Pedaling drive device of a fitness bike with a self-powered flywheel

Abstract

The present invention discloses a pedaling drive device for a fitness bike with a self - generating flywheel, which includes a bracket rotatably fitted with an input shaft. One end of the input shaft is fixed to a driving disc connected with an internal gear ring. A sun gear is rotatably fitted on the input shaft inside the driving disc. A plurality of planetary guide wheels concentric with the sun gear and evenly arranged along the circumference are rotatably fitted on the bracket. An arc - shaped guide block located between two adjacent planetary guide wheels is also fixed on the bracket. Part of the teeth of an annular synchronous belt are meshed with the sun gear, and part of the smooth surface of the annular synchronous belt is tightened by the plurality of planetary guide wheels and the arc - shaped guide blocks to be in a state of meshing with the internal gear ring. A flywheel is rotatably fitted at the other end of the input shaft. The first central hole of the flywheel disc is connected to the sun gear through a one - way bearing. There is a magnetic ring as a rotor and a stator coil cooperating with it on the flywheel. The pedaling drive part of this device has low noise, low wear and relatively high power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of fitness equipment, and specifically relates to a pedaling drive device for a fitness bike with a self-generating flywheel. Background Art

[0002] The pedaling drive flywheel device of a fitness bike is a relatively mature technology, with various types and different structures. Among them, the pedaling drive device with a planetary gear structure has a relatively compact structure and a relatively small volume.

[0003] However, in the drive device with a planetary gear structure of the prior art, the meshing of the sun gear and the planetary gears is the meshing of rigid gears with each other, resulting in relatively high noise and relatively large wear, which to a certain extent affects the service life of the pedaling drive device. Some can generate electricity by using the rotation of the flywheel while exercising. Generally speaking, however, after the pedaling stops, the power generation of the flywheel also stops accordingly, and the power generation power is relatively low. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pedaling drive device for a fitness bike with a self-generating flywheel, which has low noise, small wear in the pedaling drive part, and relatively high power generation power.

[0005] The technical solution of the present invention is to provide a pedaling drive device for a fitness bike with a self-generating flywheel, including a bracket rotatably fitted with an input shaft;

[0006] One end of the input shaft is fixed to a drive disc connected with an internal gear ring; a sun gear is rotatably fitted on the input shaft inside the drive disc; a plurality of planetary guide wheels concentric with the sun gear and evenly arranged along the circumference are rotatably fitted on the bracket. Part of the teeth of an annular synchronous belt are meshed with the sun gear, and part of the smooth surface of the annular synchronous belt is tightened by the plurality of planetary guide wheels to be in a state of meshing with the internal gear ring;

[0007] A flywheel is rotatably fitted at the other end of the input shaft. The first central hole of the flywheel disc is connected to the sun gear through a one-way bearing. A magnetic ring serving as a rotor is fixed on the inner circumference of the outer ring of the flywheel. A circular stator coil for the inner circular hole of the magnetic ring on the flywheel to rotate around its outer circumference for power generation is fixed on an end cover far from the planetary guide wheels and connected to the bracket.

[0008] Pedaling the pedal drives the input shaft to rotate, so that the internal gear ring drives the sun gear to rotate at an increased speed through the annular synchronous belt. The rotation of the sun gear drives the flywheel to rotate; when the pedal is stopped from being pedaled, the input shaft stops rotating, and the flywheel continues to rotate and generate electricity under the action of inertia until the inertia force is eliminated and the rotation and power generation stop.

[0009] After adopting the above structure, the pedaling drive device for a fitness bike with a self-generating flywheel of the present invention has the following advantages:

[0010] Stepping on the pedal drives the input shaft to rotate for fitness while generating electricity. The generated electricity can be directly supplied to external electrical equipment or first stored in a power storage device and then supplied to external electrical equipment. The driving wheel and the flywheel are coaxially and parallelly arranged, and the planetary gear transmission structure makes the structure of this device relatively compact and small in size.

