CN2180579Y

CN2180579Y - Bicycle pedal type force-saving speed-increasing gearing device

Info

Publication number: CN2180579Y
Application number: CN93244647U
Authority: CN
Inventors: 吴泽保
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-12
Filing date: 1993-11-12
Publication date: 1994-10-26
Anticipated expiration: 2003-11-12

Abstract

The utility model relates to a bicycle seesaw type labor-saving speed-increasing transmission device, which is characterized in that the right end of a central shaft is provided with a left ratchet wheel and a right ratchet wheel near the right-hand side of a central joint; cranks are made into a seesaw type structure with back supporting arms; the left crank is connected with the inner ring of the left ratchet wheel through the central shaft; the right crank is connected with the inner ring of the right ratchet wheel; outer rings of the two ratchet wheels are fixedly connected to each other; a drive sprocket is arranged on the outer ring of the left ratchet wheel; the rear side of a vertical tube on the upper part of the central joint is also provided with a swing-typed lifting rod; the lifting rod is respectively hinged with two push rods; the two push rods are respectively hinged with the back supporting arms of the left and the right cranks. When riding, as long as pedaling the seesaw type the left and the right cranks foot pedals up and down and back and forth, a user can avoid upper and lower dead points and can drive a driven sprocket to rotate in order to realize the purpose of labor saving speed-increasing of riding.

Description

Bicycle pedal type force-saving speed-increasing gearing device

The utility model relates to a kind of manufacturing technology of bicycle, especially the laborsaving multiplying gear of the seesaw type of bicycle.

Existing bicycle driving device comprises axis, and the parts compositions such as vehicle frame center tap, sprocket wheel (dividing driving wheel and follower), chain, crank and pedal that are used to assemble axis.The cyclist drives bicycle by a pair of crank and pedal, because crank, pedal are done the circumference rotation around axis, in process by bike, all the time existing moment is zero idle first dead center and idle lower dead point, promptly at first dead center and lower dead point, the cyclist can't make crank play a role, thereby influences speed by bike.

The purpose of this utility model is at above-mentioned shortcoming, designs a kind of laborsaving multiplying gear of seesaw type of bicycle, makes that this driving device can laborsaving speedup, rides as long as the cyclist uses with equal time, and is not only laborsaving but also increased the speed per hour stroke.

The utility model is to realize like this, this driving device still comprises axis and is used to assemble parts such as the vehicle frame center tap of axis, drive sprocket, crank, pedal and forms, characteristics are by the right edge of vehicle frame center tap left ratchet and right ratchet (the available bicycle freewheel transformation of the way forms) to be installed at the axis right-hand member, again with about two cranks be designed to have the seesaw type structure of back arm; Wherein seesaw type left side crank links by the inner ring of axis and left ratchet, the direct inner ring with right ratchet of the right crank of seesaw type links, two outer rings (cover) of left and right sides ratchet fix connection (can be made of one), and drive sprocket fixedly is assemblied on the outer ring of left ratchet; Be arranged with the oscillating type lifting arm in standpipe rear lateral portion in addition near vehicle frame center tap top, each is movably hinged the two ends, the left and right sides of this oscillating type lifting arm with a push rod, left push rod wherein is again that the back arm with seesaw type left side crank is movably hinged, and right push rod also is movably hinged with the back arm of the right crank of seesaw type.

The principle process that this transmission device uses is as follows: when seesaw type left side crank is depressed by the cyclist, the drive sprocket that drive is installed on the left ratchet outer ring synchronizes them and then rotation, when seesaw type left side crank is depressed, lift up on its back arm, driving left push rod rises and lifts up on the left end that promotes the oscillating type lifting arm, the right-hand member bottom, from and the back arm bottom of the right crank of pushing seesaw type, right crank has upwards been lifted up, when the right crank of seesaw type by right threading following time, because of right ratchet outer ring is connecting firmly left ratchet outer ring, also and then rotate so can drive drive sprocket equally, when the right crank of seesaw type is depressed, its back arm is lifted up on also, drive right push rod and rise and promote the lifting arm swing, seesaw type left side crank has upwards been lifted up again, move and so forth and can order about drive sprocket and gyrate.

