A device that realizes the outdoor sports function of bicycles in a small space

Abstract

The present invention relates to a device for realizing outdoor sports functions of a bicycle in a narrow space, comprising a frame, a support arm, a push rod, a transmission structure and an inertia flywheel, wherein one end of the support arm is hinged on the frame, and the other end of the support arm is provided with two push rods arranged opposite to each other, and the rear wheel axle of the bicycle is fixed on the support arm through the push rods, and the transmission structure comprises a roller, a reduction box and a driving wheel, wherein the roller contacts the bicycle wheel and transmits torque, the roller is connected to the reduction box, and the reduction box is connected to the driving wheel through a belt and a pulley, and the driving wheel is mounted on the frame, and the inertia flywheel is fixed to one end of the roller. The present invention can be used in conjunction with bicycles of various sizes and structures, and can realize slow riding in a narrow space, and the riding experience is the same as that of normal riding.

Description

Technical Field

[0001] The invention relates to the field of fitness equipment, and more particularly to a device for realizing the outdoor sports function of a bicycle in a narrow space. Background Art

[0002] In today's context of promoting exercise and fitness, many people have their own home fitness equipment. Existing treadmills and spinning bikes are the first choice for most people. However, when using treadmills, spinning bikes and other equipment for fitness, the equipment is fixed and multiple people cannot compete, which lacks the fun of competitive competition.

[0003] CN104826316B discloses a bicycle deceleration training device, but it has the following disadvantages or shortcomings:

[0004] 1. Since there are only two levels of deceleration, the reduction ratio is not enough and can only be used for outdoor training. 2. It is large in size and has high manufacturing cost. 3. The connection method is very unreliable. The distance between the center of gravity of the person riding the bicycle and the ground will not be less than 1m, and it is basically fixed at a single point, which can hardly overcome the force of the bicycle falling sideways. 4. It is not very versatile. The size and structure of 14-inch to 29-inch bicycles vary greatly, and the possibility of connecting it with most cars is almost zero. 5. The deformation of the tire on one or two rollers is very large, which causes great resistance and is difficult to ride. Aerobic exercise refers to low-intensity and rhythmic exercise, which takes a long time, about 30 minutes or more, and the exercise intensity is medium or above. It cannot be done when the riding resistance is too large. 6. The bicycle has a large inertia when riding forward. It does not have an inertia wheel that imitates the inertia of the bicycle, and basically does not feel like riding a normal bicycle. 7. It is impossible to adjust the appropriate riding resistance according to training needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device for realizing the outdoor sports function of a bicycle in a small space, which can be used in conjunction with bicycles of various sizes and structures to realize slow riding in a narrow space, and the riding experience is the same as normal riding.

[0006] The technical solution adopted by the present invention to solve its technical problem is: constructing a device for realizing the outdoor sports function of a bicycle in a narrow space, comprising a frame, a support arm, a push rod, a transmission structure and an inertia flywheel, wherein one end of the support arm is hinged on the frame, and the other end of the support arm is provided with two push rods arranged opposite to each other, and the rear wheel axle of the bicycle is fixed to the support arm through the push rods, and the transmission structure comprises a roller, a reduction box and a driving wheel, the roller contacts the bicycle wheel and transmits torque, the roller is connected to the reduction box, the reduction box is connected to the driving wheel through a belt and a pulley, the driving wheel is installed on the frame, and the inertia flywheel is fixed to one end of the roller.

[0007] In the above scheme, an adjusting rod is also provided between the frame and the support arm, a first support is provided on the support arm, a second support is provided on the frame, a threaded hole shaft with a threaded hole is provided on the first support, a blind hole shaft with a blind hole is provided on the second support, an external thread is provided on the adjusting rod, and one end of the adjusting rod passes through the threaded hole of the threaded hole shaft and is inserted into the blind hole of the blind hole shaft.

[0008] In the above solution, auxiliary wheels are provided on the frame.

[0009] The above scheme also includes a magnetic damping mechanism, which includes a copper ring, a fixing seat, a rubidium magnet, a guide rod, a spring and an adjustment switch. The rubidium magnet is installed on the fixing seat, and the fixing seat is slidably installed on the guide rod. The guide rod is also equipped with a spring that resists the fixing seat. The inertia flywheel drives the copper ring to rotate, and the adjustment switch is connected to the fixing seat through a steel wire rope.

