CN201140773Y - Improved front speed changer structure - Google Patents
Improved front speed changer structure Download PDFInfo
- Publication number
- CN201140773Y CN201140773Y CNU200720178148XU CN200720178148U CN201140773Y CN 201140773 Y CN201140773 Y CN 201140773Y CN U200720178148X U CNU200720178148X U CN U200720178148XU CN 200720178148 U CN200720178148 U CN 200720178148U CN 201140773 Y CN201140773 Y CN 201140773Y
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- CN
- China
- Prior art keywords
- face
- chain sheet
- chain
- lead
- front derailleur
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- 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 - Lifetime
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Abstract
An improved front speed changer structure is provided. A body mainly comprises a base, a first connecting bar, a second connecting bar and a guiding chain unit, wherein one end of the first connecting bar is pivoted on the base, and the other end is pivoted on the guiding chain unit. One end of the second connecting bar is pivoted on the base, and the other end is pivoted on the guiding chain unit. The guiding chain unit is provided with an outer guiding chain sheet and an inner guiding chain sheet, wherein the two ends of the outer guiding chain sheet are connected with the inner guiding chain sheet to form a holding space for penetration. The outer guiding chain sheet is provided with a first end face, a second end face and a third end face, wherein the first end face is in a straight line with the forward direction and is perpendicular with the horizontal plane, the second end face is located on the front end of the outer guiding chain sheet, and the second end face is parallel with the first end face, and is much closer to the inner guiding chain sheet than the first end face, one end of the third end face is connected with the second end face, and the other end of the third end face is slanted towards the direction which is far away from the inner guiding chain sheet. Through the structure, the effects of auxiliary speed change, interference avoidance and rigidity strengthening can be realized.
Description
Technical field
The utility model relates to a kind of bicycle speed-varying unit, and it is better and structure is more firm, the improved Front Derailleur structure that result of use is better to relate in particular to a kind of rigidity.
Background technology
Existing Front Derailleur structure sees also No. 7081058 patent of the U.S., discloses a kind of bicycle Front Derailleur, and comprise: a base component forms and can be connected in cycle frame; One movable member has a leading section and a rearward end, forms a chain guide part that can move between a primary importance and a second place; One first connecting rod member, comprise the first pontes that is connected in this base component pivotly, and be connected in one second connecting bridge of this movable member pivotly around one first pivot axis, this first connecting rod member have one to front surface and to the rear surface, this first and second connecting bridge along this first connecting rod member extends to the rear surface to front surface and this for this; One second connecting rod member comprises the first pontes that is connected in this base component pivotly, and is connected in one second connecting bridge of this movable member pivotly around one second pivot axis; One biasing member, it is online to be set at this first pivotal axis, under normal conditions this movable member is biased into this primary importance with respect to this base component; When this Front Derailleur is installed in cycle frame, this biasing member be positioned at this first connecting rod member of extending along this first pontes of this first connecting rod member at least in part with respect to this movable member this to the place ahead of a section of front surface; This first pontes of this second connecting rod member comprises a pair of axially spaced installation component of the axial opposed end of an attachment assembly that is connected in this base component pivotly.
Existing structure provides the function of speed-change and gearshift of bicycle, and the rigidity of increase structure, reduce the stress and the distortion of each parts, but when chain in than the minor diameter fluted disc when driving than minor diameter sprocket wheel state, chain presents askew status, so exist the situation of severe interference between chain and the Front Derailleur, so not only cause the noise problem when trampling, more because interfere the abrasion problem that causes between chain, the Front Derailleur, in the course of time, the consume of chain and Front Derailleur causes the unstable of structure and destroys.
Moreover chain is when trampling, and chain tension is very powerful, when adding speed change, forces chain dislocation, causes Front Derailleur to bear high stress, and how the reinforced structure rigidity also is the problem of improvement that existing structure is desired most ardently.
