector 51 at both ends, and a second cable 53 connecting the magnetic control clamp 31 and the cable connector 51 at both ends; the control device 4 drives the magnetic control clamp 31 to rotate through the first cable 52, the cable connector 51, and the second cable 53. Specifically, the cable connector 51 serves as an intermediate connector, ensuring effective force transmission between the first cable 52 and the second cable 53. One end of the first cable 52 is connected to the control device 4, and the other end is connected to the cable connector 51; one end of the second cable 53 is connected to the cable connector 51, and the other end is connected to the magnetic control clamp 31. This structure enables the control device 4 to indirectly control the rotation of the magnetic control clamp 31 through the traction assembly. For example, the cable connector 51 can be made of metal or high-strength plastic to ensure its durability and stability. The first cable 52 and the second cable 53 can be made of steel wire or synthetic fiber rope to provide sufficient strength and flexibility. In this way, the control device 4 can accurately adjust the rotation angle of the magnetic control clamp 31, and thus adjust the relative overlapping area of the magnets in the magnetic control clamp 31 and the flywheel 2, achieving the purpose of adjusting the resistance of the treadmill. This design not only simplifies the connection between the control device 4 and the magnetic control clamp 31, but also improves the accuracy and stability of control. As a preferred embodiment, the cable connector 51 can be designed to be adjustable in length to adapt to different models of treadmills and different installation requirements. In summary, through the design of the traction assembly, the control device 4 can accurately control the magnetic control clamp 31, solving the technical problem of how to achieve precise rotational control of the magnetic control clamp 31 by the control device 4 through the traction assembly, thereby adjusting the resistance on the treadmill. Compared with the prior art, the technical solution of the present application has higher control accuracy and stability, simplifies the structure, and improves the convenience of operation.

[0039] As Figure 4As shown, the control device 4 is arranged at the upper end of the column 6, the first cable 52 is arranged in the column 6 of the treadmill, and the upper end of the first cable 52 is connected to the output end of the control device 4. Specifically, the design of arranging the control device 4 at the upper end of the column 6 enables the control device 4 to effectively link with the magnetic control clamp 31, facilitating user operation. By arranging the first cable 52 in the column 6 of the treadmill, the first cable 52 can be hidden and protected, and its upper end is connected to the output end of the control device 4, ensuring that the control device 4 can accurately control the magnetic control clamp 31 through the first cable 52. This design not only optimizes the position of the control device 4, but also improves the stability and convenience of operation of the entire system. Thus, the technical scheme of the present application achieves effective control of the magnetic control clamp 31 by arranging the control device 4 at the upper end of the column 6 and arranging the first cable 52 in the column 6. This design not only solves the problem of the installation position of the control device 4, but also improves the stability and convenience of operation of the system. Compared with the prior art, the technical scheme of the present application has higher accuracy and better user experience.

[0040] In a further scheme, the control device 4 comprises an adjusting handle 41 arranged at the upper end of the stand 6, and a driven device 42 arranged on the adjusting handle 41 and synchronously rotating with the adjusting handle 41; the adjusting handle 41 is further provided with a positioning assembly at the upper end of the stand 6, the positioning assembly being used for positioning the rotating position of the adjusting handle 41; the upper end of the traction assembly is connected to the driven device 42. Specifically, the rotation of the adjusting handle 41 can be realized by manual operation, and the user can synchronously drive the rotation of the driven device 42 by rotating the adjusting handle 41. The rotation of the driven device 42 is transmitted to the magnetic clamp 31 through the traction assembly, so as to control the rotating angle of the magnetic clamp 31. The positioning assembly ensures that the adjusting handle 41 can be fixed at the required position after rotation, avoiding the problem of inaccurate resistance adjustment caused by handle loosening or sliding. The positioning assembly can comprise a brake block 43 and an adjusting plate 44, the brake block 43 is provided with an elastic pin assembly 45, the adjusting plate 44 is provided with a plurality of positioning holes 441 along the circumference thereof, and the output end of the elastic pin assembly 45 can be clamped into the corresponding positioning hole 441, so as to realize the positioning of the adjusting handle 41. Thus, the technical scheme of the present application is arranged at the upper end of the stand 6, which is convenient for the user to operate and observe. The arrangement of the adjusting handle 41 and the driven device 42 enables the user to synchronously rotate the driven device 42 by rotating the adjusting handle 41, so as to control the movement of the traction assembly. The arrangement of the positioning assembly ensures that the adjusting handle 41 can be fixed at the required position after rotation, improving the accuracy and convenience of operation. The upper end of the traction assembly is connected to the driven device 42, so that the rotation of the driven device 42 can directly drive the traction assembly, and then control the rotation of the magnetic clamp 31, realizing the adjustment of the resistance. Compared with the prior art, the technical scheme of the present application simplifies the operation steps, improves the convenience and accuracy of resistance adjustment, reduces the complexity of user operation, and improves the user experience.

