CN2693648Y - Adjusting device for motorcycle chain - Google Patents

Abstract

The utility model relates to an adjusting device for motorcycle chain, comprising a flat fork and an adjusting plate arranged on the axle end of the rear wheel. The flat fork is fixed with a stop pin whose side face is contacted with the outer edge of the adjusting plate; the distance from any point on the outer edge of the adjusting plate which is contacted with the side face of the stop pin to the center of the axle hole of the adjusting plate increases as the increasing of the included angle between the connecting line of the point on the outer edge of the adjusting plate and the center of the axle hole of the adjusting plate and the horizontal line which passes through the center of the axle hole of the adjusting plate; the adjusting plate is provided with at least two position holes; the flat fork is provided with a position rod which is matched with the flat fork in a sliding mode, and sheathed with a pressure spring; one end of the position rod supports on one side wall of the flat fork, and the other end supports on the other side wall of the flat fork and extends into the position hole on the adjusting plate; the end of the position rod which extends into the position hole is wedge type. The adjusting device for chain can smoothly and tightly adjust the motorcycle chain which is tighter itself again; the operation is convenient and labor saving, and can be completed without using other auxiliary devices.

Description

Motorcycle chain regulating mechanism

Technical field

The utility model relates to a kind of device that motorcycle chain is regulated that is used for.

Technical background

The device that is used for the motorcycle chain adjusting at present mainly contains two kinds, and a kind of is by the mode of threaded adjusting chain to be regulated, and promptly turn adjusting bolt drive regulating plate and move by spanner, regulating plate pulling motorcycle rear axle, thus realize adjustment of chain.The major defect of this kind control apparatus is to regulate bolt to be easy to generate stripped thread, influences the normal use of control apparatus; Another kind of adjusting device for chains such as Fig. 4, shown in Figure 5, constitute by chain stay, motorcycle rear axle, regulating plate and backing pin, regulating plate is the special-shaped plate that a radius changes with central angle, its outer rim is a tooth-shape structure, the rotation regulating plate can spur motorcycle rear axle and move, to realize adjustment of chain, has regulated in the teeth groove that back backing pin is stuck in the regulating plate outer rim location with the realization regulating plate.The major defect of this kind control apparatus is, when rotating regulating plate, backing pin need be crossed a tooth top during from a teeth groove to another teeth groove, and with regard to tightly need further tighten the time, this control process is difficult to be finished smoothly at motorcycle chain itself.

The utility model content

Technical problem to be solved in the utility model provides a kind of motorcycle chain regulating mechanism, and when the regulating plate that utilizes radius to change with central angle carried out chain condition, adjustment of chain can be finished smoothly.

Motorcycle chain regulating mechanism described in the utility model comprises motorcycle bottom fork, offer groove on it for the motorcycle rear axle parallel motion, and regulating plate, offer axis hole on it, regulating plate by this axis hole be installed in the trailing wheel axle head and with the hind axle bearing fit, be fixed with backing pin on the chain stay, the backing pin side contacts with the regulating plate outer rim, and on the regulating plate outer rim of backing pin contacts side surfaces arbitrarily a bit and the distance at regulating plate axis hole center increase with this point and the regulating plate axis hole line of centres on the regulating plate outer rim and the increase of passing through the angle between the horizon at regulating plate axis hole center; At least offer two spacing holes on regulating plate, each spacing hole center equates with the distance of regulating plate outer rim; Position-limited lever and chain stay bearing fit are installed on chain stay, be with pressure spring on it, position-limited lever one end is supported on a sidewall of chain stay, the other end is supported on another sidewall of chain stay and stretches in the spacing hole on the regulating plate, position-limited lever can overcome pressure spring and move along its axis, and the end that position-limited lever stretches in the spacing hole is a wedge.

The axial line of the axial line of described backing pin and position-limited lever and regulating plate upper shaft hole is located in the same horizontal plane.

When regulating chain, rotate regulating plate, regulating plate will apply a pressure to position-limited lever wedge end inclined-plane, produce and to move axially and withdraw from the spacing hole from regulating plate thereby make position-limited lever overcome pressure spring on it, when moving to the position-limited lever position to next spacing hole, position-limited lever ejects under the pressure spring effect again to this spacing hole once more to stop regulating plate to circle round, make the regulating plate location, in this process, regulating plate drives motorcycle rear axle and moves, thereby realizes adjustment of chain.

The utility model is owing to adopt spacing hole and position-limited lever on the regulating plate to come regulating plate is positioned, replaced the locate mode between former adjusting device for chains employing regulating plate outer rim teeth groove and backing pin, thereby make the regulating plate outer rim can be designed to a level and smooth stream line pattern curved surface, when regulating chain, it is lighter more laborsaving than rotating the regulating plate with profile of tooth outer rim to rotate the regulating plate that this kind have a stream line pattern curved surface, so when itself is further tightened with regard to tighter motorcycle chain, this control process can carry out smoothly, easy to operate, laborsaving, need not other accessory appliances can finish smoothly.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 looks scheme drawing for the master of a kind of concrete structure of motorcycle chain regulating mechanism described in the utility model;

Fig. 2 is the cutaway view of A-A line among Fig. 1;

Fig. 3 is the cutaway view Amplified image of B-B line among Fig. 1;

Fig. 4 looks scheme drawing for the master of existing adjusting device for chains;

Fig. 5 is the birds-eye view of C-C line among Fig. 4.

