CN108583770A - Cam-type bicycle speed-varying unit - Google Patents
Cam-type bicycle speed-varying unit Download PDFInfo
- Publication number
- CN108583770A CN108583770A CN201711499389.9A CN201711499389A CN108583770A CN 108583770 A CN108583770 A CN 108583770A CN 201711499389 A CN201711499389 A CN 201711499389A CN 108583770 A CN108583770 A CN 108583770A
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- CN
- China
- Prior art keywords
- cam
- roll adjustment
- pulley
- axis
- rear axle
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
Abstract
The present invention relates to bicycle arts, and in particular to a kind of cam-type bicycle speed-varying unit, including：The fixing end of axis, axis is rotationally connected with axis shell, and the movable end of axis is pierced by axis shell；Driving pulley, driving pulley include the first fast pulley being fixed on axis and the first movable pulley being socketed on axis；Rear axle；Driven pulley, driven pulley are set on rear axle；Transmission belt, transmission belt is on driving pulley and driven pulley；Cam mechanism, cam mechanism includes the first roll adjustment cylinder being rotationally set on axis and the first end face cam for being located at axis shell one end, one end of first roll adjustment cylinder is equipped with second end face cam, and the other end is connected on the first movable pulley, and first end face cam and second end face cam abut against.The torque of the first roll adjustment cylinder is converted into its movement in the axial direction by the cooperation of first end face cam and second end face cam, and then adjusts the spacing of the first fast pulley and the first movable pulley.
Description
Technical field
The present invention relates to bicycle arts, more particularly to a kind of cam-type bicycle speed-varying unit.
Background technology
Currently, bicycle shift transmission system is mainly based on turriform toothed disc type chain gear.Based on this speed change
The physical arrangement and operating feature of device are easy to happen the failures such as card chain, de- chain, especially in busy shift during use
Or in the case of extensive style use, above-mentioned failure will necessarily occur again and again.
Invention content
To solve the above-mentioned problems, the object of the present invention is to provide a kind of cam-type bicycle speed-varying unit, user is rotatable
The first roll adjustment cylinder adjusts the spacing of the first fast pulley and the first movable pulley.
Based on this, the present invention provides a kind of cam-type bicycle speed-varying units, including：
The fixing end of axis, the axis is rotationally connected with the axis shell of tubular, and the movable end of the axis is pierced by institute
State axis shell；
Driving pulley, the driving pulley include the first fast pulley being fixed on the movable end of the axis and can not phases
To being rotationally socketed in the first movable pulley that on the movable end of the axis and can be slid axially；
Rear axle；
Driven pulley, the driven pulley are set on the rear axle；
Transmission belt, the transmission belt is on the driving pulley and driven pulley；
Cam mechanism, the cam mechanism include first that is rotationally set on the axis and can slide axially
One end of roll adjustment cylinder and the first end face cam for being located at the axis shell one end, the first roll adjustment cylinder is equipped with second end face
The other end of cam, the first roll adjustment cylinder is rotationally connected on first movable pulley, the first end face cam and
Biend cam abuts against.
Preferably, the driven pulley include the wheel hub for being socketed in the rear axle the second fast pulley and with it is described
Second fast pulley can not relatively rotate setting and the second movable pulley that can slide axially, the rear axle and the second movable pulley it
Between be equipped with roll adjustment component for driving second movable pulley to slide axially.
Preferably, the roll adjustment component is elastic component, one end of the elastic component is connected to the rear axle, the other end
It is connected to second movable pulley.
Preferably, the roll adjustment component includes that is rotationally set on the rear axle and can slide axially
One end of two roll adjustment cylinders and the third edge cam being set on the rear axle, the second roll adjustment cylinder is convex equipped with the 4th end face
Wheel, the other end of the second roll adjustment cylinder are rotationally connected on second movable pulley, the third edge cam and the 4th
Edge cam abuts against.
Preferably, the roll adjustment component is ball screw, the screw rod part of the ball screw is set in the rear axle
On, one end of the nut element of the ball screw is rotationally connected on second movable pulley.
Preferably, the lateral wall of the first roll adjustment cylinder is equipped with the first roll adjustment driving lever.
