CN2664991Y

CN2664991Y - Folding apparatus for folding bicycles

Info

Publication number: CN2664991Y
Application number: CN 200320129331
Authority: CN
Inventors: 徐达来
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-06
Filing date: 2003-12-06
Publication date: 2004-12-22
Anticipated expiration: 2013-12-06

Abstract

Disclosed is a folding device of a folding bicycle, relating to the folding bicycle technology field, which comprises a front frame, a back frame, a central shaft, a hinge shaft, a chain and a locking device for limiting the unfolding condition of the front frame and the back frame. A folding rocker arm with a hook is arranged at one side of the chain. When the front frame and the back frame are in unfolding condition, the hook of the folding rocker arm is positioned at the outer side of the lower side chain of the chain; when the front frame and the back frame are in folding condition, the upper and the lower side chain of the chain are both rolled on the hook of the folding rocker arm. Compared with the prior art, the problems of the folding of the chain driving device, and of the moving resistance and the noise to the chain generated when the front frame and the back frame are in operation are solved.

Description

The folding device of folding bicycle

Technical field

The utility model relates to the folding bicycle technical field, especially a kind of folding device of chain gear bicycle.

Background technology

Folding bicycle is pursued is the volume that as far as possible dwindles after the folding, also to take into account simultaneously launch the convenience of using the back and ride light and handy.In the prior art of chain gear folding bicycle, its folding device generally has two macrospecies foldable structure modes, and a kind of is the not folding frame mode of chain gearing; Another kind is the also folding frame mode of chain gearing.The former is because chain gearing is folding, therefore, determined after its folding at least the size of a direction can not less than sprocket shaft apart from and drive sprocket radius and rear wheel radius sum; The latter is as " folding bicycle " (Chinese patent: 96317825.3, the day for announcing is on December 24th, 1997) structure of being showed, the folding shaft of this folding mode is located between axis and the rear axle near axis one side and parallel with axis, during this bicycle folding, back framework rotates around this folding shaft, track rear is dwindled gradually, for preventing that chain from getting loose, the tightening device that two groups of support rollers of change-speed box are formed outside Rear Ends/Dropouts is equipped with approximate back, the support roller of this tightening device is engaged on the chain, though this structure can effectively be dwindled the length dimension of car load after the folding, but because the spring tension of tightening device when bicycle launches is excessive, chain is produced bigger resistance of motion and voice, the tightening device amplitude of fluctuation is too big when folding, spring tension is little, make chain cross pine and take off chain easily, and this apparatus structure complexity, easy to wear, install and maintenance difficult, manufacturing cost is higher.

Summary of the invention

The utility model provides a kind of folding device of folding bicycle, and it not only can solve the problem of chain gearing folding, and can solve the problem that chain is produced resistance of motion and voice when launching to use.

For achieving the above object, the scheme that the utility model adopts is: it includes front vehicle frame, back vehicle frame, axis, be located at the described front vehicle frame of hinge axis, chain and qualification between drive sprocket and the driven sprocket and these technical characterictics similar or identical with prior art of blocking device of back vehicle frame deployed condition, in addition, side at described chain is equipped with the folding rocking arm that has gib head, when being in deployed condition between described front vehicle frame and the back vehicle frame, the gib head of described folding rocking arm is positioned at the outside of the following side chain of described chain; When being in folded state between described front vehicle frame and the back vehicle frame, the last side chain of described chain and following side chain are all on the gib head of described folding rocking arm, this structure can make described front vehicle frame and back vehicle frame when folded state, the amplitude of fluctuation of described folding rocking arm is little, and when described front vehicle frame was in deployed condition with the back vehicle frame, the gib head of described folding rocking arm can break away from described chain again.

Above-mentioned folding rocking arm can be contained on the described front vehicle frame, also can be contained on the vehicle frame of back.Under described folding rocking arm was contained in situation on the described front vehicle frame, when described front vehicle frame and back vehicle frame were in deployed condition, described back vehicle frame had a briquetting to be pressed on the inclined-plane set on the described folding rocking arm; And under described folding rocking arm was contained in situation on the vehicle frame of described back, when described front vehicle frame and back vehicle frame were in deployed condition, described front vehicle frame had a briquetting to be pressed on the inclined-plane set on the described folding rocking arm.Both of these case all is to make the gib head of " 7 " font that folds rocking arm when described front vehicle frame is in deployed condition with the back vehicle frame, withdrawn in the chain plane of rotation by pressure by the inclined-plane that is provided with on the folding rocking arm, stretch out the rotation of the foot-operated crank of long obstruction to avoid it.Above-mentioned folding rocking arm also can be contained on the axis of described front vehicle frame.Above-mentioned blocking device can be made of with the parts that are provided with dog hole the clasp that is located at respectively on described front vehicle frame and the described back vehicle frame, also be connected with retracing spring on the described clasp, when described front vehicle frame was in deployed condition with the back vehicle frame, described clasp can collude in the described dog hole; Above-mentioned blocking device can also be to constitute by being located at pin that is equipped with on described front vehicle frame and the described back vehicle frame and the parts that are provided with pin-and-hole respectively, also is connected with retracing spring on the described pin.When described front vehicle frame was in deployed condition with the back vehicle frame, described pin can insert in the described pin-and-hole.

