Snap spring structure

Abstract

The invention relates to a snap spring structure which comprises a conical snap spring body. The snap spring structure is characterized in that the snap spring body is of a non-closed conical structure, a plurality of axial water grooves are formed in the inner wall of the snap spring body, annular tooth parts are arranged on the inner wall, between every two adjacent water grooves, of the snap spring body, and the thicknesses of teeth on the annular tooth parts are gradually increased from the narrow end of the snap spring body to the wide end of the snap spring body. Compared with the prior art, the snap spring structure has the beneficial effects that the snap spring body is of the conical structure, through conical-surface-fit assembling of the snap spring body and a snap spring seat, the snap spring body and the snap spring seat move relatively, and the snap spring body is contracted to hold a core; compared with a closed snap spring, the snap spring structure of the non-closed structure can be contracted more tightly during movement relative to the snap spring seat, the core is tightly clamped through contraction, and the core can be snapped and taken; and accordingly, the snap spring body of the non-closed structure can clamp and take the core more firmly, the core falling phenomenon is avoided, and core clamping and taking reliability is improved.

Description

technical field [0001] The invention relates to a clamp spring structure. Background technique [0002] The circlip is one of the key components of the core lifting mechanism. When the inner tube of the drill pipe is filled with cores, the inner tube is lifted up. At this time, the relative movement of the circlip, the inner tube and the circlip seat is tightly held and snapped off. The rock core, thus smoothly fish out the rock core. The existing circlips are all closed conical structures, and ring-shaped tooth sockets with the same thickness are arranged inside. The circlips of this structure have limited shrinkage, so it is easy to cause the clamping center to be unstable, resulting in the phenomenon of falling out of the center; on the other hand, due to The circlip is a tapered structure, so the design of the ring-shaped tooth socket with equal thickness on the inner wall, after the core rubs against the narrower lower end of the circlip, the friction between the rock ...

AI Technical Summary

Problems solved by technology

The existing circlips are all closed conical structures, and ring-shaped tooth sockets with the same thickness are arranged inside. The circlips of this structure have limited shrinkage, so it is easy to cause the clamping center to be unstable, resulting in the phenomenon of falling out of the center; on the other hand, due to The circlip is a tapered structure, so the design of the ring-shaped tooth socket with equal thickness on the inner wall, after the core rubs against the narrower lower end of the circlip, the friction between the rock core and the wider upper end of the circlip does not increase. , the clinging force of the components cannot be guaranteed between the circlip and the upper end of the core, resulting in loose core

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