Bidirectional buffer speed adjustable hydraulic oil cylinder

Abstract

The invention discloses a bidirectional buffer speed adjustable hydraulic oil cylinder, and belongs to the field of hydraulic cylinders. According to the technical aims to be achieved, the shape of the oil cylinder is not changed, the size and mounting space of the oil cylinder are not increased, the structure is simple, and the bidirectional buffer speed is adjustable through the hydraulic oil cylinder. According to the technical scheme adopted for achieving the technical aims, the bidirectional buffer speed adjustable hydraulic oil cylinder comprises a cylinder body; a piston and a piston rod are arranged in the cylinder body; a throttling channel is arranged on the side, back onto the piston rod, of the piston, and a first one-way valve is arranged in the middle and connected with a rodless cavity oil inlet; a rod cavity oil inlet and a second one-way valve are arranged at the rear end of the piston rod; a thickened segment is arranged on the piston rod and provided with an oil leaking groove; and the piston rod is controlled to stretch out and retract through the one-way valves, and the stretching-out and retracting speed is controlled through the throttling channel and the oilleaking groove. The bidirectional buffer speed adjustable hydraulic oil cylinder can be widely applied to the field of hydraulic cylinders.

Description

technical field [0001] The invention relates to a hydraulic oil cylinder with adjustable bidirectional buffering speed, which belongs to the technical field of hydraulic cylinders. Background technique [0002] If the working mechanism driven by the hydraulic actuator cylinder is fast or has a large holding capacity, if it stops suddenly or changes direction, it will cause mechanical collision, generate large vibration shock and noise, and bring additional damage to the entire mechanical equipment. The mechanical life is reduced, and the environmental pollution is increased. In order to reduce or eliminate the impact, it is necessary for the cylinder to take certain measures at the end of the stroke to achieve a gradual decrease in speed until it reaches zero. [0003] At present, the commonly used methods are: through the design of the hydraulic system, adding a buffer circuit on the oil circuit, and adding a sensor on the cylinder to achieve buffering; by setting a rectang...

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Problems solved by technology

[0002] If the working mechanism driven by the hydraulic actuator cylinder is fast or has a large holding capacity, if it stops suddenly or changes direction, it will cause mechanical collision, generate large vibration shock and noise, and bring additional damage to the entire mechanical equipment. It reduces the mechanical life and increases the environmental pollution. In order to reduce or eliminate the impact, it is necessary for the cylinder to take certain measures at the end of the stroke to realize the speed decrease until it reaches zero.

[0003] At present, the commonly used methods are: through the design of the hydraulic system, adding a buffer circuit on the oil circuit, and adding a sensor on the cylinder to achieve buffering; by setting a rectangular or triangular buffer groove at the end of the cylinder retraction stroke, and setting a corresponding one on the end face of the piston rodless cavity. This type of buffer is limited by the structure, and only one end can be retracted for buffering, and the buffer structure of the check valve is added. Usually, the structure of the check valve is external, which changes the traditional structure of the oil cylinder, increases the volume of the oil cylinder, and increases Cylinder installation space

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