CN208760337U - Bicycle drive shaft - Google Patents
Bicycle drive shaft Download PDFInfo
- Publication number
- CN208760337U CN208760337U CN201820743735.7U CN201820743735U CN208760337U CN 208760337 U CN208760337 U CN 208760337U CN 201820743735 U CN201820743735 U CN 201820743735U CN 208760337 U CN208760337 U CN 208760337U
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- China
- Prior art keywords
- fluted disc
- fixing seat
- right clutch
- special
- flower
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Abstract
The utility model relates to a kind of bicycle drive shafts, including hollow shaft, flower-drum body and ratchet housing, flower-drum body and ratchet housing pass through a pair of bearings respectively and are sheathed in hollow shaft, wherein flower-drum body is fixedly installed left clutch fluted disc inside the side of ratchet, ratchet is fixedly connected with shape tube close to flower-drum body side, and shape tube is set in hollow shaft.The fluted disc fixing seat that inner surface cross sectional shape mutually agrees with special-shaped tube outer surface cross sectional shape is arranged on shape tube, fluted disc fixing seat is provided with right clutch fluted disc close to the side of flower-drum body, and right clutch fluted disc is set on shape tube, left-right clutch fluted disc one way engagement.Bicycle drive shaft provided by the utility model can effectively prevent skidding between ratchet and flower-drum body, lead to job insecurity.
Description
Technical field
The utility model relates to a kind of bicycle drive shafts.
Background technique
Cycle wheel generally includes bicycle drive shaft component.Bicycle drive shaft component is located at the center of cycle wheel.
Traditional bicycle drive shaft component includes flower drum shaft, flower-drum main body, bearing unit, ratchet wheel body and locking component.Flower drum shaft installation
To cycle frame.Flower-drum main body is rotatably supported via bearing unit around flower drum shaft.Bearing unit is arranged in flower drum shaft
Between flower-drum main body.Locking hook is for rotating synchronously flower-drum main body and ratchet wheel body.
Traditional bicycle is united axis rear drum, and while flower-drum shell and ratchet group grafting, ratchet is collectively formed in the two
Detent mechanism generally forms ratchet mechanism on the inside of flower-drum shell one end, forms pawl structures on the outside of ratchet group one end, then
The connection positioning of flower-drum shell one end and ratchet group one end is realized by two Bearings, is then realizing the vehicle heart with one or two of Bearing
Connection with the flower-drum shell other end and the vehicle heart and the ratchet group other end and the vehicle heart positions, this kind of structure is due to click
Mechanism is collectively constituted by flower-drum shell and ratchet group, must be positioned using 4 Bearings, monovalent at high cost, processing time consuming,
Part requirements precision is higher, and expends the time since single part more, be also easy to malfunction, when bicycle riding, be easy when assembling
It breaks down.And it since pawl and ratchet do not have any protection structure, excessively exerts oneself if trampling, is easy when such as upward slope
It has skidded, causes not being driven between flower-drum body and ratchet wheel body, cause danger.
Utility model content
Purpose of utility model: the utility model discloses a kind of bicycle drive shafts, can be effectively prevented the ratchet of flower-drum
Transmission slip between flower-drum body, causes danger.
Technical solution: a kind of bicycle drive shaft, including hollow shaft, flower-drum body and ratchet housing, flower-drum body and ratchet housing
It is sheathed in hollow shaft, flower-drum body side is fixedly connected with left clutch fluted disc, left clutch fluted disc and right clutch fluted disc one way engagement, tooth
The special-shaped tailstock of disk fixing seat and ratchet housing is connected and is rotated synchronously, when trampling transmission, fluted disc fixing seat left side serrate slot
Cell wall holds out against the toothed projections upper section inclined-plane of right clutch gear right side, and bullet is equipped between right clutch gear and fluted disc fixing seat
Spring.
When idle running, fluted disc fixing seat left side serrate slot is located at the inclined-plane in the toothed projections of right clutch gear right side
It is interior, and the spacing between the top of toothed projections and tooth form trench bottom is greater than left clutch fluted disc and completely disengages with right clutch fluted disc
Required spacing.Right clutch fluted disc is sheathed on special-shaped tailstock, and the angle that right clutch fluted disc and special-shaped tailstock relatively rotate is 0.5 °
~3 °.
Special-shaped tailstock section is regular polygon, the cross sectional shape phase of the right clutch fluted disc inner ring shape and special-shaped tailstock
Together, the height of the right clutch fluted disc inner ring regular polygon is less than the catercorner length of special-shaped tailstock section regular polygon.
