CN213347619U - Support transmission device suitable for bicycle is ridden at a slow speed - Google Patents

Abstract

The utility model relates to a support transmission device suitable for bicycle is ridden at a slow speed, including frame, support arm, ejector pin, roller bearing, reducing gear box and drive wheel, the one end of support arm articulates in the frame, the other end of support arm is equipped with two ejector pins that set up relatively, fixes the rear wheel axle of bicycle on the support arm through the ejector pin, the roller bearing contacts with the bicycle wheel and transmits the moment of torsion, the roller bearing is connected with the reducing gear box, the reducing gear box is connected with the drive wheel through belt and belt pulley, the drive wheel is installed in the frame; the reduction gearbox comprises a box body and a multi-stage transmission gear arranged inside the box body, wherein the multi-stage transmission gear is a plastic gear. The utility model discloses adopt belt drive's mode to connect between reducing gear box and the drive shaft, utilize the characteristic that the belt overload skidded to protect the reducing gear box not receive the damage, consequently the reducing gear box can adopt plastic gear train, can further alleviate device weight to reduction in production cost.

Description

Support transmission device suitable for bicycle is ridden at a slow speed

Technical Field

The utility model relates to a body-building apparatus field, more specifically say, relate to a support transmission suitable for bicycle rides at a slow speed.

Background

Under the background of advocating sports fitness by people today, many people own home fitness equipment. The existing running machine and the spinning bike are the first choice of most people, however, when the running machine, the spinning bike and other equipment are used for body building, the equipment is fixed, multiple people cannot compete, and the interest of competitive competition is lacked.

Chinese patent CN104826322B discloses a bicycle deceleration training device. However, the speed reduction scheme adopts a design scheme of one-level gear transmission and one-level chain transmission, and has the defects of small speed reduction ratio, large volume and high cost.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in providing a support transmission who is applicable to bicycle rides at a slow speed, its reducing gear box adopts multistage plastic gear to slow down, and is small, and the deceleration ratio is high, and is with low costs.

The utility model provides a technical scheme that its technical problem adopted is: a supporting transmission device suitable for a bicycle to ride at a slow speed is constructed and comprises a rack, a supporting arm, ejector rods, a rolling shaft, a reduction box and a driving wheel, wherein one end of the supporting arm is hinged to the rack, the other end of the supporting arm is provided with the two ejector rods which are oppositely arranged, a rear wheel axle of the bicycle is fixed on the supporting arm through the ejector rods, the rolling shaft is in contact with a bicycle wheel and transmits torque, the rolling shaft is connected with the reduction box, the reduction box is connected with the driving wheel through a belt and a belt pulley, and the driving wheel is installed on the rack; the input end of the reduction gearbox is directly connected with the roller through a key, the output end of the reduction gearbox is connected with the belt pulley through a key, the reduction gearbox comprises a box body and a multi-stage transmission gear arranged inside the box body, and the multi-stage transmission gear is a plastic gear.

In the above scheme, the reduction ratio of the reduction gearbox is 243-729 times, the multi-stage transmission gear comprises a first gear shaft, a second gear shaft, a third gear shaft, a fourth gear shaft, a fifth gear shaft and a sixth gear shaft which are sequentially meshed, and bearings are arranged at two ends of each gear shaft.

In the scheme, an adjusting rod is further arranged between the rack and the supporting arm, a first support is arranged on the supporting arm, a second support is arranged on the rack, a threaded hole shaft with a threaded hole is arranged on the first support, a blind hole shaft with a blind hole is arranged on the second support, an external thread is arranged on the adjusting rod, and one end of the adjusting rod penetrates through the threaded hole of the threaded hole shaft and is inserted into the blind hole of the blind hole shaft.

In the scheme, the frame is provided with the auxiliary wheels.

In the scheme, the width of the auxiliary wheel is 180-220 mm.

