Automatic decompression device of engine
An automatic decompression and engine technology, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of inconvenient installation and maintenance, difficult control of precision, and influence on decompression effect, etc., and achieves convenient installation and maintenance. Simple, life-extending effect
Inactive Publication Date: 2007-10-24
重庆山峰凸轮有限公司
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Problems solved by technology
However, in the process of use, it is found that the structure of the existing decompression mechanism has deficiencies: the first is poor manufacturability, the precision is not easy to control, and the installation and maintenance are inconvenient; the second is that the friction resistance is large, and the parts are easy to wear; The disc contact part at the lower end of the tappet is relatively eccentric, which affects the decompression effect
Method used
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[0017] The structure of the present invention will be further described below in conjunction with the accompanying drawings.
[0018] Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the counterweight 6 is fixed on the arc-shaped centrifugal block 2, and one end of the centrifugal block 2 is positioned and connected to the center with the first positioning pin 11. On the side of the camshaft gear 1, the centrifugal block can rotate relatively around the first positioning pin. The limit stopper 8 at the free end of the centrifugal block 2 is in contact with the outer circle of the camshaft. Since it is in circular contact with the camshaft, it is not easy Bump the camshaft, and affect the accuracy of the return of the centrifugal block; use the second positioning pin 12 to locate one end of the return tension spring 3 and connect it to the same side of the camshaft gear 1, and the other hook to hang on the support on the centrifugal block. on block 13;
[0019] ...
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The present invention involves engine automatic decompressing device. It includes circular centrifugal block which one end is positioned and connected on the lateral face of cam axle gear, backing extension spring which one end is positioned and connected on the same lateral face of cam axle gear and another end is hooked on the centrifugal block, top pin which passes through the slant hole on the basic circle of cam axle exhaustion cam, and the centrifugal block is fixed with counterweight block. It is characterized by: the inner of centrifugal block is equipped with top block, one end of top pin is contacted with the top block; the free end of centrifugal block is equipped with limiting block which is corresponded or contacted with the excircle of cam axle. The two ends of top pin are hemispherical, the fastening-groove between the top pin and the contacting end of top block is in-equipped with circlip. The invention has the following advantages: simple structure, high accuracy and reliability; small contact drag friction between elements, non-perishable, extended use life; easy to be processed and manufacted, and convenient installation and maintenance.
Description
technical field [0001] The invention relates to an engine attachment, in particular to an engine automatic decompression mechanism. Background technique [0002] In order to make the engine start easily and ensure the normal operation of the engine, a decompression mechanism is provided on the camshaft driven by the crankshaft. The centrifugal block of the existing decompression mechanism is positioned and connected to the side of the gear at one end of the camshaft, the push piece is positioned and connected near the base circle of the exhaust cam of the camshaft, and one end of the push piece is in contact with the top block on the centrifugal block , the other end is in contact with the disk at the lower end of the valve lifter; when the engine speed reaches a certain value, the centrifugal block rotates around the positioning pin under the action of centrifugal force, and the top block on it also moves accordingly, and the upper end of the push piece is in contact with t...
Claims
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IPC IPC(8): F01L13/08
Inventor 周秀明杨恺华
Owner 重庆山峰凸轮有限公司