CN2222122Y

CN2222122Y - Bicycle speed increasing device

Info

Publication number: CN2222122Y
Application number: CN 95214861
Authority: CN
Inventors: 申保和
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-16
Filing date: 1995-06-16
Publication date: 1996-03-13
Anticipated expiration: 2005-06-16

Abstract

The utility model relates to a bicycle speed increasing device which is composed of a casing, a speed changer and a keyboard. The speed changer is arranged in the casing. The structure of the utility model is characterized in that a fixed fluted disc is fixed on the casing and arranged on a bearing of a planet rack shaft; the planet rack shaft is provided with a planet wheel, engaged with the fixed fluted disc, and blocked off by a press plate; a shaft of the hollow speed increasing gear is arranged on the bearing of the planet rack shaft; the gear of the shaft of the speed increasing gear engages with the planet wheel; the shaft of the speed increasing gear is provided with a speed changing keyboard on the outer end part of the casing. The utility model has the advantages of convenient installation and use, labour saving and high speed.

Description

The bicycle speed increaser

The utility model relates to a kind of bicycle speed increaser, can be used for using on the various variable speed bicycles.

Present bicycle speed speed is no matter its speed change is restricted in varying degrees, because the large and small variation of taking turns is restricted, so-called fast just bull wheel diminish wheel circle more often, promptly chain drum turns around, trailing wheel changes 3.42 circles, and this is the fastest one grade; So-called slow, be exactly that the diminish number of turns of wheel of bull wheel does not have so muchly, the slowest that grade is that chain drum turns around, and trailing wheel also and then turns around, and this is fast one slow, for ordinary bicycle, has reached the limit on speed, improve the bicycle speed of a motor vehicle more so?

The purpose of this utility model just provides a kind of bicycle speed increaser.

The purpose of this utility model is achieved like this, according to the engine installation of present bicycle be that pin turns, chain drum and axle utilize wheel shaft labour-saving mechanics principle, its wheel shaft formula is Pr=FR, P is a resistance, r is that resistance arm, F are that power, R are power arm, and is V according to the speed of bicycle ²=Vo ²+ 2as, Vo is a speed (being initial velocity) before the speed change, a is an acceleration/accel, s is the distance of being passed through, can calculate the size of wheel disc required under friction speed by two formula, and (the concrete general professional of method of calculating all can carry out to calculate ratio of number of teeth, no longer repeat), under above-mentioned theory instructs, actual needs according to speed change, design fluted disc and planetary wheel with matching, and through bearing, wheel shaft, bolts etc. rationally assemble a kind of later-model bicycle speed increaser, promptly by housing parts, the variable part, the chain disc portion constitutes, housing is a left side, right two parts, the variable part is by fixed gear plate, the pinion carrier axle, satellite gear, formations such as bearing, fluted disc are fixed in the left shell, on the pinion carrier axle satellite gear are housed, and be meshed with fluted disc, in the bearing in the right shell body hollow multiplying wheel axle is housed, is contained on the pinion carrier axle left side again through bearing, right shell body is fixed together.

Its scientific structure design of the utility model is reasonable, and is easy to install, laborsaving, speed is fast, is a reform to existing bicycle speed-varying unit.

Following structure accompanying drawing elaborates to structure of the present utility model.

Accompanying drawing is that structure of the present utility model is laterally cut constructional drawing open.

Shown in figure, its structure of the utility model is, bearing 5 is housed in the right shell body 4, fixed gear plate 1 is contained on the bearing 5, and be fixed on the left shell with screw rod 3, pinion carrier axle 2 is contained in the bearing 5, and satellite gear 11 is housed on the pinion carrier axle, and is meshed with internal tooth on the fixed gear plate 1, through bolt 10 pressing plate 9 is housed outside the satellite gear 11, satellite gear is run outward, and satellite gear 11 generally can be 2-6, and balancedly is contained on the corresponding pillar of pinion carrier axle 2 gardens on week, fixed gear plate number and satellite gear, the number of teeth on the multiplying wheel axle 14 can be decided according to the speed change needs, fixed gear plate 1 can be 47 fluted discs in the present embodiment, and satellite gear can be 12 teeth, is 27 teeth etc. on the multiplying wheel axle; Bearing 12 is housed in the right shell body 24, hollow multiplying wheel axle 14 is housed in the bearing 12, buried bearing 7,17, interstage sleeve 15 is arranged between bearing, interstage sleeve 15 is sleeved on the pinion carrier axle 2, gear on the multiplying wheel axle is meshed with satellite gear, has between pressing plate 9, bearing 12 and housing, oil drain hole 18, and its mouthful gone up and through rubber cushion 21 plug screw 19 be housed; Left and right sides two housing sections with spiral shell rob 20 and nut 22 be fixed together, for preventing leakage of oil, seal ring 25 is housed in the seal groove on housing 24, increase and pass gear wheel shaft 14 and on right shell body 24 outer end portion, speed-changing chain guard 13 is housed, for preventing to become flexible, speed-changing chain guard has captive nut 23 outward, and there is hold-doun nut 8 at pinion carrier axle two ends, for preventing that lubricating oil from leaking outside, there is oil seal ring 6,16 in bearing 7,17 outsides on the pinion carrier axle.In use, only need the utility model is contained on the former chain drum axle and fix get final product, simple, convenient, be easy to reequip very much to having bicycle now, popularizing application prospect is very bright.

Claims

1, a kind of by bearing, the bicycle speed increaser that chain drum constitutes, it is characterized in that being equipped with in the left shell (4) bearing (5), fixed gear plate (1) is contained on the bearing (5), and be fixed on the left shell, satellite gear (11) is housed on the pinion carrier axle, and be meshed with internal tooth on the fixed gear plate (1), the outer pressing plate (9) that is equipped with of satellite gear (11), bearing (12) is housed in the left shell (24), hollow multiplying wheel axle (14) is housed in the bearing, buried bearing (7), (17), interstage sleeve (15) is arranged between bearing, and interstage sleeve (15) is sleeved on the pinion carrier axle (2), and the gear on the multiplying wheel axle is meshed with satellite gear, left and right sides two housing sections is fixed together, and multiplying wheel axle (14) is equipped with speed-changing chain guard (13) on right shell body (24) outer end portion.

2, bicycle speed increaser according to claim 1 is characterized in that the satellite gear (11) on the said pinion carrier axle (2) can be 2-6, and balancedly is contained on the corresponding pillar of pinion carrier axle (2) garden on week.

3, bicycle speed increaser according to claim 1 is characterized in that said fixed gear plate is 47 fluted discs, and satellite gear is 12 teeth, is 27 teeth on the multiplying wheel axle.