[0010] In the initial state, the spring force pushes the fixed seat to slide to the lower end of the guide rod. At this time, the rubidium magnet is completely disengaged from the copper ring. At this time, there is no magnetic resistance. Adjust the adjustment switch, and the wire rope pulls the fixed seat upward. The rubidium magnet and the copper ring are close to each other. The copper ring rotating with the inertia flywheel cuts the magnetic flux to generate current, and generates eddy current inside the copper ring to consume energy and provide resistance. When the rubidium magnet and the copper ring are completely overlapped, the magnetic flux passing through the copper ring is the largest, and the generated current and resistance are both maximum.

[0011] In the above solution, the multi-stage transmission gears inside the reduction box are plastic gears.

[0012] In the above solution, a detachable base is provided at the lower end of the frame.

[0013] In the above scheme, the push rod comprises a handle, a rod sleeve, a screw rod and a slot seat. The screw rod passes through the rod sleeve and is connected to the slot seat. The rear axle nut of the bicycle is clamped by the slot seats on both sides.

[0014] In the above solution, the slot seat and the rod sleeve are rotatably connected.

[0015] In the above solution, the auxiliary wheel width is 180-220 mm.

[0016] The device for realizing the outdoor sports function of a bicycle in a narrow space according to the present invention has the following beneficial effects:

[0017] 1. When the device of the present invention is used, it is first connected to the rear wheel axle of an ordinary bicycle, and the rear wheel of the bicycle contacts the roller. When riding, a force is applied to the pedal, and the roller is driven to rotate when the rear wheel rotates, and the driving wheel is driven to rotate through a reduction box and a belt transmission. The normal riding speed is greatly reduced by the reduction box, so that the bicycle can move forward slowly. By setting the inertia flywheel, the inertia in normal riding can be achieved during riding, ensuring smooth riding movement.

[0018] 2. Use copper sheets and rare earth permanent magnets through the eddy current effect to apply resistance to achieve the effect of uphill resistance, realizing more riding scenarios.

[0019] 3. The reduction box and the drive shaft are connected by belt drive, and the belt overload slip characteristics are used to protect the reduction box from damage. Therefore, the reduction box can use a plastic gear set, which can further reduce the weight of the device and reduce production costs.

[0020] 4. The angle between the support arm and the frame can be adjusted by rotating the adjustment rod to adapt to different types of wheels, reduce the pressure on the tires and rollers, adjust the resistance, and avoid riding difficulties.

[0021] 5. The frame is equipped with auxiliary wheels, which can prevent the bicycle from tipping over and allow the bicycle to have a certain swing space.

[0022] 6. The lower end of the frame is equipped with a detachable base. By installing the base and raising the drive wheel, the drive wheel can be lifted off the ground and disabled, so that the bicycle can be used even when stationary. At this time, the bicycle can be used as a dynamic bicycle, a dual-purpose bicycle, which can meet the customer's requirements for functional diversity.

[0023] 7. When the device is not in use, it can be flipped upwards and directly hung on the rear of the bicycle, eliminating the need for disassembly and assembly steps.

[0024] 8. The present invention can move forward freely in a small space, complete the exercise of racing in nature or on a bicycle racetrack, increase the fun of fitness, and allow family members or partners to urge and encourage each other, thus solving the problem that fitness exercises are boring and most people cannot persist. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 It is a schematic diagram of the structure of the device of the present invention for realizing the outdoor sports function of a bicycle in a narrow space;

[0027] Figure 2 yes Figure 1 Exploded schematic diagram of parts;

[0028] Figure 3is a cross-sectional view of the device of the present invention;

[0029] Figure 4 is a structural schematic diagram of a magnetic damping mechanism;

[0030] Figure 5 Schematic diagram of the use state of the device of the present invention for realizing the outdoor sports function of a bicycle in a narrow space;

[0031] Figure 6 It is a schematic diagram of the device of the present invention when it is turned upward. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0033] like Figure 1-5 As shown, the device for realizing the outdoor sports function of a bicycle in a narrow space of the present invention comprises a frame 2, a support arm 1, a push rod 4, a transmission structure and an inertia flywheel 9.

[0034] One end of the support arm 1 is hinged on the frame 2, and the other end of the support arm 1 is provided with two oppositely arranged top rods 4, and the rear wheel axle of the bicycle is fixed on the support arm 1 through the top rods 4. The transmission structure is located inside the housing 1 18 and the housing 2 19, and includes a roller 5, a reduction box 15 and a driving wheel 7. The roller 5 contacts the bicycle wheel and transmits torque. The roller 5 is connected to the reduction box 15, and the reduction box 15 is connected to the driving wheel 7 through a belt 6 and a pulley 16. The driving wheel 7 is installed on the frame 2, and the inertia flywheel 9 is fixed to one end of the roller 5.

