阅读说明：本技术 一种自行车自动变速装置 (Automatic speed variator for bicycle ) 是由 梁子康 于 2020-05-30 设计创作，主要内容包括：本发明的目的在于设计一种自行车自动变速装置,由后轮车轴套、后车轮、齿轮盘、多级变速飞轮、固定板、齿轮轴、鼓风机齿轮、鼓风机壳体、导气管、滑杆、折叠风箱、滑动换挡传动齿轮、限位挡板、传动链条、鼓风机传动链条、金属支架、弹性金属片、鼓风叶片、微型排气口、轴承、环形凹槽、自行车架子、牙盘、弹簧等组成。后轮车轴套连接多级变速飞轮和齿轮盘,鼓风机壳体和开有微型排气口的折叠风箱连接,牙盘通过传动链条与滑动换挡传动齿轮和多级变速飞轮连接。牙盘转动带动齿轮盘转动,鼓风机齿轮随着转动,风送入折叠风箱,折叠风箱通过风压控制滑动换挡传动齿轮的滑动,传动链条随滑动换挡传动齿轮移动实现自动换挡。(The invention aims to design an automatic speed changing device of a bicycle, which comprises a rear wheel vehicle shaft sleeve, a rear wheel, a gear disc, a multi-stage speed changing flywheel, a fixing plate, a gear shaft, a blower gear, a blower shell, an air duct, a slide bar, a folding bellows, a sliding gear shifting transmission gear, a limiting baffle, a transmission chain, a blower transmission chain, a metal bracket, an elastic metal sheet, a blower blade, a micro exhaust port, a bearing, an annular groove, a bicycle frame, a chain wheel, a spring and the like. The rear wheel vehicle is connected with a multi-stage speed change flywheel and a gear disc through a shaft sleeve, a blower shell is connected with a folding air box provided with a micro exhaust port, and the gear disc is connected with a sliding gear shift transmission gear and the multi-stage speed change flywheel through a transmission chain. The chain wheel rotates to drive the gear wheel to rotate, the air blower gear rotates, air is sent into the folding air box, the folding air box controls the sliding of the sliding gear shifting transmission gear through air pressure, and the transmission chain moves along with the sliding gear shifting transmission gear to achieve automatic gear shifting.)

1. An automatic speed variator for bicycle is composed of axle sleeve of back wheel, gear disk, multi-stage speed-varying flywheel, fixing plate, gear axle, blower gear, casing of blower, air tube, slide bar, foldable bellows, slide gear, limiting baffle, drive chain of blower, metal supporter, elastic metal sheet, blower blade, miniature air outlet, air inlet, bearing, ring recess, frame of bicycle, toothed disk and spring, and features that the axle sleeve of back wheel is fixed to said axle sleeve and said gear disk, the slide bar and blower casing are connected to fixing plate, which is fixed to frame of bicycle, the foldable bellows is sealed to slide bar, one end of foldable bellows is fixed to fixing plate and another end is fixed to inner ring of bearing connected to slide gear-varying gear, and the slide gear-shifting gear is fixed to slide bar, the foldable air box is connected with the shell of the air blower through an air duct, a miniature air outlet is formed in the foldable air box, a gear disc on a shaft sleeve of the rear wheel vehicle is connected with a gear of the air blower through a transmission chain of the air blower, the gear disc is connected with a sliding gear shifting transmission gear and a multi-stage variable speed flywheel through the transmission chain, the sliding gear shifting transmission gear can slide on a sliding rod through a connected bearing, a metal support is arranged on an inner ring of the bearing fixedly connected with the sliding gear shifting transmission gear, an elastic metal sheet is fixed on the metal support, an annular groove is formed in the sliding rod, and a limit baffle is arranged at one end of the sliding rod.

2. The automatic transmission as claimed in claim 1, wherein the sliding shift gear is connected to the multi-speed flywheel through a transmission chain, and the transmission chain is driven by the sliding of the sliding shift gear to shift between different discs of the multi-speed flywheel.

