Resistance Adjustment Braking Device and Its Usage Method

Abstract

The present invention relates to a resistance adjustment brake device which has not only a large resistance adjustment range but also high resistance adjustment precision and various resistance adjustment means, and a method for using the same. A wire puller and a rotating core shaft assembly are installed on a frame, a fixed shaft is provided on the frame and the fixed shaft is arranged parallel to the core shaft in the rotating core shaft assembly, a rotating sleeve is installed on the upper end of the fixed shaft, a transmission member is provided between the rotating sleeve and the core shaft, and when the core shaft rotates, the transmission member can drive the rotating sleeve to rotate around the fixed shaft, an elastic sliding member is provided on the shaft body of the fixed shaft and the elastic sliding member is located below the rotating sleeve, a lower magnetic member is provided on the elastic sliding member, and an upper magnetic member arranged opposite to the lower magnetic member is provided on the rotating sleeve, and when the wire puller pulls, the elastic sliding member can drive the lower magnetic member downward and the elastomer in the elastic sliding member is compressed. Advantages: This device has not only a large resistance adjustment range but also high resistance adjustment precision and various resistance adjustment means.

Description

Technical Field

[0001] The present invention relates to a resistance regulating brake device and a use method thereof, which has a large resistance adjustment range, high resistance adjustment precision, diverse resistance adjustment means, simple structure and good use stability, and belongs to the technical field of fitness equipment. Background Art

[0002] The existing damping adjustment mechanism is relatively complex in structure and has the disadvantages of small resistance adjustment range, poor precision and single means, such as CN 210845130 U. Name: "A double-scull rowing machine with magnetically controlled adjustable resistance" comprises a main frame, a seat, a damping mechanism, and a gripping portion for lifting and holding the exerciser's hands; the main frame has a slide rail on which the seat slides; the double-scull rowing machine also includes a double-cord spring take-up and a magnetically controlled adjustment mechanism; the double-cord spring take-up has a rotatable pulley that rotates when at least one of the tension cords is pulled; the double-cord spring take-up and the damping mechanism are respectively mounted on the main frame; the pulley of the double-cord spring take-up is linked to the damping mechanism so that rotation of the pulley of the double-cord spring take-up drives the damping mechanism to rotate; the free ends of the two tension cords are respectively fixed to the two gripping portions; the magnetically controlled adjustment mechanism is mounted on the damping mechanism to achieve resistance adjustment. The double-scull rowing machine includes left and right grips, and the two gripping portions are the left and right grips. The double-scull rowing machine includes a left rowing rod and a right rowing rod; the bottoms of the left rowing rod and the right rowing rod are universally rotatable mounted on the main frame and are located on both sides of the slide rail; the two gripping parts are respectively arranged on the upper parts of the left rowing rod and the right rowing rod. The slide rail is arranged at an angle. The damping mechanism includes a wind wheel and a central axis, the central axis is rotatably mounted on the main frame through a bearing, the wind wheel is fixed to the central axis, and the central axis is also connected to the pulley through a belt transmission to provide wind resistance when the pulley rotates and drives the wind wheel to rotate. The damping mechanism also includes a water tank, which is fixed to the main frame; the water tank covers the wind wheel to provide water resistance when the pulley drives the wind wheel to rotate. The magnetic control adjustment mechanism includes an aluminum disk, a magnetic plate assembly, a fine-tuning knob and a fine-tuning wire; the aluminum disk is fixed to the central axis, the magnetic plate assembly is installed on the main frame and adapted to the periphery of the aluminum disk, the fine-tuning knob is installed on the main frame, one end of the fine-tuning wire is connected to the fine-tuning knob, and the other end of the fine-tuning wire is connected to the magnetic plate assembly, and the magnetic plate assembly contains multiple magnetic blocks. The double-pull rope spring winder also includes a webbing wheel shaft, two winders and two one-way bearings; the webbing wheel shaft is installed on the main frame; the two winders are respectively mounted on the webbing wheel shaft for bidirectional rotation and are symmetrically located on both sides of the belt pulley, and the two winders are respectively linked with the belt pulley on both sides of the belt pulley through two one-way bearings to realize one-way driving of the belt pulley to rotate, and the belt pulley is provided with a first shaft sleeve, and the first shaft sleeve of the belt pulley is installed in the winder through the one-way bearing; the tension rope is installed on one side of the winder, and a vortex spring is provided on the other side, and the tension rope of the winder is distributed on the side close to the belt pulley.The double-pull rope spring take-up device also includes a webbing pulley and a webbing pulley cover. The webbing pulley is mounted on the webbing pulley shaft via a bearing to enable bidirectional rotation relative to the webbing pulley shaft. The vortex spring is mounted within the webbing pulley, and the webbing pulley cover is fixed to the webbing pulley and surrounds the vortex spring therein. The webbing pulley is provided with a mounting groove, and the tension rope is mounted within the mounting groove of the webbing pulley. The webbing pulley is provided with a second shaft sleeve, and the first shaft sleeve of the belt pulley is mounted within the second shaft sleeve of the webbing pulley via the one-way bearing. A webbing pulley positioning sleeve is mounted on the webbing pulley shaft, and the webbing pulley positioning sleeve fits within the space enclosed by the webbing pulley and the webbing pulley cover. One end of the vortex spring is clamped on the webbing pulley positioning sleeve, and the other end of the vortex spring is clamped on the edge of the webbing pulley. The magnetically adjustable resistance device therein has these problems. Summary of the Invention