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

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the right elevation of Fig. 1;

Fig. 3 is the detail drawing of the utility model crank positioning plate.

Wherein, the 1st, drive sprocket, 2 left ratchets, the adapter sleeve of about 3 two ratchet outer rings, 4 right ratchets, 5 right push rods, 6 right cranks, 7 oscillating type lifting arms, 8 left cranks, 9 left push rods, 10 locating dowel pins, 11 fan-shaped positioning plates, 12 axis, 13 center taps, the back arm of 14 left cranks, the back arm of 15 right cranks, 16 standpipes, 17 lifting arms are installed the pin (playing point action) of usefulness, 18 pedals.

With reference to accompanying drawing as can be known, drive sprocket 1 is installed on the outer ring of left ratchet 2, seesaw type left side crank 8 is connecting the inner ring of left ratchet 2 by axis 12, and the right crank 6 of seesaw type is socketed in the inner ring of right ratchet 4, and the outer ring of left and right two ratchets is integral by adapter sleeve 3 captive joints.The rearward end of left and right sides crank is provided with back arm 14 and back arm 15 respectively, the bottom of a left side push rod 9 and right push rod 5 is movably hinged (two members adopt the revolute pair form to be connected, but also can adopt the connection of spherical pair form) mutually with the back arm 14 of left and right sides crank respectively with 15.Oscillating type lifting arm 7 is installed near near standpipe 16 rear lateral portion center tap 13 tops by the pin 17 that plays point action, the two ends of lifting arm 7 are movably hinged (two members adopt the revolute pair form to connect equally, but also can adopt the spherical pair form to connect) respectively mutually with the top of left and right sides push rod.The driving principle process of present embodiment is as previously mentioned: as long as reciprocation cycle is trampled seesaw type left and right sides crank pedal downwards, can drive drive sprocket and rotate bicycle is driven.

The utility model also is provided with a fan-shaped positioning plate 11 and locating dowel pin 10 is used to limit the amplitude that left and right sides crank swings up and down, and makes cyclist's both feet trample crank pedal in certain actuation range.This fan-shaped positioning plate 11 is installed on the center tap 13, and locating dowel pin one end that is set is fixed on the left crank 8, and its other end stretches in the spacing slotted eye of fan-shaped positioning plate 11.

Seesaw type crank of the present utility model is because of only pumping, so the arm of force often is in maximum rating, in fact the length of crank can manufacture than the crank of existing bicycle longer (as with regard to 28 " with regard to the bicycle; the crank 2cm that also can extend); therefore more laborsaving by bike; again because the crank of seesaw type is subjected to force direction not pass through axis all the time; this has just been avoided the appearance in transmission process of first dead center and lower dead point; as and to make the cyclist save time about 1/3rd, therefore, the cyclist uses with equal time and rides, and has but increased mileage.

Claims

1, a kind of laborsaving multiplying gear of seesaw type that is used for bicycle, the vehicle frame center tap (13) that comprises axis (12) and be used to assemble axis (12), drive sprocket (1), crank, pedal (18) parts are formed, it is characterized in that by the right edge of vehicle frame center tap (13) left ratchet (2) and right ratchet (4) being installed at axis (12) right-hand member, about two cranks be designed to have the seesaw type structure of back arm; Wherein seesaw type left side crank (8) links by the inner ring of axis (12) with left ratchet (2), the direct inner ring with right ratchet (4) of the right crank of seesaw type (6) links, two outer rings of left and right sides ratchet fix connection, drive sprocket (1) fixedly is assemblied on the outer ring of left ratchet (2), be arranged with oscillating type lifting arm (7) in standpipe (16) rear lateral portion near vehicle frame center tap (13) top, each is movably hinged the two ends, the left and right sides of this oscillating type lifting arm (7) with a push rod, left push rod (9) wherein is movably hinged with the back arm (14) of seesaw type left side crank (8) again, and right push rod (5) wherein also is movably hinged with the back arm (15) of the right crank of seesaw type (6).

2, the driving device of stipulating according to claim 1, it is characterized in that on center tap (13), being equipped with fan-shaped positioning plate (11), the locating dowel pin that is set (10) one end is fixed on the left crank (8), and the other end stretches in the spacing slotted eye of fan-shaped positioning plate (11).