CN204296355U - Rear drum structure - Google Patents
Rear drum structure Download PDFInfo
- Publication number
- CN204296355U CN204296355U CN201420722071.8U CN201420722071U CN204296355U CN 204296355 U CN204296355 U CN 204296355U CN 201420722071 U CN201420722071 U CN 201420722071U CN 204296355 U CN204296355 U CN 204296355U
- Authority
- CN
- China
- Prior art keywords
- axle
- ratchet
- rear drum
- sleeve
- ring
- 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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- Axle Suspensions And Sidecars For Cycles (AREA)
Abstract
The utility model discloses a kind of rear drum structure, it comprises: axle; Rear drum, it is set in axle, and can rotate relative to axle; Sleeve, it is set in axle, and can rotate relative to axle, and is provided with sleeve drive rear drum single direction rotation when ratchet structure rotates relative to axle with convenient sleeve between sleeve and rear drum.The utility model not only reduces its assembly and disassembly difficulty, and power transmission usefulness is high, avoids the phenomenon of idle running.
Description
Technical field
The utility model relates to a kind of rear drum structure, belongs to technical field of bicycles.
Background technology
At present, there is easy chain rupture, de-chain in conventional chains driving bicycle, drive disk assembly all exposes, corrosion phenomenon seriously, very easily makes the series of problems such as clothes dirty, and therefore axle-driven bicycle is the desirable vehicle replacing chain drive bicycle, especially in public bicycles field.
The rear drum be connected with axle-driven bicycle power transmission shaft at present, all the transformation and assembling carried out on the supporting rear drum basis of conventional chains bicycle, use the assembly and disassembly difficulty of the shaft driven bicycle trailing wheel of this rear drum very big, very easily damage the ratchet pawl of flower-drum inside, this is the major reason causing axle-driven bicycle there be limited evidence currently of to use in practice.
Summary of the invention
Technical problem to be solved in the utility model is the defect overcoming prior art, provides a kind of rear drum structure, and it not only reduces its assembly and disassembly difficulty, and power transmission usefulness is high, avoids the phenomenon of idle running.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of rear drum structure, and it comprises:
Axle;
Rear drum, it is set in axle, and can rotate relative to axle;
Sleeve, it is set in axle, and can rotate relative to axle, and is provided with sleeve drive rear drum single direction rotation when ratchet structure rotates relative to axle with convenient sleeve between sleeve and rear drum.
Further providing a kind of ratchet mechanism to realize it transmits power well and avoids its phenomenon dallied further, described ratchet mechanism comprises ratchet ring and pawl assembly, pawl assembly comprises jump ring and multiple ratchet, jump ring is arranged in the jump-ring slot of sleeve, multiple ratchet is movably connected on jump ring, ratchet ring is fixedly mounted in rear drum, multiple ratchet is meshed with ratchet ring and coordinates, when rotating to a direction relative to axle with convenient sleeve, the expansion of multiple ratchet makes ratchet and ratchet ring be in engagement and when sleeve rotates in the opposite direction relative to axle, multiple ratchet shrinks and makes ratchet and ratchet ring be in disengaged position.
Further provide a kind of structure of the support member that rear drum can be allowed to rotate in axle, the two ends of described rear drum are set in axle respectively by rotatable support structure, described rotatable support structure comprises axle bumper, steel ball and axle bowl, axle bumper is fixedly connected in axle, axle bowl is fixedly connected in rear drum, and steel ball is bearing between axle bumper and axle bowl.
Further in order to locate and lock rear drum, described axle has also been threaded locking nut, and is locked in axle by rotatable support structure respectively by locking nut.
Further in order to transmit power, described sleeve is fixedly connected with bevel gear.
After have employed technique scheme, when sleeve of the present utility model rotates forward relative to axle in power transmission process, owing to being provided with ratchet structure between sleeve and rear drum, and ratchet structure is in engagement state, it drives rear drum to rotate in the same direction, thus drive the rear wheel of bicycle to rotate, when sleeve of the present utility model reversely rotates, ratchet mechanism between sleeve and rear drum departs from, rear drum still can rotate forward, drive the rear wheel rolls forward of bicycle, and do not have to reversely rotate because of the reverse rotation of sleeve, achieve the transmission of power, and power transmission usefulness is high, avoid the phenomenon of idle running, in addition, just achieve unidirectional power transmission owing to have employed above simple structure, reduce its assembly and disassembly difficulty.
Accompanying drawing explanation
Fig. 1 is the structural representation of rear drum structure of the present utility model;
Fig. 2 is the assembling explosive view of rear drum structure of the present utility model;
Fig. 3 is the structural representation of sleeve part of the present utility model;
Fig. 4 is the structural representation of ratchet ring of the present utility model.
Detailed description of the invention
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail.