Owing to adopted such scheme the utility model compared with prior art to have following beneficial effect:

1, because at front vehicle frame and back vehicle frame when folding and launching, the chain that just is positioned at the upper and lower both sides of principal and subordinate's movable sprocket is folding and launch motion around the gib head of folding rocking arm simultaneously, do not need as prior art, to pass through Tension gear all the time with chain engages and tension chain.Therefore, the bicycle that adopts this device is when launching to use, and the gib head of folding rocking arm can break away from chain fully, allows chain keep suitable degree of tightness state, thereby can obtain the light and handy effect of riding.

2, since do not need as prior art by Tension gear all the time with chain engages and tension chain, therefore, can eliminate the transmission noise and the wearing and tearing that produce because of tension chain.

3, owing to need not need Tension gear as prior art, therefore, this structurally variable gets simply, reliably, and can effectively reduce manufacturing cost.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment under folded state.

Fig. 2 is the structural representation of latching device among the utility model embodiment.

The specific embodiment

The utility model is described in further detail below in conjunction with the accompanying drawing example:

Among Fig. 1, the embodiment shown in Figure 2, the folding device of this folding bicycle includes front vehicle frame 4, back vehicle frame 1, the hinge axis 2 that connects front vehicle frame 4 and back vehicle frame 1, be contained in axis 6, drive sprocket 7 on the front vehicle frame, be contained in driven sprocket 9 and ring chain 8 these the same as the prior art or similar structure members that are contained on drive sprocket 7 and the driven sprocket 9 on the vehicle frame 1 of back.The folding device of this folding bicycle also has the blocking device that limits front vehicle frame 4 and back vehicle frame 1 deployed condition, it is by being contained in the clasp 10 of back on the vehicle frame 1 by hinge, being contained in the spring 11 between back vehicle frame 1 and the clasp 10 and forming with the dog hole that the doughnut-shaped steel plate of front vehicle frame 4 riser upper weld togethers constitutes, when front vehicle frame 4 was in deployed condition with back vehicle frame 1, clasp 10 can collude in this dog hole.In addition, the folding rocking arm 3 that the side, the one end that are positioned at chain 8 have " 7 " font gib head is housed in the standpipe bottom of front vehicle frame 4, the middle part of folding rocking arm 3 is provided with an inclined-plane, when front vehicle frame 4 is in deployed condition with back vehicle frame 1, back vehicle frame 1 is provided with a briquetting and is pressed on this inclined-plane, makes folding rocking arm 3 backswing and produces elastic deformation and force its gib head to break away from the plane of rotation of the chain 8 and the chain 8 of withdrawing.Between folding rocking arm 3 and the front vehicle frame 4 tensioning spring 5 is housed, when being in deployed condition between front vehicle frame 4 and the back vehicle frame 1, the gib head of folding rocking arm 3 is positioned at the outside of the following side chain of chain 8; When being in folded state between front vehicle frame 4 and the back vehicle frame 1, the last side chain of chain 8 and following side chain are all on the gib head of folding rocking arm 3.When this structure can make front vehicle frame 4 and back vehicle frame 1 fold, the amplitude of fluctuation of folding rocking arm 3 was little, and when front vehicle frame 4 was in deployed condition with back vehicle frame 1, the gib head of folding rocking arm 3 can break away from chain 8 again.

The folding device of this folding bicycle in other embodiments, its folding rocking arm can be contained on the axis of bicycle.Its blocking device also can be to be made of with the parts that are provided with pin-and-hole the pin that is located at respectively on front vehicle frame and the back vehicle frame, is connected with retracing spring on the described pin, and when front vehicle frame was in deployed condition with the back vehicle frame, pin can insert in the pin-and-hole.

Claims

1, a kind of folding device of folding bicycle, it includes front vehicle frame, back vehicle frame, axis, is located at described front vehicle frame of hinge axis, chain and qualification and the described blocking device of vehicle frame deployed condition afterwards between drive sprocket and the driven sprocket, it is characterized in that: the side at described chain is equipped with the folding rocking arm that has gib head, when being in deployed condition between described front vehicle frame and the described back vehicle frame, the gib head of described folding rocking arm is positioned at the outside of the following side chain of described chain; When being in folded state between described front vehicle frame and the back vehicle frame, the last side chain of described chain and following side chain are all on the gib head of described folding rocking arm.

2, the folding device of folding bicycle according to claim 1, it is characterized in that: described folding rocking arm is contained on the described front vehicle frame, should be provided with the inclined-plane by folding rocking arm, when described front vehicle frame was in deployed condition with the back vehicle frame, described back vehicle frame had a briquetting to be pressed on the inclined-plane of described folding rocking arm.

3, the folding device of folding bicycle according to claim 1, it is characterized in that: described folding rocking arm is contained on the vehicle frame of described back, should be provided with the inclined-plane by folding rocking arm, when described front vehicle frame was in deployed condition with the back vehicle frame, described front vehicle frame had a briquetting to be pressed on the inclined-plane of described folding rocking arm.

4, the folding device of folding bicycle according to claim 1 is characterized in that: described folding rocking arm is contained on the described axis.

5, according to the folding device of claim 1,2,3 or 4 described folding bicycles, it is characterized in that: described blocking device is to be made of with the parts that are provided with dog hole the clasp that is located at respectively on described front vehicle frame and the described back vehicle frame, also is connected with retracing spring on the described clasp.

6, according to the folding device of claim 1,2,3 or 4 described folding bicycles, it is characterized in that: described blocking device is to be made of with the parts that are provided with pin-and-hole the pin that is located at respectively on described front vehicle frame and the described back vehicle frame, also is connected to retracing spring on the described pin.