The specific embodiment

As Fig. 1, Fig. 2 and shown in Figure 3, this motorcycle chain regulating mechanism comprises motorcycle bottom fork 3, offer groove 9 on it for motorcycle rear axle 8 parallel motions, and regulating plate 1, offer axis hole on it, regulating plate 1 by this axis hole be installed in hind axle 8 ends and with hind axle 8 bearing fits, regulating plate 1 can be rotated around hind axle 8, and regulating plate 1 is positioned at chain stay 3 outsides.On the outside of chain stay 3, be fixed with backing pin 5, backing pin 5 sides and regulating plate 1 outer rim 2 closed contacts, and on regulating plate 1 outer rim 2 of backing pin 5 contacts side surfaces arbitrarily a bit and the distance at regulating plate 1 axis hole center increase with this point on regulating plate 1 outer rim 2 and the regulating plate 1 axis hole line of centres and the increase of passing through the angle between the horizon at regulating plate 1 axis hole center, be a level and smooth stream line pattern curved surface thereby make regulating plate 1 outer rim 2.On regulating plate 1, offer ten spacing holes 4, its aperture unanimity and equidistant placement, and each spacing hole 4 center equates with the distance of regulating plate 1 outer rim 2.Position-limited lever 6 is installed on chain stay 3, position-limited lever 6 two ends are supported on the inside and outside two side of chain stay 3 parallel with motorcycle rear axle 8 respectively, position-limited lever 6 and chain stay 3 bearing fits, position-limited lever 6 can be moved along its axis, be with pressure spring 7 on the position-limited lever 6, the end that position-limited lever 6 is supported on chain stay 3 lateral walls has a shoulder 10, one end face of shoulder 10 contacts with the inwall of chain stay 3 lateral walls, pressure spring 7 between the inwall of this shoulder 10 and chain stay 3 inboards, thereby can make position-limited lever 6 overcome pressure spring 7 vertically in chain stay 3 side direction move.The end that position-limited lever 6 is supported on chain stay 3 lateral walls is a wedge, and this wedge end stretches in the spacing hole 4 of regulating plate 1 regulating plate 1 can not be rotated.Be fixed on the axial line of the backing pin 5 on chain stay 3 outsides and be installed in the axial line of the position-limited lever 6 on the chain stay 3 and the axial line of regulating plate 1 upper shaft hole is located in the same horizontal plane.

When regulating chain, rotate regulating plate 1, regulating plate 1 will apply a pressure to position-limited lever 6 wedge end inclined-planes 11, thereby make position-limited lever 6 overcome that pressure spring 7 on it produces moving axially of side direction in chain stay 3 and withdraw from the spacing hole 4 from regulating plate 1, when moving to position-limited lever 6 positions to next spacing hole 4, position-limited lever 6 ejects once more to this spacing hole 4 under pressure spring 7 effects again and circles round with prevention regulating plate 1, makes regulating plate 1 location; In this process and since backing pin 5 sides all the time with regulating plate 1 outer rim 2 curved surface closed contacts, and backing pin 5 stationkeeping are constant, so make regulating plate 1 drive that motorcycle rear axle 8 moves away from backing pin 5, thereby the realization adjustment of chain.

Claims (2)

1, a kind of motorcycle chain regulating mechanism, comprise motorcycle bottom fork (3), offer groove (9) on it for motorcycle rear axle (8) parallel motion, and regulating plate (1), offer axis hole on it, regulating plate by this axis hole be installed in the trailing wheel axle head and with the hind axle bearing fit, be fixed with backing pin (5) on the chain stay, the backing pin side contacts with regulating plate outer rim (2), it is characterized in that: and the regulating plate outer rim (2) of backing pin (5) contacts side surfaces goes up arbitrarily a bit and the distance at regulating plate axis hole center increases with this point and the regulating plate axis hole line of centres on the regulating plate outer rim and through the increase of the angle between the horizon at regulating plate axis hole center; At least offer two spacing holes (4) on regulating plate, each spacing hole center equates with the distance of regulating plate outer rim; Position-limited lever (6) and chain stay bearing fit are installed on chain stay (3), be with pressure spring (7) on it, position-limited lever one end is supported on a sidewall of chain stay, the other end is supported on another sidewall of chain stay and stretches in the spacing hole (4) on the regulating plate (1), position-limited lever can overcome pressure spring and move along its axis, and the end that position-limited lever stretches in the spacing hole is a wedge.

2, adjusting device for chains according to claim 1 is characterized in that: the axial line of the axial line of described backing pin (5) and position-limited lever (6) and regulating plate (1) upper shaft hole is located in the same horizontal plane.

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