CN2748373Y - Gear drive mechanism of speed variable bicycle - Google Patents
Gear drive mechanism of speed variable bicycle Download PDFInfo
- Publication number
- CN2748373Y CN2748373Y CN 200420070798 CN200420070798U CN2748373Y CN 2748373 Y CN2748373 Y CN 2748373Y CN 200420070798 CN200420070798 CN 200420070798 CN 200420070798 U CN200420070798 U CN 200420070798U CN 2748373 Y CN2748373 Y CN 2748373Y
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- CN
- China
- Prior art keywords
- roller
- gear
- bearing
- conical
- retainer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a gear drive mechanism of a speed variable bicycle, comprising a middle shaft gearbox assemblage, a transmission shaft assemblage and a rear shaft assemblage, which is characterized in that the traditional ball rolling support bearing is changed into a conical roller rolling bearing, the conical roller rolling bearing is composed of an inner sleeve, an outer sleeve a roller and a holder which is between the inner sleeve and the outer sleeve. The section of the roller is a trapezoidal cone cylinder, the holder is a cone circular ring, the peripheral face of the circular ring is provided with a trapezoidal hole which is corresponding to the roller, the trapezoidal hole is a little bit smaller than the section of the roller, the roller is arranged in the trapezoidal hole of the holder, the roller is loose inserted in the groove of the inner sleeve, the outer sleeve is made into a sleeve pipe whose inner wall is a conical face and the outer wall is a straight face, the sleeve pipe is sheathed at the external side of the holder, and the roller part exposed out from the trapezoidal hole of the holder is contact with the inner wall conical face of the outer sleeve. The conical roller rolling bearing is installed on the gear drive mechanism of the bicycle, the good contact of a bearing roller and the inner and outer sleeves ensures the normal operation of the gear drive mechanism, and the gear drive efficiency and the service life of the drive mechanism are improved effectively.
Description
Technical field
The utility model belongs to transmission mechanism of bicycle, relates in particular to a kind of variable speed bicycle gear drive.
Background technology
At present, the bicycle that people widely use mostly adopts chain gear, and its shortcoming is, chain comes off easily, and transmitting ratio is non-constant, variable speed bicycle especially, and chain is exposed outside, stain the bottom of s trouser leg when riding, and driving efficiency is not high.Be head it off, people develop gear driving bicycle, the structure of its gear driving bicycle is to be assembled by the axis gear case, transmission shaft assembling and rear axle assembly, axis props up with bearings at both ends and is housed in before the gear in the casing, the gear wheel shaft engagement of gear that its axis middle part is fixing and bearing supporting, this gear is paid through preceding bevel gear and is connected transmission shaft longitudinally, these transmission shaft two ends are respectively by being contained in preceding casing, front and back bearings supporting in the back cover, pay by the ratchet core through screw bevel gear the rear end of this transmission shaft, ratchet, spring coil is formed is sleeved on back large bevel gear core on the rear axle, back large bevel gear, bearing, the arrangement of clutch that bearing is blocked connects.This bicycle with gear transmission replacement chain gear has good transmitting ratio, makes people reach the laborsaving purpose of fast speed again by bike the time, and driving efficiency is better than chain gear efficient.But because each gear is to be supported by bearing, and block bearing all adopts traditional bicycle ball antifriction-bearing box, this bearing is owing to be to adopt ball as rolling body, the interior ring and the outer shroud area of contact of its ball and bearing are little, the localized wear of bearing is serious, particularly when transmission device produced axial motion, bearing was more fragile, has a strong impact on the service life of gear-driven efficiency and bicycle.
Summary of the invention
The purpose of this utility model provides a kind of dependable performance, gear-driven efficiency height, the variable speed bicycle gear drive of transmission device long service life.
According to variable speed bicycle gear drive of the present utility model, comprise the assembling of axis gear case, transmission shaft assembling and rear axle assembling, axis is propped up by bearings at both ends and is housed in before the gear in the casing, the gear wheel shaft engagement of gear that its axis middle part is fixing and bearing supporting, described gear wheel shaft is paid through preceding bevel gear and is connected transmission shaft longitudinally, described transmission shaft two ends are respectively by being contained in preceding casing, front and back bearings in the back cover, supporting, pay by the ratchet core through screw bevel gear the rear end of described transmission shaft, ratchet, spring coil is formed is sleeved on back large bevel gear core on the rear axle, back large bevel gear, block bearing, the arrangement of clutch that bearing is blocked connects, it is characterized in that described block bearing adopts the conical roller antifriction-bearing box, its conical roller antifriction-bearing box is by interior, overcoat and be located in, retainer between the overcoat, roller is formed, roller is that the cross section is trapezoidal taper cylinder, retainer is a cone-shaped ring, have corresponding along side face but be slightly less than the trapezoidal hole in roller cross section with roller, come between roller in the trapezoidal hole of retainer, and in the groove that puts in it is embedded in loosely, it is the conical surface that overcoat is made inwall, outer wall is the sleeve pipe of facing directly, be sleeved on the retainer outside, roller be exposed at the outer part of retainer trapezoidal hole with the conical surface of inboard wall of overcoat contact.
