电动叉车及其门架缓冲装置

The buffer device, which combines a potentiometer with a gear pump module, solves the impact problem of the electric forklift mast when it is lifted to the top, achieves a smooth speed reduction, reduces energy consumption and maintenance costs, and improves the stability and safety of the entire vehicle.

CN224513130UActive Publication Date: 2026-07-17太重集团(上海)装备技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
太重集团(上海)装备技术有限公司
Filing Date
2025-07-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing electric forklift mast experiences a sudden change in speed when lifted to the top, resulting in poor overall vehicle stability. Existing buffering technologies suffer from high energy consumption, high maintenance costs, and short equipment lifespan.

Method used

A buffer device combining a potentiometer and a gear pump module is used. The operating speed of the lifting cylinder is adjusted by the controller module to achieve a smooth decrease in the gantry speed, avoiding the use of springs and throttling structures and reducing hydraulic oil overflow losses.

Benefits of technology

This achieves a smooth decrease in gantry speed, reduces system energy consumption and maintenance costs, improves overall vehicle stability and safety, and extends equipment lifespan.

✦ Generated by Eureka AI based on patent content.

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Abstract

本实用新型公开了一种电动叉车及其门架缓冲装置，门架缓冲装置包括第一门架、设置于第一门架内侧的第二门架、设置于第一门架与第二门架之间的多个起升油缸，其中，起升油缸包括设置于第一门架底部的缸筒、套设于缸筒内的活塞杆，活塞杆自由端连接于第二门架内部，第一门架上部设置有电位器，第二门架底部设置有对应于电位器的接触板，电位器连接于控制器模块，起升油缸连接于齿轮泵模块；本装置通过电位器压缩行程与齿轮泵模块转速的线性耦合关系，实现第二门架起升速度平滑递减，避免现有技术中阶梯式降速或弹性势能释放产生的冲击，减少液压油溢流损耗，降低系统能耗与油温升高问题，且无易损弹簧件，减轻了油泵负载，降低了维护成本与难度。
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Claims

1. A mast buffer device of an electric forklift truck, said electric forklift truck having a controller module and a gear pump module connected to each other, characterized in that, The mast buffer device of the electric forklift includes a first mast, a second mast disposed inside the first mast, and a plurality of lifting cylinders disposed between the first mast and the second mast, wherein: The lifting cylinder includes a cylinder barrel disposed at the bottom of the first gantry and a piston rod sleeved inside the cylinder barrel. The free end of the piston rod is connected to the inside of the second gantry. A potentiometer is disposed at the upper part of the first gantry, and a contact plate corresponding to the potentiometer is disposed at the bottom of the second gantry. The potentiometer is connected to the controller module, and the lifting cylinder is connected to the gear pump module.

2. The cushioning device for the mast of an electric fork truck according to claim 1, characterized by, The first gantry has a sliding groove on its inner side, and the two ends of the second gantry are slidably connected to the sliding groove.

3. The cushioning device for the mast of an electric fork truck according to claim 1, characterized by, The potentiometer is connected below a contact travel that matches the contact plate.

4. The cushioning device for the mast of an electric fork truck according to claim 1, wherein The number of lifting cylinders is 2 to 4.

5. The cushioning device for the mast of an electric fork truck according to claim 1, wherein Multiple lifting cylinders are evenly distributed between the first gantry and the second gantry.

6. The mast buffer device of the electric forklift according to claim 1, characterized in that, The second gantry is provided with a fork on the side away from the first gantry.

7. An electric fork truck characterized by The electric forklift includes the mast buffer device according to any one of claims 1-6.