CN2222121Y - Bicycle chain tension aid - Google Patents

Abstract

The utility model relates to a bicycle chain tension aid. In the utility model, a tension aid which can control and adjust the tension of a chain is arranged below a cross bar arranged between a left rear fork and a right rear fork of a cycle; the tension aid is mainly extended with a tension plate, one end edge of the tension plate is penetrated with a tension wheel, and the other end edge of the tension plate forms a tension mechanism by a spring; the tension wheel is arranged below the chain and abuts the chian from bottom to top, and the tension mechanism arranged on the other end of the tension plate makes the tension wheel adjust and control the tension of the chain to remove the phenomenon of loosening or swing caused by road bumpiness.

Description

Cycle chain tension force assistive device

The utility model relates to a kind of cycle chain tensioning device, and is especially a kind of auxilliary in tensioning device, adjusts the tension force assistive device of chain tension with may command.

Bicycle is one of main vehicle, and with development of science and technology and transition of age, the direction of bicycle development also is transferred in the required category of outdoor activity by the initial vehicle, on the higher vehicle of promptly nature of leisure such as car or mountain bike of being partial to climb the mountain more, but because the design of this kind bicycle mainly is can ride for rugged ground-surface on the mountain to sail, so to the shatter-proof and anti-performance requriements that jolts also than Regular Bicycle height.Taking a broad view of the tension control system of Regular Bicycle chain, all is that a chain tension adjuster is set on Rear Derailleur, because of the different different chain degrees of tightness that produced of the number of teeth, avoids crossing pine because of chain and produces the phenomenon that chain gets loose when adjusting speed change with this.But the above-mentioned chain tension adjuster of carrying, owing to need to cooperate various speed changing effect, so setting of its tension force size, just needing is situated between fixes on its intermediate value, and when being applied on the vehicle such as mountain-climbing car etc. in this way, the bigger variation and the ground-surface thereof that must cause this tensioning device can't withstand the number of teeth jolt, and then cause and travel or the getting loose or whipping of chain during speed change.So in view of this, someone just designs a kind of chain tension assistive device, as shown in Figure 5, it mainly is to be equiped with a chain assistive device 80 below the Chain stay 70 of bicycle, wherein this chain assistive device 80 fixedly installs a wheel body, and this wheel body can lay out the chain 73 of bicycle from sprocket wheel 71 after, earlier by behind the tight pulley of this chain assistive device 80, again in going into change-speed box 72, thus, the chain assistive device 80 that is added between sprocket wheel 71 and the change-speed box 72 can up be strained chain 73, and this chain 73 can often be remained on the tangent line of sprocket wheel 71 with tight state when transmission.

Above mentioned cycle chain tension force assistive device appear to the problem that can solve its bicycle tension force deficiency, but owing to be to adopt the mode of tight pulley to be provided with, this kind set-up mode may not have any problem at short notice and produce, but if through using for a long time, its chain must produce the phenomenon (this is the characteristic of chain when using) of elongation, then can cause chain loosening and come off equally.

Main purpose of the present utility model is to provide a kind of cycle chain tension force assistive device, and it and tensioning device are worked together, can adjust chain tension under the substantially constant state of value, make transmission the best.

To achieve these goals, the technical solution of the utility model is to provide a kind of cycle chain tension force assistive device, wherein is provided with a straining pulley that can prop up chain, and its feature is:

This straining pulley is installed in an ora terminalis side of drag board, and on another ora terminalis of this drag board, inlay and be provided with a lining, wherein an end of this lining side that protrudes from drag board forms a flange, and gum cover is set respectively in regular turn outside this flange, spring, cover cover, packing ring and bolt, its medi-spring is that chimeric being positioned at covers in the cover, this covers cover and then is linked in the gum cover outside, and make the top that end props up abutting end of supporting that covers cover, the spigot that its medi-spring one end stretches out then is located in the knock hole of gum cover and drag board, the distolateral registration mast that is provided with in addition of this lining, wherein this registration mast one end is a fixed end, this fixed end is to be connected pedestal and to be fixed in the stepped hole of pedestal, this pedestal top one side then is provided with a positioning groove and connects oblong aperture at positioning groove, the other end of this registration mast then is an abutting end, and the end face of this abutting end is provided with screw;

Be plugged in the combined hole of lining with abutting end with support bonded assembly registration mast, overlap arranged outside one bolt and a packing ring other covering of side of drag board, this bolt passes packing ring respectively, covers cover, spring, gum cover and with the abutting end screwhole spiro bonding that is plugged in the lining, support is installed in the cross bar side between back vent under the bicycle, and straining pulley stretches out below chain.