The utility model has the advantages that,, guaranteed that bearing roller contacts with the good of interior overcoat, has improved the service life of gear-driven efficiency and transmission device effectively owing to adopted the conical roller antifriction-bearing box of said structure on each gear drive.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the amplification view of the utility model bolster.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to accompanying drawing 1,2, the utility model variable speed bicycle gear drive, comprise the assembling of axis gear case, transmission shaft assembling and rear axle assembling, axis 5 is housed in before the gear in the casing 6 by 5 of bearings at both ends, gear 4 and bearing supporting 2 that its axis 5 middle parts are fixing, 8 gear wheel shaft 3 engagements, described gear wheel shaft 3 pays 7 through preceding bevel gear, 9 connect transmission shaft 11 longitudinally, described transmission shaft 11 two ends are respectively by casing 6 before being contained in, front and back bearings 10 in the back cover 13,12 supportings, pay by the ratchet core through screw bevel gear the rear end of institute's transmission shaft 11, ratchet, spring coil is formed is sleeved on back large bevel gear core on the rear axle 1, back large bevel gear, block bearing, the arrangement of clutch that bearing is blocked connects, it is characterized in that described block bearing adopts the conical roller antifriction-bearing box, its conical roller antifriction-bearing box is by interior, overcoat 16,14 and be located in, overcoat 16, retainer 15 between 14, roller 17 is formed, roller 17 is trapezoidal taper cylinder for the cross section, retainer 15 is a cone-shaped ring, have corresponding along side face but be slightly less than the trapezoidal hole in roller 17 cross sections with roller 17,17 on roller comes in the trapezoidal hole of retainer 15, and in it is embedded in loosely in the groove of cover on 16, groove on the interior cover 16 has constituted the rib that is in contact with it for roller 17 end faces, guarantees that roller 17 rolls in the groove of interior cover 16; It is the conical surface that overcoat 14 is made inwall, and outer wall is the sleeve pipe of facing directly, is sleeved on retainer 15 outsides, roller 17 be exposed at the outer part of retainer 15 trapezoidal holes with the conical surface of inboard wall of overcoat 14 contact.When the conical roller antifriction-bearing box being installed on the gear drive of bicycle, bearing roller contacts with the good of interior overcoat, has guaranteed the normal operation of gear drive, has improved the service life of gear-driven efficiency and transmission device effectively.
Claims (1)
1, a kind of variable speed bicycle gear drive, comprise the assembling of axis gear case, transmission shaft assembling and rear axle assembling, axis is propped up by bearings at both ends and is housed in before the gear in the casing, the gear wheel shaft engagement of gear that its axis middle part is fixing and block bearing supporting, described gear wheel shaft is paid through preceding bevel gear and is connected transmission shaft longitudinally, described transmission shaft two ends are respectively by being contained in preceding casing, front and back block bearing supporting in the back cover, pay by the ratchet core through screw bevel gear the rear end of described transmission shaft, ratchet, spring coil is formed is sleeved on back large bevel gear core on the rear axle, back large bevel gear, block bearing, the arrangement of clutch that bearing is blocked connects, it is characterized in that described block bearing adopts the conical roller antifriction-bearing box, its conical roller antifriction-bearing box is by interior, overcoat and be located in, retainer between the overcoat, roller is formed, roller is that the cross section is trapezoidal taper cylinder, retainer is a cone-shaped ring, have corresponding along side face but be slightly less than the trapezoidal hole in roller cross section with roller, come between roller in the trapezoidal hole of retainer, and in the groove that puts in it is embedded in loosely, it is the conical surface that overcoat is made inwall, outer wall is the sleeve pipe of facing directly, be sleeved on the retainer outside, roller be exposed at the outer part of retainer trapezoidal hole with the conical surface of inboard wall of overcoat contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420070798 CN2748373Y (en) | 2004-09-27 | 2004-09-27 | Gear drive mechanism of speed variable bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420070798 CN2748373Y (en) | 2004-09-27 | 2004-09-27 | Gear drive mechanism of speed variable bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2748373Y true CN2748373Y (en) | 2005-12-28 |
Family
ID=35719865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420070798 Expired - Fee Related CN2748373Y (en) | 2004-09-27 | 2004-09-27 | Gear drive mechanism of speed variable bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2748373Y (en) |
-
2004
- 2004-09-27 CN CN 200420070798 patent/CN2748373Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |