CN213442938U

CN213442938U - Speed regulating mechanism of chainless bicycle

Info

Publication number: CN213442938U
Application number: CN202022643998.0U
Authority: CN
Inventors: 林坚江
Original assignee: Foshan Zhongman Intelligent Technology Co ltd
Current assignee: Foshan Zhongman Intelligent Technology Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-15
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a chainless bicycle's speed governing mechanism, install the drive shaft in the flower-drum including flower-drum and rotation, drive shaft one end fixed mounting has the drive outer dish, the one end coaxial arrangement that the flower-drum is close to the drive outer dish has the flywheel, the one end fixed mounting that the drive outer dish is close to the flywheel has main drive wheel and change gear fixed axle, the last rotation of change gear fixed axle installs the fixed axle sleeve of change gear, coaxial arrangement is sheathe in to the change gear fixed axle has the accessory drive wheel with main drive wheel meshing, flywheel and change gear fixed axle sheathe in respectively coaxial arrangement have two at least change gear, the change gear fixed axle sheathes in and installs gear control assembly. Through the mode, the utility model is gear-driven, can adjust the speed when in use, and has the advantages of high transmission efficiency, stable quality, difficult deformation and long service life; when the bicycle breaks down, the detection, maintenance and replacement are convenient to carry out.

Description

Speed regulating mechanism of chainless bicycle

Technical Field

The utility model relates to a bicycle technical field, more specifically the speed adjusting mechanism who relates to a chainless bicycle that says so.

Background

Bicycles, also known as bicycles or bicycles, are generally two-wheeled small land vehicles. After a person rides the vehicle, the person steps on the pedal as power, and the vehicle is a green and environment-friendly vehicle. Can be used as an environment-friendly vehicle for riding instead of walking and going out; more and more people use bicycles as fitness equipment for riding exercise and bicycle travel; the bicycle itself is also a sport game. With the popularization of the low-carbon environment-friendly life concept, the bicycle is not only a vehicle but also a healthy and fashionable life style.

The existing bicycle transmission device is mostly chain transmission, and has the problems that a bicycle chain is easy to age, loosen and rust, noise is easy to generate in the riding process, and when the bicycle runs on a bumpy road, the chain is easy to fall off, so that the normal use of a rider is influenced. The speed change mechanism of the shaft-driven bicycle with the speed regulation function is arranged in a hub, the structure is complex, when the shaft is deformed or other parts are failed, the whole hub needs to be detached and replaced, the maintenance is troublesome, and the chain-free bicycle with the gear transmission has no speed regulation function in the market.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical defect, the utility model provides a speed adjusting mechanism of chainless bicycle to solve the technical problem who mentions among the above-mentioned background art.

In order to solve the above problem, the utility model discloses realize according to following technical scheme:

a speed adjusting mechanism of chainless bicycle, install the drive shaft in the flower-drum including flower-drum and rotation, drive shaft one end fixed mounting has the drive outer dish, the one end coaxial arrangement that the flower-drum is close to the drive outer dish has the flywheel, the one end fixed mounting that the drive outer dish is close to the flywheel has main drive wheel and change gear fixed axle, the fixed axle sleeve of change gear is installed in the rotation on the change gear fixed axle, the change gear fixed axle sheathes in coaxial arrangement and main drive wheel meshed auxiliary drive wheel, flywheel and change gear fixed axle sheathes in respectively coaxial arrangement have two at least change gear, the change gear fixed axle sheathes in and install gear control assembly.

As a further improvement of this scheme, the gear control assembly includes adapter sleeve, gear control rod, copper slider, connecting piece, cable and spring, adapter sleeve coaxial arrangement is sheathe in at the change gear fixed axle, copper slider one end fixed mounting is on the gear control rod, and the other end joint is installed in the adapter sleeve outside, the gear control rod rotates and installs on the connecting piece, cable slidable mounting in the connecting piece and with gear control rod swing joint, the outside cover of cable is established and is installed the spring.

As a further improvement of the scheme, a slow driving gear and a fast driving gear are coaxially mounted on the speed change gear fixing shaft sleeve, a slow driven gear and a fast driven gear are coaxially mounted on the flywheel, the slow driving gear is meshed with the slow driven gear, and the fast driving gear is meshed with the fast driven gear.