Specifically, right clutch fluted disc inner ring cross sectional shape is identical as the special-shaped outer ring cross sectional shape of tailstock and is hexagon.Right clutch tooth
The gap of disk inner ring and special-shaped tailstock outer ring is 0.2~1.5mm.
Specifically, the outer diameter of spring is equal to the interior of the right clutch fluted disc and the inner ring at fluted disc fixing seat fixed spring
Diameter.
Specifically, toothed projections upper section inclined-plane is rolled along fluted disc fixing seat direction of rotation when trampling to gear fixing seat one
Tiltedly, overall structure is the rectangle for being chamfered one jiao of excision, and the scarf obtained after one jiao of beveling excision is tooth form above-mentioned
The upper section inclined-plane of protrusion.The inclination angles θ on upper section inclined-plane is 20 °~50 °.
On the evenly spaced right side for being distributed in right clutch fluted disc of toothed projections, the evenly spaced distribution of serrate slot
On tooth form fixing seat left side, the quantity phase of the toothed projections quantity and the side of special-shaped tailstock section regular polygon
Together.
Right clutch fluted disc can relatively special-shaped tailstock rotate by a certain angle, toothed projections upper section inclined-plane is normal along ratchet housing
Rotation direction when transmission is tilted to fluted disc fixing seat side, and the width of fluted disc fixing seat contrate tooth profile slot is greater than toothed projections
Width；When bicyclist tramples, ratchet housing drives special-shaped tailstock to rotate synchronously, and special-shaped tailstock then drives fluted disc fixing seat to turn
Dynamic, the tooth form groove groove wall of fluted disc fixing seat and the inclined-plane of the toothed projections on right clutch gear push against, at this point, due to right clutch tooth
Disk is pushed against by fluted disc fixing piece, therefore can not be disengaged with left clutch fluted disc, so that right clutch fluted disc and left clutch fluted disc stable engagement
Transmission.When bicycle idle running, since ratchet housing is that no powered belt turn is dynamic, and cycle wheel drives flower-drum at this time
Body rotation is further driven to left clutch fluted disc rotation, and right clutch fluted disc can follow left clutch fluted disc to rotate certain angle at this time,
Right clutch fluted disc turn an angle after since the limitation of special-shaped tailstock can not be but right at this time again relative to special-shaped tailstock rotation
The toothed projections of clutch fluted disc disengage with the tooth form groove groove wall of fluted disc fixing seat and are located at serrate slot, at this time right clutch fluted disc
Meeting compressed spring and close fluted disc fixing seat, to be disengaged with left clutch fluted disc.
The utility model has the advantages that bicycle drive shaft provided by the utility model can be effectively prevented in ride in flower-drum
Portion's drive mechanism skids, and causes transmission process unstable, causes danger to bicyclist.
Detailed description of the invention
Fig. 1 is the front sectional view of the utility model；
Fig. 2 and Fig. 3 is the structural schematic diagram of the utility model gear fixed disk；
Fig. 4 and Fig. 5 is the structural schematic diagram of the left clutch fluted disc of the utility model；
Fig. 6 and Fig. 7 is the structural schematic diagram of the right clutch fluted disc of the utility model；
Attachment structure schematic diagram of the Fig. 8 between the utility model abnormal shape tailstock and ratchet housing；
Fig. 9 is that the utility model relative position of its toothed projections and contrate tooth profile groove groove wall when trampling transmission is illustrated.
Figure 10 is the side view of the right clutch fluted disc of the utility model and the cooperation of fluted disc fixing seat.
Specific embodiment
As shown in Figure 1, a kind of bicycle drive shaft, including hollow shaft 1, embossing gasket 2, aluminum side lid 3, first bearing 4, aluminium set
Pipe 5, flower-drum body 6, left clutch fluted disc 7, right clutch fluted disc 8, spring 9, fluted disc fixing seat 10, special-shaped tailstock 11, oil sealing 12, ratchet
Shell 13, second bearing 14, casing 15, c-type retaining ring 16, gasket 17.
Flower-drum body 6 passes through a pair of of first bearing 4 and is connected in hollow shaft 1, and aluminum casing 5 is equipped between a pair of of first bearing 4；
The aluminum side lid 3 being socketed in hollow shaft 1 and embossing gasket 2 are disposed on the left of flower-drum body 6；It is set on 6 right side inner wall of flower-drum body
There is cylinder step, is fixedly connected with left clutch fluted disc 7 thereon.
