CN2221549Y - Three-speed chain wheel of cycle - Google Patents

Abstract

The utility model provides a three-speed chain wheel for bicycles. The structure of the utility model is that a set of planet wheel system composed of a central gear, a planet wheel, an inner gear, a positioning sheet, a pressing sheet ring, a clip, a clamping sheet, a pawl, a spring, etc. and a speed regulating system are additionally arranged on the sides of a crank and a chain wheel. (As shown in the accompanying drawing of the summarization) the utility model can be regulated among a fast speed stage, an intermediate speed stage and a slow speed stage. The utility model can be arranged in a chain cover to protect driving parts. The utility model has the advantages of convenient installation, easy speed regulation and remote possibility of chain falling. The utility model is suitable for bicycles and tricycles driven by manpower.

Description

The bicycle three-speed gear

The utility model belongs to a kind of bicycle three fast transmission systems, be specially adapted to bicycle, manual tricycle fast, in, the device that uses of slow three fast speed changes.

In the prior art, the transmission system of bicycle mainly contains the how fast transmission system of exposed conveying appliance of cone pulley structure, and this Unit Installation and manufacturing are all complicated, and cost is higher, and chain easily produces and takes off the chain phenomenon during speed change.

The purpose of this utility model provide a kind of have be difficult for during convenient, the speed governing of the speed governing of slow three speed shelves in fast taking off chain, compact conformation can be installed in the bicycle three-speed gear that can protect driving parts preferably in the big chain cover and prevent to stain cyclist's clothing.

The purpose of this utility model is achieved in that to provide and adopts relative speedup and the deceleration principle that planetary gear system had, serving as that the basis is synthetic with this speed of sprocket wheel has soon, in, slow a kind of bicycle three-speed gear of three-speed, it includes crank (1) and sprocket wheel (17) interior, set up a cover by sun gear (22) at the side of crank (1) and sprocket wheel (17), the external fixed plate of sun gear (31), planetary wheel (19), compensating-gear shaft (20), compensating-gear shaft spacer (21), inner gear ring (10), inner gear ring spacer (8), crank rotating plate (6), sheet (27) in the crank rotating plate, compressing tablet circle (9), unidirectional clamp (23), two bullets are to clamp (5), two bullets are to card (12), two bullets are to card vertebra bar (16), fast shelves are stepped on sheet (28), spring, (running can be meshing with each other) planetary gear train of compositions such as sour jujube (can regulate and control two bullets to card (12) and two bullets to clamp (5)) speed governing system of unifying.Combining becomes the bicycle three-speed gear.According to planetary gear system (practice) principle: when center gear fixedly the time, if when the masterpiece of a rotation is used on the compensating-gear shaft (be planet gear wheel shaft for initiatively), inner gear ring will be with the equidirectional rotation of making relative speedup, if and when acting on the inner gear ring (being that inner gear ring is initiatively), compensating-gear shaft will be with the equidirectional rotation of slowing down relatively, this shows that the former speed of this sprocket wheel itself (title middling speed) is added by the two bullets of regulation and control in the speed governing system and made it to select in the planetary system to be active (speedup) or to be that active (deceleration) just can realize having soon with inner gear ring (10) with compensating-gear shaft (20) to the position of card (12) to clamp (5) and pair bullet, in, the bicycle three-speed gear of slow three kinds of speed.

The utility model compact conformation; only need when installing onboard as the single speed sprocket wheel with urgent the getting final product of leader pin double-screw bolt; so install easily; because only needing two bullets during speed change can realize to card (a 12) left side or some positions of right swing to clamp (5) and two bullet; need not as existing derailleur, dial chain; so be difficult for taking off chain; and can be installed in that the protection driving parts is not corroded by dust storm muddy water in the big chain cover; make bicycle keep aesthetic in appearance; be difficult for staiing cyclist's clothing; have fast; in; slow three speed shelves are adjustable; speed governing is convenient, can make the rider satisfy brisk demand freely.

Concrete structure of the present utility model is provided by following examples and accompanying drawing:

Fig. 1 is the utility model bicycle three-speed gear scheme drawing.Fig. 2 is the A-A line cut-away view along Fig. 1, and Fig. 3 is the scheme drawing of the part that cuts open of the quilt among Fig. 1, and Fig. 4 is the scheme drawing of removing among Fig. 1 behind the appearance part, and Fig. 5 is the scheme drawing of removing among Fig. 4 after 5,12,10,27.Fig. 6 is the scheme drawing of sun gear and the external fixed plate of sun gear, and Fig. 7 is the side schematic view of the external fixed plate of sun gear, and Fig. 8 is two bullets to card and two bullets to the state transformation scheme drawing of card push rod during in speed change.