[0041] As Figure 4As shown, the two sides of the upper end of the column 6 are provided with cavities 60, and the positioning assembly and the actuator 42 are arranged in the cavities 60 on the same side or different sides of the upper end of the column 6; the adjusting handle 41 comprises a left shell 411, a right shell 412 and two decorative rings 413, the openings of the cavities 60 on the two sides of the upper end of the column 6 are covered by the two decorative rings 413, the lower ends of the left shell 411 and the right shell 412 are coaxially rotatably arranged on the left and right sides of the upper end of the column 6, and the upper ends of the left shell 411 and the right shell 412 are connected through a handle grip rod 414. Specifically, the arrangement of the cavities 60 can ensure the stability and accuracy of the positioning assembly and the actuator 42, and the decorative rings 413 are not only beautiful but also can protect the internal structure from dust and foreign matters. The coaxial rotation design of the left shell 411 and the right shell 412 ensures the stable rotation of the adjusting handle 41, and the connection of the handle grip rod 414 provides the convenience and stability of operation. Therefore, the technical scheme of the present application ensures the synchronous rotation of the adjusting handle 41 and the actuator 42 through the above technical features, and realizes accurate positioning through the positioning assembly, thereby solving the technical problems of the synchronous rotation of the adjusting handle 41 and the actuator 42 and positioning in the resistance adjusting structure of the treadmill. Compared with the prior art, the technical scheme of the present application has higher stability and operation convenience, and can effectively improve the user experience.

[0042] Further, the application also proposes that the central shaft sleeve of the driven device 42 is coaxially arranged with the adjusting handle 41, the edge of the ring body of the driven device 42 is provided with a traction hole 421 and a connecting shaft sleeve 422; the adjusting handle 41 is connected with the connecting shaft sleeve 422 through a connecting piece, so that the driven device 42 rotates synchronously with the adjusting handle 41; the upper end of the traction assembly is connected in the traction hole 421 of the driven device 42. Among them, the central shaft sleeve of the driven device 42 is coaxially arranged with the adjusting handle 41, which ensures that the rotation axes of the two are consistent, so as to realize the synchronous rotation of the driven device 42 and the adjusting handle 41. The edge of the ring body of the driven device 42 is provided with a traction hole 421 and a connecting shaft sleeve 422, and the connecting shaft sleeve 422 is connected with the adjusting handle 41 through a connecting piece, which further ensures the synchronism of the driven device 42 and the adjusting handle 41. The upper end of the traction assembly is connected in the traction hole 421 of the driven device 42, so that the power of the control device 4 can be transmitted to the driven device 42 through the traction assembly, thereby realizing the rotation control of the magnetic control clamp 31. Specifically, the connecting shaft sleeve 422 can be fixedly connected with the adjusting handle 41 through bolts, pins or other connecting pieces, so as to realize synchronous rotation. The traction hole 421 can be designed as a circle, a square or other shapes to adapt to the connection requirements of different traction assemblies. The traction assembly can adopt a flexible connecting piece such as a steel wire rope, a chain or a belt to transmit the power of the control device 4. As a preferred embodiment, the edge of the ring body of the driven device 42 can be provided with a plurality of traction holes 421 to increase the connection points of the traction assembly and improve the stability and reliability of power transmission. The connecting shaft sleeve 422 can be designed as detachable to facilitate maintenance and replacement. The upper end of the traction assembly can be fixedly connected with the traction hole 421 through hooks, buckles or other connecting pieces to ensure the firmness of the connection. Thus, through this design, the synchronous rotation of the driven device 42 and the adjusting handle 41 is realized, and the traction assembly can effectively transmit the power of the control device 4, solving the technical problems of synchronous rotation of the driven device 42 and the adjusting handle 41 and power transmission. Compared with the prior art, the technical scheme has the advantages of simple structure, convenient operation, stable power transmission, etc., and can effectively improve the precision and reliability of the treadmill resistance adjustment.

