CN2411953Y - Whole chain guard of chain speed changed bicycle - Google Patents
Whole chain guard of chain speed changed bicycle Download PDFInfo
- Publication number
- CN2411953Y CN2411953Y CN 00216705 CN00216705U CN2411953Y CN 2411953 Y CN2411953 Y CN 2411953Y CN 00216705 CN00216705 CN 00216705 CN 00216705 U CN00216705 U CN 00216705U CN 2411953 Y CN2411953 Y CN 2411953Y
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- China
- Prior art keywords
- chain
- flywheel
- cover body
- cover
- whole
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Abstract
The utility model relates to a whole chain guard of a chain speed changed bicycle, which comprises a guard body (3), a chain wheel round covering plate (9), a flywheel lower box cover (1) and an installing clamping plate. The utility model is characterized in that a chain tensioning device (5) and a shifting speed changing device (2) are arranged in the guard body of the whole chain guard; the whole chain guard forms a whole sealed guard body capable of enveloping a chain (4), a chain wheel (7), a flywheel (1), the speed changing device and the chain tensioning device. The utility model overcomes many disadvantages of the existing speed changed bicycles, and therefore, the bicycle has the advantages of small transmitting friction resistance, long service life, easy ride and flexible and convenient speed change. The utility model can effectively prevent muddy water, dust from splashing into the flywheel, the chain and a driving mechanism of the chain wheel, reduce driving part abrasion, and avoid phenomena of clamping trouser corners and skirt corners and contacting oil in riding by people. Compared with the existing whole chain guard of an ordinary bicycle without changing speed, the weight and cost increase slightly.
Description
The utility model relates to the variable speed bicycle chain guard, particularly discloses a kind of chain variable speed bicycle whole chain cover.
For a long time, the importance of bicycle chain, essentiality become as everyone knows, and along with science and technology development, bicycle develops into variable speed bicycle, and variable speed bicycle has become the vehicle that people like, and its preceence also is well-known.But existing variable speed bicycle because the whole chain cover problem is unresolved, causes the variable speed bicycle sprocket chain strip transmission mechanism plaster foul that bonds easily, and mechanism's resistance and abrasion factor are big, and people use the shortcoming of easy set-off trousers, skirt.There are some contrivers also just to notice this problem, begin to develop the variable speed bicycle chain guard, for example patent: 92214008.1 1 kinds of outer variable speed bicycle chain guards; 91228368.8 variable speed bicycle chain guard; 92219850.0 variable speed bicycle chain guard, 93206784.0 the general chain guard of variable speed bicycle, they come down to a kind of half chain guard, sprocket wheel, chain, flywheel all can not be contained, therefore though can play the partial function effect of chain guard, but silt, dust muddy water still will enter flywheel, chain drive during the bicycle operation; Patent 94227366.4 variable speed bicycle whole chain covers, though be the whole chain cover form, because the bicycle shift shift fork moves the position and still adopts prior art, make chain be covered with boss step and breach, leak tightness is bad, and muddy water, dust also can be splashed in chain and the flywheel and go, and influence service life.The shelves number of existing in addition variable speed bicycle speed change is generally 10 speed (5 flywheels, 2 sprocket wheels), 12 speed (6 flywheels, 2 sprocket wheels), even 15 speed (5 flywheels, 3 sprocket wheels), yet actual the use do not need so many gear number, according to operating needs, in fact only use 2-3 shelves speed change, remaining gear has become a kind of ornaments, there is not great Practical significance, increase weight and the manufacturing cost and the price of car, the speed change gear is many in addition, the thickness of freewheel sprockets number stack is also very big, very unfavorable to transmission, quickened flywheel, the wearing and tearing of sprocket wheel, and increased the transmission frictional resistance.
The purpose of this utility model discloses a kind of chain variable speed bicycle whole chain cover, overcome the shortcoming of existing variable speed bicycle, thereby bicycle transmission frictional resistance of the present utility model is little, long service life, it is easy and convenient to ride, it organically combines transmission system and chain guard harmoniously, makes speed change flexible, and car weight and manufacturing cost increase seldom.