In the accompanying drawings, 1 is sprocket wheel, 2 is that two bullets are to the clamp power spring, 3 for dialling the commentaries on classics spring, 4 be two bullets to clamp rotating shaft double-screw bolt, 5 be that pair bullets are to clamp, 6 is the crank rotating plate, and 7 is double-screw bolt, and 8 is the inner gear ring spacer, 9 is the compressing tablet circle, and 10 is inner gear ring, and 11 is spring, 12 be two bullets to card, 13 be double-screw bolt, 14 is that pair bullets are to card rotating shaft double-screw bolt, 15 is spring, 16 be two bullets to the card push rod, 17 is sprocket wheel, 18 is sour jujube, 19 is planetary wheel, and 20 is compensating-gear shaft, and 21 is the compensating-gear shaft spacer, 22 is sun gear, 23 is unidirectional clamp, and 24 is unidirectional clamp rotating shaft double-screw bolt, and 25 is sour jujube, 26 is unidirectional clamp holddown spring, 27 is the interior sheet of crank rotating plate, and 28 is that fast shelves are stepped on sheet, and 29 is double-screw bolt, 30 is double-screw bolt, 31 is the external fixed plate of sun gear, and 32 is oblong aperture, and 33 is hole, 34 is ball or the slipping ring that replaces with bead coil, and 35 is the planetary wheel shaft sleeve.