The utility model content
Technical problem underlying to be solved in the utility model is, overcomes the above-mentioned defective that prior art exists, and a kind of improved Front Derailleur structure is provided, and it is better and structure is more firm, the advantage that result of use is better that it has rigidity.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of improved Front Derailleur structure is provided with a body, and this body comprises that mainly a pedestal, a first connecting rod, a second connecting rod and lead chain element; It is characterized in that this first connecting rod one end is to be articulated in pedestal, the other end is articulated in leads chain element; This second connecting rod one end is to be articulated in pedestal, and the other end is articulated in leads chain element; This is led chain element and is provided with outer leading and leads the chain sheet in chain sheet and one, should outer lead chain sheet two ends with in lead the chain sheet and be connected, and form an accommodation space that Gong wears, should outer lead the chain sheet and be provided with one first end face, one second end face and one the 3rd end face, this first end face is a straight line with working direction and horizontal by vertical, this second end face is to be located at the outer chain sheet front end of leading, this second end face parallel with first end face and than first end face near in lead the chain sheet, the 3rd end face one end and second end face join, and the 3rd end face other end is towards leading chain sheet direction away from interior; Reach auxiliary variable speed, avoid interfering and strengthening the effect of rigidity by said structure.
Aforesaid improved Front Derailleur structure, wherein the second end face length is 1 centimeter to 3 centimeters.
Aforesaid improved Front Derailleur structure, wherein the 3rd end face length is 2 centimeters to 5 centimeters.
Aforesaid improved Front Derailleur structure, it is led chain sheet rear end at home and abroad and is provided with one the 4th end face, and the 4th end face one end and one the 3rd end face join, and the 4th end face other end is to lead chain sheet direction inwardly.
Aforesaid improved Front Derailleur structure, it leads the chain sheet at home and abroad is aluminum alloy or carbon fiber material.
The utility model solves its technical matters also can adopt following technical scheme:
A kind of improved Front Derailleur structure is provided with a body, it is characterized in that, this body comprises leading outside one leads the chain sheet in chain sheet and one; Should outer lead the chain sheet and be provided with one first end face, one second end face and one the 3rd end face, this first end face is a straight line with working direction and horizontal by vertical, this second end face is to be located at the outer chain sheet front end of leading, this second end face be parallel with first end face and than first end face near in lead the chain sheet, the 3rd end face one end is to join with second end face, and the 3rd end face other end is towards leading chain sheet direction away from interior; Should in lead chain sheet two ends and be and lead the chain sheet outward and be connected, and form an accommodation space that Gong wears; In order to do profit, reach auxiliary variable speed, avoid interfering and strengthening the effect of rigidity by said structure.
Aforesaid improved Front Derailleur structure, wherein the second end face length is 1 centimeter to 3 centimeters.
Aforesaid improved Front Derailleur structure, wherein the 3rd end face length is 2 centimeters to 5 centimeters.
Aforesaid improved Front Derailleur structure, it is led chain sheet rear end at home and abroad and is provided with one the 4th end face, and the 4th end face one end and one the 3rd end face join, and the 4th end face other end is to lead chain sheet direction inwardly.
Aforesaid improved Front Derailleur structure, it leads the chain sheet at home and abroad is aluminum alloy or carbon fiber material.
By this second end face pushing and pressing chain, auxiliary chain is by being converted into than the minor diameter fluted disc than the major diameter fluted disc, and utilizes the section drop formation spatial structure of this first end face and second end face, can strengthen whole rigidity.
Moreover, when chain in than the minor diameter fluted disc when driving than minor diameter sprocket wheel state, chain presents crooked state, parallel by the crooked direction of the 3rd end face and chain, keep chain and the gap of leading the chain sheet outward, so, avoid producing constructive interference, so not only can reduce noise, also can overcome the abrasion problem of structure.
The beneficial effects of the utility model are that its rigidity is better and structure is more firm, the advantage that result of use is better.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the front view of the improved Front Derailleur structure of the utility model.
Fig. 2 is the scheme drawing of the utility model Front Derailleur, chain, fluted disc and sprocket wheel relativeness.
Fig. 3 is a schematic perspective view of the present utility model.
Fig. 4 is the generalized section of AB line segment shown in Figure 3.
