Magnetic control resistance mechanism of exercise bicycle

Abstract

The utility model discloses a magnetic control resistance mechanism of an exercise bicycle, which comprises a support, a flywheel and an arc-shaped magnet seat, and a magnet is arranged on the magnet seat. The device is characterized in that a first sleeve and a second sleeve are arranged on the magnet base at intervals, a first through hole and a second through hole are formed in the support, the first sleeve is arranged in the first through hole and fixed to a nut through a bolt, the second sleeve is rotatably arranged in the second through hole, and the first sleeve is located above the second sleeve; the support is further provided with a guide groove, one end of the guide groove in the length direction is connected with the first through hole, the other end of the guide groove in the length direction is an opening, and the guide groove is used for guiding the first sleeve to slide out of the first through hole. Compared with the prior art, the magnet part on the magnet base is rotated to the outside of the support, the magnet is convenient to replace, the whole magnet base does not need to be taken down, the replacement operation steps are simplified, and convenience and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness facilities, in particular to a magnetically controlled resistance mechanism of a fitness bike. Background Art

[0002] With the popularization of healthy lifestyle, quick response exercises and competitions play an important role in sports training and recreational activities. Exercise bikes are also called power bikes. Ordinary exercise bikes can adjust the intensity of exercise to achieve fitness effects, so people call them exercise bikes. Aerobic fitness equipment that simulates typical outdoor sports is also called cardiopulmonary training equipment. It mainly promotes cardiovascular exercise, speeds up metabolism, and enhances heart and lung function through longer periods of time and appropriate intensity exercise, thereby improving human physique.

[0003] The magnetic control wheel is a common resistance generating mechanism for fitness bikes, which provides resistance for fitness bikes through electromagnetic induction. The common magnetic control wheel currently uses a motor reluctance, and the motor reluctance works by first accelerating the torque on the rotating shaft of the fitness bike through an accelerator, and then transferring it to the reluctance motor, and then the reluctance motor converts the energy of the fitness bike into electrical energy, which is converted into the heat energy of the stator and rotor on the reluctance motor and other resistors. This reluctance has the disadvantages of complex structure, high cost, unstable resistance value, easy damage and difficult maintenance. For example, a magnetic control wheel using permanent magnets to provide resistance is disclosed in the Chinese patent with publication number CN205832474 U, which provides magnetic resistance by permanent magnets so as to provide magnetic resistance more smoothly, but this magnetic control wheel still has certain defects in use, such as: the defect that the magnet is inconvenient to replace and difficult to disassemble and assemble, and when the magnetic force needs to be changed, the magnet seat can only be removed from the bracket by time-consuming and laborious work and then the magnet is replaced, which greatly reduces the user experience. Utility Model Content

[0004] In order to solve the technical problems in the prior art such as the inconvenience of replacing magnets of a magnetically controlled resistance mechanism of an exercise bike, which results in difficulty in adjusting the magnetic resistance, the utility model provides a magnetically controlled resistance mechanism of an exercise bike.

[0005] The technical solution adopted by the utility model is: a magnetically controlled resistance mechanism of a fitness bike, including a bracket, a flywheel, and an arc-shaped magnet seat, wherein a magnet is provided on the magnet seat, a first sleeve and a second sleeve are provided on the magnet seat at intervals, a first through hole and a second through hole are provided on the bracket, the first sleeve is provided in the first through hole and fixed by bolts, the second sleeve is rotatably provided in the second through hole, and the first sleeve is located above the second sleeve; the bracket is also provided with a guide groove for guiding the first sleeve to slide out of the first through hole, one end of the guide groove in the length direction is connected to the first through hole, and the other end of the guide groove in the length direction is an open mouth.

[0006] Furthermore, the bracket includes a pair of identical supporting side plates, the flywheel and the magnet seat are both arranged between the two supporting side plates, and the supporting side plates are provided with a plurality of third through holes, and the third through holes are used for bolt connection between the two supporting side plates.

[0007] Furthermore, the guide groove is provided on the inner side of the supporting side plate, the guide groove is arc-shaped, and the lowest end of the horizontal position of the first through hole is lower than the end of the guide groove communicating with the first through hole.

