A new type of ratchet pawl mechanism with main and auxiliary pawls for weakening collision and reducing wear

Abstract

The invention relates to an automobile door lock, belongs to the field of automobile engineering and discloses a novel ratchet-and-pawl mechanism capable of weakening impact and reducing abrasion andprovided with main and auxiliary pawls. The movable auxiliary pawl with a special-posture spring and connecting rod mechanism is constructed. The molding surface, making contact with a ratchet wheel,of the auxiliary pawl is a roller, and impact and abrasion between the ratchet wheel and the main and axillary pawls are reduced. The spring and connecting rod mechanism is composed of an auxiliary pawl connecting rod with the front end provided with the roller, and a spring in a hinged mode. The auxiliary pawl precedes the main pawl to make contact with the ratchet wheel. Impact of the ratchet wheel can be absorbed by means of the roller and the spring, and then the main pawl makes contact with the ratchet wheel. The special posture of the spring and connecting rod mechanism occurs when the centers of a roller rotary shaft, an auxiliary pawl rotary shaft and a spring support are collinear, the auxiliary pawl and the main pawl can be fast switched, and the effect that the main pawl locks the ratchet wheel is achieved. According to the novel ratchet-and-pawl mechanism provided by the invention, a safe locking characteristic of a general ratchet-and-pawl mechanism is kept, impact and abrasion between the ratchet wheel and the pawls are reduced, and the novel ratchet-and-pawl mechanism can be widely applied to door locks and other ratchet-and-pawl mechanisms.

Description

technical field [0001] The invention relates to the field of automobile engineering, in particular to a novel ratchet pawl mechanism with main and auxiliary pawls for reducing collision and reducing wear. Background technique [0002] The ratchet and pawl mechanism is widely used in various occasions. The rigid contact between the pawl and the ratchet usually produces a large impact force, causing a large noise, resulting in a reduction in the life of parts and systems, and reducing the comfort of the door lock when using it. At present, the main method to reduce the collision and wear of the ratchet pawl mechanism is to optimize the design of the contact surface, open a buffer groove, and change the material of the contact surface. The method is not universal and difficult to generalize. [0003] The domestic patent CN106468116A discloses a car door lock that helps reduce the release force. The principle is that the ratchet pawls are in contact with the drum body on both s...

AI Technical Summary

Problems solved by technology

[0004] The patented ratchet pawl optimization design makes the door lock reduce the closing force and opening force of the door under the large sealing force; however, the locking contact surface is a drum-shaped surface, and the ratchet ratchet locks the door. The reliability is not high, and it is easily affected by external vibrations. , the impact of the impact and accidentally opened, there is a certain safety hazard

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