Preferably, the lateral wall of the second roll adjustment cylinder is equipped with the second roll adjustment driving lever.
Preferably, the lateral wall of the nut element of the ball screw is equipped with third roll adjustment driving lever.
Preferably, being equipped with unilateral bearing between the driven pulley and the wheel hub of rear axle.
Preferably, the cam face of the first end face cam and second end face cam is smooth surface.
One end of the cam-type bicycle speed-varying unit of the present invention, axis shell is equipped with first end face cam, the first roll adjustment cylinder
One end be equipped with second end face cam, the other end of the first roll adjustment cylinder is rotationally connected on the first movable pulley, passes through first end
The torque of first roll adjustment cylinder is converted to its movement in the axial direction by the cooperation of face cam and second end face cam, and then is adjusted
The spacing of first fast pulley and the first movable pulley.
Description of the drawings
Fig. 1 is the middle shaft structure schematic diagram of the cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 2 is the axis partial cutaway schematic view of the cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 3 is one of rear axle structural schematic diagram of cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 4 is the rear axle second structural representation of the cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 5 is the rear axle third structural representation of the cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 6 is one of the overall structure diagram of the cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 7 is the two of the overall structure diagram of the cam-type bicycle speed-varying unit of the embodiment of the present invention；
Fig. 8 is the three of the overall structure diagram of the cam-type bicycle speed-varying unit of the embodiment of the present invention.
Wherein, 1, axis；11, axis shell；11a, first end face cam；12, the first roll adjustment cylinder；12a, second end face are convex
Wheel；12b, the first roll adjustment driving lever；2, driving pulley；21, the first fast pulley；22, the first movable pulley；3, rear axle；31, third end face
Cam；32, wheel hub；33, unilateral bearing；4, driven pulley；41, the second fast pulley；42, the second movable pulley；5, transmission belt；6, it adjusts
Away from component；61, elastic component；62, the second roll adjustment cylinder；62a, the 4th edge cam；62b, the second roll adjustment driving lever；63, ball screw；
63a, screw rod part；63b, nut element；63c, third roll adjustment driving lever；7, plane bearing；8, vehicle frame；9, connector.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
In conjunction with shown in Fig. 1, Fig. 2 and Fig. 6, the cam-type bicycle speed-varying unit of the present invention is schematically showed, including：In
Axis 1, driving pulley 2, rear axle 3, driven pulley 4, transmission belt 5 and cam mechanism, the fixing end of axis 1 are rotationally connected with cylindrical shape
Axis shell 11, the movable end of axis 1 is pierced by axis shell 11, and driving pulley 2 includes being fixed on the movable end of axis 1
First fast pulley 21 and the first movable pulley 22 not being socketed in rotatably on the movable end of axis 1, the first movable pulley 22
Can sliding axially along axis 1, driven pulley 4 is then set on rear axle 3, is wound between driving pulley 2 and driven pulley 4
Transmission belt 5 for transmission.Unilateral bearing 33 is equipped between driven pulley 4 and the wheel hub 32 of rear axle 3, so that user is scrunching certainly
When driving pedal, unilateral bearing 33 locks the wheel hub 32 of driven pulley 4 and rear axle 3, and power can be output to from driven pulley 4
On the wheel hub 32 of rear axle 3, and user is when scrunching bicycle pedal, and unilateral bearing 33 allows the wheel of driven pulley 4 and rear axle 3
Hub 32 relatively rotates, and the wheel hub 32 of the rear axle 3 constantly rotated will not then drive driven pulley 4 to rotate.Cam mechanism includes
It is rotationally set on axis 1 and the first roll adjustment cylinder 12 that can slide axially and is located at the first of 11 one end of axis shell
One end of edge cam 11a, the first roll adjustment cylinder 12 are equipped with second end face cam 12a, and the other end of the first roll adjustment cylinder 12 is rotationally
It is connected on the first movable pulley 22 so that the first roll adjustment cylinder 12 will not follow the first movable pulley 22 to rotate, first end face cam 11a
It is abutted against with second end face cam 12a；It should be noted that axis shell 11 is connected with cycle frame 8, when force rotates
When the first roll adjustment cylinder 12, first end face cam 11a and second end face cam 12a relatively rotate, since the two abuts against, root
According to the physical arrangement of edge cam, the torque of the two can be converted into the relative displacement of the two in the axial direction, i.e. the first roll adjustment
After the rotation of axis shell 11, the first roll adjustment cylinder 12 can slide cylinder 12 on axis 1, and then push or pull the first sliding
Wheel 22 slides on axis 1, to change the spacing between the first movable pulley 22 and the first fast pulley 21, is infinitely changed with this
The gear ratio of the speed changer.In addition, the lateral wall of the first roll adjustment cylinder 12 is equipped with the first roll adjustment driving lever 12b, by being adjusted to first
It exerts a force away from driving lever 12b, you can the first roll adjustment cylinder 12 of rotation.