As shown in figures 1-4, a kind of rear drum structure, it comprises:
Axle 1;
Rear drum 2, it is set in axle 1, and can rotate relative to axle 1;
Sleeve 3, it is set in axle 1, and can rotate relative to axle 1, and is provided with sleeve 3 when ratchet structure rotates relative to axle 1 with convenient sleeve 3 between sleeve 3 and rear drum 2 and drives rear drum 2 single direction rotation.
As Fig. 2, 3, shown in 4, ratchet mechanism comprises ratchet ring 41 and pawl assembly, pawl assembly comprises jump ring 42 and multiple ratchet 43, jump ring 42 is arranged in the jump-ring slot of sleeve 3, multiple ratchet 43 is movably connected on jump ring 42, ratchet ring 41 is fixedly mounted in rear drum 2, multiple ratchet 43 is meshed with ratchet ring 41 and coordinates, when rotating to a direction relative to axle 1 with convenient sleeve 3, the expansion of multiple ratchet 43 makes ratchet 43 and ratchet ring 41 be in engagement and when sleeve 3 rotates in the opposite direction relative to axle 1, multiple ratchet 43 shrinks and makes ratchet 43 and ratchet ring 41 be in disengaged position.
As shown in Figure 2,3, 4, the two ends of rear drum 2 are set in axle 1 respectively by rotatable support structure, and rotatable support structure comprises axle bumper 51, steel ball and axle bowl, and axle bumper 51 is fixedly connected in axle 1, axle bowl is fixedly connected in rear drum 2, and steel ball is bearing between axle bumper 51 and axle bowl.
As shown in Figure 2,3, axle 1 has also been threaded locking nut 6, and is locked in axle 1 by rotatable support structure respectively by locking nut 6.
Sleeve 3 is fixedly connected with bevel gear.
Operation principle of the present utility model is as follows:
When sleeve 3 of the present utility model rotates forward relative to axle 1 in power transmission process, owing to being provided with ratchet structure between sleeve 3 and rear drum 2, and ratchet structure is in engagement state, it drives rear drum 2 to rotate in the same direction, thus drive the rear wheel of bicycle to rotate, when sleeve 3 of the present utility model reversely rotates, ratchet mechanism between sleeve 3 and rear drum 2 departs from, rear drum 2 still can rotate forward, drive the rear wheel rolls forward of bicycle, and do not have to reversely rotate because of the reverse rotation of sleeve 3, achieve the transmission of power, and power transmission usefulness is high, avoid the phenomenon of idle running, in addition, just achieve unidirectional power transmission owing to have employed above simple structure, reduce its assembly and disassembly difficulty.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the utility model solves are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a rear drum structure, is characterized in that, it comprises:
Axle (1);
Rear drum (2), it is set in axle (1), and can rotate relative to axle (1);
Sleeve (3), it is set in axle (1), and can rotate relative to axle (1), and be provided with sleeve (3) when ratchet structure rotates relative to axle (1) with convenient sleeve (3) between sleeve (3) and rear drum (2) and drive rear drum (2) single direction rotation.
2. rear drum structure according to claim 1, it is characterized in that: described ratchet mechanism comprises ratchet ring (41) and pawl assembly, pawl assembly comprises jump ring (42) and multiple ratchet (43), jump ring (42) is arranged in the jump-ring slot of sleeve (3), multiple ratchet (43) is movably connected on jump ring (42), ratchet ring (41) is fixedly mounted in rear drum (2), multiple ratchet (43) is meshed with ratchet ring (41) and coordinates, when rotating to a direction relative to axle (1) with convenient sleeve (3), multiple ratchet (43) expansion makes ratchet (43) and ratchet ring (41) be in engagement and when sleeve (3) rotates in the opposite direction relative to axle (1), multiple ratchet (43) shrinks and makes ratchet (43) and ratchet ring (41) be in disengaged position.
3. rear drum structure according to claim 1 and 2, it is characterized in that: the two ends of described rear drum (2) are set in axle (1) respectively by rotatable support structure, described rotatable support structure comprises axle bumper (51), steel ball and axle bowl, axle bumper (51) is fixedly connected in axle (1), axle bowl is fixedly connected in rear drum (2), and steel ball is bearing between axle bumper (51) and axle bowl.
4. rear drum structure according to claim 3, it is characterized in that: described axle (1) has also been threaded locking nut (6), and is locked in axle (1) by rotatable support structure respectively by locking nut (6).
5. rear drum structure according to claim 1, is characterized in that: described sleeve (3) is fixedly connected with bevel gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420722071.8U CN204296355U (en) | 2014-11-26 | 2014-11-26 | Rear drum structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420722071.8U CN204296355U (en) | 2014-11-26 | 2014-11-26 | Rear drum structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204296355U true CN204296355U (en) | 2015-04-29 |
Family
ID=53101930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420722071.8U Expired - Fee Related CN204296355U (en) | 2014-11-26 | 2014-11-26 | Rear drum structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204296355U (en) |
-
2014
- 2014-11-26 CN CN201420722071.8U patent/CN204296355U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20201126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |