CN210344198U

CN210344198U - Flexible rack transmission

Info

Publication number: CN210344198U
Application number: CN201920758900.0U
Authority: CN
Inventors: 周晓光; 贺望钧
Original assignee: Baoji Sulang Metal Products Co Ltd
Current assignee: Baoji sulang metal products Co., Ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-04-17
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses a flexible rack derailleur, which comprises a main shaft, the cover is equipped with receipts chain mechanism, clutch and throw-out collar from a left side right side in proper order on the main shaft, clutch outside cover is equipped with the speed governing dish, it includes planet wheel, swing arm and flexible gear to receive chain mechanism, planet wheel and speed governing dish fixed connection, the swing arm is followed the circumference equipartition on planet wheel, flexible gear one end is fixed in on the planet wheel, its other end swing joint in swing arm outer end. Through the planetary gear chain retracting mechanism and the stretching of the swing arm, the diameter of a chain plate formed by the flexible rack around the outer edge of the swing arm group is continuously changed, the rear flywheel is matched to realize the stepless speed change of bicycle transmission, the clutch is arranged to realize the conversion between the speed change state and the riding state of the bicycle, and the flexible rack is arranged to ensure that the speed changer has simple structure, high transmission efficiency and attractive appearance.

Description

Flexible rack transmission

Technical Field

The utility model belongs to the technical field of the derailleur, concretely relates to flexible rack derailleur.

Background

The bicycle speed changing system has the function of changing the speed of a bicycle by changing the matching of a chain and gear discs with different front and rear sizes. The purpose of the speed-changing bicycle is to reduce the weight of the bicycle body to the maximum extent, so that the bicycle is light and convenient to ride at high speed.

The bicycle speed change transmission in the existing market is common, but the chain has serious deviation, complex structure, low transmission efficiency, serious abrasion, messy appearance and poor aesthetic feeling.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough of prior art, provide a by the flexible rack, the stepless flexible rack derailleur that chain ware vortex line reducing principle is constituteed is received to the planet.

The utility model adopts the technical proposal that: the utility model provides a flexible rack derailleur, includes the main shaft, it is equipped with receipts chain mechanism, clutch and throw-out collar to overlap in proper order from a left side to the right side on the main shaft, clutch outside cover is equipped with the speed governing dish, it includes planet wheel, swing arm and flexible gear to receive chain mechanism, planet wheel and speed governing dish fixed connection, the swing arm is followed the circumference equipartition on planet wheel, flexible gear one end is fixed in on the planet wheel, its other end swing joint in swing arm outer end.

Preferably, the speed regulation disc is of a disc structure, and a plurality of vortex grooves are formed in the speed regulation disc.

Preferably, the planet gear comprises a sun gear, a planet gear and an outer gear ring which are sequentially arranged from the center to the outside, the planet gear is arranged between the sun gear and the outer gear ring in an equidistant mode, the planet gear comprises a plurality of small gears, and planet carriers are symmetrically arranged on two sides of each small gear.

Preferably, one end of the planet carrier is fixedly connected with the main shaft, and the sun gear penetrates through the main shaft and is in sliding fit with the main shaft.

Preferably, the swing arm is of a boomerang type structure, one end of the swing arm is movably connected to the planet carrier, the other end of the swing arm is provided with a pin, and one end of the pin penetrates through the vortex groove.

Preferably, the flexible gear is wound on the swing arm, one end of the flexible gear is movably connected to the outer gear ring, and the other end of the flexible gear penetrates through the pin.

Compared with the prior art, the utility model discloses beneficial effect who has: through the planetary gear chain retracting mechanism and the stretching of the swing arm, the diameter of a chain plate formed by the flexible rack around the outer edge of the swing arm group is continuously changed, the rear flywheel is matched to realize the stepless speed change of bicycle transmission, the clutch is arranged to realize the conversion between the speed change state and the riding state of the bicycle, and the flexible rack is arranged to ensure that the speed changer has simple structure, high transmission efficiency and attractive appearance.