Ratchet housing 13 passes through a pair of of second bearing 14 and is connected in hollow shaft 1, and right side, which is disposed with, is socketed on sky
Aluminum side lid 3 and embossing gasket 2 in mandrel 1；Aluminum side lid 3 protrudes into ratchet housing 13, the second bearing 14 on end face and right side
End face between be equipped with gasket 17, casing 15 is provided between a pair of of second bearing 14,13 inner wall of ratchet housing is equipped with groove, recessed
The right side of outer ring of the c-type retaining ring 16 for resisting right side second bearing 14 is provided in slot.13 interior step pressure of ratchet housing
The left side of the outer ring of tight left side second bearing 14.
Oil sealing 12 is equipped at 6 outer ring of flower-drum body and 13 inner ring cooperation of ratchet housing.
It is threadably secured and is connected in ratchet housing 13 on the right side of special-shaped tailstock 11, special-shaped 11 external screw thread left distal end of tailstock
Place is provided with rotary table 111, and the left side of rotary table 111 is the shape tube 112 that section is hexagon；Right clutch fluted disc 8 is socketed in abnormal shape
It can horizontally slip on pipe 112 and with respect to shape tube 112, right clutch fluted disc 8 is equipped with the yin of one way engagement with left clutch fluted disc 7
Positive tooth.The inner ring cross sectional shape that right clutch fluted disc 8 and shape tube 112 cooperate is identical as the cross sectional shape of shape tube 112, is positive
The outer ring of hexagon, right 8 inner ring of clutch fluted disc and shape tube 112 is equipped with gap, the height of the regular hexagon of right 8 inner ring of clutch fluted disc
Degree needs to be less than the cornerwise length of shape tube 112, so that the angle that right clutch fluted disc 8 is relatively rotated with special-shaped tailstock 11
Control is within limits.Due to the angle that clutch fluted disc 8 and special-shaped tailstock 11 relatively rotate directly determine bicyclist from
Bicycle idling conditions tramples the angle that it needs to trample to normal drive state, therefore needs clutch fluted disc 8 and special-shaped tailstock
11 angles relatively rotated control between 0.5 °~3 °.It in the present embodiment can be by right 8 inner ring of clutch fluted disc and shape tube 112
Outer ring height gap control in 0.2mm~1.5mm.It is preferred that 0.5~1mm.
The right side of right clutch fluted disc 8 is provided with fluted disc fixing seat 10, and fluted disc fixing seat 10 is socketed on shape tube 112,
Inner surface cross sectional shape is identical as 112 outer surface cross sectional shape of shape tube and is fitted in the outer surface of shape tube 112, and fluted disc is solid
Reservation 10 and 112 tight fit of shape tube, so that when ratchet housing 13 drives special-shaped tailstock 11 to rotate, fluted disc is fixed when trampling
Seat 10 is rotated synchronously with special-shaped tailstock 11；Spring 9 is provided between fluted disc fixing seat 10 and right clutch fluted disc 8.As shown in Figure 1,
The side inner surface opposite with right clutch fluted disc 8 of fluted disc fixing seat 10 is equipped with cylindrical type step, and the outer diameter of spring 9 is equal to cylinder
The internal diameter of type step surface, spring 9 are placed in the cylindrical type step of fluted disc fixing seat 10 and right clutch fluted disc 8 and resist right clutch
Fluted disc 8 can prevent right clutch fluted disc 8 from shaking.
As shown in figure 9, arrow direction is 10 direction of rotation of fluted disc fixing seat, a left side for fluted disc fixing seat 10 when trampling
Serrate slot 101 is provided on side end face, 101 cell wall of serrate slot is when bicyclist tramples transmission and on right 8 right side of clutch fluted disc
Toothed projections 81 be in contact and be driven.It is oblique that the side of toothed projections 81 and 101 Contact Transmission of tooth form groove groove wall is equipped with upper section
Face 811,81 upper section inclined-plane 811 of toothed projections are rolled along 10 direction of rotation of fluted disc fixing seat when trampling to gear fixing seat 10 1
Tiltedly, overall structure is the rectangle for being chamfered one jiao of excision, and the scarf obtained after one jiao of beveling excision is tooth form above-mentioned
The upper section inclined-plane 811 of protrusion 81.As shown in figure 9, the shape makes toothed projections 81 also remain with top horizontal segment, this horizontal segment
Although not having drive connection with 101 side wall of serrate slot but the bonding strength with fluted disc fixing seat 10 can be enhanced.