[0003] Design purpose: In order to avoid the shortcomings of the background technology, a resistance adjustment brake device and its use method are designed, which not only has a large resistance adjustment range and high resistance adjustment accuracy, but also has various resistance adjustment means, a simple structure, and good stability.

[0004] Design plan: To achieve the above design objectives.

[0005] 1. A fixed shaft is provided on the frame and the fixed shaft is arranged parallel to the core shaft in the rotating core shaft assembly. A rotating sleeve is installed on the upper end of the fixed shaft. A transmission part is provided between the rotating sleeve and the core shaft. When the core shaft rotates, the transmission part can drive the rotating sleeve to rotate around the fixed shaft. An elastic sliding part is provided on the shaft body of the fixed shaft and the elastic sliding part is located below the rotating sleeve. A lower magnetic part is provided on the elastic sliding part, and an upper magnetic part arranged opposite to the lower magnetic part is provided on the rotating sleeve. The design that the elastic sliding part can drive the lower magnetic part downward when the wire puller is pulled and the elastomer in the elastic sliding part is compressed is one of the technical features of the present invention. The purpose of this design is that: the user rotates the knob to send an instruction to the controller, and the controller controls the operation of the wire puller according to the instruction. At this time, the motor in the wire puller further reels or unwinds the wire under the control of the controller; when the wire is further reeled, the sleeve in the elastic sliding part moves down along the fixed axis under the action of the wire tension, and at this time, the sleeve drives the lower magnetic part to move downward together to achieve resistance reduction operation, and at the same time, the elastic part in the elastic sliding part is compressed; when the wire is further reeled, the sleeve in the elastic sliding part moves up along the fixed axis under the action of the restoring force of the elastic body, and at this time, the sleeve drives the lower magnetic part The resistance-increasing operation is realized by moving upward together, which is not only convenient to use and operate (good human-computer interaction), but also simple and reliable in structure (reducing both production costs and the probability of failure). At the same time, the magnetic resistance adjustment range is large (it can increase or decrease the number of magnets on the upper magnetic part and / or the lower magnetic part to change the attraction between the upper magnetic part and the lower magnetic part, thereby greatly adjusting the magnetic resistance) and the precision is good (when the attraction between the upper magnetic part and the lower magnetic part is determined, the user can achieve small and precise fine-tuning of the magnetic resistance by adjusting the distance between the upper magnetic part and the lower magnetic part).

[0006] 2. The design of a non-magnetic metal plate mounted on the lower end surface of the annular plate, or a non-magnetic metal plate mounted on the upper end surface of the annular mounting plate, is the second technical feature of the present invention. This design is intended to prevent contact and attraction between the annular plate and the annular mounting plate, thereby preventing the resistance adjustment brake device from malfunctioning or even being damaged.

[0007] 3. The third technical feature of the present invention is that the fixed shaft is provided with a stopper located between the rotating sleeve and the elastic sliding member. This design is intended to prevent the annular plate and the annular mounting plate from contacting and attracting each other.

