CN2284317Y - Lever boosting mechanism - Google Patents

Abstract

The utility model discloses a lever boosting mechanism, comprising two levers. A heavy arm of each lever is smaller than a force arm, a flywheel is arranged on a power output shaft, one end of a chain, which is meshed with the flywheel, is fixed on the stress of the lever, the other end of the chain is connected with a tension spring, and the other end of the tension spring is fixed at the fulcrum at the top end of the lever; a return spring is arranged at the force arm end of the lever. The Boosting mechanism can be arranged on a common bicycle, and a driving wheel of the bicycle can be omitted; when the force arms of the levers are trod, the chain can be pulled to drive flywheel to drive the power output shaft and wheels to rotate, so that the purposes of boosting and speeding up can be realized. The boosting mechanism can also be made into boosting tricycles, boosting vehicles for lifting water, etc.

Description

Lever boosting mechanism

The utility model relates to a kind of boosting mechanism, and particularly a kind of lever boosting mechanism belongs to machinery manufacturing technology field.

In some manual machines, it is a lot of that lever principle is used, and in the conventional art, under lever principle instructed, the lever machinery of reinforcement mostly was and increases static(al), can not increase power, so its application is subjected to certain limitation.

The purpose of this utility model is to provide a kind of lever boosting mechanism, and it has overcome the defective that lever can not increase power.

The purpose of this utility model is to realize like this.Lever boosting mechanism comprises two kinds of forms, a kind of is an axle construction, gravity arm of lever is less than the arm of force of lever in the structure, it also comprises pto, flywheel is housed on the pto, is fixed in the emphasis place of lever with chain one end of flywheel engagement, the other end connects extension spring, the other end of extension spring is fixed in the support end of lever, is provided with return spring at the arm of force end of lever.Another kind is two axle construction, and it is to increase a live axle on the basis of an axle construction, and it is parallel with the motive force output shaft, and flywheel is housed on live axle, is connected by chain between the gear on this flywheel and the pto.In the boosting mechanism of above-mentioned two kinds of forms, the weighing arm of lever is got with the ratio of the arm of force and all could in 1: 2 or 1: 3 or 1: 4 or 1: 5.

The lever boosting mechanism that the utility model provides is specially adapted on manpower bicycle or the pedicab.

What Figure of description 1 provided is the structural representation of the utility model one axle construction lever boosting mechanism.

What accompanying drawing 2 provided is the structural representation of the utility model two axle construction lever boosting mechanisms.

What accompanying drawing 3 provided is the structural representation that utilizes the boost bicycle of an axle construction lever boosting mechanism.

What accompanying drawing 4 provided is the structural representation that utilizes the boost bicycle of two axle construction lever boosting mechanisms.

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

With reference to Figure of description 1, a kind of lever boosting mechanism comprises two levers, and the weighing arm of lever is L, the arm of force is M, and L＜M, desirable following ratio: L: M=1: 2 or 1: 3 or 1: 4 or 1: 5, flywheel 2 is housed on the pto 5, be fixed on lever emphasis b place with chain 3 one ends of flywheel 2 engagements, the other end connects extension spring 1, and the other end of extension spring 1 is fixed in the fulcrum a place of lever, is provided with lever return spring 4 at lever arm of force M end.

