Hydraulic cylinder telescopic control system and crane
CN224691691UActive Publication Date: 2026-08-28SANY PALFINGER SPECIAL VEHICLE
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Patent Information
- Application Number
- CN202621139057.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-27
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2036-07-27
AI Technical Summary
Technical Problem
[0005]有鉴于此，本实用新型提供了一种油缸伸缩控制系统及起重机，以解决系统效率低，油缸伸缩速度慢的问题
Benefits of technology
[0020]有益效果：将控制阀设置为先导控制阀，当先导控制阀失电截止时，切换阀的第一连接端与第一外接先导油口断连，第一连接端未获得先导压力，控制阀组处于第一工作状态，即第一进油口与第一出油口连通，第一进油口与第二出油口断连。
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Figure CN224691691U_ABST
Abstract
The utility model relates to the technical field of hoist, disclose a kind of oil cylinder telescopic control system and hoist.Oil cylinder telescopic control system includes control valve group, first oil cylinder and second oil cylinder.Control valve group has first oil inlet, first oil outlet and second oil outlet, and first oil inlet is connected first external oil port.Control valve group has two working conditions, when being in first working condition, first oil inlet is communicated with first oil outlet, when being in second working condition, first oil inlet is communicated with second oil outlet.First oil cylinder has first rod cavity, first rodless cavity and core pipe cavity, and first rodless cavity is connected with first oil outlet, and core pipe cavity is connected with second oil outlet, and first rod cavity is connected second external oil port.Second oil cylinder has second rod cavity and second rodless cavity, and second rodless cavity is connected with core pipe cavity, and second rodless cavity is connected with first rodless cavity.The utility model is used to avoid the problem of low system efficiency and slow telescopic speed of oil cylinder.
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