Describe the details of the bicycle three-speed gear that the utility model proposes in detail below in conjunction with accompanying drawing: the interior garden of sprocket wheel (17) has punching out inner gear ring (10) and gets the ratchet-like that stays behind the material, just in time form and make the unidirectional leading separation function of sprocket wheel (17) compensating-gear shaft spacer (21) with unidirectional clamp (23), corresponding recessed at sprocket wheel (17) with the sliding fit place of compensating-gear shaft spacer (21), the face of this two part is kept at grade, be beneficial to two bullets to card (12), inner gear ring (10) also at grade.Compressing tablet circle (9) is made through die mould, be fixed on the sprocket wheel (17) with double-screw bolt, with the band ratchet-like concave edge in sprocket wheel (17) outside jointly betwixt compensating-gear shaft spacer (21) and inner gear ring (10) pressure pipe, can rotate, and the outer garden sliding fit of the interior garden of compressing tablet circle (9) and inner gear ring stator (8), compressing tablet circle (9) is locating to have the room that makes two-way card (12) and push rod (16) spring (15) (11) thereof planar movable near two bullets to card (12), as shown in fig. 3.Inner gear ring (10) and planetary wheel (19) and sun gear (22) are at grade, the running of can intermeshing, the Wai Yuanchu of large internal gear circle (10) has sour jujube shape, such as they (10) among Fig. 4 signal, its when (cw) changes forward each angle of sour jujube all identical, about 70 degree, be used for the Ka Zui of the two bullets in card top to card (12), the usefulness of sprocket wheel (17) propelling, when it turns round, each angle of sour jujube can two bullets to the Ka Zui of card (12) push away inner gear figure (10) and bullet to another side, the propulsive force of sprocket wheel (17) need be finished by unidirectional clamp (23), when it turns round, have only two angles (indicating the angle at A word place as they (10) among Fig. 4) approximate right angle in the angle of sour jujube, it is to be used for cooperating two bullets to finish two bullets to the leaving inner gear ring (10) of card (12) and bullet sends back to and inner gear ring (10) usefulness of stuck position mutually to the Ka Zui of another side to card push rod (16).Two bullets are rotatably mounted on the sprocket wheel (17) with double-screw bolt (14) to card (12), front end at the Qi Kazui place makes spring (11) can be installed in its beneath activity by die mould, (11) one on spring is installed in sprocket wheel (17), the other end is installed in two bullets on card (12), the position of installing will guarantee to make two bullets can the tight inner gear ring of bullet (10) can be pushed its portion of chewing open bullet to the position of another side (leaving inner gear ring (10)) just effectively when turning round by inner gear ring (10) again to the portion of chewing of card (12), two bullets are installed movably to card push rod (16) at two bullets to the afterbody of card (12), control by spring (15), make it can have different location as shape illustrated in Figure 8, two bullets should be less than or equal to the thickness of inner gear ring (10) to the gross thickness of card push rod (16) to card (12) and two bullet.Inner gear ring spacer (8) is fixed on the inner gear ring (10) with double-screw bolt, and assurance concentric locating, its outer garden and compressing tablet circle (9) sliding fit, its inner rim has the sour jujube shape recess that can match to clamp (5) with two bullets, make its fastening mutually, push-jump forward and push-jump backward, and have the die mould scrobicular ring, can be with the outer garden sliding fit of crank rotating plate (6) or by the bead coil sliding fit, and can not understand outer taking off by clamp crank rotating plate (6).Crank rotating plate (6) fixes with the interior sheet (27) of crank rotating plate, be used for installing two bullets between it to clamp (5) and spring (2) and spring (3) usefulness, crank rotating plate (6) is fixed on the crank (1), have the oblong aperture (32) that can appear spring (3) afterbody thereon and have hole (33) be used for to two bullets to clamp (5) plane earth change put can with the mutually stuck usefulness in sour jujube position of inner gear ring spacer (8).Compensating-gear shaft spacer (21) is as 21 signals of Fig. 5, its outer garden and sprocket wheel (17) sliding fit, its outside is fixed by sprocket wheel (17) holder, and unidirectional clamp (23) is installed, its core projection, and located hole at drawing dotted line (two opposite side straight lines), make sun gear (22) planetary wheel (19) can contact with each other engagement by hole, sour jujube (18) that also has projection at the position of projection, two bullets promote the preceding commentaries on classics of compensating-gear shaft spacer (21) to stuck this sour jujube of clamp (5) (18), and can push two bullets to the tight inner gear ring spacer of another side bullet (8) to clamp (5) again when turning round.Locate to also have sour jujube of projection (25) laterally at nearly unidirectional clamp (23),, unidirectional clamp (23) can only be arranged, sprocket wheel (17) can be separated in advance to a side of spring (26) as the rear position-arresting of unidirectional clamp (23).Sun gear (22) is stuck mutually with the external fixed plate of sun gear (31), and sliding sleeve is gone into or the loose a little axis that is inserted in one heart.The external fixed plate of sun gear (31) is managed by the garden that half garden shape screens sticks on the vehicle body frame, and sun gear (22) can not be rotated.Two bullets are installed in rotation on crank rotating plate (6) and in it between sheet (27), guarantee that by power spring (2) it can be tight to inner gear ring spacer (8) bullet to clamp (5), conversely also can bullet is tight on one side to sour jujube (18) of compensating-gear shaft spacer.Fast shelves are stepped on sheet (28) and are installed in rotation on the crank (1), go out as shown in Figure 1, when pushing with heel, just can push be close to two bullets to sour jujube (18) to the Ka Zui of clamp (5) by dialling commentaries on classics spring (3).So two bullets rotated before and after clamp (5) both can select to stick inner gear ring spacer (8), can select to stick sour jujube (18) again and promote compensating-gear shaft spacer (21) and rotate forward, and the tight inner gear ring spacer (8) that just can rebound when when turning round, running into the top power of sour jujube (18).Planetary wheel (19) can have one to a plurality of by different topological design, it is two in this place's example, its axle (20) can be fixing with planetary wheel (19), can also be fixing with compensating-gear shaft spacer (21), make planetary wheel (19) that the sliding fit running can be arranged but all must reach, planetary wheel shaft sleeve (35) is exactly to use as sliding fit when compensating-gear shaft (20) and satellite gear (19) are used for when being fixed together being tightly packed on the compensating-gear shaft spacer (21).Carefully stating and can draw above comprehensive: a. sun gear (22) can not rotate, b. planetary wheel (19), the rotation of intermeshing of the tooth of sun gear (22) and inner gear ring (10), c. two bullets are subjected to the control to card push rod (16) of inner gear ring (10) and pair bullet to the portion of chewing of card (12), forward and realize in turning round that chucking leaves inner gear ring (10), d. two bullets are subjected to fast grade to step on sheet (28) and controlling of sour jujube (18) and can select it to the chucking of inner gear ring spacer (8) and compensating-gear shaft spacer (21) or separate to clamp (5).

