CN2337068Y

CN2337068Y - Spring booster for bicycle

Info

Publication number: CN2337068Y
Application number: CN 98221268
Authority: CN
Inventors: 谢彬芝
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-05-25
Filing date: 1998-05-25
Publication date: 1999-09-08
Anticipated expiration: 2008-05-25

Abstract

The utility model relates to a spring booster for bicycle, which is composed of gearsets, a spring device and flywheels. The utility model is formed by that a set of power-driven gearsets are arranged on the central axis of the existing bicycle; a shaft sleeve is additionally arranged on the central axis; the elastic spring device is fixed on the shaft sleeve; a front wheel disc is fixedly provided with two flywheels; when a chain is returned, the shaft sleeve rotates with the front wheel disc, and simultaneously a spring is wound tightly tostore energy; when a pedal is trod in forward direction again, the spring gives off forward energy, reducing the forward force of feet to obtain the goal power assistance. The utility model has the advantages of reasonable and simple structure, easy use, low manufacture cost, broad application, etc.

Description

Bicycle spiral spring boosting device

The utility model belongs to the driving device of the vehicle, particularly relates to the propelling aid closed-center system of wheeled car.

Bicycle is a kind of being most widely used and walking-replacing tool easily, its power-assisted is exactly will make the cyclist import less power can obtain more energetically output, promptly reach the big stroke of bicycle with less foot-operated power, bicycle on the present market, they all must make pin just step on the power that could obtain forward forward, and the people is just stepping on very fatiguability for a long time by bike the time, in order to reduce firmly, people often instead after one section step on the muscle that several circles relax leg just stepping on, existing bicycle can not utilize this part anti-energy of stepping on, thereby causes the waste of power.

The purpose of this utility model just provides a kind of bicycle spiral spring boosting device, it is the energy when storing counter the stepping on of pin with clockwork spring, power forward of this device generation reaches power-assisted purpose when just stepping on or stopping to scrunch, it has rational in infrastructure, simple, easy to use, advantages such as wide should be arranged.

The purpose of this utility model realizes by the following technical solutions: be the principle of utilizing the spring energy storage, on existing bicycle axis, one group of power transmission gear group is installed, and add an axle sleeve at axis, be fixed with the elastic spring device thereon, and two flywheels (sharp teeth in the same way) in the same way are housed fixedly on preceding wheel disc, flywheel when one is jack, flywheel when another is normal chain.When forward is pedaled stretcher, because jack flywheel handle ratchet wheel is driven forward by axis and rotates, ratchet is blocked by the ratchet on the wheel disc, therefore wheel disc and chain are driven forward and are rotated, thereby the ratchet of positive chain flywheel can not be blocked by the gear teeth of ratchet, connection gear is pushed away gear cluster, and gear cluster is not worked, and the axle sleeve that has clockwork is motionless.And during jack since stepped gear wheel fall, its tooth blocks respectively with the tooth of active and driven gear, thereby driving axle sleeve rotates with axis, at this moment the ratchet because of flywheel rotates and the ratchet uncoupling with axis, be the commentaries on classics state that flies, this moment, wheel disc was motionless, simultaneously along with axle sleeve rotates the clockwork spring rolling-in, and stored energy.When stopping to scrunch stretcher (or forward steps again), clockwork spring is because of elasticity itself struts and discharge forward energy, the forward that has alleviated pin firmly, thereby reach power-assisted purpose.It has rational in infrastructure, simple, and is easy to use, and cost of manufacture is low, and advantages such as wide should be arranged.

The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment:

Fig. 1 is a three-dimensional exploded view of the present utility model;

Fig. 2 is a vertical section structure scheme drawing of the present utility model;

Fig. 3 is the A-A cross section view of Fig. 2;

Fig. 4 is the B-B cross section view of Fig. 2;

Among the figure: 1. wheel disc before, 2. axis, 3. axle sleeve, 4. driving gear, 5. driven gear, 6. stepped gear wheel (connection transmission gear), 7. stepped gear wheel portable bar, 8. position-limited trough, 9. ball bearing of main shaft, 10. drive gearbox, 11. wheel disc tooth, 12. normal chain flywheel hub, 13. ratchet, 14. ratchet anchor shaft, 15. spring leaf, 16. cocking lever, 17. positive chain flywheel ratchet, 18. elastic spring, 19. clockwork spring hold down groove, 20. jack flywheel ratchet, 21. ratchet.