In the above scheme, the ejector rod comprises a handle, a rod sleeve, a screw rod and a clamping groove seat, the screw rod penetrates through the rod sleeve to be connected with the clamping groove seat, and a rear shaft nut of the bicycle is clamped through the clamping groove seats on the two sides.

In the above scheme, the slot seat and the rod sleeve are rotatably connected.

Implement the utility model discloses a support transmission suitable for bicycle rides at a slow speed has following beneficial effect:

1. the rear axle of the bicycle is fixed on the supporting arm through the ejector rod, the tire is pressed on the rotating shaft by gravity, when a person steps on the pedal to drive the rear wheel to move, the rear wheel transmits torque to the rotating shaft through friction force, the rotating shaft transmits the torque to the multi-stage gear of the reduction gearbox, the belt pulley is fixed at one output end of the gear box, power is transmitted to the driving shaft through the belt, and then the driving wheel connected to the driving shaft drives the whole device to slowly advance. The reduction gearbox is connected with the driving shaft in a belt transmission mode, and the reduction gearbox is protected from being damaged by the aid of the characteristic that a belt is overloaded and skidded, so that the reduction gearbox can adopt a plastic gear set, the weight of the device can be further reduced, and production cost is reduced.

2. The utility model discloses the reducing gear box adopts 5 grades or 6 grades of speed reductions, and the deceleration ratio reaches 243 supplyes 729 doubly, and the reducing gear box input is directly connected with the key-type with the roller bearing, has avoided unnecessary structure and power loss.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic structural view of a support transmission device suitable for a bicycle to ride at a slow speed;

FIG. 2 is an exploded schematic view of the part of FIG. 1;

fig. 3 is a cross-sectional view of the inventive device;

FIG. 4 is an exploded schematic view of the parts of the reduction gearbox;

FIG. 5 is a schematic structural view of a magnetic damping mechanism;

FIG. 6 is a schematic view of the support transmission mechanism of the present invention for a bicycle riding at a slow speed;

fig. 7 is a schematic view of the device of the present invention when turned upwards.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in figures 1-6, the device for realizing the function of outdoor exercise of the bicycle in a narrow space comprises a frame 2, a supporting arm 1, a mandril 4, a rolling shaft 5, a reduction box 15 and a driving wheel 7.

One end of the supporting arm 1 is hinged on the frame 2, the other end of the supporting arm 1 is provided with two opposite push rods 4, and a rear wheel axle of the bicycle is fixed on the supporting arm 1 through the push rods 4. The transmission structure is positioned inside the first shell 18 and the second shell 19 and comprises a roller 5, a reduction gearbox 15 and a driving wheel 7, the roller 5 is in contact with a bicycle wheel and transmits torque, the roller 5 is connected with the reduction gearbox 15, the reduction gearbox 15 is connected with the driving wheel 7 through a belt 6 and a belt pulley 16, the driving wheel 7 is installed on the rack 2, and the inertia flywheel 9 is fixed at one end of the roller 5. The input end of the reduction box 15 is connected with the roller 5 through a key, and the output end of the reduction box 15 is connected with the belt pulley 16 through a key. The reduction gear box 15 has the reduction ratio of 243-729 times, and comprises a box body 28 and a multi-stage transmission gear arranged inside the box body 28, wherein the multi-stage transmission gear comprises a first gear shaft 29, a second gear shaft 30, a third gear shaft 31, a fourth gear shaft 32, a fifth gear shaft 33 and a sixth gear shaft 34 which are sequentially meshed, and bearings 35 are arranged at two ends of each gear shaft. The reduction gearbox 15 is connected with the driving shaft in a belt 6 transmission mode, and the reduction gearbox 15 is protected from being damaged by the overload and slip characteristic of the belt 6, so that the plastic gear set is adopted in the embodiment of the reduction gearbox 15, the weight of the device can be further reduced, and the production cost is reduced.