The speed governing system work that this bicycle three-speed gear is described in detail in detail below in conjunction with accompanying drawing is as follows:

Rotational force on the crank (1) advances to card (12) or unidirectional clamp (23) promotion sprocket wheel by passing to two bullets by two bullets again to clamp (5), and unidirectional clamp (23) need not be regulated and control, two bullets are stepped on sheet (28) with the pin pressure by fast shelves to clamp (5) and are finished, so more easily understand, about two bullets to the service condition of card (12) as schematically shown in Figure 8: the state of A is that two bullets are stuck mutually to card (12) and inner gear ring (10), this moment is if inner gear ring (10) soon becomes the B state backward, become separation by mutually stuck, change forward this moment is can displacement, and continue backward to change promptly to become the C state, the C state generally is a transition condition, majority is to go to the D state after can continuing, but no matter C or D state, all same meeting become A condition again again when changeing forward, this shows: two bullets after the regulation and control of card are to rely on, step on change half-turn to a circle (practical experience) just can make by chucking variation from, step on forward more just can make and become chucking and step on turn around above (all same) backward by separating to how many circles.In the accompanying drawings, the illustrated in fig. 3 pair of bullet is to belong to state at a slow speed to card (12) and two bullet to the position of clamp (5), the power of stepping on forward this moment by pair bullets to clamp (5) to inner gear ring (10) to planetary wheel (19) and compensating-gear shaft spacer (21) push away sprocket wheel (17) with relative deceleration (at a slow speed) from unidirectional clamp (23) and advance.1 shown pair of bullet of accompanying drawing is to belong to middling speed (this speed of sprocket wheel) state to card (12) and two bullet to the position of clamp (5), this moment, two bullets directly tightened two bullets to card (12) to clamp (5) by inner gear ring (10), did not pass through the increase and decrease speed of planet tooth system.Two bullets shown in the accompanying drawing 4 are to belong to fast state to card (12) and two bullet to the position of clamp (5), and the power of stepping on forward this moment passes to two bullets to card (12) and sprocket wheel (17) to inner gear ring (10) with speedup (fast) to planet wheel spindle spacer (21) to planetary wheel (19) to clamp (5) by two bullets.Illustrated in fig. 4 pair of bullet of above Fig. 3 Fig. 1 is exactly the speed regulating method of this sprocket wheel to card (12) and two bullet to the mutual conversion in the position of clamp (5):

(1) steps on backward by (Fig. 3) at a slow speed and take two turns that to step on forward be middling speed (Fig. 1) again;

(2) step on backward by middling speed (Fig. 1) and turn around that to step on forward be (Fig. 3) at a slow speed again;

(3) by middling speed (Fig. 1) press by fast shelves step on sheet (28) just (Fig. 4) fast;

(4) step on backward by fast (Fig. 4) and take two turns that to step on forward be middling speed (Fig. 1) again;

(5) step on backward and can not change gear below changeing half-turn.

Claims (1)

1. bicycle three-speed gear, it includes crank (1) and sprocket wheel (17) interior, it is characterized in that: set up a cover by sun gear (22) at the side of crank (1) and sprocket wheel (17), the external fixed plate of sun gear (31), planetary wheel (19), compensating-gear shaft (20), compensating-gear shaft spacer (21), inner gear ring (10), inner gear ring spacer (8), crank rotating plate (6), sheet (27) in the crank rotating plate, compressing tablet circle (9), unidirectional clamp (23), two bullets are to clamp (5), two bullets are to card (12), two bullets are to card push rod (16), fast shelves are stepped on sheet (28), spring, the planetary gear train of compositions such as the sour jujube speed governing system of unifying, mutual alignment relation and annexation in this system between the element are: inner gear ring is fixed on the inner gear ring spacer, the crank rotating plate is being decided in the holder of inner gear ring spacer clamp, the crank rotating plate is fixed on the crank, planetary wheel is installed in rotation on the compensating-gear shaft spacer, the sun gear pine is inserted in axis and does not rotate with the vehicle frame fastening, the tooth of inner gear ring and planetary wheel and sun gear is meshing with each other and on same plane, sprocket wheel and compressing tablet circle are fixed together with double-screw bolt and clamp compensating-gear shaft spacer and inner gear ring, the cylindrical place of large internal gear circle, the inner circle of inner gear ring spacer, all has sour jujube on the inner circle of sprocket wheel and the compensating-gear shaft spacer, two bullets are installed on the sprocket wheel to card, its position is to match with sour jujube of inner gear ring, two bullets are installed on the crank rotating plate to clamp, its position is to match with sour jujube on inner gear ring spacer and the compensating-gear shaft spacer, unidirectional clamp is installed on the compensating-gear shaft spacer, its position is to match with sour jujube of sprocket wheel inner circle, fast shelves are stepped on sheet and are installed on the crank, match to clamp with two bullets by dialling commentaries on classics spring (3) in its position.

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