[0008] Furthermore, an arc-shaped groove is provided at the upper end of the supporting side plate, the rotating shaft of the flywheel is arranged in the arc-shaped groove, a fourth through hole is provided on the circumferential side of the arc-shaped groove, and the magnetically controlled resistance mechanism also includes a shaft end cover, the shaft end cover is arranged on the outer side of the arc-shaped groove, and the shaft end cover is bolted to the fourth through hole, and the rotating shaft is rotatably arranged in the shaft end cover.

[0009] Furthermore, a bearing chamber is provided in the shaft end cover, a bearing is nested in the rotating shaft, and the bearing is arranged in the bearing chamber.

[0010] Furthermore, the magnet seat is provided with a plurality of magnetic attraction positions for magnetically attracting the magnet.

[0011] Preferably, the magnet is a neodymium iron boron magnet.

[0012] Furthermore, the inner arc side of the magnet seat is opposite to the flywheel, and the first sleeve and the second sleeve are arranged on the outer arc side of the magnet seat.

[0013] Compared with the prior art, the design of the utility model is more flexible and easier to maintain than the magnetically controlled resistance mechanism of traditional fitness bikes, making it easier to replace magnets, and at the same time, the adjustment of the magnetic resistance is more precise and smooth. First, the fixed constraints on the bracket are removed so that the magnet can move freely. This step is to create conditions for subsequent operations and ensure that the magnet can slide smoothly and disengage from the guide groove. The position of the magnet is slightly adjusted so that it slides out of the guide groove to the outside of the bracket, allowing the magnet part on the magnet seat to rotate to the outside of the bracket, thereby facilitating the replacement of the magnet without removing the entire magnet seat, simplifying the replacement operation steps and improving convenience and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the novel magnetic control resistance mechanism in the utility model from the first viewing angle;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the novel magnetically controlled resistance mechanism in the utility model from a second viewing angle;

[0017] Figure 3 This is a schematic diagram of the explosion structure of the new magnetically controlled resistance mechanism in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the supporting side plate in the utility model.

[0019] The main figures in this application are:

[0020] 1. Bracket; 2. Flywheel; 3. Magnet seat; 4. Magnet; 5. First sleeve; 6. Second sleeve; 11. First through hole; 12. Second through hole; 13. Guide groove; 14. Support side plate; 15. Third through hole; 16. Arc groove; 17. Fourth through hole; 7. Shaft end cover; 21. Rotating shaft; 71. Bearing chamber. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] In the following description, with reference to the accompanying drawings, several embodiments of the present application are described. It should be understood that other embodiments may also be used, and mechanical composition, structure, electrical and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used here are only to describe specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., may be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0023] This application proposes a utility model. This utility model relates to a magnetically controlled resistance mechanism of a fitness vehicle. Figure 1 , 2 As shown, it includes a bracket 1, a flywheel 2, an arc-shaped magnet seat 3 and other key components.

[0024] In this new design, the Figures 1 to 3As shown, the magnet seat 3 has an arc structure and is equipped with a magnet 4 to achieve the magnetic control resistance adjustment of the flywheel 2 by the magnetic field. The first sleeve 5 and the second sleeve 6 are arranged at intervals on the magnet seat 3, and the bracket 1 is also provided with a first through hole 11 and a second through hole 12 accordingly, wherein the first sleeve 5 is fixed in the first through hole 11 by bolts and nuts, and the second sleeve 6 can rotate in the second through hole 12, so that the first sleeve 5 is located above the second sleeve 6, thereby achieving the adjustment of the magnetic resistance. In addition, a guide groove 13 is also provided on the bracket 1, one end of which is connected to the first through hole 11 in the length direction, and the other end is an open mouth for guiding the first sleeve 5 to slide out of the first through hole 11, thereby facilitating the maintenance and replacement of the magnet 4. The inner arc side of the magnet seat 3 is opposite to the flywheel 2, and the first sleeve 5 and the second sleeve 6 are arranged on the outer arc side of the magnet seat 3, to ensure the effective transmission of the magnetic field and the regulation of the magnetic resistance.