As a further improvement of the scheme, the two sides of the connecting sleeve are convexly provided with lugs which are uniformly distributed in the circumferential direction, and the slow driving gear and the fast driving gear are respectively penetrated with accommodating holes which are uniformly distributed in the circumferential direction and matched with the lugs.

As a further improvement of the scheme, a clamping groove is formed in the outer side of the connecting sleeve, and the copper sliding piece is clamped and installed in the clamping groove.

As a further improvement of the scheme, key grooves are formed in the connecting sleeve and the speed change gear fixing shaft sleeve, and the connecting sleeve is connected with the speed change gear fixing shaft sleeve through keys.

As a further improvement of the scheme, a hexagonal through hole penetrates through the auxiliary driving wheel, and the outer contour of one end, close to the driving outer disc, of the speed change gear fixing shaft sleeve is matched with the hexagonal through hole.

As a further improvement of the scheme, a transmission case which is matched with the driving outer disk and used for accommodating all parts is coaxially arranged on the hub.

As a further improvement of the scheme, bearings are arranged at the rotary connection position of the hub and the driving shaft and the rotary connection position of the speed change gear fixing shaft sleeve and the speed change gear fixing shaft.

As a further improvement of the scheme, shaft fixing plates are fixedly mounted at two ends of the driving shaft, and the driving outer disc is fixedly connected with the driving shaft through the shaft fixing plates.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses set up drive outer disc and flywheel outside the spoke connection on the flower-drum, and fixedly connect main drive wheel and change gear fixed axle on the drive outer disc, install change gear on the flywheel, install vice drive wheel and change gear on the change gear fixed axle, and set up the gear and control the subassembly, can carry out the speed governing, because for gear drive and can carry out the speed governing, therefore transmission efficiency is high, the quality is stable, can not produce easily and warp, long service life; the transmission parts for speed change are arranged at the end part of the hub and are made into a part assembly, when the bicycle has a fault, the driving outer disc is directly opened for inspection and maintenance, and when the bicycle has a fault which is difficult to be checked, the speed regulating mechanism can be directly replaced, so that the bicycle is convenient and fast.

Drawings

The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a cross-sectional structural view of the present invention;

fig. 3 is an exploded view of the present invention;

FIG. 4 is an exploded view of the middle shift operating assembly and its connecting structure;

in the figure: 1. a flower drum; 2. a drive shaft; 3. driving the outer disc; 4. a flywheel; 5. a change gear fixing shaft; 6. a speed change gear fixing shaft sleeve; 7. a secondary drive wheel; 8. a main drive wheel; 9. a shift operating assembly; 91. connecting sleeves; 92. a gear operating lever; 93. a copper sliding member; 94. a connecting member; 95. a cable; 96. a spring; 10. a slow speed drive gear; 11. a fast driving gear; 12. a slow driven gear; 13. a fast driven gear; 14. a bump; 15. an accommodating hole; 16. a hexagonal through hole; 17. a transmission housing; 18. a shaft fixing plate; 19. a clamping groove.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-4, a speed adjusting mechanism of chainless bicycle, install drive shaft 2 in flower-drum 1 including flower-drum 1 and rotation, flower-drum 1 is used for being connected with each spoke of wheel on the bicycle, flower-drum 1 is hollow structure, the shoulder hole that is used for the bearing installation is offered at the inside hollow both ends of flower-drum 1, the drive shaft 2 of installation is used for transmitting torque in it. The hub 1 is coaxially provided with a transmission case 17 which is matched with the driving outer disk 3 and used for accommodating each part, and the transmission case 17 can prevent each transmission part from being exposed in the outside air, bring danger to users, prevent dust and water from splashing into the transmission case to influence the working performance of each transmission part, and play a role in protection.

The two ends of the driving shaft 2 are respectively provided with a rectangular thin plate-shaped shaft fixing plate 18, the shaft fixing plate 18 at the right end of the driving shaft 2 is fixedly connected with the driving shaft 2 in a welding mode, then the right end of the shaft fixing plate 18 is provided with the driving outer disc 3, the shaft fixing plate 18 is provided with a threaded hole, the driving outer disc 3 is provided with a through hole, and the shaft fixing plate 18 is fixedly connected with the driving outer disc 3 through screws; the shaft fixing plate 18 at the left end of the driving shaft 2 is movably connected with the driving shaft 2, a driving outer plate capable of penetrating through the driving shaft 2 is arranged outside the shaft fixing plate 18 at the left end of the driving shaft 2, the part of the driving shaft 2 penetrating through the driving outer plate is an external thread section, and the driving outer plate and the position of the shaft fixing plate 18 are locked and fixed through screwing nuts. The driving outer plate and the driving outer disc 3 are connected with external pedals, and can convert torque force generated from the outside into rotation of the driving outer plate and the driving outer disc.