The number in the figure explanation:
10---the seat pipe
20---chain
31---fluted disc
311---than the major diameter fluted disc
312---than the minor diameter fluted disc
32---sprocket wheel
321---than large diameter sprocket
322---than the minor diameter sprocket wheel
323---the minimum diameter sprocket wheel
40---body
41---pedestal
42---first connecting rod
43---second connecting rod
44---lead chain element
441---lead the chain sheet outward
442---in lead the chain sheet
4410---first end face
4411---second end face
4412---the 3rd end face
4413---the 4th end face
45---accommodation space
The specific embodiment
The utility model relates to a kind of improved Front Derailleur structure, please refer to shown in Figure 1, its body 40 is to be fixedly arranged on pipe 10 belows, this body 40 wears a chain 20 in wherein, be converted to than major diameter fluted disc 311 or than minor diameter fluted disc 312 with control chain 20, please refer to shown in Figure 2, when driving, by trampling rotation fluted disc 31, drive to sprocket wheel 32 via chain 20, and then the drive bicycle advances, the direction of advancing with fluted disc 31 drive chains 20 is the place ahead, otherwise be the rear, when advancing at utmost speed or low speed when climbing, can be by Front Derailleur and Rear Derailleur (not shown), adjust the position of chain 20 respectively in fluted disc 31 or sprocket wheel 32, utilization than major diameter fluted disc 311 or than minor diameter fluted disc 312 with than large diameter sprocket 321 or than the different ratios of number of teeth of minor diameter sprocket wheel 322 collocation, reach high speed or labour-saving effect, when chain 20 is positioned at than minor diameter fluted disc 312 with than the state action of minor diameter sprocket wheel 322 time, chain 20 presents a crooked state, but not the maintenance linear state, existing design can't overcome the interference of this state generation and the problem of noise, also is creation emphasis of the present utility model.
The improved Front Derailleur structure of the utility model please refer to Fig. 3 and shown in Figure 4, and this body 40 comprises that a pedestal 41, a first connecting rod 42, a second connecting rod 43 and lead chain element 44, wherein:
This pedestal 41 is to manage 10 belows in order to fixed body 40 in seat;
These first connecting rod 42 1 ends are to be articulated in pedestal 41, and the other end is articulated in leads chain element 44;
These second connecting rod 43 1 ends are articulated in pedestal 41, and the other end is articulated in leads chain element 44;
This is led chain element 44 and is provided with outer leading and leads chain sheet 442 in chain sheet 441 and one, should outer lead chain sheet 441 two ends with in lead chain sheet 442 and be connected, form an accommodation space 45 that wears for chain 20, should outer lead chain sheet 441 and be provided with one first end face 4410, one second end face 4411, one the 3rd end face 4412 and one the 4th end face 4413, this first end face 4410 is parallel with chain 20 when chain 20 linear states, this second end face 4411 is to be located at outer chain sheet 441 front ends of leading, this second end face 4411 be parallel with first end face 4410 and than first end face 4410 near in lead chain sheet 442, the 3rd end face 4,412 one ends are to join with second end face 4411, the 3rd end face 4412 other ends are towards leading chain sheet 442 directions away from interior, the 4th end face 4413 and the 3rd end face 4412 join, the other end is led chain sheet 442 directions inwardly, should outer lead chain sheet 441 is that aluminum alloy or carbon fiber material are made into integration to increase bulk strength, moreover, utilize this second end face 4411 with respect to the state of first end face 4410 for depression, form spatial structure, more can strengthen whole rigidity;
By this pedestal 41, first connecting rod 42, second connecting rod 43 and lead chain element 44 and form four-bar linkages, this leads chain element 44 can do suitable change in displacement, when the speed change lower gear, should outer lead second end face, 441 contact chain 20 and pushing and pressing on the chain sheet 441, in general chain 20 pitches are about about 1 centimeter, and chain 20 is the combination of pin link plate and inner plate, can guarantee that with the distance of 3 times of pitches second end face 441 contacts with pin link plate, so it is good that these second end face, 441 length are 1 centimeter to 3 centimeters, the 3rd end face 4412 chains 20 of correcting simultaneously are toward interior direction, chain 20 is smoothly on being converted to than minor diameter fluted disc 312 than major diameter fluted disc 311, when chain 20 during in the state of minimum diameter fluted disc 312 and minimum diameter sprocket wheel 323, chain 20 is maximum crooked state, the 3rd end face 4412 is parallel with chain 20 maximum skew angles, interfere to keep the gap to be unlikely to produce, avoid the problem of structure abrasion, but the 3rd end face 4412 is not unrestricted extension, must keep certain length, with 2 centimeters to 5 centimeters be good, produce collision with crank or ankle and cause danger to avoid the outer chain sheet 441 of leading.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (10)
1, a kind of improved Front Derailleur structure is provided with a body, and this body comprises that mainly a pedestal, a first connecting rod, a second connecting rod and lead chain element; It is characterized in that,
This first connecting rod one end is to be articulated in pedestal, and the other end is articulated in leads chain element;
This second connecting rod one end is to be articulated in pedestal, and the other end is articulated in leads chain element;
This is led chain element and is provided with outer leading and leads the chain sheet in chain sheet and one, should outer lead chain sheet two ends with in lead the chain sheet and be connected, and form an accommodation space that Gong wears, should outer lead the chain sheet and be provided with one first end face, one second end face and one the 3rd end face, this first end face is a straight line with working direction and horizontal by vertical, this second end face is to be located at the outer chain sheet front end of leading, this second end face parallel with first end face and than first end face near in lead the chain sheet, the 3rd end face one end and second end face join, and the 3rd end face other end is towards leading chain sheet direction away from interior.