[0008] 4. The elastic sliding part includes a sleeve and an elastomer. The through hole of the sleeve is in a "convex" shape and the diameter of the narrow hole in the "convex" shaped through hole matches the diameter of the fixed shaft. The diameter of the wide hole in the "convex" shaped through hole matches the outer diameter of the elastomer and the inner diameter of the elastomer matches the diameter of the fixed shaft. The sleeve and the elastomer are respectively mounted on the fixed shaft and the elastomer is located below the sleeve. The lower end face of the elastomer contacts the upper end face of the frame bottom plate and the upper end face contacts the top face of the wide hole. At this time, the elastomer provides support for the sleeve in the vertical direction. The upper end of the sleeve is provided with a lower magnetic attraction part, which is the fourth technical feature of the present invention. The purpose of this design is: since the diameter of the narrow hole in the "convex" shaped through hole matches the diameter of the fixed shaft, this can ensure that the sleeve can move up and down smoothly along the fixed shaft (the sleeve moves down along the fixed shaft under the pulling of the wire puller, and moves up along the fixed shaft under the action of the restoring force of the elastic body). In addition, the diameter of the wide hole in the "convex" shaped through hole matches the outer diameter of the elastomer, and the lower end face of the elastomer contacts the upper end face of the frame bottom plate, and the upper end face contacts the top face of the wide hole. At this time, the elastomer provides support for the sleeve in the vertical direction, so that the sleeve and the elastomer will not be mechanically stuck during the movement of the sleeve up and down along the fixed shaft, ensuring tens of thousands of repeated uses.

[0009] 5. The outer side of the sliding sleeve is provided with a wire fixing device, and the bottom plate of the frame is provided with a limiter, and the limiter is located directly below the wire fixing device. This is the fifth technical feature of the present invention. The purpose of this design is that the wire hole in the limiter and the wire hole in the wire fixing device are arranged to ensure that the wire can pull the sliding sleeve vertically downward when the wire pulling device reels the wire. Since the pulling force is relatively small, the output power of the motor can be reduced, and the vertical downward pulling force will not form a horizontal force component, thereby ensuring the service life of the elastomer. Moreover, the wire fixing device and the limiter are both simple in structure and reasonable in layout, which are not only reliable in use but also low in production cost. At the same time, the blocking plate in the limiter can limit the sliding sleeve during the downward movement of the sliding sleeve, thereby avoiding the problem that the sliding sleeve is excessively downward, which at best reduces the service life of the elastomer, and at worst damages both the sliding sleeve and the elastomer.

[0010] 6. A linear bearing is fixedly mounted at the upper end of the through hole of the sliding sleeve and is located within the through hole. The through hole of the linear bearing forms a "convex"-shaped through hole with the lower through hole section of the through hole that communicates with it. The aperture of the linear bearing through hole matches the diameter of the fixed shaft. After the sliding sleeve is mounted on the fixed shaft, the lower end face of the linear bearing contacts the upper end face of the elastomer. This is the sixth technical feature of the present invention. The purpose of this design is to ensure that the friction between the fixed shaft and the linear bearing after they are plugged in and fit together and when they slide relative to each other is rolling friction. This not only reduces the frictional resistance between the two (reducing the output power consumption of the motor in the wire puller), but also reduces the amount of noise generated when the sliding sleeve moves, while improving the smoothness of the sliding sleeve's movement.

[0011] 7. The transmission member includes a first flywheel and a conveyor belt, the first flywheel being fixedly mounted on the upper end of the mandrel and being connected to the second flywheel in the rotating sleeve via the conveyor belt, and the second flywheel having a smaller diameter than the first flywheel. This design is the seventh technical feature of the present invention. The purpose of this design is to increase the output of magnetic resistance and thereby achieve multi-faceted resistance adjustment (resistance adjustment can be achieved by varying the number of magnets on the upper and / or lower magnetic members, by varying the spacing between the upper and lower magnetic members, and by varying the ratio of the diameters of the second and first flywheels, with adjustment being possible by selecting one of these methods, by combining two of these methods, or even by combining all three).

