CN2444874Y

CN2444874Y - Speed transmission for bicycle

Info

Publication number: CN2444874Y
Application number: CN 00252671
Authority: CN
Inventors: 王立伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-30
Filing date: 2000-10-30
Publication date: 2001-08-29
Anticipated expiration: 2010-10-30

Abstract

The utility model relates to a speed variator for a bicycle, comprising a centre shaft provided with three ratchet pawls, a clutch sleeve with three ratchet pawl outlets is sheathed on the centre shaft, the left end of the clutch sleeve is provided with a damping slide slot in which a magnet damping block is arranged, two bearings and two inner ratchet gears are arranged on the clutch sleeve, the two inner ratchet gears are supported by the two bearings, the right end of the clutch sleeve is provided with an inner output ratchet wheel, the front end of which is fixedly connected with a chain wheel, and an output gear engaged with the inner output ratchet wheel and two output driving gears capable of engaging with two inner ratchet wheels are arranged on a driven shaft. After the speed variator for the bicycle is arranged on the bicycle, the bicycle has flexible gear shifting, and because the utility model has no speed-variation members to be exposed, such as a pull wire, a pull rod, etc., the utility model has firmness and durability.

Description

Speed changer for non-motor vehicle

The utility model relates to a kind of change-speed box, particularly relates to the axis internal speed changer that a kind of variable speed bicycle is used.

Bicycle because easy to use, cheap, outward appearance is beautiful, particularly be of value to healthy by bike, and favored by consumers in general.Almost all there is bicycle in each family in China urban and rural residents, and the usage quantity of China's bicycle occupies first in the whole world, and in quite long one period, bicycle is still broad masses' the main vehicle in China.Increase along with automobile quantity, the vehicle exhaust pollution on the environment is more and more serious, become the pollution problem of a danger utmost point human health, this is except applying the improvement of no lead oil and automotive engine, increase the bicycle use amount, reducing traffic is an effective way with the automotive use amount, has caused global concern.Yet commercially available bicycle is cheap though style is a lot of at present, does not have breakthrough improvement, can be divided into ordinary bicycle and variable speed bicycle substantially.And the variable speed bicycle aesthetic appearance is poor, the backguy gearshift is not accurate enough, loaded down with trivial details insensitive, the random retaining of unstable properties love of speed operation, and variable-speed motor is exposed fragile outside.

The purpose of this utility model provides a kind of change-speed box, mainly is to be installed on the bicycle middle shaft, is the bicycle middle shaft internal speed changer, makes bicycle beautiful outline form, speed change accurate and sturdy and durable flexibly.

Above-mentioned purpose of the present utility model realizes by following technical proposals, that is:

Speed changer for non-motor vehicle comprises change speed gear box, main shaft, speed change ratchet assembly, output gear component.Change speed gear box is made up of casing and left and right end cap, and left and right end cap has axis hole by being bolted on the casing on left and right end cap.

At the main shaft middle part a plurality of ratchets chamber is arranged, at the indoor flat fire ratchet that is equiped with by straight spring supporting of each ratchet.Ratchet assembly comprises a plurality of inner ratch gears, output inner ratch gear, stop gear and clutch cover.A plurality of bar flute profile ratchet outlets that different angles offer that are are arranged on the clutch cover, the damping block chute is arranged, in the damping block chute, be equiped with the magnet damping block at the left end of clutch cover.Clutch cover is contained on the main shaft, the indoor flat fire ratchet of a plurality of ratchets on the main shaft, when main shaft reverses, can be respectively ratchet outlet from the clutch cover stretch out or indentation ratchet chamber.Be equiped with a plurality of bearings on clutch cover, its bearing number is identical with the inner ratch gear number.Stop gear is contained in the left end of clutch cover, and contacts with a detent, and stop gear can only be clockwise rotated.A plurality of inner ratch gears are contained on the clutch cover, and are supported by the bearing that is installed on the clutch cover respectively.When the bar flute profile ratchet outlet of a plurality of flat fire ratchets from clutch cover stretched out, can replace respectively on the interior ratchet of a corresponding inner ratch gear with it, the output inner ratch gear is installed in the clutch cover right-hand member, and is supported by the bearing in the bearing seat that is installed on the right end cap.The interior ratchet of output inner ratch gear can be replaced by a fast flat fire ratchet.The right-hand member of output inner ratch gear stretches out from the axis hole of right end cap, and captives joint with sprocket wheel by locating dowel pin.Output gear component, be to constitute by the output gear and a plurality of output drive gear that are fixed on the driven axle, the number of a plurality of output drive gears is identical with the number of inner ratch gear on being installed in clutch cover, and can corresponding mesh, but wherein has only a pair of in running order simultaneously.Output inner ratch gear and output gear engagement.The driven axle two ends are supported by the bearing in the bearing seat that is installed on the left and right end cap respectively.