The flywheel 4 is coaxially installed at one end of the hub 1 close to the driving outer disc 3, the flywheel 4 can drive the hub 1 to rotate synchronously when rotating towards the advancing direction of the bicycle, when the flywheel 4 rotates towards the opposite direction of the advancing direction of the bicycle, the hub 1 cannot be driven to rotate due to the ratchet and pawl mechanism arranged in the flywheel 4, and the hub 1 continues to rotate inertially towards the advancing direction of the bicycle until the energy storage consumption is finished or the external brake can be stopped.

The driving outer disc 3 is fixedly provided with a main driving wheel 8 and a speed change gear fixing shaft 5 at one end close to the flywheel 4, and in the embodiment, the speed change gear fixing shaft 5 is embedded in the gearbox shell 17 and fixed by adopting a die casting mode; the main driving wheel 8 is provided with a plurality of counter bores penetrating in the circumferential direction, threaded holes are formed in positions, corresponding to the counter bores, of the driving outer disc 3, the main driving wheel 8 is connected with the driving outer disc 3 through screws, the middle of the main driving wheel 8 is hollowed, and the rotation of the hub 1 is not affected by the synchronous rotation of the main driving wheel and the driving outer disc 3.

A speed change gear fixing shaft sleeve 6 is rotatably mounted on the speed change gear fixing shaft 5, stepped holes used for bearing mounting are also formed in two ends of the inside of the speed change gear fixing shaft sleeve 6, a reinforcing plate is mounted on the right side of a speed change box shell 17, the other end, connected with the speed change box shell 17, of the speed change gear fixing shaft 5 is fixed on the reinforcing plate, the reinforcing plate is connected with the speed change box shell 17 through screws, and the axial position, on the speed change gear fixing shaft 5, of the fixing shaft sleeve is located through the speed change box shell 17 and the reinforcing plate.

Bearings are arranged at the rotary connection position of the hub 1 and the driving shaft 2 and the rotary connection position of the speed change gear fixing shaft sleeve 6 and the speed change gear fixing shaft 5. The bearing of installation in the flower-drum 1 is ball bearing, mainly bears the radial force of during operation, and the bearing of installation is roller bearing in the fixed axle sleeve 6 of change gear, because of change gear fixed axle sleeve 6's rotational speed is greater than drive shaft 2 far away, therefore the ball bearing who sets up can bear bigger radial force, increase of service life.

The speed change gear fixing shaft sleeve 6 is coaxially provided with an auxiliary driving wheel 7 meshed with the main driving wheel 8, a hexagonal through hole 16 penetrates through the center of the auxiliary driving wheel 7, the outer contour of one end, close to the driving outer disc 3, of the speed change gear fixing shaft sleeve 6 is matched with the hexagonal through hole 16, therefore, the auxiliary driving wheel 7 can be directly sleeved in the speed change gear fixing shaft sleeve 6, the connection between the auxiliary driving wheel 7 and the speed change gear fixing shaft sleeve 6 is similar to spline connection, the auxiliary driving wheel can be directly installed to drive a connected part to synchronously rotate, in the embodiment, the main driving wheel 8 rotates to drive the auxiliary driving wheel 7 to rotate, and the auxiliary driving wheel 7 rotates to drive the.

A slow driving gear 10 and a fast driving gear 11 for speed change are coaxially installed on the speed change gear fixing shaft sleeve 6, the slow driving gear 10 and the fast driving gear 11 are both sleeved with the speed change gear fixing shaft sleeve 6, therefore, when the connecting sleeve 91 is not connected, the slow driving gear 10 and the fast driving gear 11 can both self-rotate on the speed change gear fixing shaft sleeve 6, a slow driven gear 12 and a fast driven gear 13 for speed change are coaxially installed on the flywheel 4, the slow driven gear 12 and the fast driven gear 13 are fixedly connected with the flywheel 4, the flywheel 4 rotates, the slow driven gear 12 and the fast driven gear 13 both synchronously rotate, each gear is fixed by a snap spring at the axial direction position, the slow driving gear 10 is engaged with the slow driven gear 12 to form a slow gear set, the fast driving gear 11 is engaged with the fast driven gear 13 to form a fast gear set, the gear ratio of the slow gear set is greater than that of the fast gear set.