[0011] In particular, a flexible synchronous belt is used to increase or accelerate the rotation of the internal gear ring and transmit it to the sun gear. The speed increase effect is good, which can improve the power generation efficiency. Coupled with the cooperation structure of the flywheel magnet ring and the stator coil, the stepping drive device of this fitness bike with a self-generating flywheel has low noise and small wear, and greatly improves the service life of the device.

[0012] The first central hole of the flywheel disc is connected to the sun gear through a one-way bearing. When the stepping drive input shaft rotates, the sun gear rotates to drive the flywheel to rotate. When stepping stops, the input shaft stops rotating while the flywheel continues to rotate and generate electricity under the action of inertia until the inertia force is eliminated and it stops rotating and generating electricity, and its power generation power is relatively high.

[0013] Furthermore, an arc-shaped guide block is also fixed on the bracket between two adjacent planetary guide wheels. Part of the smooth surface of the annular synchronous belt is also tightened by multiple arc-shaped guide blocks to a state of meshing with the internal gear ring. After adopting the above structure, an arc-shaped guide block is arranged between two adjacent planetary guide wheels, which can make part of the shape of the annular synchronous belt closer to a circle, increase its circumference, increase the tooth number ratio between the gears on the annular synchronous belt and the sun gear, and further improve the speed increase effect.

[0014] Furthermore, the bracket is a vertical rectangular bracket. Inside a vertical plate of the bracket, there is a U-shaped frame screwed to the bracket by multiple first screws. Multiple planetary guide wheels arranged evenly along the circumference are rotationally matched on their respective planetary shafts through their respective first double-direction rolling bearings. One end of each planetary shaft is fixed on the U-shaped frame, and a pressing plate for preventing axial displacement of the respective first double-direction rolling bearing is fixed on the other end of each planetary shaft. The center of the pressing plate has a second central hole for the input shaft to pass through. After adopting the above structure, it can not only ensure that this device has the above technical effects, but also make the transmission mechanism in the driving wheel easy to install, and the installation structure is firm, and the transmission process is stable, flexible and reliable.

[0015] Furthermore, the front view of the U-shaped frame shows a U shape, and the side view shows a rectangle at the top and bottom and a circle in the middle; each arc-shaped guide block is screwed to the circular plate in the middle of the U-shaped frame by multiple second screws, and the center of the circular plate has a third central hole for the sun gear to pass through. After adopting the above structure, it further ensures the technical effects that this device is easy to install, has a firm installation structure, and the transmission process is stable, flexible and reliable.

[0016] Further, on the outer sides of the two vertical plates of the bracket, there are respective bearing seats fixed by a plurality of third screws, and both ends of the input shaft are rotationally fitted on the respective bearing seats through respective second double-direction rolling bearings. After adopting the above structure, the connection between the input shaft and the bracket is firmer, and the rotation is more stable, flexible and reliable.

[0017] Further, one end of the first central hole of the flywheel disc away from the sun gear is rotationally fitted with the input shaft through a third double-direction rolling bearing. After adopting the above structure, the rotation of the flywheel relative to the input shaft is more stable, flexible and reliable, and its inertia force is stronger.

[0018] Further, the fourth central hole of the sun gear is rotationally fitted with the input shaft through a fourth double-direction rolling bearing. After adopting the above structure, the rotation of the sun gear relative to the input shaft is more stable, flexible and reliable.

[0019] Further, the edge of the driving disc is screwed and fixed to the internal gear ring by a plurality of fourth screws evenly distributed along the circumference. After adopting the above structure, the connection is firm, and the installation or disassembly of the transmission mechanism in the driving wheel is more convenient.

[0020] Further, there are three of the planetary guide wheels; and there are two of the arc-shaped guide blocks. After adopting the above structure, it not only ensures the technical effects of low noise, low wear, increased service life of the device, and the stability and reliability of the speed increase of the sun gear by the internal gear ring through the synchronous belt, but also makes the installation or disassembly of the transmission mechanism more convenient. Description of the Drawings

[0021] Figure 1 is the overall structure schematic diagram of the device of the present invention Figure 1 。

[0022] Figure 2 is the overall structure schematic diagram of the device of the present invention Figure 2 。

[0023] Figure 3 is the overall structure schematic diagram of the device of the present invention Figure 3 。

[0024] Figure 4 is the exploded structure schematic diagram of the flywheel, the left part of the bracket, the bearing seat and the input shaft in the device of the present invention Figure 1 (In the figure, the correct position of the driving disc should be inside the right vertical plate of the bracket, but it is shown outside for convenience in the figure. The same applies to the following Figure 5 、 Figure 6 ).