It is also to be noted that in some embodiments, it is only necessary to driving pulleys 2 to carry out stepless change for the speed changer
Speed, and driven pulley 4 can add 5 strainer of a transmission belt (not shown) to adjust in such an embodiment without speed changing function
Save the tensioning of transmission belt 5.
And in the present embodiment, driven pulley 4 can also carry out variable speed.Driven pulley 4 includes the wheel for being socketed in rear axle 3
Second fast pulley 41 of hub 32 and the second cunning that can not be relatively rotated setting with the second fast pulley 41 and can slide axially
Driving wheel 42 is equipped between rear axle 3 and the second movable pulley 42 for driving the roll adjustment component 6 that the second movable pulley 42 slides axially,
Roll adjustment component 6 is the spacing of changeable second movable pulley 42 and the second fast pulley 41, and then infinitely changes the change of the speed changer
Speed ratio；Wherein, the wheel hub 32 of rear axle 3 is for installing bicycle rear, certainly, according to the actual design demand of bicycle structure,
Rear axle 3 affixed can not be fixed on bicycle rack 8 yet, likewise, the wheel hub 32 of rear axle 3 affixed can not be fixed in voluntarily yet
On vehicle frame 8.
Specifically, roll adjustment component 6 is preferably elastic component 61, and in conjunction with shown in Fig. 3, elastic component 61 is spring, elastic component 61
One end be connected to rear axle 3, the other end is connected to the second movable pulley 42, according to the load of transmission belt 5, the second movable pulley 42 and
Two fast pulleys 41 can adapt to the spacing under the load automatically under the elastic force effect of elastic component 61, since spring can not be adjusted freely
Its flexible length, especially bicycle are saved when large torque exports power, spring can be forced to shrink, and cannot keep user's needs
Transmission range, but the roll adjustment component 6 of spring is most simple compared to other 6 structures of roll adjustment component, light weight, therefore is applicable in
In needing light-weight design and the lower bicycle of design (calculated) load.Roll adjustment component 6 can also be the knot similar to cam mechanism
Structure, in conjunction with shown in Fig. 4, roll adjustment component 6 includes the second roll adjustment cylinder 62 that is rotationally set on rear axle 3 and can slide axially
It is equipped with the 4th edge cam 62a with one end of the third edge cam 31 being set on rear axle 3, the second roll adjustment cylinder 62, second adjusts
The other end away from cylinder 62 is rotationally connected on the second movable pulley 42 so that the second roll adjustment cylinder 62 will not follow the second movable pulley 42
Rotation, third edge cam 31 and the 4th edge cam 62a are abutted against；It is similar with cam mechanism, when force rotates the second roll adjustment
When cylinder 62, the torque of third edge cam 31 and the 4th edge cam 62a can be converted into the opposite position of the two in the axial direction
It moving, i.e. the second roll adjustment cylinder 62 can slide on axis 1, and then push or pull the second movable pulley 42 and slided on axis 1, to
Change the spacing between the second movable pulley 42 and the second fast pulley 41, variable speed is carried out with this.The outside of second roll adjustment cylinder 62
Wall is equipped with the second roll adjustment driving lever 62b, by the second roll adjustment driving lever 62b forces, you can the second roll adjustment cylinder 62 of rotation.Roll adjustment group
Part 6 also preferably be ball screw 63, in conjunction with shown in Fig. 5, wherein the screw rod part 63a of ball screw 63 be it is columnar structured,
Thread groove is located at the lateral wall of screw rod part 63a, and screw rod part 63a is set on rear axle 3, and the nut element 63b of ball screw 63 is arranged
Outside screw rod part 63a, ball is equipped between screw rod part 63a and nut element 63b, nut element 63b is rotated with screw rod part 63a
When, nut element 63b can be moved on the axial direction of screw rod part 63a；One end of nut element 63b is rotationally connected to the second cunning
On driving wheel 42 so that nut element 63b will not be rotated with the rotation of the second movable pulley 42, when exert a force rotating screw cap part 63b when,