[0012] Technical Solution 1: A resistance adjustment braking device comprises a frame, a wire puller and a rotating core shaft assembly, wherein the wire puller and the rotating core shaft assembly are installed on the frame, a fixed shaft is provided on the frame and the fixed shaft is arranged parallel to the core shaft in the rotating core shaft assembly, a rotating sleeve is installed on the upper end of the fixed shaft, a transmission member is provided between the rotating sleeve and the core shaft, and when the core shaft rotates, the transmission member can drive the rotating sleeve to rotate around the fixed shaft, an elastic sliding member is provided on the shaft body of the fixed shaft and the elastic sliding member is located below the rotating sleeve, a lower magnetic member is provided on the elastic sliding member, and an upper magnetic member arranged opposite to the lower magnetic member is provided on the rotating sleeve, and when the wire puller pulls, the elastic sliding member can drive the lower magnetic member downward and the elastomer in the elastic sliding member is compressed.

[0013] Technical Solution 2: A method for using a resistance adjustment brake device, which includes a knob and a controller. The user rotates the knob to send an instruction to the controller, and the controller controls the operation of the wire puller according to the instruction. At this time, the motor in the wire puller further reels or unwinds the wire under the control of the controller; when the wire is further reeled, the sleeve in the elastic sliding part moves downward along the fixed axis under the action of the wire tension, and at this time, the sleeve drives the lower magnetic part downward to achieve a resistance reduction operation. At the same time, the elastic part in the elastic sliding part is compressed; when the wire is further reeled, the sleeve in the elastic sliding part moves upward along the fixed axis under the action of the restoring force of the elastic body, and at this time, the sleeve drives the lower magnetic part upward to achieve a resistance increase operation.

[0014] Compared with the background technology, the present invention has the following advantages: first, the resistance adjustment brake device has a large resistance adjustment range, high resistance adjustment accuracy, and diverse resistance adjustment means; second, the resistance adjustment brake device has a simple structure, low production cost, and good stability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the resistance adjustment brake device (the pull wire is not drawn).

[0016] Figure 2 It is a schematic diagram of the main structure of the resistance adjustment brake device (the pull wire is not drawn).

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure after the fixed shaft, rotating sleeve and elastic sliding part are assembled.

[0018] Figure 4 It is a schematic diagram of the main structure after the fixed shaft, rotating sleeve and elastic sliding part are assembled.

[0019] Among them: frame 1, wire puller 2, rotating core shaft assembly 3, core shaft 31, fixed shaft 4, rotating sleeve 5, second flywheel 51, two bearings 52, transmission part 6, first flywheel 61, conveyor belt 62, elastic sliding part 7, sliding sleeve 71, elastic body 72, lower magnetic part 8, upper magnetic part 9, non-magnetic metal plate 10, limiting blocking part 11, wire pull fixture 12, wire hole 121, notch 122, limiter 13, blocking plate 131, wire hole 132, notch 133. DETAILED DESCRIPTION

[0020] Example 1: Refer to the attached Figure 1-Figure 4. The resistance adjusting braking device includes a frame 1, a wire puller 2 and a rotating core shaft assembly 3. The wire puller 2 and the rotating core shaft assembly 3 are prior art and are not described here. The wire puller 2 and the rotating core shaft assembly 3 are installed on the frame 1. A fixed shaft 4 is provided on the frame 1 and the fixed shaft 4 is arranged parallel to the core shaft 31 in the rotating core shaft assembly 3. The fixed shaft 4 is vertically installed on the bottom plate of the frame 1 through a fixing part. A rotating sleeve 5 is installed on the upper end of the fixed shaft 4. A transmission part 6 is provided between the rotating sleeve 5 and the core shaft 31. When the core shaft 31 rotates, the transmission part 6 can drive the rotating sleeve 5 to rotate around the fixed shaft 4. An elastic sliding part 7 is provided on the shaft body of the fixed shaft 4 and the elastic sliding part 7 is located below the rotating sleeve 5. A lower magnetic part 8 is provided on the elastic sliding part 7. An upper magnetic part 9 is provided on the rotating sleeve 5 opposite to the lower magnetic part 8. When the wire puller 2 pulls, the elastic sliding part 7 can drive the lower magnetic part 8 downward and the elastic body 72 in the elastic sliding part 7 is compressed.