3. The automatic transmission as claimed in claim 1, wherein the sliding shift drive gear slides on the sliding bar, and the elastic metal piece continuously defines the position of the sliding shift drive gear on the sliding bar by entering or exiting the annular groove as the sliding shift drive gear slides on the sliding bar.

4. The automatic transmission for bicycles of claim 1, wherein the gear shaft is fixed with the blower gear and the blower blade in the blower case, and the other end of the gear shaft is fixed with the fixing plate through a bearing.

5. The automatic transmission as claimed in claim 1, wherein said folding bellows has a tension spring therein, and is in a tightened state when no pressure air is introduced.

6. The automatic transmission as claimed in claim 1, wherein the folding bellows is connected to an inner race of a bearing to which the sliding shift transmission gear is connected, and the sliding shift transmission gear is moved by pushing the inner race of the bearing.

Technical Field

The invention relates to an automatic speed changing device of a bicycle, which can realize automatic gear change in the running process of the bicycle, improve the comfort of the bicycle in riding, improve the convenience of operation of the bicycle in riding and reduce the pain of the bicycle in riding.

Technical Field

The existing speed-changing bicycle adopts manual gear shifting and speed changing, the mechanical structure of a manual operation system is complex, and the operation is very troublesome.

Disclosure of Invention

The invention provides an automatic speed changing device for a bicycle, aiming at overcoming the defects of the gear shifting and speed changing technology of the existing speed changing bicycle. The technical scheme adopted by the invention for solving the technical problems is as follows: an automatic speed variator for bicycle is composed of axle sleeve of back wheel, gear disk, multi-stage speed-varying flywheel, fixing plate, gear axle, gear of blower, casing of blower, air tube, slide rod, foldable bellows, slide gear, limiting baffle, drive chain of blower, metal supporter, elastic metal sheet, blower blades, miniature air outlet, air inlet, bearing, annular recess, bicycle frame, toothed disk and spring. The rear wheel vehicle axle sleeve is fixedly connected with a multi-stage speed change flywheel and a gear disc and then fixedly connected with a rear wheel, a slide bar is fixed with a fixed plate, a blower shell is fixed with the fixed plate through an air duct and a folding bellows, the fixed plate is fixed on a bicycle frame, the folding bellows is hermetically penetrated on the slide bar, one end of the folding bellows is fixed on the fixed plate, the other end of the folding bellows is fixed on a bearing inner ring connected with a sliding gear shift transmission gear, the sliding gear shift transmission gear is penetrated on the slide bar, the folding bellows is connected with the blower shell through the air duct, a micro air exhaust port is arranged on the folding bellows, the gear disc on the rear wheel vehicle axle sleeve is connected with a blower gear through a blower transmission chain, a gear disc is connected with the sliding gear shift transmission gear and the multi-stage speed change flywheel through a transmission chain, the sliding gear shift transmission gear can slide on the slide bar through a connected bearing, and a metal support is arranged on the bearing inner ring fixedly connected with the sliding gear shift transmission gear, the metal support is fixed with an elastic metal sheet, an annular groove is formed in the sliding rod, and a limiting baffle is arranged at one end of the sliding rod. The gear shaft is fixed with a blower gear and a blower blade in a blower shell, the other end of the gear shaft is fixed on a fixing plate through a bearing, and the blower shell is also fixed through the fixing plate. The sliding gear shifting transmission gear can slide on the sliding rod through the bearing inner ring, and when the elastic metal sheet slides on the sliding rod along with the sliding gear shifting transmission gear, the position of the sliding gear shifting transmission gear on the sliding rod is continuously limited by entering or exiting the annular groove. A spring is arranged in the folding bellows, and the spring is in a tightening state when no pressure air enters.

