CN2163786Y - Driving aid for cycle chains - Google Patents

Abstract

The utility model relates to a chain transmission booster for a bicycle, comprising a gasoline engine, a transmission case and an output system, which is characterized in that the speed decrease system of the transmission case is a stage two gear transmission comprising a driving gear (9), a stage one driven gear (14), a stage two driving gear (16) and an output gear (17); the man-power and the maneuver on-off clutch of the output system is a major diameter latch clutch comprising a zygote (19) and the output gear (17). The transmission system of the utility model has the advantages of simple and reasonable structure, good transmission reliability, long service life, reliable man-power and maneuver on-off performance, good engine performance, etc.; thus, the utility model is an ideal bicycle booster.

Description

Driving aid for cycle chains

The utility model belongs to the improvement to bicycle chain transmission servo-unit.

Servo-unit is the engine installation of morpet, and generally by spark ignition engine, transmission gearbox and output system are formed.Servo-unit can be divided into rub wheeled, back shaft type and three kinds of patterns of chain-driving by type of drive.With the spark ignition engine is the bicycle chain transmission servo-unit of power, is by the chain drive trailing wheel, transferring power, this type of drive comformability is strong.The driving efficiency height is as commercially available full-depth tooth wheel strand bar 300 type bicycle chain transmission servo-units.The part but this class servo-unit also comes with some shortcomings, as 4 grades of gear transmissions of deceleration system employing of transmission gearbox, complex structure, transmission link is too many, and fault rate is higher; Manpower, motor-driven deciliter adopt minor diameter canine tooth power-transfer clutch, and with cantilevered space cam manipulation shift fork, the damage of often skidding, reliability is very poor; The engine piston molded lines is unreasonable, easily produces pull-cylinder phenomena during high speed, and these problems do not solve, and have a strong impact on the technical performance and the application thereof of morpet.

The purpose of this utility model aim to provide a kind of simple and reasonable, reliable transmission is good, long function admirable of life-span, low cost of manufacture uses full-depth tooth easy to maintenance to take turns a kind of bicycle chain transmission servo-unit of strand bar, to satisfy the requirement of morpet.

Bicycle chain transmission servo-unit described in the utility model is made of spark ignition engine, transmission gearbox and the output system trinity.Spark ignition engine partly comprises spark ignition engine main frame and magneto generator, carburettor, silencer three big accessories.For improving the performance of driving engine, be provided with the saturating groove of selenodont in the piston boss both sides, improve piston bottom cooling condition and lubricating condition, the piston boss place is provided with down the concave plane, thus the pull-cylinder phenomena that piston boss produces greatly because of swell increment when having avoided the spark ignition engine high speed.Transmission gearbox partly comprises deceleration system, free-wheel clutch and centrifugal clutch etc.Be simplified structure, deceleration system adopts 2 grades of gear transmissions, thereby has reduced transmission link, has improved driving efficiency and reliability of service, has reduced manufacturing cost, and noise also reduces to some extent.Output system partly comprises the output combining mechanism: zygote, spline housing, tie-plate; Foot-on mechanism: foot-operated, axis, coupling sleeve, click power-transfer clutch; Sprocket wheel; Single supported beam rotating shaft shift fork etc.Because the major diameter bayonet clutch that has adopted zygote and output gear to form, and, make motor-driven deciliter of manpower more reliable with single supported beam rotating shaft control shift fork.

Fig. 1 is the structure principle chart of bicycle chain transmission servo-unit.

Fig. 2 is the front elevation of piston of gasoline engine.

Fig. 3 is the cutaway view of piston of gasoline engine.