When ratchet housing 13, which drives special-shaped tailstock 11 to be further driven to gear fixed disk 10, to be rotated synchronously, serrate slot 101
Near 811 midpoint of upper section inclined-plane for pushing against toothed projections 81 at cell wall fillet, so that right clutch fluted disc 8 is in gear fixed disk
It is engaged under the action of 10 with left clutch fluted disc 7, so that left clutch fluted disc 7 drives flower-drum body 6 is synchronous with ratchet housing 13 to turn
It is dynamic.Gear fixed disk 10 is not only able to drive right clutch fluted disc 8 and rotates at this time, additionally it is possible to apply one to right clutch fluted disc 8
Pressure to the left, so that right clutch fluted disc 8 and left 7 stable engagement of clutch fluted disc, and be unlikely to cause since driving torque is excessive
It skids, influences to be driven effect.
Left clutch fluted disc 7 skids with right clutch fluted disc 8 in order to prevent, needs to be arranged according to upper section inclined-plane 811 for theory
It is more steeper better, fluted disc fixing seat 10 just can be bigger to the power of right clutch fluted disc 8 to the left at this time, but if setting it is too steep again
Meeting is so that the power of fluted disc fixing seat 10 and right 8 Contact Transmission of clutch fluted disc reduces, therefore the ramp angles θ on upper section inclined-plane 811 needs
Between 20 °~50 °, preferred scope is 30 °~45 ° for control.
As shown in Figure 10, on the evenly spaced right side for being distributed in right clutch fluted disc 8 of toothed projections 81, serrate slot 101
Evenly spaced to be distributed on 10 left side of tooth form fixing seat, 81 quantity of toothed projections and 11 section of special-shaped tailstock are just polygon
The quantity on the side of shape is identical.Such structure be in order to when right 8 inner ring of clutch fluted disc whichsoever side be aligned special-shaped tailstock certain
When a line, toothed projections 81 and 101 relative position of serrate slot being distributed thereon are the same.In the present embodiment, as schemed
Shown in 10, the outer ring cross-section of special-shaped tailstock 11 uses regular hexagon therefore chooses toothed projections 81 as three, and serrate slot 101 is 6 teeth
The corner that 101 cell wall of shape slot is contacted with upper section inclined-plane 811 is provided with fillet 1011.When 81 quantity of toothed projections is equal to special-shaped tail
When the quantity on 11 outer rings of seat and 8 inner ring regular polygon side of right clutch fluted disc, when right clutch fluted disc 8 is installed on shape tube by needs
When on 112, can directly it be assembled without being directed inside and outside circle.If being all directly designed to identical quantity 3 during installation
If wanting to guarantee, pushing against toothed projections 81 when fluted disc fixing seat 10 tramples rotation at its 101 cell wall fillet of serrate slot has upper section inclined-plane
811 side then needs to proofread position, is otherwise easy to appear when fluted disc fixing seat 10 turns an angle, with toothed projections
81 is more and more remoter from obtaining instead.
In the present embodiment, the specific working principle is as follows:
When bicyclist tramples, fluted disc fixing seat 10 follows ratchet housing 13 to rotate, serrate slot after turning an angle
The turning of 101 cell walls just resists the upper section inclined-plane 811 of right 8 toothed projections of clutch fluted disc, at this time fluted disc fixing seat 10 given it is right from
The power and a power tangent with rotation direction of fluted disc one to the left are closed, so that right clutch fluted disc 8 is engaged with left clutch fluted disc 7
Transmission.
When bicyclist no longer tramples, bicycle voluntarily dallies (when such as descending), and flower-drum body drives left clutch at this time
Fluted disc 7 rotates, and right clutch fluted disc 8 then follows left clutch fluted disc 7 to rotate and disengage with the cell wall of serrate slot 101, at this time due to a left side
Clutch fluted disc 7 and right clutch fluted disc 8 are one way engagement, i.e., can only be that right clutch fluted disc 8 drives left clutch fluted disc 7 to rotate, still
Since cornerwise length of the outer ring regular hexagon of shape tube 112 is greater than the height of right 8 inner ring regular hexagon of clutch fluted disc
, therefore after the opposite shape tube 112 of right clutch fluted disc 8 turns an angle, right clutch is resisted at the diagonal line of shape tube 112
8 inner ring of fluted disc prevents its relative rotation.The toothed projections 81 of right clutch fluted disc 8 are located at 101 inside of serrate slot at this time, due to squeezing
Acting on and resist without 101 cell wall of serrate slot then can be towards movement at fluted disc fixing seat 10, i.e. the end face of toothed projections 81 is more next
Closer to 101 bottom of serrate slot, until being completely disengaged with left clutch fluted disc 7.
When bicyclist continues to trample, it only need to trample certain angle and 101 cell wall of serrate slot is made to resist toothed projections again
81 upper section inclined-plane 811 may make right clutch fluted disc 8 and left clutch fluted disc 7 engaged transmission again.