When the bicycle pedal is pedaled by a person with strength, the chain wheel rotates, the chain wheel pulls the largest gear wheel of the multi-stage speed change flywheel to rotate through the transmission chain, and meanwhile, the sliding gear shifting transmission gear is pulled to rotate. The multistage speed change flywheel rotates and drives the rear wheel axle sleeve to rotate, the rear wheel axle sleeve drives the gear disc to rotate, the gear disc drives the blower gear to rotate through the blower transmission chain, the blower gear drives the blower blade in the blower shell to rotate through the connected gear shaft, and wind enters the blower shell from the air inlet and then is sent into the folding bellows from the air duct. The gear disc drives the blower gear to rotate and accelerate through the blower transmission chain, the blower gear drives the blowing blades in the blower shell to rotate and accelerate through the connected gear shaft, more air enters the blower shell from the air inlet and then is sent into the folding air box from the air duct, the folding air box overcomes the tension of the spring to stretch along with the increase of the air pressure in the folding air box, the folding air box pushes the inner ring of the bearing connected with the sliding gear-shifting transmission gear to move outwards to drive the sliding gear-shifting transmission gear to move outwards, the metal bracket on the inner ring of the bearing fixes the elastic metal sheet to slide outwards along the sliding rod and fall into the annular groove to prevent the sliding gear-shifting transmission gear from sliding, and the sliding gear-shifting transmission gear faces a second wheel disc which is slightly smaller in the multi-stage gear-shifting flywheel, the drive chain moves from the largest gear plate of the multi-stage flywheel to a slightly smaller gear plate as it is driven. At the moment, the pedaling speed and the pedaling force are kept, the blowing blade in the blower shell rotates stably, wind continuously enters the blower shell from the air inlet and then is sent into the folding air box from the air guide pipe, redundant gas is discharged from the miniature air outlet of the folding air box, the pressure in the folding air box is kept stable, the sliding gear shifting transmission gear is stabilized at the position opposite to the second wheel disc which is slightly smaller in the multi-stage speed change flywheel, and the transmission chain stably runs on the second wheel disc which is slightly smaller in the multi-stage speed change flywheel, so that the rotating speed of the rear wheel is accelerated.

The pedaling force is continuously increased, the transmission chain pulls the multistage variable speed flywheel to rotate and accelerate, the rear wheel vehicle shaft sleeve drives the gear disc to rotate and accelerate, the gear disc drives the blower gear to rotate and accelerate through the blower transmission chain, the blower gear drives the blowing blades in the blower shell to rotate and further accelerate through the connected gear shaft, more wind enters the blower shell from the air inlet and is sent into the folding air box from the air duct, along with the continuous increase of the wind pressure in the folding air box, the folding air box overcomes the pulling force of the spring to extend, the folding air box pushes the inner bearing ring connected with the sliding gear shifting transmission gear to move outwards to drive the sliding gear shifting transmission gear to move outwards, the elastic metal sheet fixed on the inner bearing ring slides outwards along the sliding rod and falls into the next annular groove, and the annular groove prevents the sliding gear shifting transmission gear shifting from sliding, the sliding gear-shifting transmission gear is opposite to a third slightly smaller wheel disc in the multi-stage speed-changing flywheel. With the rotation of the transmission chain, the transmission chain moves from a second slightly smaller wheel disc to a third slightly smaller wheel disc in the multi-stage variable speed flywheel, and the rotation speed of the rear wheel is further accelerated. Along with the increase of the pedaling force, the speed of the rear wheel is increased, the transmission chain moves from the largest wheel disc to the smallest wheel disc in the multistage variable-speed flywheel step by step, at the moment, the rotating speed of the rear wheel reaches the fastest speed, and the elastic metal sheet slides outwards to the position of the limiting baffle along the slide rod and can not move outwards any more.

When the speed of the rear wheel of the bicycle is reduced due to the reduction of the pedaling force caused by fatigue of a rider or the influence of external factors such as wind power and the like, the shaft sleeve of the rear wheel vehicle drives the gear disc to rotate and reduce the speed, the gear disc drives the blower gear to rotate and reduce the speed through the blower blade in the blower shell driven by the connected gear shaft, the air inlet enters the blower shell and is sent into the folding bellows from the air duct, the wind pressure in the folding bellows is reduced gradually, the folding bellows is influenced by the pulling force of the spring, the folding bellows pulls the inner ring of the bearing connected with the sliding gear-shifting transmission gear to move inwards to drive the sliding gear-shifting transmission gear to move inwards, the elastic metal sheet fixed on the metal bracket on the inner ring of the bearing retreats from the annular groove at the outermost side at present and then slides inwards along the slide rod to fall into the adjacent annular groove inwards, the annular groove prevents the sliding of the sliding gear shifting transmission gear, the sliding gear shifting transmission gear faces a slightly larger wheel disc in the multistage speed change flywheel, and the transmission chain moves from the smallest wheel disc in the multistage speed change flywheel to the slightly larger wheel disc along with the rotation of the transmission chain, so that the rotating speed of the rear wheel is reduced. Along with the reduction of the pedaling force, the speed of the rear wheel is reduced, the transmission chain moves from the smaller wheel disc to the larger wheel disc in the multistage variable-speed flywheel step by step, at the moment, the rotating speed of the rear wheel is reduced step by step, and the elastic metal sheet slides inwards to the leftmost position along the slide rod and can not move inwards any more.

The change of the pedaling force corresponds to the change of the rotating speed of the rear wheel and is influenced by factors such as ascending and descending, wind power and the like.

During travel, a change in a gear is affected by whether the speed of the rear wheels is increasing or decreasing. When the rotating speed of the rear wheel is increased, the change of the gear is that the sliding gear shifting transmission gear moves outwards and slides to a position which is right opposite to a slightly smaller wheel disc in the multi-stage speed change flywheel. When the rotating speed of the rear wheel is reduced, the change of the gear is that the sliding gear shifting transmission gear moves inwards and slides to a position which is just opposite to a slightly larger wheel disc in the multi-stage speed change flywheel. Thus, the automatic speed change of the bicycle is realized.

In addition, the parts of the blower casing, the blower blade and the like of the automatic speed changing device of the bicycle, which generate air pressure, can be replaced by a diaphragm type air pump or a piston type air pump on the market at present.

Drawings

Fig. 1, 2 and 3 are schematic diagrams of the structure of the present invention.

In fig. 1, 2, and 3: 1 rear wheel vehicle shaft sleeve, 2 rear wheel, 3 gear disc, 4 multi-stage speed change flywheel, 5 fixed plate, 6 gear shaft, 7 blower gear, 8 blower casing, 9 air duct, 10 slide bar, 11 folding bellows, 12 slide shift transmission gear, 13 limit baffle, 14 transmission chain, 15 blower transmission chain, 16 bearing, 17 metal bracket, 18 elastic metal sheet, 19 blower blade, 20 micro exhaust port, 21 air inlet, 22 bearing, 23 annular groove, 24 bicycle frame, 25 chain wheel, 26 spring bracket

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, a rear wheel vehicle shaft sleeve 1 is fixedly connected with a multi-stage speed change flywheel 4 and a gear disc 3 and then fixedly connected with a rear wheel 2, a sliding rod 10 is fixed with a fixing plate 5, a blower casing 8 is fixed with the fixing plate 5 through an air duct 9 and a folding air box 11, the fixing plate 5 is fixed on a bicycle frame 24, the folding air box 11 is hermetically penetrated on the sliding rod 10, one end of the folding air box 11 is fixed on the fixing plate 5, the other end of the folding air box is fixed on an inner ring of a bearing 16 connected with a sliding gear shift transmission gear 12, the sliding gear shift transmission gear 12 is penetrated on the sliding rod 10, the folding air box 11 is connected with the blower casing 8 through the air duct 9, a micro air outlet 20 is opened on the folding air box 11, the gear disc 3 on the rear wheel vehicle shaft sleeve 1 is connected with a blower gear 7 through a blower transmission chain 15, and a chain wheel disc 25 is connected with the sliding gear shift transmission gear 12 and the multi-stage speed change flywheel 4 through a transmission chain 14, the sliding gear shifting transmission gear 12 can slide on the sliding rod 10 through a connected bearing 16, a metal bracket 17 is arranged on the inner ring of the bearing 16 fixedly connected with the sliding gear shifting transmission gear 12, a flexible metal sheet 18 is fixed on the metal bracket 17, an annular groove 23 is arranged on the sliding rod 10, and a limit baffle 13 is arranged at one end of the sliding rod 10. The gear shaft 6 is fixed with the blower gear 7 and the blower blade 19 in the blower housing 8, and the other end of the gear shaft 6 is fixed on the fixing plate 5 through a bearing 22. The sliding shift drive gear 12 is slidable on the sliding bar 10 through the inner race of the bearing 16, and the position of the sliding shift drive gear 12 on the sliding bar 10 is constantly defined by the elastic metal piece 18 entering or exiting the annular groove 23 as the sliding shift drive gear 12 slides on the sliding bar 10. Inside the folding bellows 11 there is a spring 26, which spring 26 is in a tightened state when no pressure air enters.