Nut element 63b can be axially moveable on screw rod part 63a, and then pushed or pullled the second movable pulley 42 and slided on rear axle 3, into
And change the spacing between the second movable pulley 42 and the second fast pulley 41, variable speed is carried out with this.The nut of ball screw 63
The lateral wall of part 63b is equipped with third roll adjustment driving lever 63c, stirs third roll adjustment driving lever 63c by force, you can rotating screw cap part
63b.Some export for more stable bicycle speed change precision demand higher, torque, using cam-type or ball
The regulating module 6 of screw is undoubtedly better choice, and above two regulating module 6 can accurately adjust the second movable pulley
42 and second fast pulley 41 spacing.Further, regulating module of the regulating module 6 of ball bearing screw type compared to cam-type
6 is more smooth during speed governing, this is attributed to the fact that the ball in ball screw.
In conjunction with shown in Fig. 7 and Fig. 8, which further includes a connection piece 9, and the both ends of connector 9 rotationally connect respectively
It is rotationally connected with the first roll adjustment respectively in the first roll adjustment driving lever 12b and the both ends of the second roll adjustment driving lever 62b or connector 9
Driving lever 12b and third roll adjustment driving lever 63c, user only need to push or pull connector 9, you can while adjusting 22 He of the first movable pulley
The spacing of the spacing of first fast pulley 21 and the second movable pulley 42 and the second fast pulley 41.Certainly, can also increase on connector 9
If spring, connector 9 can be automatically reset.
In order to optimize the speed changer, one end of the first roll adjustment cylinder 12 is rotationally connected to the first sliding by plane bearing 7
On wheel 22, the first roll adjustment cylinder 12 is set rotationally to be connected on the first movable pulley 22 with this.First end face cam 11a and second end face
The cam face of cam 12a is smooth surface, and setting in this way may make cam mechanism more to be smoothed out during speed change.
In conclusion the cam-type bicycle speed-varying unit of the present invention, one end of axis shell 11 is equipped with first end face cam
11a, one end of the first roll adjustment cylinder 12 are equipped with second end face cam 12a, and the other end of the first roll adjustment cylinder 12 is rotationally connected to the
On one movable pulley 22, the torque of the first roll adjustment cylinder 12 is turned by the cooperation of first end face cam 11a and second end face cam 12a
It is changed to its movement in the axial direction, and then adjusts the spacing of the first fast pulley 21 and the first movable pulley 22.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these improve and replace
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of cam-type bicycle speed-varying unit, which is characterized in that including：
Axis, the fixing end of the axis are rotationally connected with the axis shell of tubular, the movable end of the axis be pierced by it is described in
Shaft housing；
Driving pulley, the driving pulley include the first fast pulley being fixed on the movable end of the axis and opposite can not turn
It is socketed in the first movable pulley that on the movable end of the axis and can be slid axially dynamicly；
Rear axle；
Driven pulley, the driven pulley are set on the rear axle；
Transmission belt, the transmission belt is on the driving pulley and driven pulley；
Cam mechanism, the cam mechanism include the first roll adjustment that is rotationally set on the axis and can slide axially
One end of cylinder and the first end face cam for being located at the axis shell one end, the first roll adjustment cylinder is convex equipped with second end face
Wheel, the other end of the first roll adjustment cylinder are rotationally connected on first movable pulley, the first end face cam and second
Edge cam abuts against.
2. cam-type bicycle speed-varying unit according to claim 1, which is characterized in that the driven pulley includes being socketed in
Second fast pulley of the wheel hub of the rear axle and with second fast pulley can not relatively rotate setting and can slide in an axial direction
The second dynamic movable pulley is equipped between the rear axle and the second movable pulley for driving second movable pulley to slide axially
Roll adjustment component.