The utility model is achieved in that the whole chain cover of common bicycle is divided into behind cover body, sprocket wheel closing disk, the flywheel lid and clamping plate are installed, and the utility model is characterized in that being provided with in the whole chain cover cover body chain stretching device (5) and fork shift transmission system (2).Whole chain cover forms the fully enclosed cover body that can contain chain (4), sprocket wheel (7) and flywheel (1) and transmission system.Described fork shift transmission system (2) is actually the part of cover body, is arranged on the chain guard bottom and inlays in the cover body, before the flywheel lower casing.Device comprises chute (12), group frame (13), spring (14), connects pendulum plate (15) and crossbeam (16), crossbeam and chute are fixed on the cover body two side, dial frame (13) and be connected on the connection pendulum plate, connect the pendulum plate other end and be connected on the crossbeam, can swing by bearing pin, dial frame and have pin, pin is inserted in the chute, and an end of spring (14) leans against on the cover body wall, and the other end is near dialling frame, the spring string is enclosed within on the bearing pin, and its elastic force will be dialled the frame bullet all the time on one side; Flexible axle is outside cover body, its in-core steel wire one end is connected with group frame, the other end links to each other with bar handle (8) on being fixed on handlebar, the chain of flywheel lower edge (4) passes dials frame, handle control handle like this, by flexible axle spring and group frame, just chain can be positioned on the required gear shift flywheel, reach the purpose of fork shift speed change.Described chain stretching device (5) is arranged in the cavity of resorption cover body behind the sprocket wheel closing disk, because fixed shelves are on the number of teeth and diameter of different flywheels during flywheel multi-speed, therefore the chain Len req also changes to some extent, chain stretching device be exactly when being adapted to various gear all the time with chain tension on the degree that the bicycle running is fit to.Chain stretching device comprises body (18), telescopic fork (17), compression spring (19), driving wheel (20), fixed wheel (21) and fix screw (23).The width of body (18) is slightly less than width between the cover body two side, be convenient to stablize installing and locating like this, telescopic fork is inserted in the two interior flat holes of body cavity, jaw stretches out originally external, a driving wheel (20) is installed in the end, form the square column type hole in the body between space and the telescopic fork, settle a compression spring (19) in it.A T slot (22) that vertically connects body is arranged at the body bottom, lays fix screw in it, and body is positioned on the cover body.There is tommy at nearly two ends, prevent that screw from skidding off T slot.Because the effect of compression spring in the body, the driving wheel of telescopic fork termination is in tensioning state with chain all the time under various speed change situations, and gear shift flywheel described in the utility model generally is to adopt the flywheel of 3 different numbers of teeth and diameter to be formed by stacking.Be provided with movable window (10) in the cover body outside, be convenient to install chain.
The utility model is described in further detail below by Figure of description.
Accompanying drawing 1 is the utility model speed change transmission diagram.
Accompanying drawing 2 is fork shift transmission system birds-eye vieies.
Accompanying drawing 3 is fork shift transmission system lateral plans.
Accompanying drawing 4 is fork shift transmission system elevation cross-sectional view.
Accompanying drawing 5 is whole chain cover cover body planform scheme drawings.
Accompanying drawing 6 is chain stretching device structural representations.
Accompanying drawing 7 is the side-looking constructional drawing of accompanying drawing 6.
Accompanying drawing 8 is body generalized sections in the chain stretching device.
Accompanying drawing 9 is A-A section-drawings of accompanying drawing 8.
Labeled elements is (1) flywheel in the accompanying drawing 1, (2) fork shift transmission system, (3) cover body, (4) chain, (5) chain stretching device, (6) flexible axle, (7) sprocket wheel, (8) bar handle, (18) driving wheel, (20) fixed wheel, (3) cover body in the accompanying drawing 2, (6) flexible axle, (8) bar handle, (12) chute, (13) dial frame, (14) spring, (4) chain in the accompanying drawing 3, (12) chute, (13) fork shift, (14) spring, (15) connect the pendulum plate, (16) connect crossbeam, (3) cover body in the accompanying drawing 4, (13) dial frame, (15) connect pendulum plate, (2) fork shift transmission system in the accompanying drawing 5, (3) cover body, (9) sprocket wheel closing disk, (10) movable window, (11) flywheel lower casing, in the accompanying drawing 6, (3) cover body, (17) telescopic fork, (18) body, (19) compression spring, (20) driving wheel, (20) driving wheel in the accompanying drawing 7, (22) T slot ditch among Fig. 8, (24) banking pin hole among Fig. 9.
