Pull rod cylinder with buffer structure

By designing a structure that combines the buffer sleeve and the buffer cavity in the pull rod cylinder, the impact problem of the existing pull rod cylinder on the rear end cover under high-speed operation is solved, achieving a longer service life and uniform buffering pressure.

CN222668537UActive Publication Date: 2025-03-25KUNSHAN QILITE OIL CYLINDER HYDRAULIC EQUIP CO LTD
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Patent Information

Application Number
CN202420895706.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-28
Publication Date
2025-03-25
Estimated Expiration
2034-04-28

AI Technical Summary

Technical Problem

The existing pull rod cylinders damage the impact of the rear end cover when the piston is running at high speed, which affects the service life of the oil cylinder. The existing pull rod cylinders with buffering devices have too much buffering braking force at the beginning of buffering, resulting in inertial impact.

Method used

A pull rod cylinder with a buffer structure is designed, and a structure that combines the buffer sleeve and the buffer cavity. The buffer sleeve is embedded in the buffer cavity. The buffer sleeve is equipped with a number of buffer holes that communicate with the threaded holes. The throttling area varies with the stroke and the buffer pressure remains uniform.

Benefits of technology

It effectively avoids impact of the piston on the rear end cover at high speed, improves the service life of the oil cylinder, and reduces inertial impact through uniform buffering pressure.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model discloses a pull rod cylinder with a buffer structure, which is characterized in that a cylinder barrel is arranged between a front end cover and a rear end cover, and a buffer cavity is arranged on one side, close to the front end cover, of the rear end cover; the piston rod penetrates through a center hole of the front end cover and can axially move; the piston is in threaded connection with the piston rod; the piston rod drives the piston to axially move in the cylinder barrel; the buffering sleeve can be embedded into the buffering cavity, the buffering sleeve is in threaded connection with the piston rod, the buffering sleeve is provided with a plurality of first buffering holes axially parallel to the second threaded hole and a plurality of sets of second buffering holes distributed in the radial direction of the buffering sleeve at equal intervals, and each set of second buffering holes communicate with the corresponding first buffering hole; according to the pull rod cylinder with the buffering structure, in the buffering process that the buffering sleeve is embedded into the buffering cavity, the throttling area changes along with the stroke, the buffering pressure is kept uniform, damage caused by collision of the piston to the rear end cover under high-speed operation can be avoided, and the service life of the oil cylinder is effectively prolonged.
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