CN2186698Y - Speed variator for middle axle of bicycle - Google Patents

Abstract

A speed variator installed to the central axle of bicycle is composed of main gear, small gear, chain wheel with internal teeth, movable supporter, clutch guide plate and driver.

Description

Bottom bracket bearing speed variator of bicycle

The utility model relates to the transmission system of bicycle.

In China, bicycle be to use the comparatively general vehicle, and variable speed bicycle is brisk to ride, climb laborsaving and looked at by people's parent, common in the market variable speed bicycle, its transmission system is arranged on rear axle.

The purpose of this utility model is to propose a kind of derailleur that is arranged on the axis.

The technical scheme of taking in the utility model year is the sprocket wheel that is provided with main gear and has internal tooth on axis, in the removable pin through hole of main gear, be provided with and travel(l)ing rest bonded assembly removable pin, on sprocket wheel, be provided with movable pin-and-hole, establish a pinion shaft at middle next to axis, pinion shaft and the axle sleeve sliding block joint that is fixed on the vehicle frame, end at pinion shaft is provided with the miniature gears for flexibly connecting with it, miniature gears not only with gear but also can with the sprocket wheel internal gearing, the clutch guide plate that is fixed on the vehicle frame is provided with guide groove, set pin on set pin on the pinion shaft and the travel(l)ing rest is connected with corresponding guide groove on the clutch guide plate respectively, and the gaffing device that is arranged on the handlebar place is connected with the clutch guide plate by steel rope.

Accompanying drawing 1 is a configuration diagram of the present utility model;

Accompanying drawing 2 is the overall diagram of bicycle.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Main gear (2) is set on the axis (3) of bicycle and has the sprocket wheel (1) of internal tooth, axis (3) is captiveed joint with main gear (2), axis (3) flexibly connects with sprocket wheel (1), present embodiment adopts sprocket wheel (1) protruding neck portion direct and main gear (2) to flexibly connect, 6-12 removable pin through hole is set on main gear (2), present embodiment is provided with 6 removable pin through holes, the interior removable pin (5) of captiveing joint that is provided with travel(l)ing rest (9), travel(l)ing rest (9) can slide along the carrying sleeve (20) that is fixed on the vehicle frame, on sprocket wheel (1), be provided with and the cooresponding pin-and-hole of main gear removable pin through hole (4), at the other pinion shaft (6) that is provided with of axis (3), pinion shaft (6) and axle sleeve (10) sliding block joint that is fixed on the vehicle frame (11), end at pinion shaft (6) is provided with miniature gears (7) and the ball packing ring (8) for flexibly connecting with it, miniature gears (7) and main gear (2) engagement, with sprocket wheel (1) the engageable disengagement of internal tooth, on vehicle frame, be provided with clutch guide plate (12), be provided with guide groove (14,16), set pin (15) on set pin (13) on the pinion shaft (6) and the travel(l)ing rest (9) respectively with clutch guide plate (12) on guide groove (14,16) connect, the gaffing device (17) that is arranged on the handlebar place is connected with clutch guide plate (12) by steel rope (18), gaffing device (17) adopts the gaffing device of existing derailleur, for helping steel rope (18) to reset, one wire spring (19) can be set on vehicle frame, one end is fixed on the vehicle frame, and the other end is connected with clutch guide plate (12).

In the removable pin (5) of main gear inserts the dowel hole (4) of sprocket wheel (1), drive sprocket rotation by axis (3) by main gear (2), at this moment miniature gears and sprocket wheel internal tooth are thrown off, bicycle belongs to cruising, when need go up a slope, press gaffing device (17), promoting clutch guide plate (12) level by steel rope (18) moves backward, because clutch guide plate (12) is gone up the effect of guide groove (14) and pinion shaft set pin (13), pinion shaft (6) is towards the sprocket wheel end motion, make miniature gears (7) go deep into sprocket wheel and its internal gearing, at the same time, deviates from from sprocket wheel (1) because the effect of clutch guide plate guide groove (16) and travel(l)ing rest set pin (15), travel(l)ing rest (9) drive removable pin (5), at this moment axis (3) is by main gear (2), miniature gears (7) drives sprocket rotation.

The utility model provides a kind of transmission system simple in structure, easy for installation for present widely used general bicycle.

Claims (1)

1. A kind of transmission system that is installed on the bicycle middle shaft, it is characterized in that: main gear (2) is set on axis (3) and has the sprocket wheel (1) of internal tooth, in the removable pin through hole of main gear (2), be provided with and travel(l)ing rest (9) bonded assembly removable pin (5), on sprocket wheel (1), be provided with movable pin-and-hole (4), at the other pinion shaft (6) of establishing of axis (3), pinion shaft (6) and axle sleeve (10) sliding block joint that is fixed on the vehicle frame (11), end at pinion shaft (6) is provided with the miniature gears (7) for flexibly connecting with it, miniature gears (7) not only with main gear (2) engagement but also can with sprocket wheel (1) internal gearing, the clutch guide plate (12) that is fixed on the vehicle frame is provided with guide groove (14,16), set pin (15) on set pin (13) on the pinion shaft (6) and the travel(l)ing rest (9) respectively with clutch guide plate (12) on guide groove (14,16) connect, the gaffing device (17) that is arranged on the handlebar place is connected with clutch guide plate (12) by steel rope (18).

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