2, improved Front Derailleur structure according to claim 1 is characterized in that the described second end face length is 1 centimeter to 3 centimeters.
3, improved Front Derailleur structure according to claim 1 is characterized in that described the 3rd end face length is 2 centimeters to 5 centimeters.
4, improved Front Derailleur structure according to claim 1 is characterized in that describedly outer lead chain sheet rear end and being provided with one the 4th end face, and the 4th end face one end and one the 3rd end face join, and the 4th end face other end is to lead the inclination of chain sheet direction inwardly.
5, improved Front Derailleur structure according to claim 1 is characterized in that described outer to lead the chain sheet be aluminum alloy or carbon fiber material.
6, a kind of improved Front Derailleur structure is provided with a body, it is characterized in that, this body comprises leading outside one leads the chain sheet in chain sheet and one;
Should outer lead the chain sheet and be provided with one first end face, one second end face and one the 3rd end face, this first end face is to be a straight line with working direction and horizontal by vertical, this second end face is to be located at the outer chain sheet front end of leading, this second end face be parallel with first end face and than first end face near in lead the chain sheet, the 3rd end face one end is to join with second end face, and the 3rd end face other end is towards leading chain sheet direction away from interior;
Should in lead chain sheet two ends and be and lead the chain sheet outward and be connected, and form an accommodation space that Gong wears.
7, improved Front Derailleur structure according to claim 6 is characterized in that the described second end face length is 1 centimeter to 3 centimeters.
8, improved Front Derailleur structure according to claim 6 is characterized in that described the 3rd end face length is 2 centimeters to 5 centimeters.
9, improved Front Derailleur structure according to claim 6 is characterized in that describedly outer lead chain sheet rear end and being provided with one the 4th end face, and the 4th end face one end and one the 3rd end face join, and the 4th end face other end is to lead the inclination of chain sheet direction inwardly.
10, improved Front Derailleur structure according to claim 6 is characterized in that described outer to lead the chain sheet be aluminum alloy or carbon fiber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720178148XU CN201140773Y (en) | 2007-10-11 | 2007-10-11 | Improved front speed changer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720178148XU CN201140773Y (en) | 2007-10-11 | 2007-10-11 | Improved front speed changer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201140773Y true CN201140773Y (en) | 2008-10-29 |
Family
ID=40068487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720178148XU Expired - Lifetime CN201140773Y (en) | 2007-10-11 | 2007-10-11 | Improved front speed changer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201140773Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107215427A (en) * | 2016-03-22 | 2017-09-29 | 株式会社岛野 | Bicycle Front Derailleur with Mounting Bracket |
-
2007
- 2007-10-11 CN CNU200720178148XU patent/CN201140773Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107215427A (en) * | 2016-03-22 | 2017-09-29 | 株式会社岛野 | Bicycle Front Derailleur with Mounting Bracket |
| CN107215427B (en) * | 2016-03-22 | 2020-02-14 | 株式会社岛野 | Bicycle front derailleur with mounting bracket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081029 |
|
| CX01 | Expiry of patent term |