When the bicycle pedal is pedaled by a person with strength, the chain wheel 25 rotates, the chain wheel 25 pulls the largest gear wheel of the multi-stage speed change flywheel 4 to rotate through the transmission chain 14, and meanwhile, the sliding gear shifting transmission gear 12 is pulled to rotate. The multistage speed change flywheel 4 rotates to drive the rear wheel vehicle shaft sleeve 1 to rotate, the rear wheel vehicle shaft sleeve 1 drives the gear disc 3 to rotate, the gear disc 3 drives the blower gear 7 to rotate through the blower transmission chain 15, the blower gear 7 drives the blower blade 19 in the blower shell 8 to rotate through the connected gear shaft 6, and wind enters the blower shell 8 from the air inlet 21 and then is sent into the folding bellows 11 from the air guide pipe 9. The gear disc 3 drives the blower gear 7 to rotate and accelerate through the blower transmission chain 15, the blower gear 7 drives the blower blade 19 in the blower housing 8 to rotate and accelerate through the connected gear shaft 6, more wind enters the blower housing 8 from the air inlet 21 and is sent into the folding bellows 11 from the air duct 9, the folding bellows 11 overcomes the tensile force of the spring 26 to stretch along with the increase of the wind pressure in the folding bellows 11, the folding bellows 11 pushes the inner ring of the bearing 16 connected with the sliding shift transmission gear 12 to move outwards to drive the sliding shift transmission gear 12 to move outwards, the metal bracket 17 on the inner ring of the bearing 16 fixes the elastic metal sheet 18 to slide outwards along the slide rod 10 and fall into the annular groove 23 to prevent the sliding shift transmission gear 12 from sliding, the sliding shift transmission gear 12 is aimed at a second slightly smaller disk of the multi-stage transmission flywheel 4, and the transmission chain 14 moves from the largest disk of the multi-stage transmission flywheel 4 to the slightly smaller disk along with the transmission of the transmission chain 14. At this time, the pedaling speed and force are kept, the blowing blade 19 in the blower housing 8 rotates stably, wind continuously enters the blower housing 8 from the air inlet 21 and then is sent into the folding air box 11 from the air guide pipe 9, the micro air outlet 20 of the folding air box 11 discharges redundant air, the pressure in the folding air box 11 keeps stable, the sliding gear shifting transmission gear 12 is stabilized at the position opposite to the second wheel disc slightly smaller in the multistage speed changing flywheel 4, the transmission chain 14 stably runs on the second wheel disc slightly smaller in the multistage speed changing flywheel 4, and the rotating speed of the rear wheel 2 is accelerated.