[0021] The upper magnetic member 9 is an annular plate and the annular plate is a magnetic metal plate, the lower magnetic member 8 is an annular mounting plate and the annular mounting plate is made of a magnet, and the magnetic metal plate is an iron plate; or the upper magnetic member 9 is an annular plate and the annular plate is made of a magnet, the lower magnetic member 8 is an annular mounting plate and the annular mounting plate is a magnetic metal plate, and the magnetic metal plate is an iron plate; or the upper magnetic member 9 is an annular plate and the annular plate is made of a magnet, and the lower magnetic member 8 is an annular mounting plate and the annular mounting plate is made of a magnet; when the upper magnetic member 9 is made of a magnet, it can be made directly from a magnet, or it can be formed by multiple magnetic blocks installed on a mounting plate. The advantage of the lower magnetic member 8 or the upper magnetic member 9 being formed by multiple magnetic blocks installed on a mounting plate is that such a structure not only has low production costs, but also the user can adjust the attraction of the magnetic member by increasing or decreasing the number of magnetic blocks. A non-magnetic metal plate 10 is mounted on the lower end surface of the annular plate, or a non-magnetic metal plate 10 is mounted on the upper end surface of the annular mounting plate. The non-magnetic metal plate 10 is an aluminum plate. A stopper 11 is provided on the fixed shaft 4 and is located between the rotating sleeve 5 and the elastic sliding member 7. The stopper 11 is a retaining spring. The retaining spring prevents contact and adsorption between the lower magnetic member 8 and the upper magnetic member 9.

[0022] The rotating sleeve 5 includes a second flywheel 51 and two bearings 52. The second flywheel 51 is mounted on the upper end of the fixed shaft 4 through the two bearings 52. The lower end of the second flywheel 51 is fixedly mounted with an upper magnetic component 9. When the second flywheel 51 rotates, the upper magnetic component 9 rotates around the fixed shaft 4 together with the second flywheel 51; the second flywheel 51 and the first flywheel 61 have the same horizontal height.

[0023] The elastic sliding member 7 includes a sleeve 71 and an elastic body 72. The sleeve 71 has a through hole in the shape of a convex character, and the diameter of the narrow hole in the convex-shaped through hole matches the diameter of the fixed shaft 4. The diameter of the wide hole in the convex-shaped through hole matches the outer diameter of the elastic body 72, and the inner diameter of the elastic body 72 matches the diameter of the fixed shaft 4. The sleeve 71 and the elastic body 72 are respectively mounted on the fixed shaft 4, and the elastic body 72 is located below the sleeve 71. The lower end surface of the elastic body 72 contacts the upper end surface of the bottom plate of the frame 1, and the upper end surface contacts the top surface of the wide hole. At this time, the elastic body 72 provides vertical support for the sleeve 71. The upper end of the sleeve 71 is provided with a lower magnetic member 8. The elastic body 72 is a spring.

[0024] The outer side surface of the sliding sleeve 71 is provided with a wire fixing device 12, and the bottom plate of the frame 1 is provided with a limiter 13 and the limiter 13 is located directly below the wire fixing device 12. The wire fixing device 12 is a Z-shaped plate, which is fixedly mounted on the sliding sleeve 71 by screws, and a wire hole 121 is provided on the upper end surface of the lower horizontal plate in the Z-shaped plate, and the wire hole 121 passes through the upper and lower end surfaces of the lower horizontal plate, and a notch 122 is provided on the outer side of the lower horizontal plate, and the notch 122 and the wire hole 121 are mutually connected, and the limiter 13 is an L-shaped plate, and the horizontal plate in the L-shaped plate is fixedly connected to the bottom plate of the frame 1 by screws, and a blocking plate 131 is fixedly mounted on the upper end of the vertical plate in the L-shaped plate, and a wire hole 132 is provided on the upper end surface of the blocking plate 131, and the wire hole 132 passes through the blocking plate. The upper and lower end surfaces of the plate 131, the outer side of the blocking plate 131 is provided with a notch 133 and the notch 133 and the wire hole 132 are interconnected, the Z-shaped plate is located above the blocking plate 131 and the wire hole 132 and the notch 133 are opposite to the wire hole 121 and the notch 122, one end of the pulling wire is fixed on the pulling wire fixture 12 and the pulling wire passes through the wire hole 121 and the wire hole 132 vertically downward in turn, and the other end is fixedly mounted on the wire puller 2, the wire puller 2 can reel in and unreel the pulling wire (using the motor in the wire puller 2 to rotate forward or reverse), the wire hole 13 2 and the setting of the wire hole 121 ensure that the wire can pull the sliding sleeve 71 vertically downward when the wire puller 2 reels the wire. Since the pulling force is small, the output power of the motor can be reduced, and the vertical downward pulling force will not form a horizontal force component. The horizontal force component will form a horizontal stress on the elastic body 72 (spring), which will accelerate the shortening of the service life of the elastic body 72 (spring). The setting of the notch 133 and the notch 122 allows the wire to pass through the notch 133 and the notch 122 and enter the wire hole 132 and the wire hole 121 from the side, which is convenient for wire pulling. Installation and maintenance, at the same time, the wire fixing device 12 and the limiter 13 are both simple in structure and reasonable in layout, which not only have good reliability in use but also have low production cost. In addition, during the downward movement of the sliding sleeve 71, the blocking plate 131 can limit the sliding sleeve 71 (when the blocking plate 131 contacts the lower end surface of the lower horizontal plate in the Z-shaped plate), avoiding the sliding sleeve 71 from moving downward excessively, which may reduce the service life of the elastic body 72 at the least, and damage both the sliding sleeve 71 and the elastic body 72 at the worst. A plurality of transition wheels for wire steering and support can also be set between the limiter 13 and the wire puller 2 to ensure smooth movement of the wire.