In the drawings, be set with an axle sleeve 3 outside the axis 2, cooperate by bearing 9 between axle sleeve 3 and the axis 2.One elastic spring 18 by the drive of drive gearbox 10 internal tooth wheels is installed on axle sleeve 3, and gear case 10 is installed on the vehicle frame.Gear cluster is made up of driving gear 4, driven gear 5 and stepped gear wheel 6, driving gear 5 is fixedly mounted on the axis 2, driven gear 5 and ratchet 17 are located at respectively on two outer cylinder of axle sleeve 3, clockwork spring 18 is fixedly mounted on the hold down groove 19 in the middle of axle sleeve 3 outer cylinders, and promptly axle sleeve 3 is that driven gear 5, normal chain ratchet 17, clockwork spring fastener shaft are one.

Be installed with a flywheel hub 12 in the inboard of preceding chain drum 1, anchor shaft 14 is contained in ratchet 13 in the flywheel hub 12, stick the one side of ratchet 13 with spring leaf 15 bullets, should guarantee pressing spring leaf 15 to make ratchet 13 another sides relative during installation with the inclined-plane flank of tooth of ratchet 17, make on flywheel hub 12 and the axle sleeve 3 ratchet 17 mutually make-up form positive chain flywheel; The direction of the helical teeth of jack ratchet 20 is identical with the normal chain ratchet, ratchet 21 with 13 towards with identical.17 cards of positive chain flywheel melon 13 teeth do not live when the forward pedaling stretcher, and wheel disc 1 rotates with jack ratchet 20; On the contrary, the tooth card of jack flywheel pawl 21 and ratchet 20 does not live during backward pedaling, and wheel disc 1 is motionless.

The tooth of stepped gear wheel 6 little bull wheels can match with driving gear 4, driven gear 5 respectively.When pedaling stretcher forward, under the effect of axis 2, driving wheel 4 and ratchet 20 rotate forward, and wheel disc 1 rotates forward before driving, driving gear 4 contacts with stepped gear wheel 6, tooth to gear 6 forms a power of changeing downwards, because of position-limited trough 8 is a skewed slot, portable bar 7 is upwards passed, thereby do not influence the rotation forward of gear 4, and the ratchet 17 of flywheel be an one with axle sleeve 3, ratchet 13 is owing to contacting with oblique of ratchet, thereby spring leaf 15 is forward oppressed by ratchet 17, can be smooth rotate forward and be not subjected to the influence of tooth on the ratchet 17.When stopping (or backward) when pedaling stretcher, ratchet 13 is blocked by the tooth of ratchet 17, stepped gear wheel 6 is because of the gravity fall of itself, its tooth is matched with the tooth of driving gear 4 and driven gear 5 respectively, thereby driving whole axle sleeve 3 rotates backward, clockwork spring 18 is promptly stored the energy of having an effect forward by rolling-in.When more forward or when stopping, the energy of storage will play power-assisted effect.

Claims

1, a kind of bicycle spiral spring boosting device is made up of gear cluster, clockwork, flywheel, it is characterized in that adding an axle sleeve (3) at axis (2), is fixed with elastic spring (18) thereon, goes up at preceding wheel disc (1) two flywheels in the same way fixedly are housed.

2,, it is characterized in that described gear cluster is made up of driving gear (4), driven gear (5) and stepped gear wheel (6) according to the described spiral spring boosting device of claim 1.

3,, it is characterized in that described axle sleeve (3) and axis (2) cooperate for bearing (9) according to the described spiral spring boosting device of claim 1.

4,, it is characterized in that the tooth of described stepped gear wheel 6 little bull wheels can match with driving gear 4, driven gear 5 respectively according to claim 1 or 2 described spiral spring boosting devices.

5, according to the described spiral spring boosting device of claim 1, it is characterized in that wheel disc before described (1) upward fixedly is equipped with a flywheel hub (12), anchor shaft (14) is contained in ratchet (13) in the flywheel hub (12), stick ratchet (13) simultaneously with spring leaf (15) bullet, spring leaf (15) makes ratchet (13) another side relative with the inclined-plane flank of tooth of ratchet (17), makes ratchet (17) make-up mutually on flywheel hub (12) and the axle sleeve (3) of band ratchet (13).