[0043] Further, the application also proposes that an arc-shaped through hole 61 is provided between the two chambers 60 on the upper end of the column 6, and the connecting shaft sleeve 422 of the driven part 42 is partially embedded in the arc-shaped through hole 61. Specifically, the design of the arc-shaped through hole 61 allows the connecting shaft sleeve 422 of the driven part 42 to be partially embedded therein, thereby achieving the synchronous rotation of the driven part 42 and the adjusting handle 41. The arc-shaped through hole 61 not only provides a stable movement track for the connecting shaft sleeve 422, but also ensures the precise positioning of the driven part 42 during rotation. As a preferred embodiment, the shape of the arc-shaped through hole 61 can be semicircular, elliptical or other suitable curved shapes to adapt to different movement requirements. In addition, the size and position of the arc-shaped through hole 61 can be adjusted according to specific application scenarios to ensure that the connecting shaft sleeve 422 does not deviate or jam during movement. Thus, the technical solution of the application simplifies the connection mode between the driven part 42 and the adjusting handle 41 by providing the arc-shaped through hole 61, and improves the reliability and operation convenience of the entire resistance adjusting structure. Compared with the prior art, this scheme not only solves the positioning and movement problems of the connecting shaft sleeve 422 during the synchronous rotation of the driven part 42 and the adjusting handle 41, but also reduces the friction and wear between components through the design of the arc-shaped through hole 61, prolonging the service life of the equipment. In addition, the structure design is compact, easy to install and maintain, further improving the user experience.

[0044] As Figure 4As shown, the positioning assembly includes a brake block 43 fixedly connected to the adjustment handle 41 and synchronously rotated therewith, an adjustment plate 44 arranged at the upper end of the stand column 6, and a plurality of elastic pin assemblies 45 arranged on the brake block 43; the adjustment plate 44 is provided with a plurality of positioning holes 441 arranged circumferentially thereon, and when the brake block 43 rotates with the adjustment handle 41, the output ends of the elastic pin assemblies 45 can be clamped into the corresponding positioning holes 441 to position the adjustment handle 41 relative to the stand column 6. The fixed connection of the brake block 43 and the adjustment handle 41 can be achieved by welding, bolt connection or other mechanical connection methods to ensure the synchronism of the two when rotating. The positioning holes 441 on the adjustment plate 44 can be uniformly distributed or non-uniformly distributed according to actual needs to adapt to different positioning requirements. The number of hole positions of the adjustment plate 44 represents the number of gears, but the rotation angle of the magnetic control assembly 3 is fixed, and the number of hole positions in this angle will affect the strength difference between the gears, which can be optimized according to needs. The elastic pin assembly 45 can adopt a spring-loaded pin structure, and the end of the pin can be designed as a conical or spherical shape to facilitate smooth clamping into the positioning hole 441. In addition, the number and arrangement of the elastic pin assemblies 45 can be adjusted according to the rotation range of the adjustment handle 41 and the positioning accuracy requirements. Specifically, when the user rotates the adjustment handle 41, the brake block 43 synchronously rotates, and the output ends of the elastic pin assemblies 45 are stretched outward under the action of the spring, and when rotated to a certain position, the output ends of the elastic pin assemblies 45 are clamped into the corresponding positioning holes 441 on the adjustment plate 44, thereby achieving accurate positioning of the adjustment handle 41. This design not only improves the accuracy of positioning, but also enhances the stability of operation, avoiding operation errors or equipment damage caused by inaccurate positioning. Therefore, the technical scheme of the present application realizes accurate positioning of the adjustment handle 41 through synchronous rotation of the brake block 43 and the adjustment handle 41, and cooperation of the elastic pin assemblies 45 and the positioning holes 441 on the adjustment plate 44. Compared with the prior art, the scheme has the advantages of high positioning accuracy, stable operation and simple structure, and can effectively solve the technical problems of inaccurate positioning and unstable operation of the resistance adjustment handle 41 of the treadmill.