Aforesaid cycle chain tension force assistive device, its feature is: pedestal can be the plate that is coupling, and with the positioning end of registration mast be coupling the plate Joint;

This sleeve-board that is coupling is located on the five-way pipe, and is arranged on down between back vent and the sprocket wheel, and drag board and straining pulley stretched is located at the chain below and upwards supports.

The advantage of the utility model cycle chain tension force assistive device is owing to be provided with straining pulley, it props up chain from lower to upper, make chain tightens, and drag board is held the setting of tension mechanism in addition, can make the suitably tension force of this chain of adjusting control of straining pulley, and chain can not come off because of tired lax causing, can not produce a contrary effect because of chain is too tight yet, be certain value because of the size of the spring force in the tension mechanism again, can make chain keep the tension force of certain value for a long time, make the driving efficiency of chain remain on best state.

Accompanying drawing below in conjunction with two embodiment further can clearly demonstrate the purpose of this utility model and feature by this embodiment.

Fig. 1 is the perspective exploded view of the structure of first embodiment;

Fig. 2 is the enforcement view of first embodiment;

Fig. 3 is the generalized section of the tension mechanism of first embodiment;

Fig. 4 is the enforcement view of second embodiment; And

Fig. 5 is that the chain tension assistive device of prior art is implemented view.

The utility model is a kind of cycle chain tension force assistive device, Fig. 1 is the perspective exploded view of the utility model cycle chain tension force assistant structure, wherein mainly be to be provided with a drag board 10, one end of this drag board 10 is provided with a through hole 11, wherein the outside of through hole 11 is sequentially provided with a pad 112, one straining pulley 113 and an end are provided with the wheel bar 115 of screw 116, wherein taking turns bar 115 is to be plugged in the perforation 114 of straining pulley 113, pass the through hole 11 of drag board 10 more respectively from the side in addition of drag board 10 with a screw 111, pad 112, thereby be screwed with the screw 116 of wheel bar 115 in the straining pulley 113, thereby straining pulley 113 spiral shells are solid on drag board 10, form the fixed sturcture of a straining pulley 113 with this.

In addition, on the other end of the utility model drag board 10, inlay and be provided with a lining 13, wherein an end of this lining 13 is to protrude from a side of drag board 10 and form a flange, and gum cover 20 is set respectively in regular turn outside this flange, spring 21, cover cover 22, packing ring 23 and bolt 24, its medi-spring 21 is that chimeric being positioned at covers in the cover 22, to cover cover 22 again and be linked in gum cover 20 outsides, and make the top that end 222 props up abutting end 42 of supporting that covers cover 22, the spigot 211 that its medi-spring 21 1 ends stretch out then is to be arranged in the knock hole 202 of gum cover 20, again gum cover 20 is set on the flange of lining 13, spigot 211 with spring 21 is plugged in the knock hole 12 of drag board 10 simultaneously, makes like this to cover cover 22, spring 21 and gum cover 20 are embedded together on the flange of lining 13; In addition, the side in addition of these drag board 10 linings 13, be provided with a registration mast 40, wherein these registration mast 40 1 ends are a fixed end 41, this fixed end 41 is connected in pedestal 30 and is fixed in the stepped hole 33 of pedestal 30, this pedestal 30 tops one side then is provided with a positioning groove 31, and connects the oblong aperture 32 at positioning groove 31; The other end of this registration mast 40 in addition, it then is an abutting end 42 and end face of this abutting end 42 is provided with screw 421, can will be plugged in the conjugate foramen 131 of lining 13 by abutting end 42 with pedestal 30 bonded assembly registration masts 40 with this, again by drag board 10 in addition a bolt 24 of side settings pass packing ring 23 respectively, cover cover 22, spring 21, gum cover 20 and screw togather with abutting end 42 screws 421 that are plugged in the lining 13, so just each member is installed on the drag board 10, and forms a complete cycle chain tension force assistive device.