[0035] When the device of the present invention is used, it is first connected to the rear wheel axle of an ordinary bicycle, and the rear wheel of the bicycle contacts the roller 5. When riding, a force is applied to the pedal, and the rear wheel rotates to drive the roller 5 to rotate, and the drive wheel 7 is driven to rotate through the reduction box 15 and the belt transmission. The normal riding speed is greatly reduced by the reduction box 15, so that the bicycle can move forward slowly. The reduction ratio of the reduction box 15 is as high as more than 700 times, which can greatly reduce the normal riding speed, so as to achieve the purpose of only riding one circle at home for half an hour of exercise. By setting the inertia flywheel 9, the inertia in normal driving and riding can be achieved during riding, ensuring the smoothness of the riding movement.

[0036] During the process of the bicycle moving, since it has a certain amount of kinetic energy, this kinetic energy can maintain the stability and smoothness of riding. Even if the force on the pedals is reduced during riding, the motion state of the bicycle will not change suddenly, but will change smoothly according to the change in the force on the pedals. Taking advantage of this, the present invention adds an inertia flywheel on the roller. The kinetic energy generated by the high-speed rotation of the inertia flywheel is equivalent to the kinetic energy of riding, so as to achieve the effect of simulating riding.

[0037] Take a 70kg person riding a 20-inch bicycle as an example

[0038] The weight of the vehicle is 10 kg, and the total mass of the person and the vehicle is m = 70 + 10 = 80 kg;

[0039] The riding speed of a 20-inch bicycle is generally 10-15km / h, so 10km / h = 10 / 3.6 = 2.7m / S;

[0040] The kinetic energy of the bicycle moving forward: E = 1 / 2mv^2 = 1 / 2×80×2.7^2 = 291J;

[0041] The moment of inertia of the inertia flywheel design of the present invention is J=3600kg.mm^2;

[0042] When riding at the same speed, the speed of the inertia flywheel is measured as Wn = 3500r / min = 366rad / s;

[0043] The kinetic energy of the inertia wheel rotation W = 1 / 2Jw^2 = 1 / 2×3600×10^(-6)×366^2 = 241J;

[0044] Considering the low speed of the present invention, the forward kinetic energy can be ignored.

[0045] From the above formula E≈W, it can be seen that the smoothness of this scheme is almost the same as that of natural bicycle riding, which can completely imitate the real bicycle.

[0046] Furthermore, an adjustment rod 3 is provided between the frame 2 and the support arm 1, a first support is provided on the support arm 1, a second support is provided on the frame 2, a threaded hole shaft 22 with a threaded hole is provided on the first support, a blind hole shaft 23 with a blind hole is provided on the second support, an external thread is provided on the adjustment rod 3, one end of the adjustment rod 3 passes through the threaded hole of the threaded hole shaft 22 and is inserted into the blind hole of the blind hole shaft 23. By rotating the adjustment rod 3, the angle between the support arm 1 and the frame 2 can be adjusted to adapt to different types of wheels, reduce the pressure of the tire and the roller 5, adjust the resistance, and avoid riding difficulties.

[0047] Furthermore, the frame 2 is provided with auxiliary wheels 8, the width of which is 180-220 mm, preferably 200 mm, which can prevent the bicycle from tipping over and allow the bicycle to have a certain swing space, which is closer to the actual riding scene.

[0048] Furthermore, the device of the present invention also includes a magnetic damping mechanism, which includes a copper ring 10, a fixed seat 12, a rubidium magnet 11, a guide rod 13, a spring 14 and an adjustment switch 17. The rubidium magnet 11 is installed on the fixed seat 12, and the fixed seat 12 is slidably installed on the guide rod 13. The guide rod 13 is also provided with a spring 14 that resists the fixed seat 12. The inertia flywheel 9 drives the copper ring 10 to rotate, and the adjustment switch 17 is connected to the fixed seat 12 through a wire rope.

[0049] In the initial state, the elastic force of the spring 14 pushes the fixed seat 12 to slide to the bottom of the guide rod 13. At this time, the rubidium magnet 11 is completely disengaged from the copper ring 10. At this time, there is no magnetic resistance. Adjust the adjustment switch 17, and the steel wire rope pulls the fixed seat 12 upward. The rubidium magnet 11 and the copper ring 10 are close to each other. The copper ring 10 rotates with the inertia flywheel 9 to cut the magnetic flux lines to generate current, and eddy currents are generated inside the copper ring 10 to consume energy and provide resistance. When the rubidium magnet 11 and the copper ring 10 are completely overlapped, the magnetic flux passing through the copper ring 10 is the largest, and the generated current and resistance are both the maximum. Through the eddy current effect, copper sheets and rare earth permanent magnets are used to apply resistance to achieve the effect of uphill resistance, realizing more riding scenarios.