Fig. 4 is the structure cutaway view of bicycle chain transmission servo-unit

Below in conjunction with accompanying drawing embodiment of the present utility model is described:

Bicycle chain transmission servo-unit described in the utility model is made of spark ignition engine, transmission gearbox and the output system trinity.Spark ignition engine partly comprises spark ignition engine main frame and magneto generator, carburettor, silencer three big accessories.Spark ignition engine is a small-sized single cylinder double stroke machine, is made up of cylinder (1), piston (2), connecting rod (3), bent axle (4), bearing (5).Be provided with the saturating groove of selenodont (6) in piston (2) key seat both sides, the key seat place is provided with down concave plane (7), to improve the performance of spark ignition engine.Bent axle (4) and the magneto generator flywheel (8) that is connected on it insert in the transmission gearbox, and form the single supported beam support with two ends antifriction-bearing box ［ 5 ］.The transmission gearbox part is by driving gear ［ 9 ］, free-wheel clutch ［ 10 ］, centrifugal clutch ［ 11 ］, and the shell of free-wheel clutch ［ 12 ］, driven disc ［ 13 ］, one-level ring gear ［ 14 ］, two ［ 15 ］, secondary driving gear ［ 16 ］, output gear ［ 17 ］ constitute.Free-wheel clutch ［ 10 ］ and centrifugal clutch ［ 11 ］ are connected on the bent axle ［ 4 ］ of spark ignition engine, and driving gear ［ 9 ］, free-wheel clutch shell ［ 12 ］ and driven disc ［ 13 ］ are formed the trinity.One-level ring gear ［ 14 ］ and secondary driving gear ［ 16 ］ are connected on two ［ 15 ］.Output gear ［ 17 ］ is enclosed within on the spline housing ［ 18 ］.The output system part is made up of output combining mechanism, foot-on mechanism, sprocket wheel and single supported beam rotating shaft shift fork etc.The output combining mechanism is made up of spline housing ［ 18 ］, zygote ［ 19 ］, tie-plate ［ 20 ］, mouth main bearing ［ 21 ］.Zygote ［ 19 ］ is enclosed within on the spline housing ［ 18 ］, and is connected with spline, can be in axial sliding on spline housing ［ 18 ］.Be evenly equipped with 3 touching columns ［ 31 ］ on ［ 19 ］ circumference in conjunction with giving, can insert in 6 uniform on output gear ［ 17 ］ circumference that is enclosed within on the spline housing ［ 18 ］ holes, form bayonet clutch.There is bearing ［ 21 ］ supporting at spline housing ［ 18 ］ two ends, and wherein right-hand member is equipped with tie-plate ［ 20 ］, is evenly equipped with 6 holes on tie-plate ［ 20 ］ circumference, and foot-on mechanism is by foot-operated ［ 22 ］, axis ［ 23 ］, coupling sleeve ［ 24 ］.Click power-transfer clutch ［ 25 ］, sprocket wheel ［ 27 ］, cushion rubber ［ 26 ］ are formed.Axis ［ 23 ］ passes spline housing ［ 18 ］, two foot-operated ［ 22 ］ are equipped with at two ends, coupling sleeve ［ 24 ］ is connected in axis ［ 23 ］ right-hand member, and combine with click power-transfer clutch ［ 25 ］, click power-transfer clutch ［ 25 ］ is connected with sprocket wheel ［ 27 ］, be evenly equipped with 6 holes on the latter's the former, cushion rubber ［ 26 ］ is housed in the hole, and put in and form flexible the connection in 6 holes of tie-plate ［ 20 ］.Single supported beam rotating shaft shift fork is by rotating shaft ［ 28 ］, torsion spring ［ 29 ］ and shift fork compositions such as ［ 30 ］.Shift fork ［ 30 ］ is connected with rotating shaft ［ 28 ］, and rotating shaft ［ 28 ］ can drive shift fork and turn right under the effect of torsion spring ［ 29 ］.

Its principle of work divides four kinds of states to be summarized as follows:

One, manpower riding condition

When handling rotating shaft ［ 28 ］ rotation, shift fork ［ 30 ］ drives zygote ［ 19 ］ and moves to left, the touching column ［ 31 ］ of zygote ［ 19 ］ separates with output gear ［ 17 ］, output gear this moment ［ 17 ］ so pin is stepped on foot-operated ［ 22 ］, rotates axis ［ 23 ］ at the overhead cover of spline housing ［ 18 ］, drive coupling sleeve ［ 24 ］, click power-transfer clutch ［ 25 ］, sprocket wheel ［ 27 ］ rotation, sprocket wheel ［ 27 ］ is by the chain drive trailing wheel.Sprocket wheel ［ 27 ］ drives tie-plate ［ 20 ］ by cushion rubber ［ 26 ］, spline housing ［ 18 ］, zygote ［ 19 ］ idle running, and the latch power-transfer clutch is in released state, and transmission system remains static.