Gravity arm of lever L got 1: 3 with the ratio of arm of force M in this structure, applied active force when depressing force C, and two emphasis b produce treble power, the chain drive-belt 3 of respectively leaving behind, then chain 3 respectively drives 18 tooth flywheels 2 and turns over 9 gear teeth (half-turn), the pto rotation, and then the lever static(al) is transformed into power.On pto 5, power output wheel is installed, just can be combined into reinforcement machinery, realize various objectives with other facility.With reference to accompanying drawing 2, the pto 5 that is positioned in the middle of two levers is provided with gear 6, also comprises the live axle 7 parallel with pto 5 in this structure, and flywheel 8 is housed on live axle 7, and gear 6 is connected with flywheel 8 by chain 9.The weighing arm L of lever got 1: 5 with the ratio of arm of force M in this structure, when depressing force C, two emphasis b respectively produce 5 times of gravity, pulling chain drive-belt 3, and drive 2 rotations of 18 tooth flywheels, make 54 coaxial tooth speed change gears 6 rotate, drive chain 9, and then the flywheel 8 that drives on the live axle 7 turns round realization speedup, the purpose of reinforcement.Shown in accompanying drawing 3, boost bicycle is to remove foot-driven lever and driving wheel on traditional bicycle basis, and respectively adorn a fixing frame 10 with rear-wheel spindle 5 both sides herein, extend out about 3 centimeters in rain lid back backward, rack 11 behind the seat extends backward and each is connected up and down with a steel bar with following fixing frame 10 both sides, the point build-in is fixed, and the rear-wheel spindle both sides is respectively installed one 18 tooth flywheel 2 and made driving wheel.People's both feet alternately depress, and two weighing arm L and arm of force M length ratio are that 1: 3 lever force C applies active force.Two fulcrum a activity is set on the fulcrum pin, and emphasis b produces treble power in order to chain drive-belt 3, drives 18 tooth flywheels 2, drives rear-wheel spindle 5 rotations and advances.One end of chain drive-belt 3 is fixed on lever emphasis b place, and another carries extension spring 1 of connection, and the other end of extension spring is fixed in fulcrum a place.Among Fig. 3,12 are the position-limited rack that resets, and strengthen restoration spring and are located at herein.Three times of this structure boost bicycle reinforcements, not speedup degree.Referring to accompanying drawing 4, it is the boost bicycle of two axle construction, on the basis of standard bicycle, remove foot-driven lever and drive sprocket axle, at this place and rear axle 5 both sides a fixing frame 10 is installed respectively, and is extended 35 centimetres backward, the rack 11 under the seat extends away backward, respectively be connected up and down with a steel bar with following fixing frame 10 both sides, the some build-in is fixed.About 12 centimeters both sides are embedded axle bed 13 in trailing wheel Yu Gai back, a live axle 7 is installed, one 90 tooth speed change gear 6 is installed in the middle of this, one 18 tooth flywheel 2 is respectively installed in the both sides, respectively bear the gravity of lever emphasis b, each rotates with the trailing wheel that chain drive-belt 3 drives boost bicycle.One end of chain drive-belt 3 is fixed in lever emphasis b place, and the other end connects an extension spring 1, and the other end of extension spring is fixed in fulcrum a place.It is that 1: 5 lever force C applies active force that people's both feet alternately depress two weighing arm L and arm of force M length ratio, two fulcrum a activity is set on the fulcrum pin, emphasis b respectively produces five times of gravity in order to chain drive-belt 3, each drives 18 tooth flywheels 2, axle changes 90 tooth speed change gears 6 and rotates 30 gear teeth, utilize 18 tooth flywheels 2 on drive chain 9 each transmission boost bicycle rear-wheel spindle, running 1.65 circles, 3.3 circles altogether turn round, realize that bicycle advances fast, 1.7 times of this structure boost bicycle reinforcements, 3.3 times of speedups.Change pulley 6 is as using 72 gears, and then reinforcement is 2.3 times, 2.7 times of speedups.Speed change gear 6 as with 54 gears, then reinforcement is 3 times, 2 times of speedups.

The technological progress that the utility model is obtained is as follows: use the force-increasing mechanism of lever principle design to can be applicable to many On kind of the facility, such as making boost bicycle, increase the power tricycle, increasing power and carry waterwheel, increase power hay cutter etc. Thereby alleviated manual labor and improved operating efficiency; That uses the utility model manufacturing increases power machinery, structure letter Single, easy to operate, therefore easy to utilize.

Claims (3)

1, a kind of lever boosting mechanism is characterized in that: the weighing arm of two levers is L, and the arm of force is M, and L＜M, and flywheel (2) is housed on the pto (5); Be fixed on lever emphasis b place with chain (3) one ends of flywheel (2) engagement, the other end connects extension spring (1), and the other end of extension spring (1) is fixed in the fulcrum a place of lever, is provided with return spring (4) at the arm of force M of lever end.

2, by the described lever boosting mechanism of claim 1, the weighing arm L that it is characterized in that lever is 1: 2 or 1: 3 or 1: 4 or 1: 5 with the ratio of arm of force M.

3, by the described lever boosting mechanism of claim 1, it is characterized in that: be positioned at the middle pto (5) of two levers and be provided with gear (6), also comprise the live axle (7) parallel with pto (5), flywheel (8) is housed on live axle (7), and gear (6) is connected with flywheel (8) by chain (9).

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