Oil hole is arranged on change speed gear box, and oil hole is sealed by an embolism when non-oiling.

The utility model is contained on the bicycle, can realize the axis internal speed-changing of bicycle, and main shaft promptly is the axis of bicycle.

The utility model is installed on the bicycle, can realize the axis internal speed-changing, the axis inner speed change bicycle has good looking appearance, do not have any pull bar, backguy and other speed change parts to expose, therefore sturdy and durable, particularly, convenient, flexible by the pin realization of falling tap pedal speed change, be a breakthrough improvement in variable speed bicycle field.

Fig. 1 is a kind of example structure scheme drawing of the present utility model, and Fig. 2 is the A-A view of Fig. 1, and Fig. 3 is the B-B view of Fig. 1, and Fig. 4 is the clutch cover structural representation, and Fig. 5 is the right elevation of Fig. 4, and Fig. 6 is the axis structural representation, and Fig. 7 is the A-A view of Fig. 6.The utility model is described in further detail below in conjunction with the embodiment accompanying drawing.

The speed changer for non-motor vehicle of present embodiment for being installed in the axis internal speed changer on the bicycle, comprises change speed gear box, axis 1, speed change ratchet assembly and output gear component.Change speed gear box is made up of casing 2, left end cap 3, right end cap 4.On left end cap 3, the right end cap 4

axis hole

5 and 6 are arranged respectively.Left end cap 3, right end cap 4 are fixed on the left and right end face of casing 2 by screw 7 respectively.3 ratchet chambers 8 are arranged at the middle part of axis 1.A flat fire ratchet 9 is set in each ratchet chamber 8, and flat fire ratchet 9 lower ends have a universal-joint 10, universal-joint 10 to be installed in the hemisphere face groove 11 on 8 sidewalls of ratchet chamber.Each ratchet is indoor also to be arranged on a straight spring 12, and an end of straight spring 12 is replaced on flat fire ratchet 9, and the other end is fixed on the axis 1.

Pawl assembly comprises two inner ratch gears 13, output inner ratch gear 14, stop gear 15 and clutch cover 16.Three ratchet outlets 17 are arranged on the clutch cover 16, and the left end of clutch cover 16 has damping block chute 18, is equiped with magnet damping block 19 in damping block chute 18.At damping block chute 18 internal fixation locating dowel pin 20 is arranged.Clutch cover 16 is contained on the axis 1, when axis 1 rotates counterclockwise certain angle, three flat fire ratchets 9 can be respectively three ratchets outlets 17 from the clutch cover 16 stretch out or indentation.On clutch cover 16, be equiped with two bearings 21.Two inner ratch gears 13 are installed on the clutch cover 16 and are also supported by two bearings 21 respectively.Output inner ratch gear 14 is installed in the right-hand member of clutch cover 16, and the axis hole 5 of front end from right end cap 4 of output inner ratch gear 14 stretches out outside the change speed gear box, and captives joint with the sprocket wheel 22 on being contained in axis 1 by locating dowel pin, refills upper nut 23.The front end of axis 1 right-hand member and output inner ratch gear 14 is supported by the bearing 25 that is contained in two bearings 24 on the axis 1 and be contained in the bearing seat on the right end cap 4 respectively.The left end of axis 1 is supported by the bearing in the bearing seat that is contained on the left end cap 3 26.Stop gear 15 is installed in the left end of clutch cover 16, little axle 27 is arranged on left end cap 3, little axle 27 passes the axis hole of detent 28 rear ends, with jump ring 35 location, one end of one torsion spring 29 is fixed on the detent 28, the front end of detent 28 contacts with stop gear 15, and when axis 1 rotated counterclockwise certain angle, detent 28 was replaced on a ratchet on the detent 28.Output gear component is made of output gear 30 and two output drive gears 31 of being fixed on the driven axle 36.The radius difference of two output drive gears 31.Output gear 30 and 14 engagements of output inner ratch gear.Two output drive gears 31 can mesh with two inner ratch gears 14 respectively, but have only a pair of in running order simultaneously.The two ends of driven axle 36 are supported by the bearing 32 in the bearing seat that is installed on left end cap 3, the right end cap 4 respectively.Oil hole 33 is arranged on casing 2, and oil hole 33 is sealed by embolism 34.