[0045] The adjustment process of the resistance adjustment structure on the above treadmill is as follows:

[0046] One, the process of increasing resistance: the user rotates the adjusting handle 41 counterclockwise to synchronously drive the rotation of the driven device 42. The rotation of the driven device 42 is transmitted to the magnetic control clamp 31 through the traction assembly, thereby controlling the rotation angle of the magnetic control clamp 31. During the traction process, the magnetic control clamp 31 is driven to rotate clockwise through the first cable 52, the cable connecting piece 51 and the second cable 53 in the traction assembly in turn. The magnetic control clamp 31 rotates with its axis point as the center, so that the lower end of the magnetic control clamp 31 approaches the flywheel 2, the flywheel 2 can enter between the two clamping pieces 311 of the magnetic control clamp 31, and the magnetic force piece 32 in the magnetic control clamp 31 can effectively generate a magnetic force with the flywheel 2. As the rotation angle of the magnetic control clamp 31 increases, the overlapping area of the magnetic force piece 32 and the flywheel 2 becomes larger, the rotation resistance of the flywheel 2 increases, and then the rotation resistance of the front synchronous wheel of the treadmill increases, and finally the exercise resistance of the exerciser increases.

[0047] Two, the process of reducing resistance: the user rotates the adjusting handle 41 clockwise to synchronously drive the rotation of the driven device 42. The rotation of the driven device 42 is transmitted to the magnetic control clamp 31 through the traction assembly, the elastic reset component 33 makes the magnetic control clamp 31 rotate counterclockwise, the overlapping area of the magnetic force piece 32 and the flywheel 2 becomes smaller, the rotation resistance of the flywheel 2 increases, and then the rotation resistance of the front synchronous wheel of the treadmill decreases, and finally the exercise resistance of the exerciser decreases.

[0048] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application without departing from the principles and spirits of the present application.

Claims

1. A resistance adjusting structure on a treadmill, comprising a flywheel (2) capable of linkage with a synchronous wheel assembly of the treadmill, a magnetic control assembly (3) provided on a frame (1) beside the flywheel (2), and a control device (4) for driving the magnetic control assembly (3); characterized in that: The magnetic control assembly (3) comprises a magnetic control clamp (31) rotatably arranged on the frame (1), and a plurality of magnetic force pieces (32) arranged in the magnetic control clamp (31); the frame (1) is provided with an elastic reset component (33) for driving the magnetic control clamp (31) to rotate and reset, and the control device (4) is connected to the magnetic control clamp (31) through a traction assembly; the control device (4) is used for controlling the rotation of the magnetic control clamp (31) so that the relative overlapping area of the magnets in the magnetic control clamp (31) and the flywheel (2) is overlapped.

2. The resistance adjustment structure on a treadmill according to claim 1, wherein: The magnetic control clamp (31) comprises two oppositely arranged clamping pieces (311), and a plurality of groups of magnetic force pieces (32) are arranged in the magnetic control clamp (31); each group of magnetic force pieces (32) comprises two magnetic force pieces (32) oppositely arranged on the inner side walls of the two clamping pieces (311); when the magnetic control clamp (31) rotates, the flywheel (2) can enter or exit between the two clamping pieces (311).