3. cam-type bicycle speed-varying unit according to claim 2, which is characterized in that the roll adjustment component is elastic component,
One end of the elastic component is connected to the rear axle, and the other end is connected to second movable pulley.
4. cam-type bicycle speed-varying unit according to claim 2, which is characterized in that the roll adjustment component includes rotationally
It is set on the rear axle and the second roll adjustment cylinder that can be slid axially and the third edge cam being set on the rear axle,
One end of the second roll adjustment cylinder is equipped with the 4th edge cam, and the other end of the second roll adjustment cylinder is rotationally connected to described the
On two movable pulleies, the third edge cam and the 4th edge cam abut against.
5. cam-type bicycle speed-varying unit according to claim 2, which is characterized in that the roll adjustment component is ball spiral shell
The screw rod part of bar, the ball screw is set on the rear axle, and one end of the nut element of the ball screw rotationally abuts
On second movable pulley.
6. cam-type bicycle speed-varying unit according to claim 1, which is characterized in that the lateral wall of the first roll adjustment cylinder
It is equipped with the first roll adjustment driving lever.
7. cam-type bicycle speed-varying unit according to claim 4, which is characterized in that the lateral wall of the second roll adjustment cylinder
It is equipped with the second roll adjustment driving lever.
8. cam-type bicycle speed-varying unit according to claim 5, which is characterized in that the nut element of the ball screw
Lateral wall is equipped with third roll adjustment driving lever.
9. cam-type bicycle speed-varying unit according to claim 2, which is characterized in that the wheel of the driven pulley and rear axle
Unilateral bearing is equipped between hub.
10. cam-type bicycle speed-varying unit according to claim 1, which is characterized in that the first end face cam and
The cam face of biend cam is smooth surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499389.9A CN108583770A (en) | 2017-12-29 | 2017-12-29 | Cam-type bicycle speed-varying unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499389.9A CN108583770A (en) | 2017-12-29 | 2017-12-29 | Cam-type bicycle speed-varying unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108583770A true CN108583770A (en) | 2018-09-28 |
Family
ID=63633177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711499389.9A Pending CN108583770A (en) | 2017-12-29 | 2017-12-29 | Cam-type bicycle speed-varying unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108583770A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270908A (en) * | 2000-06-06 | 2000-10-25 | 黄昌友 | Automatic stepless speed-varying transmission mechanism for bicycle |
| CN1702350A (en) * | 2004-05-24 | 2005-11-30 | 袁媛 | V-belt stepless speed change device |
| CN103477120A (en) * | 2011-03-23 | 2013-12-25 | 丰田自动车株式会社 | Belt-type continuously variable transmission |
| CN105905229A (en) * | 2016-06-29 | 2016-08-31 | 麦志成 | Stepless speed changing bicycle |
| CN207809672U (en) * | 2017-12-29 | 2018-09-04 | 倍能科技（广州）有限公司 | Cam-type bicycle speed-varying unit |
-
2017
- 2017-12-29 CN CN201711499389.9A patent/CN108583770A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270908A (en) * | 2000-06-06 | 2000-10-25 | 黄昌友 | Automatic stepless speed-varying transmission mechanism for bicycle |
| CN1702350A (en) * | 2004-05-24 | 2005-11-30 | 袁媛 | V-belt stepless speed change device |
| CN103477120A (en) * | 2011-03-23 | 2013-12-25 | 丰田自动车株式会社 | Belt-type continuously variable transmission |
| CN105905229A (en) * | 2016-06-29 | 2016-08-31 | 麦志成 | Stepless speed changing bicycle |
| CN207809672U (en) * | 2017-12-29 | 2018-09-04 | 倍能科技（广州）有限公司 | Cam-type bicycle speed-varying unit |
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Address after: 510000 Room 303, Building A, No. 1 Nanxiang Branch Road, Huangpu District, Guangzhou City, Guangdong Province (office only) Applicant after: Baineng Technology (Guangzhou) Co., Ltd. Address before: 510000 Haizhu District, Guangzhou City, Guangdong Province, northwest side of the first floor of No. 1-3, No. 640 Tongfudong Road Applicant before: Baineng Technology (Guangzhou) Co., Ltd. |
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