Claims

1, speed changer for non-motor vehicle comprises change speed gear box, axis (1), speed change ratchet assembly and output gear component, and change speed gear box is made up of casing (2), left end cap (3), right end cap (4); On left end cap (3), the right end cap (4) axis hole (5) is arranged respectively, it is characterized in that:

There is a plurality of ratchets chamber (8) at the middle part of A, axis (1), in each ratchet chamber (8), a flat fire ratchet (9) is set, there is universal-joint (10) flat fire ratchet (9) lower end, universal-joint (10) is installed in the hemisphere face groove (11) on the sidewall of ratchet chamber (8), in each ratchet chamber (8) a straight spring (12) is set, one end of straight spring (12) is replaced on flat fire ratchet (9), and its other end is fixed on the axis (1);

B, speed change ratchet assembly comprise a plurality of inner ratch gears (13), output inner ratch gear (14), stop gear (15) and clutch cover (16); A plurality of ratchet outlets (17) are arranged on the clutch cover (16), and the left end of clutch cover (16) has damping block chute (18), is equiped with magnet damping block (19) in the damping block chute (18); Clutch cover (16) is contained on the axis (1), a plurality of flat fire ratchets (9) can be respectively a plurality of ratchets outlets (17) from the clutch cover (16) stretch out, on clutch cover (16), be equiped with a plurality of bearings (21); A plurality of inner ratch gears (13) are contained on the clutch cover (16), and are supported by a plurality of bearings (21) respectively; The front end of output inner ratch gear (14) is captiveed joint with the sprocket wheel (22) on being contained in axis (1) by locating dowel pin after the axis hole (5) on the right end cap (4) stretches out change speed gear box, and loads onto nut (23); The front end of axis (1) right-hand member and output inner ratch gear (14) is supported by the interior bearing (25) of bearing seat that is contained in two bearings (24) on the axis (1) and be contained on the right end cap (4) respectively, and the left end of axis (1) is supported by the bearing (26) in the bearing seat that is contained on the left end cap (3); Stop gear (15) is installed in the left end of clutch cover (16), the front end of one detent (28) contacts with stop gear (15), the shaft hole sleeve at detent (28) rear portion is contained on the little axle (27), little axle (27) is fixed on the left end cap (3), and an end of a torsion spring (29) is fixed on the detent (28);

C, output gear component, constitute by the output gear (30) and a plurality of output drive gear (31) that are fixed on the driven axle (36), the radius of a plurality of output drive gears (31) has nothing in common with each other, a plurality of output drive gears (31) can mesh with a plurality of inner ratch gears (13) respectively, but have only simultaneously a pair of in running order, output gear (30) with output inner ratch gear (14) engagement; The two ends of driven axle (29) are supported by the bearing (32) that is installed on left end cap (3) and the right end cap (4) respectively.

2, speed changer for non-motor vehicle according to claim 1 is characterized in that having oil hole (33) on change speed gear box, oil hole (33) is sealed by embolism (34).

3, speed changer for non-motor vehicle according to claim 1 and 2, it is characterized in that described a plurality of ratchets chambers (8) are 3 ratchet chambers (8), described a plurality of inner ratch gear (13) is two inner ratch gears (13), described a plurality of ratchet outlets (17) are three ratchet outlets (17), described a plurality of ratchet (9) is three ratchets (9), and described a plurality of output drive gears (31) are two output drive gears (31).