[0025] Figure 5 is the exploded structure schematic diagram of the flywheel, the left part of the bracket, the bearing seat and the input shaft in the device of the present invention Figure 2 。

[0026] Figure 6Exploded structure schematic of the flywheel, left part of the bracket, bearing seat and input shaft in the device of the present invention Figure 3 。

[0027] Figure 7 Exploded structure schematic of the drive wheel, right part of the bracket, bearing seat and input shaft in the device of the present invention Figure 1 。

[0028] Figure 8 Exploded structure schematic of the drive wheel, right part of the bracket, bearing seat and input shaft in the device of the present invention Figure 2 。

[0029] Figure 9 Is Figure 8 The enlarged structure schematic of the leftmost component in

[0030] Figure 10 Exploded structure schematic of the drive wheel, right part of the bracket, bearing seat and input shaft in the device of the present invention Figure 3 。

[0031] Figure 11 Is Figure 10 The enlarged structure schematic of the U-shaped frame exploded in

[0032] As shown in the figure: 1. Bracket, 2. Flywheel, 3. End cover, 4. Input shaft, 5. Fifth screw, 6. First screw, 7. Drive wheel, 8. Third screw, 9. Polygonal column, 10. Vertical plate, 11. U-shaped frame, 12. Internal gear ring, 13. Drive disc, 14. Fourth screw, 15. Bearing seat, 16. Second double-direction rolling bearing, 17. Circular stator coil, 18. Flywheel disc, 19. One-way bearing, 20. Third double-direction rolling bearing, 21. First central hole, 22. Magnetic ring, 23. Planet shaft, 24. Pressure plate, 25. Ring-shaped synchronous belt, 26. Sun gear, 27. Planet guide wheel, 28. Arc-shaped guide block, 29. Second central hole, 30. Fourth central hole, 31. First double-direction rolling bearing, 32. Fourth double-direction rolling bearing, 33. Circular plate, 34. Third central hole. Specific embodiments

[0033] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted here that the description of these specific embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the following specific embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0034] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5, Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 as shown.

[0035] The pedaling drive device of the fitness bike with self - generating flywheel according to the present invention includes a bracket 1 rotatably fitted with an input shaft 4. One end of the input shaft 4 is fixed to a drive disc 13 connected with an internal gear ring 12, such as by key or welding. A sun gear 26 is rotatably fitted on the input shaft 4 inside the drive disc 13. A plurality of planetary guide wheels 27 that are concentric with the sun gear 26 and evenly arranged along the circumference are rotatably fitted on the bracket 1. An arc - shaped guide block 28 located between two adjacent planetary guide wheels 27 is also fixed on the bracket 1. Part of the teeth of an annular synchronous belt 25 mesh with the sun gear 26, and part of the smooth surface of the annular synchronous belt 25 is tightened by the plurality of planetary guide wheels 27 and the plurality of arc - shaped guide blocks 28 to be in a state of meshing with the internal gear ring 12. By pedaling the pedal, the input shaft 4 is driven to rotate, so that the internal gear ring 12 drives the sun gear 26 to increase speed through the annular synchronous belt 25. The above - mentioned drive disc 13 and internal gear ring 12 can also be collectively referred to as a drive wheel 7.