As shown in Figure 2, it is the enforcement view of the utility model cycle chain tension force assistive device, wherein be equipped with two Chain stays 70 between Regular Bicycle sprocket wheel 71 and the change-speed box 72, this Chain stay 70 is by sprocket wheel 71 1 sides, then can be horizontally set with a cross bar 74, the utility model cycle chain tension force assistive device then is arranged on the positioning groove on the pedestal 30 31 cross bar 74 sides, wear screw with the oblong aperture on the pedestal 30 32 again, with whole sealed being fixed on the cross bar 74 of the utility model cycle chain tension force assistive device; Such setting can make the straining pulley 113 on the drag board 10 stretch out below chain 73, and chain 73 is propped up from bottom to top, and it is one suitable tight that chain 73 is formed; In addition the utility model cycle chain tension force assistive device also may command straining pulley 113 along with the elasticity of chain 73, and make a suitable tension adjustment, because of covering the size of overlapping 22 inner springs, 21 strength are fixed values, so when chain 73 too tight and when exceeding the definite value of spring 21, its spring 21 can be subjected to the influence of chain 73 tension force and drag board 10 is strutted state to equalization of strain downwards, thereby makes straining pulley 113 can not produce compressing to chain 73; But as chain 73 when pine too, 21 on its spring can drive drag board 10, straining pulley 113 is made progress ejection and makes chain 73 formation tight, and tension force is stopped after forming balance, the tension adjustment that spring 21 drives straining pulley 113 can make chain 73 remain on certain tight state, makes the driving efficiency of chain remain on best state.

Again as shown in Figure 3, it is the generalized section of the utility model cycle chain tension force assistive device tension mechanism, wherein the utility model cycle chain tension force assistive device is when assembling, one end spigot 211 of tension mechanism inner spring 21 is to be plugged on the drag board 10, the end in addition of spring 21 then is plugged in and covers on the cover 22, in addition this to cover cover 22 be with bolt 24 screw 421 lockings with abutting end 42, and make top 222 and abutting end hold out against state for 42 one-tenth; Such setting, can make the utility model cycle chain tension force assistive device when implementing, when its straining pulley 113 (as shown in Figure 1, 2) supports drag board 10 downwards in case be subjected to the tension force of chain 73, drag board 10 can drive the spigot 211 of spring 21, and then affect spring 21, and but, the other end of spring 21 covers 22 li in cover because being plugged in, fixed by bolt 24 and cover cover 22, so spring 21 is reversed, makes drag board 10 form the degree of tightness that a tension force comes the adjusting control chain.

See also Fig. 4, it is another preferred embodiment of the utility model cycle chain tension force assistive device, wherein the pedestal 30 of the utility model cycle chain tension force assistive device is also replaceable is the plate 101 that is coupling, and with the fixed end 41 of registration mast 40 and plate 101 Joints that are coupling, and this plate 101 that is coupling is sheathed on five-way pipe 75, be arranged between Chain stay 70 and the sprocket wheel 73, and equally drag board 10 and straining pulley 113 are stretched and be located at chain 73 belows and upwards support, make the same tension force that keep certain values of chain 73, and can be too not tight or get loose.

Claims (2)

1. cycle chain tension force assistive device wherein is provided with a straining pulley that can prop up chain, it is characterized in that:

This straining pulley is a side that is installed in the drag board ora terminalis, and on another ora terminalis of this drag board, inlay and be provided with a lining, wherein an end of this lining side that protrudes from drag board forms a flange, and gum cover is set respectively in regular turn outside this flange, spring, cover cover, packing ring and bolt, its medi-spring is that chimeric being positioned at covers in the cover, this covers cover and then is linked in the gum cover outside, and make the top that end props up abutting end of supporting that covers cover, the spigot that its medi-spring one end stretches out then is located in the knock hole of gum cover and drag board, the distolateral registration mast that then is provided with in addition of this lining, wherein this registration mast one end is a fixed end, this fixed end is to be connected pedestal and to be fixed in the stepped hole of pedestal, this pedestal top one side then is provided with a positioning groove and connects oblong aperture at positioning groove, the other end of this registration mast then is an abutting end, and the end face of this abutting end is provided with screw;

With support bonded assembly registration mast is to be plugged in the combined hole of lining with abutting end, overlap arranged outside one bolt and a packing ring other covering of side of drag board, this bolt passes packing ring respectively, covers cover, spring, gum cover and with the abutting end screwhole spiro bonding that is plugged in the lining, support is installed in the cross bar side between back vent under the bicycle, and straining pulley stretches out below chain.

2. cycle chain tension force assistive device according to claim 1 is characterized in that: pedestal can be the plate that is coupling, and with the positioning end of registration mast be coupling the plate Joint;

This sleeve-board that is coupling is located on the five-way pipe, and is arranged on down between back vent and the sprocket wheel, and drag board and straining pulley stretched is located at the chain below and upwards supports.

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