Embodiment: 1～9 make the utility model with reference to the accompanying drawings, selecting variable speed bicycle is three speed, the axis hinge wheel is single, flywheel is the stack flywheel of three different numbers of teeth and diameter, there is third gear the fork shift position of fork shift transmission system, and chain stretching device body (16) is long to be made as 85mm, and height is 45mm, wide is 19mm, the bulk material engineering plastics.Width is 25mm between the whole chain cover two side, fork shift transmission system (2) is arranged in the preceding cover body breach of whole chain cover flywheel lower casing, it is independently parts, be again the part of cover body simultaneously, it is fixed on the vehicle frame triangle connecting panel with screw, because outside cover body is provided with movable window (10), cooperate the chain wheel cover plate hole, it is more convenient that the adjusting chain is installed.
The utility model overcomes the shortcomings of existing multi-speed bicycle, in few increase car weight and production Under the cost, make bicycle transmission frictional resistance little, long service life is ridden easily, and speed change is the side flexibly Just, can prevent effectively that muddy water, dust are splashed in flywheel, the chain drive, reduce the driving member wearing and tearing, People avoid by bike trousers corner, skirt angle and rub oily phenomenon.
Claims (5)
1. chain variable speed bicycle whole chain cover, comprise behind cover body (3), sprocket wheel closing disk (9), the flywheel lid (11) and clamping plate are installed, it is characterized in that being provided with in the whole chain cover cover body chain stretching device (5) and fork shift transmission system (2), whole chain cover forms the fully enclosed cover body that can contain chain (4), sprocket wheel (7) and flywheel (1) and transmission system.
2. chain variable speed bicycle whole chain cover according to claim 1, it is characterized in that described fork shift transmission system (2) is arranged on the bottom and inlays in the cover body, before the flywheel lower casing, comprise chute (12), dial frame (13), spring (14), connect pendulum plate (15) and crossbeam (16), crossbeam and chute two ends are fixed on the cover body two side, dialling frame (13) is connected on the connection pendulum plate, connecting the pendulum plate other end is connected on the crossbeam by bearing pin, can swing, dial the frame lower end and be connected with pin, pin is inserted in the chute, one end of spring (14) leans against on the cover body wall, the other end is near dialling frame, and the spring string is enclosed within on the bearing pin, relies on elasticity will dial the frame bullet all the time on one side, flexible axle is outside cover body, its in-core steel wire one end with dial frame and be connected, the other end links to each other with bar handle (8) on being fixed on handlebar, the chain of flywheel lower edge (4) passes group frame.
3. chain variable speed bicycle whole chain cover according to claim 1, it is characterized in that in the cavity of resorption cover body after described chain stretching device (5) is arranged on the sprocket wheel closing disk, comprise body (18), telescopic fork (17), compression spring (19), driving wheel (20), fixed wheel (21) and fix screw (23), the width of body (18) is slightly less than width between the cover body two side, telescopic fork is inserted in the body cavity, and in two flat holes, stretch out, stretch out the body external end head driving wheel (20) is installed, form the square column type hole in the body and between the telescopic fork, settle a compression spring (19) in the hole, a T slot (22) that vertically connects body is arranged at the body bottom, fix screw is placed in the T slot, fastening nut can be fixed in body on the cover body, and there is position-limitting pin at two ends.
4. chain variable speed bicycle whole chain cover according to claim 1 is characterized in that described flywheel is that flywheel by three different numbers of teeth and diameter is formed by stacking.
5. chain variable speed bicycle whole chain cover according to claim 1 is characterized in that being provided with movable window (10) at installation chain stretching device cover body outside mask wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00216705 CN2411953Y (en) | 2000-03-03 | 2000-03-03 | Whole chain guard of chain speed changed bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00216705 CN2411953Y (en) | 2000-03-03 | 2000-03-03 | Whole chain guard of chain speed changed bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2411953Y true CN2411953Y (en) | 2000-12-27 |
Family
ID=33582409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00216705 Expired - Fee Related CN2411953Y (en) | 2000-03-03 | 2000-03-03 | Whole chain guard of chain speed changed bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2411953Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1036247C2 (en) * | 2008-11-27 | 2010-05-28 | Johan Hajo Hoekstra | SWITCHING SYSTEM FOR A LOW-WHEEL AND WHEEL-WHEEL EQUIPPED WITH SUCH A SWITCHING SYSTEM |
-
2000
- 2000-03-03 CN CN 00216705 patent/CN2411953Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1036247C2 (en) * | 2008-11-27 | 2010-05-28 | Johan Hajo Hoekstra | SWITCHING SYSTEM FOR A LOW-WHEEL AND WHEEL-WHEEL EQUIPPED WITH SUCH A SWITCHING SYSTEM |
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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 |