[0025] Furthermore, if Figure 3 , 4 As shown, the design of the bracket 1 adopts a pair of identical supporting side plates 14, the flywheel 2 and the magnet seat 3 are arranged between the two supporting side plates 14, and a plurality of third through holes 15 are provided on the supporting side plates 14 for bolting the two supporting side plates 14 to ensure the stability and bearing capacity of the bracket 1. An arc-shaped guide groove 13 is provided on the inner side of the supporting side plate 14. The design of this guide groove 13 helps to guide the first sleeve 5 to slide out of the first through hole 11, so as to facilitate the replacement of the magnet 4.

[0026] In addition, the lowest horizontal end of the first through hole 11 on the supporting side plate 14 is lower than the end of the guide slot 13 connected to the first through hole 11. This design can ensure that when the magnet 4 is replaced, the first sleeve 5 can slide out of the guide slot 13 smoothly, and make the entire operation smoother and more convenient, reducing the difficulties and risks that may be caused by improper operation. The design of the bracket 1 takes into account the structure and function of the supporting side plate 14, and reasonably sets the connection points and the guide slot 13 to better support and maintain the magnetic control resistance mechanism of the fitness bike. This bracket 1 design can not only improve the stability and service life of the equipment, but also facilitate users to perform maintenance operations, ensuring the long-term normal operation and performance of the equipment.

[0027] Furthermore, combined with Figure 3 , 4As shown, the design of the supporting side plate 14 also includes an arc-shaped groove 16 for supporting the rotating shaft 21 of the flywheel 2. Specifically, the arc-shaped groove 16 is located at the upper end of the supporting side plate 14, and a fourth through hole 17 is provided on the circumferential side for connecting with the shaft end cover 7. The rotating shaft 21 of the flywheel 2 is arranged in the arc-shaped groove 16, and is connected to the supporting side plate 14 through the shaft end cover 7 to ensure the stability and smooth operation of the rotating shaft 21. The shaft end cover 7 is arranged on the outside of the arc-shaped groove 16, and is connected to the fourth through hole 17 by bolts, so that the rotating shaft 21 is rotatably arranged in the shaft end cover 7. A bearing chamber 71 is provided inside the shaft end cover 7, and the rotating shaft 21 is nested with a bearing to ensure that the rotating shaft 21 can achieve smooth rotation with the support of the bearing. The bearing is placed in the bearing chamber 71, which plays a role in supporting and reducing friction, helping to reduce energy loss and improve the efficiency of rotation. This design enables the rotating shaft 21 of the flywheel 2 to be well supported in the arc-shaped groove 16, and to achieve stable rotation through the action of the bearing. At the same time, the connection structure of the shaft end cover 7 also ensures the stability and reliability of the entire system, and improves the service life and performance of the equipment.

[0028] Preferably, the magnet seat 3 is provided with a plurality of magnetic positions for magnetically attracting the magnet 4, which means that positions are designed on the magnet seat 3 specifically for attracting and fixing the magnet 4, so as to ensure that the magnet 4 can be firmly fixed on the magnet seat 3 and is not easy to fall off or move. This design helps to ensure the stability and reliability of the magnet 4 during movement.

[0029] In the preferred design, the magnet 4 is a neodymium iron boron magnet, which is a common high-performance permanent magnetic material with high magnetic energy product and magnetic energy density, and can provide a strong magnetic field. The use of neodymium iron boron magnets in the magnetic control resistance mechanism can ensure that sufficient magnetic force is obtained in a small volume, thereby achieving precise magnetic resistance adjustment and stable motion control.

[0030] Compared with the traditional magnetic resistance mechanism of fitness bikes, the design of the utility model is more flexible and easy to maintain, making it easier to replace the magnets, while the adjustment of the magnetic resistance is more precise and stable. This innovative design can not only improve the service life and stability of the fitness bike, but also enhance the user's fitness experience, meet the training requirements under different needs, and has a high market application prospect and economic benefits.