The utility model discloses the device is when using, at first is connected with the rear axle of ordinary bicycle, and the rear wheel and the roller bearing 5 contact of bicycle, when riding, exert the effort to the pedal, drive roller bearing 5 and rotate when the rear wheel rotates, drive wheel 7 through reducing gear box 15 and belt drive's mode and rotate, and the speed of normally riding reduces substantially through reducing gear box 15 to realize that the bicycle moves ahead at a slow speed and removes. The reduction ratio of the reduction gearbox 15 is more than 700 times, and the normal riding speed can be greatly reduced, so that the aim of only riding for one circle at home after half an hour of movement is achieved. Through setting up inertia flywheel 9 and making the inertia that can reach when riding from the normal driving and ride, guarantee the smooth and easy of the motion of riding.

The bicycle advances the in-process, because self has certain kinetic energy, this kinetic energy can keep the stability and the smooth and easy degree of riding, even at the in-process of riding, the power on the pedal reduces to some extent, and the motion state of bicycle can not change suddenly yet, but change and steadily change according to the dynamics on the pedal. By utilizing the point, the utility model discloses increase an inertia flywheel on the roller bearing. Kinetic energy generated by high-speed rotation of the inertia flywheel is equivalent to riding kinetic energy, and the effect of simulating riding is achieved.

Taking a 20-inch bicycle ridden by a 70kg person as an example:

the weight of the vehicle is 10 Kg;

the total mass m =70+10=80kg of the person and the vehicle;

the riding speed of the 20-inch bicycle is generally 10-15km/h, and 10 km/h =10/3.6=2.7 m/S;

kinetic energy of bicycle advancing: e =1/2mv 2=1/2 × 80 × 2.7^2= 291J;

the inertia flywheel of the utility model is designed with the inertia J = 3600kg.mm ^ 2;

measuring the rotating speed Wn =3500r/min =366rad/s of the inertia flywheel during riding at the same speed;

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

considering that the utility model discloses speed is low, and kinetic energy that gos forward can neglect.

The formula E is approximately equal to W, so that the scheme is almost as smooth as a naturally-ridden bicycle, and the real bicycle can be completely simulated.

Further, still be equipped with between frame 2 and the support arm 1 and adjust pole 3, be equipped with first support on the support arm 1, be equipped with the second support on the frame 2, be equipped with the screw hole axle 22 of taking the screw hole on the first support, be equipped with the blind hole axle 23 of taking the blind hole on the second support, be equipped with the external screw thread on adjusting pole 3, adjust the screw hole of screw hole axle 22 and insert in the blind hole of blind hole axle 23 of pole 3 one end. Through the angle between the adjustable support arm 1 of rotation regulation pole 3 and frame 2 to the wheel of adaptation different grade type reduces tire and roller bearing 5's pressure, adjusts the resistance, avoids riding the difficulty.

Further, be equipped with auxiliary wheel 8 on the frame 2, auxiliary wheel 8 width is 180~220mm, and preferred 200mm both can prevent that the bicycle from empting, make the bicycle have certain space of swaying again, more is close the actual scene of riding.

Further, the utility model discloses the device still includes magnetic damping mechanism, and magnetic damping mechanism includes red copper ring 10, fixing base 12, rubidium magnet 11, guide arm 13, spring 14 and regulating switch 17, and rubidium magnet 11 is installed on fixing base 12, and fixing base 12 slidable mounting is on guide arm 13, and it has spring 14 that supports fixing base 12 to still overlap on the guide arm 13, and inertia flywheel 9 drives red copper ring 10 and rotates, and regulating switch 17 passes through wire rope and is connected with fixing base 12.