[0025] A linear bearing is fixedly installed at the upper end of the through hole of the sliding sleeve 71 and the linear bearing is located in the through hole. The through hole of the linear bearing and the lower through hole section of the communicating through hole form a "convex" shaped through hole. The aperture of the through hole of the linear bearing matches the diameter of the fixed shaft 4. After the sliding sleeve 71 is installed on the fixed shaft 4, the lower end face of the linear bearing contacts the upper end face of the elastomer 72.

[0026] The transmission member 6 includes a first flywheel 61 and a conveyor belt 62. The first flywheel 61 is fixedly mounted on the upper end of the core shaft 31 and the first flywheel 61 and the second flywheel 51 in the rotating sleeve 5 are connected by the conveyor belt 62. The conveyor belt 62 is a belt. The diameter of the second flywheel 51 is smaller than the diameter of the first flywheel 61.

[0027] Example 2: Based on Example 1. A method for using a resistance adjustment brake device includes a knob and a controller. By rotating the knob, the user can instruct the controller to adjust the magnetic resistance to different levels. The controller can be an existing PLC controller or an existing single-chip microcomputer controller. The user rotates the knob to send instructions to the controller. The controller controls the wire puller 2 to work according to the instructions. At this time, the motor in the wire puller 2 further reels or unwinds the wire under the control of the controller; when the wire is further reeled, the sleeve 71 in the elastic sliding member 7 moves downward along the fixed shaft 4 under the action of the wire tension. At this time, the sleeve 71 drives the lower magnetic member 8 downward to achieve a resistance reduction operation. At the same time, the elastic body 72 in the elastic sliding member 7 is compressed; when the wire is further reeled, the sleeve 71 in the elastic sliding member 7 moves upward along the fixed shaft 4 under the action of the restoring force of the elastic body 72. At this time, the sleeve 71 drives the lower magnetic member 8 upward to achieve a resistance increase operation.

[0028] It should be understood that although the above embodiments provide a relatively detailed textual description of the design ideas of the present invention, these textual descriptions are only simple textual descriptions of the design ideas of the present invention, rather than limitations on the design ideas of the present invention. Any combination, addition or modification that does not exceed the design ideas of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A resistance adjustment brake device, comprising a frame, a wire puller, and a rotating mandrel assembly, wherein the wire puller and the rotating mandrel assembly are mounted on the frame, and wherein: The frame is provided with a fixed shaft and the fixed shaft is arranged parallel to the core shaft in the rotating core shaft assembly. A rotating sleeve is installed on the upper end of the fixed shaft. A transmission member is provided between the rotating sleeve and the core shaft. When the core shaft rotates, the transmission member can drive the rotating sleeve to rotate around the fixed shaft. The transmission member includes a first flywheel and a conveyor belt. The rotating head cover includes a second flywheel. The first flywheel is fixedly mounted on the upper end of the core shaft and the first flywheel and the second flywheel in the rotating sleeve are connected by a conveyor belt. An elastic sliding part is provided on the shaft body of the fixed shaft and the elastic sliding part is located below the rotating sleeve. A lower magnetic part is provided on the elastic sliding part, and an upper magnetic part is provided on the rotating sleeve opposite to the lower magnetic part. When the wire puller pulls the lower elastic sliding part, it can drive the lower magnetic part downward vertically and the elastomer in the elastic sliding part is compressed.