[0036] A flywheel 2 is rotatably fitted at the other end of the input shaft 4. The first central hole 21 of the flywheel disc 18 is connected to the sun gear 26 through a one - way bearing 19. A magnetic ring 22 serving as a rotor is fixed on the inner circumference of the outer ring of the flywheel 2. A circular stator coil 17 for the inner circular hole of the magnetic ring 22 on the flywheel 2 to rotate around its outer circumference to generate electricity is fixed on an end cover 3 that is far from the planetary guide wheels 27 and connected to the bracket 1. When the pedal is pedaled to drive the input shaft 4 to rotate, the sun gear 26 rotates to drive the flywheel 2 to rotate. When the pedal is stopped being pedaled, the input shaft 4 stops rotating, while the flywheel 2 continues to rotate and generate electricity under the action of inertia until the inertia force is eliminated and it stops rotating and generating electricity. The above - mentioned connection to the end cover 3 on the bracket 1 also means being fixed on the end cover 3 of the bracket 1. The flywheel 2 can be understood to include the flywheel disc 18, the magnetic ring 22 and the circular stator coil 17. It is not difficult to understand that there is a through - hole in the center of the end cover 3 for the input shaft 4 to pass through.

[0037] The bracket 1 is a vertical rectangular bracket 1. Inside a vertical plate 10 of the bracket 1, there is a U - shaped frame 11 screwed to the bracket 1 by a plurality of first screws 6. A plurality of planetary guide wheels 27 evenly arranged along the circumference are rotatably fitted on their respective planetary shafts 23 through their respective first double - row rolling bearings 31. One end of each planetary shaft 23 is fixed, such as by welding, to the U - shaped frame 11. A pressing plate 24 for preventing the axial displacement of the respective first double - row rolling bearings 31 is fixed, such as by screwing, to the other end of each planetary shaft 23. There is a second central hole 29 in the center of the pressing plate 24 for the input shaft 4 to pass through.

[0038] The front view of the U-shaped frame 11 shows a U shape, and the side view shows a rectangle at the upper and lower parts and a circle in the middle. Each arc-shaped guide block 28 is screwed to the circular plate 33 in the middle of the U-shaped frame 11 through a plurality of, such as two, second screws. There is a third central hole 34 in the center of the circular plate 33 for the sun gear 26 to pass through.

[0039] It is not difficult to understand that there is a gap between the flywheel disc 18 and the U-shaped frame 11.

[0040] On the outer sides of the two vertical plates 10 of the bracket 1, there are respective bearing seats 15 fixed by a plurality of third screws 8. The two ends of the input shaft 4 are rotationally fitted in the respective bearing seats 15 or within the bearing seats 15 through respective second double-direction rolling bearings 16.

[0041] One end of the first central hole 21 of the flywheel disc 18 far from the sun gear 26 is rotationally fitted with the input shaft 4 through a third double-direction rolling bearing 20. The first central hole 21 of the flywheel disc 18 can also be expressed as the first central hole 21 of the flywheel 2.

[0042] The fourth central hole 30 of the sun gear 26 is rotationally fitted with the input shaft 4 through a fourth double-direction rolling bearing 32.

[0043] The edge of the drive disc 13 is screwed and fixed to the end face of the internal gear ring 12 through a plurality of fourth screws 14 evenly distributed along the circumference. That is, there are a plurality of threaded holes on this end face. The fourth screws 14 pass through a plurality of through holes on the edge of the drive disc 13 and are screwed into the threaded holes one by one and tightened.

[0044] The described planetary guide wheels 27 are preferably three. The described arc-shaped guide blocks 28 are preferably two.

[0045] Both outer ends of the input shaft 4 are polygonal columns 9 that match the polygonal holes at the corners of the pedals. Fifth screws 5 for axially limiting the corners are screwed into the threaded holes at both ends of the polygonal columns 9.

[0046] A screw is also called a screw or a bolt.

[0047] The working principle of this device is generally as follows: Step on the left and right pedals to drive the input shaft 4 to rotate, drive the internal gear ring 12 to rotate through the drive disc 13, the internal gear ring 12 meshes with the annular synchronous belt 25 and drives the sun gear 26 to rotate at an increased speed (that is, when the internal gear ring 12 rotates one circle, the sun gear 26 can rotate several circles or even more than a dozen circles), the sun gear 26 drives the flywheel 2 to rotate through the one-way bearing 19, and the magnetic ring 22 fixed on the inner circumference of the outer ring of the flywheel 2 and the circular stator coil 17 fixed on the end cover 3 of the flywheel 2 generate a magnetic field to generate electricity. When stepping on the pedals stops, the input shaft 4 stops rotating while the flywheel 2 continues to rotate and generate electricity under the action of inertia until the inertia force is eliminated and the rotation and power generation stop.