3. The resistance adjustment structure on a treadmill according to claim 1, wherein: The elastic reset component (33) is constructed as a tension spring, and the two ends of the tension spring are respectively connected to one end of the frame (1) and the magnetic control clamp (31); the control device (4) is connected to the other end of the magnetic control clamp (31) through the traction assembly.

4. The resistance adjustment structure on a running machine according to claim 3, characterized in that: The traction assembly comprises a cable connecting piece (51), a first cable (52) having two ends respectively connected to the control device (4) and the cable connecting piece (51), and a second cable (53) having two ends respectively connected to the magnetic control clamp (31) and the cable connecting piece (51); the control device (4) drives the magnetic control clamp (31) to rotate through the first cable (52), the cable connecting piece (51) and the second cable (53).

5. The resistance adjustment structure on a running machine according to claim 4, characterized in that: The control device (4) is arranged on the upper end of the stand column (6), the first cable (52) is arranged in the stand column (6) of the treadmill, and the upper end of the first cable (52) is connected to the output end of the control device (4).

6. The resistance adjustment structure on a running machine according to claim 1, wherein: The control device (4) is arranged on the upper end of the stand column (6), and the control device (4) comprises an adjusting handle (41) rotatably arranged on the upper end of the stand column (6), and a driven device (42) arranged on the adjusting handle (41) and synchronously rotated with the adjusting handle (41); the adjusting handle (41) and the upper end of the stand column (6) are further provided with a positioning assembly for positioning the rotating position of the adjusting handle (41); the upper end of the traction assembly is connected to the driven device (42).

7. The resistance adjustment structure on a running machine according to claim 6, characterized in that: The upper end of the stand column (6) is provided with cavities (60) on both sides, and the positioning assembly and the driven device (42) are arranged in the cavities (60) on the same side or different sides of the upper end of the stand column (6); the adjusting handle (41) comprises a left shell (411), a right shell (412) and two decorative rings (413), the openings of the cavities (60) on both sides of the upper end of the stand column (6) are covered by the two decorative rings (413), the left shell (411) and the right shell (412) are coaxially rotatably arranged on the left and right sides of the upper end of the stand column (6), and the upper ends of the left shell (411) and the right shell (412) are connected by a handle grip rod (414).

8. The resistance adjustment structure on a running machine according to claim 7, characterized in that: The central shaft sleeve of the driven device (42) is coaxially arranged with the adjusting handle (41), and the ring body edge of the driven device (42) is provided with a traction hole (421) and a connecting shaft sleeve (422); the adjusting handle (41) is connected with the connecting shaft sleeve (422) through a connecting piece, so that the driven device (42) and the adjusting handle (41) rotate synchronously; and the upper end of the traction assembly is connected in the traction hole (421) of the driven device (42).

9. The resistance adjustment structure on a running machine according to claim 8, characterized in that: Arc-shaped through holes (61) are arranged between the cavities (60) on both sides of the upper end of the column (6) to communicate with each other, and the connecting shaft sleeve (422) of the driven device (42) is partially embedded in the arc-shaped through holes (61).

10. The resistance adjustment structure on a running machine according to claim 6, characterized in that: The positioning assembly comprises a brake block (43) fixedly connected with the adjusting handle (41) and rotating synchronously with the adjusting handle (41), an adjusting plate (44) arranged at the upper end of the column (6), and a plurality of groups of elastic pin assemblies (45) arranged on the brake block (43); a plurality of positioning holes (441) are arranged on the adjusting plate (44) in the circumferential direction, and when the brake block (43) rotates with the adjusting handle (41), the output end of the elastic pin assembly (45) can be clamped into the corresponding positioning hole (441) to position the adjusting handle (41) relative to the column (6).

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