CN2816362Y

CN2816362Y - Cam pressure-reducer

Info

Publication number: CN2816362Y
Application number: CN 200520112646
Authority: CN
Inventors: 叶继才
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-07
Filing date: 2005-07-07
Publication date: 2006-09-13
Anticipated expiration: 2015-07-07

Abstract

The utility model provides a cam pressure reducer which comprises a nylon gear, a cam shaft, a cam on the cam shaft, a centrifugal fling block and a supporting post. The utility model is characterized in that one end of the cam shaft is provided with a triangular spline which is tightly connected with the nylon gear; a circular arc-shaped spacing trough and an inclined surface are arranged on the centrifugal fling block; the supporting post which penetrates through the cam shaft slantwise is matched with the inclined surface on the centrifugal fling block to be assembled; the inclined surface is used for limiting the moving distance of the supporting post; the spacing trough is used for preventing the moving distance of the centrifugal fling block; one end of the centrifugal fling block is provided with a fixed pin on which a disc type extension spring is arranged; the other end of the centrifugal fling block is provided with a spacing pin which is fixed on the nylon gear and is matched with the spacing trough on the centrifugal fling block. The utility model has the advantages of simple structure and convenient operation.

Description

The cam decompressor

Technical field

The utility model relates to a kind of cam decompressor, can lower cylinder head pressure when relating in particular to the starting of a kind of mini engine and start after can self-righting cam decompressor, it can make engine start merrily and lightheartedly rotate, thereby is convenient to starting.

Background technique

Usually mini engine all will manually be opened exhaust valve when hand starting, after shaking certain rotating speed, make again with starting after manually closing exhaust, and this mechanism structure complexity, labor intensity is big, and therefore inconvenient operation is necessary to further improve to it.

The model utility content

The purpose of this utility model is exactly the defective that overcomes above-mentioned prior art, and a kind of cam decompressor is provided, and it can make operator's quick rotation main shaft very like a cork, and has the flexible characteristics of compact structure.

The purpose of this utility model makes by following technical proposals and realizes, cam decompressor provided by the utility model comprises cam, centrifugal block for clutch use and the fore-set on nylon gear, camshaft, the camshaft, wherein said camshaft one end has serration, and itself and nylon gear securely fuse; Restraining groove and plane of inclination that circular arc is arranged above the centrifugal block for clutch use, the fore-set that camshaft is passed in inclination is the assembling that matches with the plane of inclination on the centrifugal block for clutch use, and its plane of inclination is used to limit the move distance of fore-set, above-mentioned restraining groove is the move distance that is used to stop centrifugal block for clutch use, one end of centrifugal block for clutch use is provided with fixing pin, and this fixing pin is provided with the disc type extension spring, the other end at centrifugal block for clutch use is provided with position limit pin, and this position limit pin is to be fixed on the nylon gear and to match with restraining groove on the described centrifugal block for clutch use.

In use, the very light rotating spindle apace of operator (being camshaft), make the machine ignition start, when reaching certain rotating speed after the starting, centrifugal block for clutch use separates disengagement under action of centrifugal force, but limited pin limit is put in certain position, and described fore-set falls after rise and is lower than cam base circle on the camshaft, restores cylinder head pressure; When main shaft was static, by disc type extension spring pulling centrifugal block for clutch use return, and limited pin limit put in situ and goes up, and promotes fore-set by centrifugal block for clutch use this moment it is released, and be higher than its cam base circle position.

The cold rolled plate stretch forming of described centrifugal block for clutch use.

The beneficial effects of the utility model are simple in structure, and are easy to operate.

For enabling to make clearer understanding technological means of the present utility model and effect, and can implement according to this, with next conjunction with figs. and preferred embodiment of the present utility model, with further detailed presentations structure of the present utility model according to this description.

Description of drawings

Fig. 1 is the schematic representation of cam decompressor of the present utility model;

Fig. 2 gets rid of the piece schematic representation;

Fig. 3 is the schematic representation of camshaft.

Mode of execution

Please referring to Fig. 1 to Fig. 3, cam decompressor provided by the utility model comprises nylon gear 1, camshaft 7, centrifugal block for clutch use 2, and wherein said camshaft 7 one ends have serration 9 (see figure 3)s, and itself and nylon gear 1 securely fuse; Restraining groove 10 and plane of inclination 11 (see figure 2)s that circular arc is arranged above the centrifugal block for clutch use 2, the fore-set 6 that camshaft 7 is passed in inclination is the assemblings that match with the plane of inclination 11 on the centrifugal block for clutch use 2, and its plane of inclination 11 is used to limit the move distance of fore-set 6, and its fore-set 6 is provided with anticreep back-up ring 8; Above-mentioned restraining groove 10 is the move distances that are used to stop centrifugal block for clutch use, one end of centrifugal block for clutch use 2 is provided with fixing pin 3, and this fixing pin 3 is provided with disc type extension spring 4, the other end at centrifugal block for clutch use 2 is provided with position limit pin 5, and this position limit pin 5 is to be fixed on the nylon gear 1 and to match with restraining groove 10 on the described centrifugal block for clutch use.

Above-mentioned accompanying drawing that discloses and explanation only are embodiment of the present utility model, and be non-for limiting embodiment of the present utility model; All personages who is familiar with this skill, it complies with feature category of the present utility model, and other equivalence of being done changes or modifies, and all should be encompassed in the claimed claim of following the application.

Claims

1. cam decompressor, cam, centrifugal block for clutch use and fore-set that it comprises on nylon gear, camshaft, the camshaft is characterized in that described camshaft one end has serration, itself and nylon gear securely fuse; Restraining groove and plane of inclination that circular arc is arranged above the centrifugal block for clutch use, the fore-set that camshaft is passed in inclination is the assembling that matches with the plane of inclination on the centrifugal block for clutch use, and its plane of inclination is used to limit the move distance of fore-set, above-mentioned restraining groove is the move distance that is used to stop centrifugal block for clutch use, one end of centrifugal block for clutch use is provided with fixing pin, and this fixing pin is provided with the disc type extension spring, the other end at centrifugal block for clutch use is provided with position limit pin, and this position limit pin is to be fixed on the nylon gear and to match with restraining groove on the described centrifugal block for clutch use.