[0048] Components, structures, quantities, etc. not marked above are not shown in the drawings. The drawings are only schematic. If there are any inconsistencies between the drawings and the written description, or among the drawings themselves, the written description shall prevail.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pedaling drive device for a fitness bike with a self - generating flywheel, comprising a bracket rotatably fitted with an input shaft, Characterized in that: One end of the input shaft is fixed to a drive disc connected with an internal gear ring; a sun gear is rotatably fitted on the input shaft inside the drive disc; a plurality of planetary guide wheels, which are concentric with the sun gear and evenly arranged along the circumference, are rotatably fitted on the bracket; part of the teeth of an annular synchronous belt are meshed with the sun gear, and part of the smooth surface of the annular synchronous belt is tightened by the plurality of planetary guide wheels to a state of being meshed with the internal gear ring; A flywheel is rotatably fitted at the other end of the input shaft. The first central hole of the flywheel disc is connected to the sun gear through a one - way bearing. A magnetic ring serving as a rotor is fixed on the inner circumference of the outer ring of the flywheel. A circular stator coil for generating electricity by the inner circular hole of the magnetic ring on the flywheel rotating around its outer circumference is fixed on the end cover which is far from the planetary guide wheels and connected to the bracket; An arc - shaped guide block located between two adjacent planetary guide wheels is also fixed on the bracket. Part of the smooth surface of the annular synchronous belt is also tightened by multiple arc - shaped guide blocks to a state of being meshed with the internal gear ring; The end of the first central hole of the flywheel disc far from the sun gear is rotatably fitted with the input shaft through a third bidirectional rolling bearing; Stepping on the pedal drives the input shaft to rotate, so that the internal gear ring drives the sun gear to rotate at an increased speed through the annular synchronous belt. The rotation of the sun gear drives the flywheel to rotate; when stopping stepping on the pedal, the input shaft stops rotating, while the flywheel continues to rotate and generate electricity under the action of inertia until the inertia force is eliminated and it stops rotating and generating electricity.

2. The pedaling drive device for a fitness bike with a self - generating flywheel according to claim 1, Characterized in that: The bracket is a vertical rectangular bracket. Inside one vertical plate of the bracket, there is a C - shaped frame screwed to the bracket by a plurality of first screws. A plurality of planetary guide wheels evenly arranged along the circumference are rotatably fitted on their respective planetary shafts through their respective first bidirectional rolling bearings. One end of each respective planetary shaft is fixed on the C - shaped frame, and a pressing plate for preventing the axial displacement of each respective first bidirectional rolling bearing is fixed on the other end of each respective planetary shaft. The center of the pressing plate has a second central hole for the input shaft to pass through.

3. The pedaling drive device for a fitness bike with a self - generating flywheel according to claim 2, Characterized in that: The front view of the C - shaped frame shows a C - shape, and the side view shows rectangles at the top and bottom and a circle in the middle; each arc - shaped guide block is screwed to the circular plate in the middle of the C - shaped frame by a plurality of second screws. The center of the circular plate has a third central hole for the sun gear to pass through.

4. The pedaling drive device for a fitness bike with a self - generating flywheel according to claim 1, Characterized in that: Bearing seats are fixed on the outer sides of the two vertical plates of the bracket by a plurality of third screws. Both ends of the input shaft are rotatably fitted in their respective bearing seats through their respective second bidirectional rolling bearings.

5. The pedaling drive device for a fitness bike with a self - generating flywheel according to claim 1, Characterized in that: The fourth central hole of the sun gear is rotatably fitted with the input shaft through a fourth bidirectional rolling bearing.

6. The pedaling drive device for a fitness bike with a self - generating flywheel according to claim 1, Characterized in that: The edge of the drive disc is screwed and fixed to the internal gear ring by a plurality of fourth screws evenly distributed along the circumference.

7. The pedaling drive device of the exercise bike with a self - generating flywheel according to any one of claims 1 - 3, characterized in that: there are three planetary guide wheels; and there are two arc - shaped guide blocks.

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