Lock body of engine hood

Abstract

The invention relates to a lock body of an engine hood. The lock body of the engine hood is characterized in that a ratchet wheel is movably riveted to the lock body through a ratchet wheel shaft; a pawl is movably riveted to the lock body through a pawl shaft; a safety hook is movably riveted to the lock body through a safety hook rivet; a safety tension spring is connected between the safety hook and the lock body; a latch opening is formed in the lock body; the safety hook rotates about the safety hook rivet to drive the safety tension spring to elastically lock the latch opening or stagger the latch opening status; the ratchet wheel is arranged corresponding to the latch opening; a ratchet wheel spring is connected between the ratchet wheel and the pawl; the ratchet wheel and the pawl are rotated in opposite directions to engage and lock or rotated to release from the locking status by a back-to-back manner under the effect of the ratchet wheel spring.

Description

technical field [0001] The invention relates to a lock, in particular to a lock body for an automobile engine cover. Background technique [0002] The engine, circuit, oil circuit, brake system and transmission system installed under the hood of the car are all important components of the car. The locking between the cover and the car is crucial. Existing hood locks mostly adopt the engagement of ratchet and pawl to realize locking, such as the disclosed automobile engine lock with the patent number 201120480283. The ratchet is connected by the hood lock, and the ratchet is impacted by the ratchet. The ratchet pushes the pawl to overcome the ratchet tension spring so that the pawl rotates and engages with the ratchet wheel to achieve locking. The disadvantage is that the hood is large in size and heavy in weight. When the hood is closed, the impact force on the ratchet is relatively large, and the pawl rotates passively under force, and the rotational engagement between th...

AI Technical Summary

Problems solved by technology

Existing hood locks mostly adopt the engagement of ratchet and pawl to realize locking, such as the disclosed automobile engine lock with the patent number 201120480283. The ratchet is connected by the hood lock, and the ratchet is impacted by the ratchet. The ratchet pushes the pawl to overcome the ratchet tension spring so that the pawl rotates and engages with the ratchet wheel to achieve locking. The disadvantage is that the hood is large in size and heavy in weight. When the hood is closed, the impact force on the ratchet is relatively large, and the pawl rotates passively under force, and the rotational engagement between the ratchet and the pawl is easily damaged; in addition, the ratchet and the pawl are reset by connecting the lock body with their respective extension springs, and the ratchet extension spring and the ratchet The claw tension spring works independently. After long-term use, the performance changes or any damage occurs. The ratchet or pawl cannot be effectively reset, and the engine lock is scrapped, and the service life is short.

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