Two, starting state

Unclamp the stear drawing line of rotating shaft ［ 28 ］, rotating shaft ［ 28 ］ is at the effect infradextroversion of torsion spring ［ 29 ］, driving zygote ［ 19 ］ by shift fork ［ 30 ］ moves to right, zygote ［ 19 ］ touching column ［ 31 ］ is inserted in the hole of output gear ［ 17 ］, be the combination of latch power-transfer clutch, thereby worked hard in glove with combining of output system and transmission system.

During starting, pin is stepped on foot-operated ［ 22 ］, click power-transfer clutch this moment ［ 25 ］ is in the forward mode of operation, so can drive output is work, by the transmission system of 2 grades of gears of latch power-transfer clutch drive, i.e. driving gear ［ 9 ］ rotation, free-wheel clutch this moment ［ 10 ］ is in the forward mode of operation, thereby bent axle ［ 4 ］ is rotated in the same way, realize the starting of spark ignition engine.

Three, idling mode

Petrol engine rotational speed is called idling below 2000 rev/mins the time.During idling, during gasoline engine crank ［ 4 ］ rotation, centrifugal clutch ［ 11 ］ is pressed on the clutch base under the effect of spring, can not drive driven disc ［ 13 ］ rotation, and free-wheel clutch ［ 10 ］ is in reverse released state, so driving gear ［ 9 ］ does not rotate.

Four, maneuvering condition

When the spark ignition engine high speed is rotated, centrifugal of centrifugal clutch ［ 11 ］ under the effect of force of inertia, overcoming spring tension closely compresses and combines with driven disc ［ 13 ］, the spark ignition engine moment of torsion will be transported to transmission system by bent axle ［ 4 ］, centrifugal clutch ［ 11 ］, driven disc ［ 13 ］, driving gear ［ 9 ］, drive output system and sprocket wheel ［ 27 ］ by the latch power-transfer clutch, thereby drive the morpet rear axle.Click power-transfer clutch this moment ［ 25 ］ is in reverse released state, sprocket wheel ［ 27 ］ initiatively, axis ［ 23 ］ does not rotate, does not and then change foot-operated ［ 22 ］.

Bicycle chain described in the utility model rotates booster and has following outstanding characteristics:

1, drive system structure advantages of simple, reliable transmission is good, and the life-span is long, low cost of manufacture, transmission efficiency height.

2, adopt the major diameter bayonet clutch, single supported beam rotating shaft control shift fork makes manpower, motor-driven deciliter more reliable.

3, the gasoline engine performance raising that makes moderate progress.

Claims (3)

1, a kind of bicycle chain transmission servo-unit, generally by spark ignition engine, the transmission gearbox and the output system trinity constitute, the transmission gearbox deceleration system that is characterised in that of the present utility model is by driving gear [9], one-level ring gear [14], 2 grades of gear transmissions that secondary driving gear [16] and output gear [17] are formed, the manpower of output system, the motor-driven deciliter major diameter latch power-transfer clutch that power-transfer clutch is made up of zygote [19] and output gear [17].

2, bicycle chain transmission servo-unit as claimed in claim 1, the operating mechanism that it is characterized in that manpower, motor-driven deciliter power-transfer clutch is by rotating shaft ［ 28 ］, the single supported beam rotating shaft shift fork that torsion spring ［ 29 ］ and shift fork ［ 30 ］ are formed.

3, bicycle chain transmission servo-unit as claimed in claim 1 is characterized in that there is the saturating groove of selenodont ［ 6 ］ piston of gasoline engine ［ 2 ］ key seat both sides, and the key seat place is provided with down concave plane ［ 7 ］.

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