Drawings

FIG. 1 is a schematic structure of the present invention;

FIG. 2 is a schematic structure of the present invention;

fig. 3 is a schematic view of the structure of the flexible rack of the present invention;

FIG. 4 is a schematic view of the structure of the small plate of the present invention;

fig. 5 is a schematic view of the structure of the large plate of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model provides a flexible rack transmission, refers to fig. 1 and fig. 2, includes main shaft 5, the cover is equipped with receipts chain mechanism 1, clutch 6 and throw-out collar 8 from a left side to the right side in proper order on main shaft 5, clutch 6 outside cover is equipped with speed governing dish 4, receipts chain mechanism 1 includes planet wheel 3, swing arm 2 and flexible gear 9, planet wheel 3 and speed governing dish 4 fixed connection, swing arm 2 is along the circumference equipartition on planet wheel 3, flexible gear 9 one end is fixed in on planet wheel 3, its other end swing joint in swing arm 2 outer end.

Referring to fig. 1, the governor disc 4 is a disc structure, and a plurality of spiral grooves 41 are formed on the governor disc.

Referring to fig. 2 and 3, the planet gear 3 includes a sun gear, a planet gear and an outer gear ring which are sequentially arranged from the center to the outside, the planet gear is arranged between the sun gear and the outer gear ring in an equidistant manner, the planet gear includes a plurality of small gears, and planet carriers are symmetrically arranged on two sides of the small gears.

Referring to fig. 2, one end of the planet carrier is fixedly connected to the main shaft 5, and the sun gear penetrates through the main shaft 5 and is in sliding fit with the main shaft 5.

Referring to fig. 1, one end of the swing arm 2 is movably connected to the planet carrier 34, and the other end of the swing arm is provided with a pin 21, and one end of the pin 21 is inserted into the spiral groove 41.

Referring to fig. 4, the flexible gear 9 is wound on the swing arm 2, one end of the flexible gear 9 is movably hinged on the outer gear ring 31, and the other end thereof is arranged on the pin 21 in a penetrating manner.

The speed change principle is as follows: when the clutch 6 is pushed by the push ring 8, the speed regulation disk 7 is separated from the main shaft 5, the speed regulation disk 7 is meshed with the push ring 8 and is relatively fixed, when the main shaft 5 rotates forwards or backwards, the main shaft 5 drives the planet carrier 34 and the planet teeth 32 to rotate, the planet teeth 32 rotate to drive the outer gear ring 31, the outer gear ring 31 rotates to drive the flexible gear 9 and the swing arm 2 to slide along the vortex groove 41 and drive the flexible gear 9 to expand or contract inwards and outwards, meanwhile, due to the principle of a planetary mechanism, the outer gear ring 31 rotates with the same-direction multiple speed as the planet carrier 34, the flexible gear 9 contracts along with the radial movement of the swing arm 2, due to the synchronous movement of the five swing arms 2, the flexible gear 9 can form a gear ring with variable diameter along the outer side of the swing arm 2, and the purpose of final speed change can be achieved by.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a flexible rack derailleur, a serial communication port, includes main shaft (5), the cover is equipped with from a left side right side in proper order on main shaft (5) and receives chain mechanism (1), clutch (6) and throw-out collar (8), clutch (6) outside cover is equipped with speed governing dish (4), receive chain mechanism (1) including planet wheel (3), swing arm (2) and flexible gear (9), planet wheel (3) and speed governing dish (4) fixed connection, the circumference equipartition is followed in planet wheel (3) in swing arm (2), flexible gear (9) one end is fixed in on planet wheel (3), its other end swing joint in swing arm (2) outer end.

2. A flexible rack gear transmission as claimed in claim 1, characterised in that the governor disc (4) is of a disc construction with a plurality of spiral grooves (41) formed therein.

3. A flexible rack transmission according to claim 2, characterized in that the planet wheels (3) comprise a sun gear, a planet gear and an outer ring gear, which are arranged in sequence from the center outwards, the planet wheels are arranged at equal intervals between the sun gear and the outer ring gear, the planet wheels comprise a plurality of small gears, and the planet carriers are symmetrically arranged on two sides of the small gears.

4. A flexible rack gear transmission according to claim 3, wherein one end of the planet carrier (34) is fixedly connected with the main shaft (5), and the sun gear is arranged on the main shaft (5) in a penetrating way and is in sliding fit with the main shaft (5).

5. Flexible rack transmission according to claim 4, characterized in that one end of the swing arm (2) is movably connected to the planet carrier, and the other end is provided with a pin (21), and one end of the pin (21) is arranged in the vortex groove (41).

6. The flexible rack transmission according to claim 5, characterized in that the flexible gear (9) is wound on the swing arm (2), one end of the flexible gear (9) is movably connected to the external gear ring, and the other end of the flexible gear is arranged on the pin (21).