The gear control assembly 9 is installed on the speed change gear fixing shaft sleeve 6, the gear control assembly 9 comprises a connecting sleeve 91, a gear control rod 92, a copper sliding part 93, a connecting part 94, a stay cable 95 and a spring 96, the connecting sleeve 91 is coaxially installed on the speed change gear fixing shaft sleeve 6, key grooves with the same width are formed in an inner hole of the connecting sleeve 91 and the outer side of the speed change gear fixing shaft sleeve 6, the length of the key groove in the connecting sleeve 91 penetrates through the whole connecting sleeve 91, the length of the key groove formed in the outer side of the speed change gear fixing shaft sleeve 6 is equivalent to that of the key groove in the connecting sleeve 91, the connecting sleeve 91 is connected with the speed change gear fixing shaft sleeve 6 through a key, the key. Annular joint groove 19 has been seted up in the adapter sleeve 91 outside, and copper slider 93 joint is installed in joint groove 19, and when adapter sleeve 91 rotated, copper slider 93 can carry out the slip of circumference along joint groove 19 in joint groove 19. The shift lever 92 is Y-shaped, and the copper sliding members 93 are symmetrically mounted at the two diverging ends thereof, so that the copper sliding members 93 do not generate a large frictional resistance when sliding on the connecting sleeve 91 because of a small friction coefficient of the copper material, thereby enabling smooth sliding.

The connecting piece 94 is L-shaped and is fixedly arranged on the outer peripheral surface of the transmission case 17, a notch for the gear control lever 92 to pass through is penetrated through the connecting piece 94 and the transmission case 17, one end of the gear control lever 92, which is not provided with the copper sliding piece 93, passes through the connecting piece 94 and the notch on the transmission case 17, a through hole is penetrated through the notch of the connecting piece 94 by the gear control lever 92, a through hole is also penetrated through the connecting piece 94 corresponding to the through hole of the gear control lever 92, the gear control lever 92 can be rotatably arranged on the connecting piece 94 by passing through the rotating shaft, the pull cable 95 is T-shaped, the pull cable 95 is slidably arranged on the connecting piece 94 and movably connected with the gear control lever 92, the pull cable 95 slides left and right to drive the gear control lever 92 to rotate, the spring 96 is sleeved outside the pull cable 95, the spring 96 is a compression spring 96, two ends of the spring 96 are respectively abutted against the, when the pulling force is removed, the shift operating lever 92 is automatically returned by the force of the spring 96.

The two sides of the connecting sleeve 91 are provided with protruding blocks 14 which are evenly distributed along the circumferential direction, and the slow driving gear 10 and the fast driving gear 11 are provided with accommodating holes 15 which are evenly distributed along the circumferential direction and matched with the protruding blocks 14. When the speed is changed, the bump 14 on the left side of the connecting sleeve 91 is clamped into the accommodating hole 15 on the fast driving gear 11, the bump 14 on the right side of the connecting sleeve 91 is separated from the accommodating hole 15 of the slow driving gear 10, and the slow driving gear 10 rotates automatically, so that the rotating force can be specially transmitted to the fast driving gear 11, namely, the fast state; under the normal state, the spring 96 acts on the cable 95, so that the protrusion 14 on the right side of the connecting sleeve 91 is kept connected with the receiving hole 15 on the slow driving gear 10, and the fast driving gear 11 rotates by itself, thus the slow state is obtained.