[0031] When the magnet needs to be replaced, first remove the fixed constraints of the first sleeve 5 and the bracket 1 so that the first sleeve 5 can move freely. This step is to create conditions for subsequent operations and ensure that the first sleeve 5 can slide smoothly and disengage from the guide groove 13. Slightly adjust the position of the first sleeve 5 so that it slides out of the guide groove 13 to the outside of the bracket 1. By fine-tuning the position of the first sleeve 5, it can be smoothly freed from the constraints of the guide groove 13 and slide outward to the outside of the bracket 1. At this time, the second sleeve 6 does not need to be moved, but only needs to remain in a rotating state. During the movement of the first sleeve 5, by keeping the second sleeve 6 rotating, the magnet seat 3 can produce a certain rotational movement relative to the bracket 1. Through the continuous rotation of the second sleeve 6, one side of the magnet 4 installed on the magnet seat 3 can be rotated to the outside of the bracket 1, which is convenient for replacement.

[0032] The main principle of this replacement solution is to adjust the position of the first sleeve 5 and keep the second sleeve 6 rotating, so that the magnet 4 on the magnet seat 3 can be partially rotated to the outside of the bracket 1, so that the magnet 4 can be easily replaced without removing the entire magnet seat 3, simplifying the replacement operation steps and improving the convenience and efficiency of the operation. This replacement solution not only makes the process of replacing the magnet 4 more convenient and faster, but also reduces the risk of damage caused by disassembling the entire magnet seat 3, and improves the maintainability and durability of the equipment. Through this innovative design, users can more easily maintain and maintain the magnetic resistance mechanism of the fitness bike to ensure the long-term stable operation of the equipment.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetically controlled resistance mechanism for a fitness bike, comprising a bracket, a flywheel, and an arc-shaped magnet seat, wherein a magnet is provided on the magnet seat, characterized in that: A first sleeve and a second sleeve are provided on the magnet seat at intervals, a first through hole and a second through hole are provided on the bracket, the first sleeve is provided in the first through hole and fixed by bolts, the second sleeve is rotatably provided in the second through hole, and the first sleeve is located above the second sleeve; the bracket is also provided with a guide groove for guiding the first sleeve to slide out of the first through hole, one end of the guide groove in the length direction is connected to the first through hole, and the other end of the guide groove in the length direction is an open mouth.

2. The magnetic control resistance mechanism according to claim 1, characterized in that: The bracket includes a pair of identical supporting side plates, the flywheel and the magnet seat are both arranged between the two supporting side plates, and the supporting side plates are provided with a plurality of third through holes, and the third through holes are used for bolt connection between the two supporting side plates.

3. The magnetic control resistance mechanism according to claim 2, characterized in that: The guide groove is provided on the inner side of the supporting side plate. The guide groove is arc-shaped, and the lowest end of the horizontal position of the first through hole is lower than the end of the guide groove communicating with the first through hole.

4. The magnetic control resistance mechanism according to claim 2, characterized in that: An arc-shaped groove is also provided at the upper end of the supporting side plate, and the rotating shaft of the flywheel is arranged in the arc-shaped groove. A fourth through hole is provided on the circumferential side of the arc-shaped groove. The magnetically controlled resistance mechanism also includes a shaft end cover, which is arranged on the outer side of the arc-shaped groove, and the shaft end cover is bolted to the fourth through hole, and the rotating shaft is rotatably arranged in the shaft end cover.

5. The magnetic control resistance mechanism according to claim 4, characterized in that: A bearing chamber is arranged in the shaft end cover, a bearing is nested in the rotating shaft, and the bearing is arranged in the bearing chamber.

6. The magnetic control resistance mechanism according to claim 1, characterized in that: The magnet seat is provided with a plurality of magnetic attraction positions for magnetically attracting the magnet.

7. The magnetic control resistance mechanism according to claim 1, characterized in that: The magnet is a neodymium iron boron magnet.

8. The magnetic control resistance mechanism according to claim 1, characterized in that: The inner arc side of the magnet seat is opposite to the flywheel, and the first sleeve and the second sleeve are arranged on the outer arc side of the magnet seat.

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