[0050] The reduction box 15 and the driving shaft are connected by means of a belt 6 transmission, and the overload slipping characteristic of the belt 6 is used to protect the reduction box 15 from damage. Therefore, the reduction box 15 in this embodiment uses a plastic gear set, which can further reduce the weight of the device and reduce the production cost.

[0051] Furthermore, a detachable base 20 is provided at the lower end of the frame 2. By installing the base 20 and raising the driving wheel 7, the driving wheel 7 can be lifted off the ground and disabled, thereby achieving the effect of being usable even when stationary. At this time, the bicycle can be used as a spinning bike, which can meet the customer's requirements for functional diversity.

[0052] Furthermore, the top rod 4 includes a handle 25, a rod sleeve 24, a screw 26 and a slot seat 27. The screw 26 passes through the rod sleeve 24 and is connected to the slot seat 27. The slot seats 27 on both sides clamp the rear axle nuts of the bicycle to fix the bicycle. The slot seat 27 and the rod sleeve 24 are rotatably connected. When the device is not in use, it can be flipped up and directly hung on the back of the bicycle. Figure 6 As shown, the disassembly and assembly steps are omitted.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A device for realizing the outdoor sports function of a bicycle in a narrow space, characterized in that: The invention comprises a frame, a support arm, a push rod, a transmission structure and an inertia flywheel, wherein one end of the support arm is hinged on the frame, and the other end of the support arm is provided with two push rods arranged opposite to each other, and the rear wheel axle of the bicycle is fixed on the support arm through the push rods, and the transmission structure comprises a roller, a reduction box and a driving wheel, the roller contacts the bicycle wheel and transmits torque, the roller is connected to the reduction box, the reduction box is connected to the driving wheel through a belt and a pulley, the driving wheel is installed on the frame, and the inertia flywheel is fixed on one end of the roller.

2. The device for realizing bicycle outdoor sports function in a narrow space according to claim 1, characterized in that: An adjusting rod is also provided between the frame and the supporting arm, a first support is provided on the supporting arm, a second support is provided on the frame, a threaded hole shaft with a threaded hole is provided on the first support, a blind hole shaft with a blind hole is provided on the second support, an external thread is provided on the adjusting rod, and one end of the adjusting rod passes through the threaded hole of the threaded hole shaft and is inserted into the blind hole of the blind hole shaft.

3. The device for realizing outdoor sports function of bicycle in a narrow space according to claim 1, characterized in that: The frame is provided with auxiliary wheels.

4. The device for realizing the outdoor sports function of a bicycle in a narrow space according to claim 1, characterized in that: It also includes a magnetic damping mechanism, which includes a copper ring, a fixing seat, a rubidium magnet, a guide rod, a spring and an adjustment switch. The rubidium magnet is installed on the fixing seat, and the fixing seat is slidably installed on the guide rod. The guide rod is also equipped with a spring that resists the fixing seat. The inertia flywheel drives the copper ring to rotate, and the adjustment switch is connected to the fixing seat through a steel wire rope. In the initial state, the spring force pushes the fixed seat to slide to the lower end of the guide rod. At this time, the rubidium magnet is completely disengaged from the copper ring. At this time, there is no magnetic resistance. Adjust the adjustment switch, and the wire rope pulls the fixed seat upward. The rubidium magnet and the copper ring are close to each other. The copper ring rotating with the inertia flywheel cuts the magnetic flux to generate current, and generates eddy current inside the copper ring to consume energy and provide resistance. When the rubidium magnet and the copper ring are completely overlapped, the magnetic flux passing through the copper ring is the largest, and the generated current and resistance are both maximum.

5. The device for realizing the outdoor sports function of a bicycle in a narrow space according to claim 1, characterized in that: The multi-stage transmission gears inside the reduction box are plastic gears.

6. The device for realizing outdoor sports function of bicycle in a narrow space according to claim 1, characterized in that: A detachable base is provided at the lower end of the frame.

7. The device for realizing outdoor sports function of bicycle in a narrow space according to claim 1, characterized in that: The push rod comprises a handle, a rod sleeve, a screw rod and a slot seat. The screw rod passes through the rod sleeve and is connected with the slot seat. The rear axle nuts of the bicycle are clamped through the slot seats on both sides.

8. The device for realizing the outdoor sports function of a bicycle in a narrow space according to claim 7, characterized in that: The slot seat and the rod sleeve are rotatably connected.

9. The device for realizing outdoor sports function of bicycle in a narrow space according to claim 3, characterized in that: The auxiliary wheel width is 180-220 mm.

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