A speed adjusting mechanism operating principle of chainless bicycle be: under the action of the spring 96, the connecting sleeve 91 is connected with the slow driving gear 10, when the driving outer disc 3 rotates under the action of external pedal force, the main driving wheel 8 is driven to rotate, the main driving wheel 8 drives the auxiliary driving wheel 7 engaged with the main driving wheel to rotate, the auxiliary driving wheel 7 drives the speed change gear fixing shaft sleeve 6 to rotate, the speed change gear fixing shaft sleeve 6 is in key connection with the connecting sleeve 91, the speed change gear fixing shaft sleeve 6 and the connecting sleeve 91 rotate synchronously, when the cable 95 is not pulled, the connecting sleeve 91 is connected with the slow driving gear 10 to transmit the rotation to the slow driving gear 10, the slow driving gear 10 rotates to drive the slow driven gear 12 to rotate, the slow driven gear 12 is fixedly arranged on the flywheel 4, the flywheel 4 rotates to drive the hub 1 to rotate slowly, when speed change is needed, the cable 95 is pulled, the cable 95 drives the gear lever 92 to rotate, the gear control lever 92 makes the connecting sleeve 91 axially slide on the speed change gear fixing shaft sleeve 6, the connecting sleeve 91 is disconnected from the slow driving gear 10 and connected with the fast driving gear 11, the connecting sleeve 91 and the fast driving gear 11 are driven to synchronously rotate when the connecting sleeve 91 rotates, the fast driving gear 11 drives the fast driven gear 13 and the flywheel 4 to rotate, and the hub 1 rapidly rotates.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a speed adjusting mechanism of chainless bicycle which characterized in that: install the drive shaft in the flower-drum including flower-drum and rotation, drive shaft one end fixed mounting has the drive outer dish, the one end coaxial arrangement that the flower-drum is close to the drive outer dish has the flywheel, the one end fixed mounting that the drive outer dish is close to the flywheel has main drive wheel and change gear fixed axle, rotate on the change gear fixed axle and install the fixed axle sleeve of change gear, the change gear fixed axle sheathes in coaxial arrangement and has the auxiliary drive wheel with main drive wheel meshing, flywheel and change gear fixed axle sheathes in respectively coaxial arrangement have two at least change gear, the change gear fixed axle sheathes in and installs gear control assembly.

2. The derailleur of claim 1, wherein: the gear control assembly comprises a connecting sleeve, a gear control rod, a copper sliding part, a connecting piece, a stay cable and a spring, the connecting sleeve is coaxially installed on the speed changing gear fixing shaft sleeve, one end of the copper sliding part is fixedly installed on the gear control rod, the other end of the copper sliding part is connected with the connecting sleeve in a clamped mode, the gear control rod is rotatably installed on the connecting piece, the stay cable is slidably installed on the connecting piece and is movably connected with the gear control rod, and the spring is installed on the outer sleeve of the.

3. The derailleur of claim 2, wherein: the flywheel is characterized in that a slow driving gear and a fast driving gear are coaxially mounted on the speed change gear fixing shaft sleeve, a slow driven gear and a fast driven gear are coaxially mounted on the flywheel, the slow driving gear is meshed with the slow driven gear, and the fast driving gear is meshed with the fast driven gear.

4. A chainless bicycle derailleur according to claim 3, wherein: the connecting sleeve is characterized in that lugs which are uniformly distributed in the circumferential direction are convexly arranged on two sides of the connecting sleeve, and accommodating holes which are uniformly distributed in the circumferential direction and matched with the lugs penetrate through the slow driving gear and the fast driving gear.

5. The derailleur of claim 2, wherein: the joint groove has been seted up in the adapter sleeve outside, copper slider joint is installed in the joint inslot.

6. The derailleur of claim 2, wherein: the connecting sleeve and the speed change gear fixing shaft sleeve are both provided with key grooves and connected through keys.

7. The derailleur of claim 1, wherein: a hexagonal through hole penetrates through the auxiliary driving wheel, and the outer contour of one end, close to the driving outer disc, of the speed change gear fixing shaft sleeve is matched with the hexagonal through hole.

8. The derailleur of claim 1, wherein: and a transmission case which is matched with the driving outer disk and used for accommodating all parts is coaxially arranged on the hub.

9. The derailleur of claim 1, wherein: and bearings are arranged at the rotary joint of the hub and the driving shaft and the rotary joint of the speed change gear fixing shaft sleeve and the speed change gear fixing shaft.

10. The derailleur of claim 1, wherein: the both ends of drive shaft are equal fixed mounting have a shaft fixed plate, the drive outer dish passes through shaft fixed plate and drive shaft fixed connection.