2. The resistance-adjusting brake device according to claim 1, characterized in that: The upper magnetic component is an annular plate and the annular plate is a magnetic metal plate, and the lower magnetic component is an annular mounting plate and the annular mounting plate is made of a magnet; or the upper magnetic component is an annular plate and the annular plate is made of a magnet, and the lower magnetic component is an annular mounting plate and the annular mounting plate is a magnetic metal plate; or the upper magnetic component is an annular plate and the annular plate is made of a magnet, and the lower magnetic component is an annular mounting plate and the annular mounting plate is made of a magnet.

3. The resistance-adjusting brake device according to claim 2, characterized in that: A non-magnetic metal plate is installed on the lower end surface of the annular plate, or a non-magnetic metal plate is installed on the upper end surface of the annular mounting plate.

4. The resistance-adjusting brake device according to claim 1, wherein: A position-limiting blocking piece is provided on the fixed shaft and is located between the rotating sleeve and the elastic sliding piece.

5. The resistance-adjusting brake device according to claim 1, characterized in that: The rotating sleeve includes a second flywheel and two bearings. The second flywheel is mounted on the upper end of the fixed shaft through the two bearings. An upper magnetic component is fixedly mounted on the lower end of the second flywheel. When the second flywheel rotates, the upper magnetic component rotates around the fixed shaft together with the second flywheel.

6. The resistance-adjusting brake device according to claim 1, characterized in that: The elastic sliding part includes a sliding sleeve and an elastomer, the through hole of the sliding sleeve is in a "convex" shape, and the diameter of the narrow hole in the "convex" shaped through hole matches the diameter of the fixed shaft, the diameter of the wide hole in the "convex" shaped through hole matches the outer diameter of the elastomer, and the inner hole diameter of the elastomer matches the diameter of the fixed shaft; the sliding sleeve and the elastomer are respectively mounted on the fixed shaft and the elastomer is located below the sliding sleeve, the lower end face of the elastomer contacts the upper end face of the frame bottom plate, and the upper end face contacts the top surface of the wide hole, at this time the elastomer provides support for the sliding sleeve in the vertical direction, and the upper end of the sliding sleeve is provided with a lower magnetic attraction part.

7. The resistance-adjusting brake device according to claim 6, characterized in that: A wire fixing device is provided on the outer side surface of the sliding sleeve, and a limiter is provided on the bottom plate of the frame and the limiter is located directly below the wire fixing device.

8. The resistance-adjusting brake device according to claim 6, characterized in that: A linear bearing is fixedly installed at the upper end of the through hole of the sliding sleeve and the linear bearing is located in the through hole. The through hole of the linear bearing and the lower through hole section of the communicating through hole form a "convex" shaped through hole. The aperture of the through hole of the linear bearing matches the diameter of the fixed shaft. After the sliding sleeve is installed on the fixed shaft, the lower end face of the linear bearing contacts the upper end face of the elastomer.

9. The resistance-adjusting brake device according to claim 1, characterized in that: The diameter of the second flywheel is smaller than the diameter of the first flywheel.

10. A method for using the resistance-adjusting brake device according to claim 6, comprising a knob and a controller, wherein: The user rotates the knob to send an instruction to the controller, and the controller controls the operation of the wire puller according to the instruction. At this time, the motor in the wire puller will further reel in or unreel the wire under the control of the controller; when the wire is further reeled in, the sleeve in the elastic sliding part moves downward along the fixed axis under the action of the wire tension, and at this time the sleeve drives the lower magnetic part downward to achieve a resistance reduction operation, and at the same time the elastic part in the elastic sliding part is compressed; when the wire is further reeled in, the sleeve in the elastic sliding part moves upward along the fixed axis under the action of the restoring force of the elastic body, and at this time the sleeve drives the lower magnetic part upward to achieve a resistance increase operation.

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