The pedaling force is continuously increased, the transmission chain 14 pulls the multistage speed change flywheel 4 to rotate and accelerate, the rear wheel vehicle shaft sleeve 1 drives the gear disc 3 to rotate and accelerate, the gear disc 3 drives the blower gear 7 to rotate and accelerate through the blower transmission chain 15, the blower gear 7 drives the blower blade 19 in the blower shell 8 to rotate and further accelerate through the connected gear shaft 6, more wind enters the blower shell 8 from the air inlet 21 and is sent into the folding bellows 11 from the air duct 9, the folding bellows 11 overcomes the pulling force of the spring 26 to extend again along with the continuous increase of the wind pressure in the folding bellows 11, the folding bellows 11 pushes the inner ring of the bearing 16 connected with the sliding gear shift transmission gear 12 to move outwards, the sliding gear shift transmission gear 12 is driven to move outwards, the metal bracket 17 on the inner ring of the bearing 16 fixes the elastic metal sheet 18 to slide outwards along the slide rod 10 and then fall into the next annular groove 23, the annular recess 23 in turn prevents the sliding shift gear 12 from sliding, when the sliding shift gear 12 is facing the slightly smaller third disk of the multi-stage flywheel 4. As the drive chain 14 rotates, the drive chain 14 moves from a second, slightly smaller disc to a third, slightly smaller disc in the multi-speed flywheel 4, further increasing the speed of the rear wheel 2. Along with the increase of the treading force, the speed of the rear wheel 2 is increased, the transmission chain 14 moves from the largest wheel disc to the smallest wheel disc in the multi-stage variable speed flywheel 4 step by step, at this time, the rotating speed of the rear wheel 2 reaches the fastest speed, and the elastic metal sheet 18 slides outwards to the position of the limit baffle 13 along the slide rod 10 and can not move outwards any more.

When the pedaling force is reduced or the speed of the rear wheel 2 of the bicycle is reduced due to the influence of external factors such as wind power and the like caused by fatigue of a rider, the rear wheel vehicle shaft sleeve 1 drives the gear disc 3 to rotate and reduce the speed, the gear disc 3 drives the blower gear 7 to rotate and reduce the speed through the blower transmission chain 15, the blower gear 7 drives the blower blade 19 in the blower shell 8 to rotate and reduce the speed through the connected gear shaft 6, the air inlet 21 enters the blower shell 8 and is sent into the folding air box 11 from the air duct 9, the air pressure in the folding air box 11 is gradually reduced, the folding air box 11 is influenced by the pulling force of the spring 26, the folding air box 11 pulls the inner ring of the bearing 16 connected with the sliding gear-shifting transmission gear 12 to move inwards, the sliding gear-shifting transmission gear 12 is driven to move inwards, and the elastic metal sheet 18 fixed on the metal bracket 17 on the inner ring of the bearing 16 is withdrawn from the annular groove 23 at the outermost side, and then slide inwards along the sliding rod 10 to fall into the adjacent inwards annular groove 23, the annular groove 23 prevents the sliding of the sliding shift transmission gear 12, and the sliding shift transmission gear 12 is opposite to a slightly larger wheel disc in the multistage speed change flywheel 4, and the transmission chain 14 moves from the smallest wheel disc in the multistage speed change flywheel 4 to the slightly larger wheel disc along with the rotation of the transmission chain 14, so that the rotation speed of the rear wheel 2 is reduced. With the reduction of the pedaling force, the speed of the rear wheel 2 is reduced, the transmission chain 14 gradually moves from the smaller wheel disc to the larger wheel disc in the multistage variable-speed flywheel 4, at this time, the rotating speed of the rear wheel 2 gradually slows down, and the elastic metal sheet 18 slides inwards to the leftmost position along the slide rod 10 and can not move inwards any more.

The change of the pedaling force corresponds to the change of the rotating speed of the rear wheel 2 and is influenced by factors such as ascending and descending, wind power and the like.

During travel, a change in a gear is affected by whether the rear wheels 2 are turning faster or slower. When the rotation speed of the rear wheel 2 is increased, the gear is changed in such a manner that the sliding shift transmission gear 12 is moved outward and the sliding shift transmission gear 12 slides to a position facing a slightly smaller disk in the multistage transmission flywheel 4. When the rotation speed of the rear wheel 2 is reduced, the gear is changed in such a way that the sliding shift transmission gear 12 moves inward, and the sliding shift transmission gear 12 slides to a position facing a slightly larger wheel disc in the multistage speed change flywheel 4. Thus, the automatic gear shifting of the bicycle is realized.

In addition, in the above-mentioned automatic transmission for a bicycle, the parts of the blower housing 8, the blower blade 19, etc. generating air pressure may be replaced by a diaphragm type air pump or a piston type air pump currently on the market.