Although only having write out the state when shape tube 112 is regular hexagon in the present embodiment, as long as remaining
Regular polygon and it can guarantee that right clutch fluted disc 8 relatively rotates angle control with shape tube 112 and belongs to this reality in certain angle
Within the scope of applying disclosed in example.
Claims (10)
1. a kind of bicycle drive shaft, including hollow shaft (1), flower-drum body (6) and ratchet housing (13), the flower-drum body (6) and spine
Wheel shell (13) is sheathed on hollow shaft (1), it is characterised in that: flower-drum body (6) side is fixedly connected with left clutch fluted disc
(7), left clutch fluted disc (7) and right clutch fluted disc (8) one way engagement, the special-shaped tail of fluted disc fixing seat (10) and ratchet housing (13)
Seat (11) is connected and is rotated synchronously, and when trampling transmission, fluted disc fixing seat (10) left side serrate slot (101) cell wall holds out against right clutch
Toothed projections (81) upper section inclined-plane (811) of gear (8) right side, sets between right clutch gear (8) and fluted disc fixing seat (10)
There are spring (9).
2. bicycle drive shaft according to claim 1, it is characterised in that: when idle running, right clutch gear (8) right side
Toothed projections (81) on inclined-plane at be located in fluted disc fixing seat (10) left side serrate slot (101), and toothed projections
(81) the spacing between top and serrate slot (101) bottom is greater than left clutch fluted disc (7) and completely disengages with right clutch fluted disc (8)
Required spacing.
3. bicycle drive shaft according to claim 2, it is characterised in that: right clutch fluted disc (8) is sheathed on special-shaped tailstock
(11) on, the angle that right clutch fluted disc (8) and special-shaped tailstock (11) relatively rotate is 0.5 °~3 °.
4. bicycle drive shaft according to claim 3, it is characterised in that: described abnormal shape tailstock (11) section is positive polygon
Shape, the interior loop-shaped of the right clutch fluted disc (8) is identical as the cross sectional shape of special-shaped tailstock (11), in the right clutch fluted disc (8)
The height for enclosing regular polygon is less than the catercorner length of special-shaped tailstock (11) section regular polygon.
5. bicycle drive shaft according to claim 4, it is characterised in that: right clutch fluted disc (8) the inner ring cross sectional shape
It is identical as the outer ring cross sectional shape of special-shaped tailstock (11) and be hexagon.
6. bicycle drive shaft according to claim 5, it is characterised in that: right clutch fluted disc (8) inner ring and special-shaped tail
The gap of seat (11) outer ring is 0.2~1.5mm.
7. bicycle drive shaft according to claim 1, it is characterised in that: the outer diameter of the spring (9) be equal to it is described it is right from
Close the internal diameter of the inner ring at fluted disc (8) and fluted disc fixing seat (10) fixed spring (9).
8. described in any item bicycle drive shafts according to claim 1~7, it is characterised in that: toothed projections (81) upper section
Inclined-plane (811) is tilted along fluted disc fixing seat (10) direction of rotation when trampling to gear fixing seat (10) side, overall structure
For the rectangle for being chamfered one jiao of excision, the scarf obtained after one jiao of beveling excision is the upper section of toothed projections above-mentioned (81)
Inclined-plane (811).
9. bicycle drive shaft according to claim 8, it is characterised in that: the inclination angles θ of the upper section inclined-plane (811)
It is 20 °~50 °.
10. bicycle drive shaft according to claim 4, it is characterised in that: evenly spaced point of the toothed projections (81)
For cloth on the right side of right clutch fluted disc (8), the serrate slot (101) is evenly spaced to be distributed in the tooth form fixing seat (10)
On left side, toothed projections (81) quantity is identical as the quantity on side of special-shaped tailstock (11) section regular polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820743735.7U CN208760337U (en) | 2018-05-17 | 2018-05-17 | Bicycle drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820743735.7U CN208760337U (en) | 2018-05-17 | 2018-05-17 | Bicycle drive shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208760337U true CN208760337U (en) | 2019-04-19 |
Family
ID=66126154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820743735.7U Active CN208760337U (en) | 2018-05-17 | 2018-05-17 | Bicycle drive shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208760337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437699A (en) * | 2018-05-17 | 2018-08-24 | 雅瑟斯精密机械(江苏)有限公司 | Bicycle drive shaft |
-
2018
- 2018-05-17 CN CN201820743735.7U patent/CN208760337U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437699A (en) * | 2018-05-17 | 2018-08-24 | 雅瑟斯精密机械(江苏)有限公司 | Bicycle drive shaft |
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