CN2411201Y

CN2411201Y - Simple bicycle sprocket wheel

Info

Publication number: CN2411201Y
Application number: CN 00205456
Authority: CN
Inventors: 星志杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-18
Filing date: 2000-02-18
Publication date: 2000-12-20
Anticipated expiration: 2010-02-18

Abstract

The utility model relates to a rear chain wheel of a manpower cycle. The middle of the rear chain wheel of the utility model is provided with an inner hole; a plurality of through holes are arranged on the periphery; one side of a ratchet wheel is provided with an outer cylindrical surface which forms a slide fit with the inner hole of the rear chain wheel; the pawl end of a ratchet pawl provided with a thin wire; one end of the thin wire presses on the pawl end of the ratchet pawl and passes through one of the through holes of the rear chain wheel to be sheathed on the outer cylindrical surface of the ratchet wheel; the other end of the thin wire is fixed on the other through hole of the rear chain wheel. Thus, the utility model has the advantages of simple structure and low cost and the utility model is especially convenient for manual repairing.

Description

Sprocket wheel behind the simple and easy rickshaw

The utility model relates to sprocket wheel behind a kind of rickshaw.

At present, ratchet and pawl arrangement in the sprocket wheel behind the rickshaw (as: bicycle, trishaw etc.) needs rolling structure, coil spring etc., and structure is comparatively complicated, and cost is higher, and also there is no need for the treadmill under the low speed, manual difficult processing is to finish in especially repairing.

In view of this, the purpose of this utility model provides sprocket wheel behind a kind of simple and easy rickshaw, it be after sprocket wheel directly be bearing on the face of cylinder of ratchet, the pawl end of ratchet is held with ordinary steel wire again, makes designs simplification.

The purpose of this utility model is achieved in that it mainly comprises a back sprocket wheel, two ratchets, a ratchet and ring washers, has an endoporus in the middle of the back sprocket wheel, and offer several through holes on the circumference, ratchet one side have external cylindrical surface and with the back sprocket wheel the endoporus bearing fit, the pawl end of ratchet is provided with a finer wire, this finer wire one end press the pawl end of ratchet and pass the back sprocket wheel a through hole, around the cover ratchet external cylindrical surface, and the other end be fixed in the back sprocket wheel another through hole in.

Described finer wire is the common finer wire of 0.05-0.1 millimeter.

Owing to adopt such scheme: simple in structure, with low cost, especially be convenient to manual repairing.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 the utility model exemplary embodiments cross-sectional schematic.

Fig. 2 the utility model exemplary embodiments is pulled down the schematic side view of ring washer.

Among the figure:

1, back sprocket wheel 11, through hole 12, endoporus 2, ratchet

21, pivot 22, finer wire 3, ratchet 31, external cylindrical surface

32, outside thread 33, negative thread 4, ring washer 41, negative thread

Present embodiment comprises back sprocket wheel 1, two ratchets 2, ratchet 3 and ring washers 4, as shown in Figure 1, and wherein:

The centre of back sprocket wheel 1 is an endoporus 12, and (tooth below) offers 4 through holes 11 on sprocket wheel 1 circumference of back.

Ratchet 2 usefulness pivots 21 are articulated in the side on sprocket wheel 1 circumference of back, belong to prior art, after the pawl end of this ratchet 2 connects a finer wire 22 1 ends and this finer wire 22 1 ends and presses the pawl end, pass an endoporus 12 of back sprocket wheel 1, around being enclosed within on ratchet 3 external cylindrical surfaces 31, and the other end of finer wire 22 is connected in corresponding another endoporus 12, and this finer wire 22 (the 0.05-0.1 millimeter is thick) is by the pawl end that presses down ratchet 2 and the indented joint of ratchet 3.

One side of ratchet 3 has external cylindrical surface 31 and outside thread 32, and the negative thread 33 of ratchet 3 endoporus, endoporus 12 bearing fits of external cylindrical surface 31 and back sprocket wheel 1, outside thread 32 is connected with the negative thread 41 of ring washer 4, and negative thread 33 is for (indicating among the figure) on the rear axle that is connected car.

Claims

1, sprocket wheel behind a kind of simple and easy rickshaw, comprise a back sprocket wheel (1), two ratchets (2), one ratchet (3) and a ring washer (4), it is characterized in that: have an endoporus (12) in the middle of the back sprocket wheel (1), and offer several through holes (11) on the circumference, ratchet (3) one sides have external cylindrical surface (31), and endoporus (12) bearing fit with back sprocket wheel (1), the pawl end of ratchet (2) is provided with a finer wire (22), these finer wire (22) one ends press the pawl end of ratchet (2), and pass a through hole (11) of back sprocket wheel (1), around the external cylindrical surface (31) of cover ratchet (3), and the other end is fixed in another through hole (11) of back sprocket wheel (1).

2, by sprocket wheel behind the described simple and easy rickshaw of claim 1, it is characterized in that: described finer wire (22) is the common finer wire of 0.05-0.1 millimeter.