In an initial state, the spring 14 pushes the fixing seat 12 to slide to the lowest end of the guide rod 13, at the moment, the rubidium magnet 11 is in a completely disengaged state outside the red copper ring 10, at the moment, no magnetic resistance exists, the adjusting switch 17 is adjusted, the steel wire rope pulls the fixing seat 12 to move upwards, the rubidium magnet 11 and the red copper ring 10 are close to each other, the red copper ring 10 rotating along with the inertia flywheel 9 cuts magnetic induction lines to generate current, eddy current is generated inside the red copper ring 10 to consume energy so as to provide resistance, when the rubidium magnet 11 and the red copper ring 10 are completely overlapped, the magnetic flux passing through the red copper ring 10 is maximum at the moment, and the generated current and the generated resistance are maximum values. The copper sheet and the rare earth permanent magnet are used through the eddy current effect, the effect of the uphill resistance is achieved by applying the resistance, and more riding scenes are achieved.

Further, a detachable base 20 is arranged at the lower end of the frame 2. Lifting the drive wheel 7 by the mounting base 20 can cause the drive wheel 7 to lose lift from the ground, thereby achieving the effect of being stationary and usable. At the moment, the bicycle can be used as a spinning bicycle and a bicycle, and can meet the requirement of functional diversity of a customer.

Further, the ejector rod 4 comprises a handle 25, a rod sleeve 24, a screw rod 26 and a clamping groove seat 27, the screw rod 26 penetrates through the rod sleeve 24 to be connected with the clamping groove seat 27, and a rear axle nut of the bicycle is clamped through the clamping groove seats 27 on the two sides, so that the bicycle is fixed. The slot seat 27 and the rod sleeve 24 are rotatably connected, and when the device is not used, the device can be turned upwards, and the device can be directly turned up to be hung at the rear of a bicycle, as shown in fig. 7, and the dismounting step is omitted.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (7)

1. A supporting transmission device suitable for a bicycle to ride at a low speed is characterized by comprising a rack, a supporting arm, ejector rods, a rolling shaft, a reduction box and a driving wheel, wherein one end of the supporting arm is hinged to the rack, the other end of the supporting arm is provided with the two ejector rods which are oppositely arranged, a rear wheel shaft of the bicycle is fixed on the supporting arm through the ejector rods, the rolling shaft is in contact with a bicycle wheel and transmits torque, the rolling shaft is connected with the reduction box, the reduction box is connected with the driving wheel through a belt and a belt pulley, and the driving wheel is installed on the rack; the input end of the reduction gearbox is in key connection with the roller, the output end of the reduction gearbox is in key connection with the belt pulley, the reduction gearbox comprises a box body and a multi-stage transmission gear arranged inside the box body, and the multi-stage transmission gear is a plastic gear.

2. The support transmission device for low-speed riding of the bicycle as claimed in claim 1, wherein the reduction ratio of the reduction box is 243-729 times, the multi-stage transmission gear comprises a first gear shaft, a second gear shaft, a third gear shaft, a fourth gear shaft, a fifth gear shaft and a sixth gear shaft which are meshed in sequence, and bearings are arranged at two ends of each gear shaft.

3. The support transmission device for the slow riding of the bicycle according to claim 1, wherein an adjusting rod is further arranged between the frame and the supporting arm, a first support is arranged on the supporting arm, a second support is arranged on the frame, a threaded hole shaft with a threaded hole is arranged on the first support, a blind hole shaft with a blind hole is arranged on the second support, an external thread is arranged on the adjusting rod, and one end of the adjusting rod penetrates through the threaded hole of the threaded hole shaft and is inserted into the blind hole of the blind hole shaft.

4. A support transmission adapted for use in connection with the slow cycling of a bicycle according to claim 1, wherein said frame is provided with an auxiliary wheel.

5. A support transmission adapted for use in the low speed cycling of a bicycle according to claim 4, wherein said auxiliary wheel has a width of 180-220 mm.

6. The support transmission device for the slow riding of the bicycle according to claim 1, wherein the top rod comprises a handle, a rod sleeve, a screw rod and a slot seat, the screw rod penetrates through the rod sleeve to be connected with the slot seat, and a rear shaft nut of the bicycle is clamped through the slot seats at two sides.

7. A support transmission adapted for use with a bicycle for riding at a slower speed as described in claim 6 wherein said slotted seat and lever sleeve are rotatably connected.

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